// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( c ) 2023 MediaTek Inc .
* Author : Balsam CHIHI < bchihi @ baylibre . com >
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/thermal.h>
#include <dt-bindings/thermal/mediatek,lvts-thermal.h>
#include "../thermal_hwmon.h"
#define LVTS_MONCTL0(__base) (__base + 0 x0000)
#define LVTS_MONCTL1(__base) (__base + 0 x0004)
#define LVTS_MONCTL2(__base) (__base + 0 x0008)
#define LVTS_MONINT(__base) (__base + 0 x000C)
#define LVTS_MONINTSTS(__base) (__base + 0 x0010)
#define LVTS_MONIDET0(__base) (__base + 0 x0014)
#define LVTS_MONIDET1(__base) (__base + 0 x0018)
#define LVTS_MONIDET2(__base) (__base + 0 x001C)
#define LVTS_MONIDET3(__base) (__base + 0 x0020)
#define LVTS_H2NTHRE(__base) (__base + 0 x0024)
#define LVTS_HTHRE(__base) (__base + 0 x0028)
#define LVTS_OFFSETH(__base) (__base + 0 x0030)
#define LVTS_OFFSETL(__base) (__base + 0 x0034)
#define LVTS_MSRCTL0(__base) (__base + 0 x0038)
#define LVTS_MSRCTL1(__base) (__base + 0 x003C)
#define LVTS_TSSEL(__base) (__base + 0 x0040)
#define LVTS_CALSCALE(__base) (__base + 0 x0048)
#define LVTS_ID(__base) (__base + 0 x004C)
#define LVTS_CONFIG(__base) (__base + 0 x0050)
#define LVTS_EDATA00(__base) (__base + 0 x0054)
#define LVTS_EDATA01(__base) (__base + 0 x0058)
#define LVTS_EDATA02(__base) (__base + 0 x005C)
#define LVTS_EDATA03(__base) (__base + 0 x0060)
#define LVTS_MSR0(__base) (__base + 0 x0090)
#define LVTS_MSR1(__base) (__base + 0 x0094)
#define LVTS_MSR2(__base) (__base + 0 x0098)
#define LVTS_MSR3(__base) (__base + 0 x009C)
#define LVTS_IMMD0(__base) (__base + 0 x00A0)
#define LVTS_IMMD1(__base) (__base + 0 x00A4)
#define LVTS_IMMD2(__base) (__base + 0 x00A8)
#define LVTS_IMMD3(__base) (__base + 0 x00AC)
#define LVTS_PROTCTL(__base) (__base + 0 x00C0)
#define LVTS_PROTTA(__base) (__base + 0 x00C4)
#define LVTS_PROTTB(__base) (__base + 0 x00C8)
#define LVTS_PROTTC(__base) (__base + 0 x00CC)
#define LVTS_CLKEN(__base) (__base + 0 x00E4)
#define LVTS_PERIOD_UNIT 0
#define LVTS_GROUP_INTERVAL 0
#define LVTS_FILTER_INTERVAL 0
#define LVTS_SENSOR_INTERVAL 0
#define LVTS_HW_FILTER 0 x0
#define LVTS_TSSEL_CONF 0 x13121110
#define LVTS_CALSCALE_CONF 0 x300
#define LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR0 BIT(3 )
#define LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR1 BIT(8 )
#define LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR2 BIT(13 )
#define LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR3 BIT(25 )
#define LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR0 BIT(2 )
#define LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR1 BIT(7 )
#define LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR2 BIT(12 )
#define LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR3 BIT(24 )
#define LVTS_INT_SENSOR0 0 x0009001F
#define LVTS_INT_SENSOR1 0 x001203E0
#define LVTS_INT_SENSOR2 0 x00247C00
#define LVTS_INT_SENSOR3 0 x1FC00000
#define LVTS_SENSOR_MAX 4
#define LVTS_GOLDEN_TEMP_MAX 62
#define LVTS_GOLDEN_TEMP_DEFAULT 50
#define LVTS_COEFF_A_MT8195 -250460
#define LVTS_COEFF_B_MT8195 250460
#define LVTS_COEFF_A_MT7988 -204650
#define LVTS_COEFF_B_MT7988 204650
#define LVTS_MSR_IMMEDIATE_MODE 0
#define LVTS_MSR_FILTERED_MODE 1
#define LVTS_MSR_READ_TIMEOUT_US 400
#define LVTS_MSR_READ_WAIT_US (LVTS_MSR_READ_TIMEOUT_US / 2 )
#define LVTS_MINIMUM_THRESHOLD 20000
static int golden_temp = LVTS_GOLDEN_TEMP_DEFAULT;
static int golden_temp_offset;
struct lvts_sensor_data {
int dt_id;
u8 cal_offsets[3 ];
};
struct lvts_ctrl_data {
struct lvts_sensor_data lvts_sensor[LVTS_SENSOR_MAX];
u8 valid_sensor_mask;
int offset;
int mode;
};
#define VALID_SENSOR_MAP(s0, s1, s2, s3) \
.valid_sensor_mask = (((s0) ? BIT(0 ) : 0 ) | \
((s1) ? BIT(1 ) : 0 ) | \
((s2) ? BIT(2 ) : 0 ) | \
((s3) ? BIT(3 ) : 0 ))
#define lvts_for_each_valid_sensor(i, lvts_ctrl) \
for ((i) = 0 ; (i) < LVTS_SENSOR_MAX; (i)++) \
if (!((lvts_ctrl)->valid_sensor_mask & BIT(i))) \
continue ; \
else
struct lvts_data {
const struct lvts_ctrl_data *lvts_ctrl;
const u32 *conn_cmd;
const u32 *init_cmd;
int num_lvts_ctrl;
int num_conn_cmd;
int num_init_cmd;
int temp_factor;
int temp_offset;
int gt_calib_bit_offset;
unsigned int def_calibration;
};
struct lvts_sensor {
struct thermal_zone_device *tz;
void __iomem *msr;
void __iomem *base;
int id;
int dt_id;
int low_thresh;
int high_thresh;
};
struct lvts_ctrl {
struct lvts_sensor sensors[LVTS_SENSOR_MAX];
const struct lvts_data *lvts_data;
u32 calibration[LVTS_SENSOR_MAX];
u8 valid_sensor_mask;
int mode;
void __iomem *base;
int low_thresh;
int high_thresh;
};
struct lvts_domain {
struct lvts_ctrl *lvts_ctrl;
struct reset_control *reset;
struct clk *clk;
int num_lvts_ctrl;
void __iomem *base;
size_t calib_len;
u8 *calib;
#ifdef CONFIG_DEBUG_FS
struct dentry *dom_dentry;
#endif
};
#ifdef CONFIG_MTK_LVTS_THERMAL_DEBUGFS
#define LVTS_DEBUG_FS_REGS(__reg) \
{ \
.name = __stringify(__reg), \
.offset = __reg(0 ), \
}
static const struct debugfs_reg32 lvts_regs[] = {
LVTS_DEBUG_FS_REGS(LVTS_MONCTL0),
LVTS_DEBUG_FS_REGS(LVTS_MONCTL1),
LVTS_DEBUG_FS_REGS(LVTS_MONCTL2),
LVTS_DEBUG_FS_REGS(LVTS_MONINT),
LVTS_DEBUG_FS_REGS(LVTS_MONINTSTS),
LVTS_DEBUG_FS_REGS(LVTS_MONIDET0),
LVTS_DEBUG_FS_REGS(LVTS_MONIDET1),
LVTS_DEBUG_FS_REGS(LVTS_MONIDET2),
LVTS_DEBUG_FS_REGS(LVTS_MONIDET3),
LVTS_DEBUG_FS_REGS(LVTS_H2NTHRE),
LVTS_DEBUG_FS_REGS(LVTS_HTHRE),
LVTS_DEBUG_FS_REGS(LVTS_OFFSETH),
LVTS_DEBUG_FS_REGS(LVTS_OFFSETL),
LVTS_DEBUG_FS_REGS(LVTS_MSRCTL0),
LVTS_DEBUG_FS_REGS(LVTS_MSRCTL1),
LVTS_DEBUG_FS_REGS(LVTS_TSSEL),
LVTS_DEBUG_FS_REGS(LVTS_CALSCALE),
LVTS_DEBUG_FS_REGS(LVTS_ID),
LVTS_DEBUG_FS_REGS(LVTS_CONFIG),
LVTS_DEBUG_FS_REGS(LVTS_EDATA00),
LVTS_DEBUG_FS_REGS(LVTS_EDATA01),
LVTS_DEBUG_FS_REGS(LVTS_EDATA02),
LVTS_DEBUG_FS_REGS(LVTS_EDATA03),
LVTS_DEBUG_FS_REGS(LVTS_MSR0),
LVTS_DEBUG_FS_REGS(LVTS_MSR1),
LVTS_DEBUG_FS_REGS(LVTS_MSR2),
LVTS_DEBUG_FS_REGS(LVTS_MSR3),
LVTS_DEBUG_FS_REGS(LVTS_IMMD0),
LVTS_DEBUG_FS_REGS(LVTS_IMMD1),
LVTS_DEBUG_FS_REGS(LVTS_IMMD2),
LVTS_DEBUG_FS_REGS(LVTS_IMMD3),
LVTS_DEBUG_FS_REGS(LVTS_PROTCTL),
LVTS_DEBUG_FS_REGS(LVTS_PROTTA),
LVTS_DEBUG_FS_REGS(LVTS_PROTTB),
LVTS_DEBUG_FS_REGS(LVTS_PROTTC),
LVTS_DEBUG_FS_REGS(LVTS_CLKEN),
};
static void lvts_debugfs_exit(void *data)
{
struct lvts_domain *lvts_td = data;
debugfs_remove_recursive(lvts_td->dom_dentry);
}
static int lvts_debugfs_init(struct device *dev, struct lvts_domain *lvts_td)
{
struct debugfs_regset32 *regset;
struct lvts_ctrl *lvts_ctrl;
struct dentry *dentry;
char name[64 ];
int i;
lvts_td->dom_dentry = debugfs_create_dir(dev_name(dev), NULL);
if (IS_ERR(lvts_td->dom_dentry))
return 0 ;
for (i = 0 ; i < lvts_td->num_lvts_ctrl; i++) {
lvts_ctrl = &lvts_td->lvts_ctrl[i];
sprintf(name, "controller%d" , i);
dentry = debugfs_create_dir(name, lvts_td->dom_dentry);
if (IS_ERR(dentry))
continue ;
regset = devm_kzalloc(dev, sizeof (*regset), GFP_KERNEL);
if (!regset)
continue ;
regset->base = lvts_ctrl->base;
regset->regs = lvts_regs;
regset->nregs = ARRAY_SIZE(lvts_regs);
debugfs_create_regset32("registers" , 0400 , dentry, regset);
}
return devm_add_action_or_reset(dev, lvts_debugfs_exit, lvts_td);
}
#else
static inline int lvts_debugfs_init(struct device *dev,
struct lvts_domain *lvts_td)
{
return 0 ;
}
#endif
static int lvts_raw_to_temp(u32 raw_temp, int temp_factor)
{
int temperature;
temperature = ((s64)(raw_temp & 0 xFFFF) * temp_factor) >> 14 ;
temperature += golden_temp_offset;
return temperature;
}
static u32 lvts_temp_to_raw(int temperature, int temp_factor)
{
u32 raw_temp = ((s64)(golden_temp_offset - temperature)) << 14 ;
raw_temp = div_s64(raw_temp, -temp_factor);
return raw_temp;
}
static int lvts_get_temp(struct thermal_zone_device *tz, int *temp)
{
struct lvts_sensor *lvts_sensor = thermal_zone_device_priv(tz);
struct lvts_ctrl *lvts_ctrl = container_of(lvts_sensor, struct lvts_ctrl,
sensors[lvts_sensor->id]);
const struct lvts_data *lvts_data = lvts_ctrl->lvts_data;
void __iomem *msr = lvts_sensor->msr;
u32 value;
int rc;
/*
* Measurement registers :
*
* LVTS_MSR [ 0 - 3 ] / LVTS_IMMD [ 0 - 3 ]
*
* Bits :
*
* 32 - 17 : Unused
* 16 : Valid temperature
* 15 - 0 : Raw temperature
*/
rc = readl_poll_timeout(msr, value, value & BIT(16 ),
LVTS_MSR_READ_WAIT_US, LVTS_MSR_READ_TIMEOUT_US);
/*
* As the thermal zone temperature will read before the
* hardware sensor is fully initialized , we have to check the
* validity of the temperature returned when reading the
* measurement register . The thermal controller will set the
* valid bit temperature only when it is totally initialized .
*
* Otherwise , we may end up with garbage values out of the
* functionning temperature and directly jump to a system
* shutdown .
*/
if (rc)
return -EAGAIN;
*temp = lvts_raw_to_temp(value & 0 xFFFF, lvts_data->temp_factor);
return 0 ;
}
static void lvts_update_irq_mask(struct lvts_ctrl *lvts_ctrl)
{
static const u32 high_offset_inten_masks[] = {
LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR0,
LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR1,
LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR2,
LVTS_MONINT_OFFSET_HIGH_INTEN_SENSOR3,
};
static const u32 low_offset_inten_masks[] = {
LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR0,
LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR1,
LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR2,
LVTS_MONINT_OFFSET_LOW_INTEN_SENSOR3,
};
u32 value = 0 ;
int i;
value = readl(LVTS_MONINT(lvts_ctrl->base));
lvts_for_each_valid_sensor(i, lvts_ctrl) {
if (lvts_ctrl->sensors[i].high_thresh == lvts_ctrl->high_thresh
&& lvts_ctrl->sensors[i].low_thresh == lvts_ctrl->low_thresh) {
/*
* The minimum threshold needs to be configured in the
* OFFSETL register to get working interrupts , but we
* don ' t actually want to generate interrupts when
* crossing it .
*/
if (lvts_ctrl->low_thresh == -INT_MAX) {
value &= ~low_offset_inten_masks[i];
value |= high_offset_inten_masks[i];
} else {
value |= low_offset_inten_masks[i] | high_offset_inten_masks[i];
}
} else {
value &= ~(low_offset_inten_masks[i] | high_offset_inten_masks[i]);
}
}
writel(value, LVTS_MONINT(lvts_ctrl->base));
}
static bool lvts_should_update_thresh(struct lvts_ctrl *lvts_ctrl, int high)
{
int i;
if (high > lvts_ctrl->high_thresh)
return true ;
lvts_for_each_valid_sensor(i, lvts_ctrl)
if (lvts_ctrl->sensors[i].high_thresh == lvts_ctrl->high_thresh
&& lvts_ctrl->sensors[i].low_thresh == lvts_ctrl->low_thresh)
return false ;
return true ;
}
static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high)
{
struct lvts_sensor *lvts_sensor = thermal_zone_device_priv(tz);
struct lvts_ctrl *lvts_ctrl = container_of(lvts_sensor, struct lvts_ctrl,
sensors[lvts_sensor->id]);
const struct lvts_data *lvts_data = lvts_ctrl->lvts_data;
void __iomem *base = lvts_sensor->base;
u32 raw_low = lvts_temp_to_raw(low != -INT_MAX ? low : LVTS_MINIMUM_THRESHOLD,
lvts_data->temp_factor);
u32 raw_high = lvts_temp_to_raw(high, lvts_data->temp_factor);
bool should_update_thresh;
lvts_sensor->low_thresh = low;
lvts_sensor->high_thresh = high;
should_update_thresh = lvts_should_update_thresh(lvts_ctrl, high);
if (should_update_thresh) {
lvts_ctrl->high_thresh = high;
lvts_ctrl->low_thresh = low;
}
lvts_update_irq_mask(lvts_ctrl);
if (!should_update_thresh)
return 0 ;
/*
* Low offset temperature threshold
*
* LVTS_OFFSETL
*
* Bits :
*
* 14 - 0 : Raw temperature for threshold
*/
pr_debug("%s: Setting low limit temperature interrupt: %d\n" ,
thermal_zone_device_type(tz), low);
writel(raw_low, LVTS_OFFSETL(base));
/*
* High offset temperature threshold
*
* LVTS_OFFSETH
*
* Bits :
*
* 14 - 0 : Raw temperature for threshold
*/
pr_debug("%s: Setting high limit temperature interrupt: %d\n" ,
thermal_zone_device_type(tz), high);
writel(raw_high, LVTS_OFFSETH(base));
return 0 ;
}
static irqreturn_t lvts_ctrl_irq_handler(struct lvts_ctrl *lvts_ctrl)
{
irqreturn_t iret = IRQ_NONE;
u32 value;
static const u32 masks[] = {
LVTS_INT_SENSOR0,
LVTS_INT_SENSOR1,
LVTS_INT_SENSOR2,
LVTS_INT_SENSOR3
};
int i;
/*
* Interrupt monitoring status
*
* LVTS_MONINTST
*
* Bits :
*
* 31 : Interrupt for stage 3
* 30 : Interrupt for stage 2
* 29 : Interrupt for state 1
* 28 : Interrupt using filter on sensor 3
*
* 27 : Interrupt using immediate on sensor 3
* 26 : Interrupt normal to hot on sensor 3
* 25 : Interrupt high offset on sensor 3
* 24 : Interrupt low offset on sensor 3
*
* 23 : Interrupt hot threshold on sensor 3
* 22 : Interrupt cold threshold on sensor 3
* 21 : Interrupt using filter on sensor 2
* 20 : Interrupt using filter on sensor 1
*
* 19 : Interrupt using filter on sensor 0
* 18 : Interrupt using immediate on sensor 2
* 17 : Interrupt using immediate on sensor 1
* 16 : Interrupt using immediate on sensor 0
*
* 15 : Interrupt device access timeout interrupt
* 14 : Interrupt normal to hot on sensor 2
* 13 : Interrupt high offset interrupt on sensor 2
* 12 : Interrupt low offset interrupt on sensor 2
*
* 11 : Interrupt hot threshold on sensor 2
* 10 : Interrupt cold threshold on sensor 2
* 9 : Interrupt normal to hot on sensor 1
* 8 : Interrupt high offset interrupt on sensor 1
*
* 7 : Interrupt low offset interrupt on sensor 1
* 6 : Interrupt hot threshold on sensor 1
* 5 : Interrupt cold threshold on sensor 1
* 4 : Interrupt normal to hot on sensor 0
*
* 3 : Interrupt high offset interrupt on sensor 0
* 2 : Interrupt low offset interrupt on sensor 0
* 1 : Interrupt hot threshold on sensor 0
* 0 : Interrupt cold threshold on sensor 0
*
* We are interested in the sensor ( s ) responsible of the
* interrupt event . We update the thermal framework with the
* thermal zone associated with the sensor . The framework will
* take care of the rest whatever the kind of interrupt , we
* are only interested in which sensor raised the interrupt .
*
* sensor 3 interrupt : 0001 1111 1100 0000 0000 0000 0000 0000
* = > 0 x1FC00000
* sensor 2 interrupt : 0000 0000 0010 0100 0111 1100 0000 0000
* = > 0 x00247C00
* sensor 1 interrupt : 0000 0000 0001 0010 0000 0011 1110 0000
* = > 0 X001203E0
* sensor 0 interrupt : 0000 0000 0000 1001 0000 0000 0001 1111
* = > 0 x0009001F
*/
value = readl(LVTS_MONINTSTS(lvts_ctrl->base));
/*
* Let ' s figure out which sensors raised the interrupt
*
* NOTE : the masks array must be ordered with the index
* corresponding to the sensor id eg . index = 0 , mask for
* sensor0 .
*/
for (i = 0 ; i < ARRAY_SIZE(masks); i++) {
if (!(value & masks[i]))
continue ;
thermal_zone_device_update(lvts_ctrl->sensors[i].tz,
THERMAL_TRIP_VIOLATED);
iret = IRQ_HANDLED;
}
/*
* Write back to clear the interrupt status ( W1C )
*/
writel(value, LVTS_MONINTSTS(lvts_ctrl->base));
return iret;
}
/*
* Temperature interrupt handler . Even if the driver supports more
* interrupt modes , we use the interrupt when the temperature crosses
* the hot threshold the way up and the way down ( modulo the
* hysteresis ) .
*
* Each thermal domain has a couple of interrupts , one for hardware
* reset and another one for all the thermal events happening on the
* different sensors .
*
* The interrupt is configured for thermal events when crossing the
* hot temperature limit . At each interrupt , we check in every
* controller if there is an interrupt pending .
*/
static irqreturn_t lvts_irq_handler(int irq, void *data)
{
struct lvts_domain *lvts_td = data;
irqreturn_t aux, iret = IRQ_NONE;
int i;
for (i = 0 ; i < lvts_td->num_lvts_ctrl; i++) {
aux = lvts_ctrl_irq_handler(&lvts_td->lvts_ctrl[i]);
if (aux != IRQ_HANDLED)
continue ;
iret = IRQ_HANDLED;
}
return iret;
}
static const struct thermal_zone_device_ops lvts_ops = {
.get_temp = lvts_get_temp,
.set_trips = lvts_set_trips,
};
static int lvts_sensor_init(struct device *dev, struct lvts_ctrl *lvts_ctrl,
const struct lvts_ctrl_data *lvts_ctrl_data)
{
struct lvts_sensor *lvts_sensor = lvts_ctrl->sensors;
void __iomem *msr_regs[] = {
LVTS_MSR0(lvts_ctrl->base),
LVTS_MSR1(lvts_ctrl->base),
LVTS_MSR2(lvts_ctrl->base),
LVTS_MSR3(lvts_ctrl->base)
};
void __iomem *imm_regs[] = {
LVTS_IMMD0(lvts_ctrl->base),
LVTS_IMMD1(lvts_ctrl->base),
LVTS_IMMD2(lvts_ctrl->base),
LVTS_IMMD3(lvts_ctrl->base)
};
int i;
lvts_for_each_valid_sensor(i, lvts_ctrl_data) {
int dt_id = lvts_ctrl_data->lvts_sensor[i].dt_id;
/*
* At this point , we don ' t know which id matches which
* sensor . Let ' s set arbitrally the id from the index .
*/
lvts_sensor[i].id = i;
/*
* The thermal zone registration will set the trip
* point interrupt in the thermal controller
* register . But this one will be reset in the
* initialization after . So we need to post pone the
* thermal zone creation after the controller is
* setup . For this reason , we store the device tree
* node id from the data in the sensor structure
*/
lvts_sensor[i].dt_id = dt_id;
/*
* We assign the base address of the thermal
* controller as a back pointer . So it will be
* accessible from the different thermal framework ops
* as we pass the lvts_sensor pointer as thermal zone
* private data .
*/
lvts_sensor[i].base = lvts_ctrl->base;
/*
* Each sensor has its own register address to read from .
*/
lvts_sensor[i].msr = lvts_ctrl_data->mode == LVTS_MSR_IMMEDIATE_MODE ?
imm_regs[i] : msr_regs[i];
lvts_sensor[i].low_thresh = INT_MIN;
lvts_sensor[i].high_thresh = INT_MIN;
};
lvts_ctrl->valid_sensor_mask = lvts_ctrl_data->valid_sensor_mask;
return 0 ;
}
/*
* The efuse blob values follows the sensor enumeration per thermal
* controller . The decoding of the stream is as follow :
*
* MT8192 :
* Stream index map for MCU Domain mt8192 :
*
* < - - - - - mcu - tc # 0 - - - - - > < - - - - - sensor # 0 - - - - - > < - - - - - sensor # 1 - - - - - >
* 0 x01 | 0 x02 | 0 x03 | 0 x04 | 0 x05 | 0 x06 | 0 x07 | 0 x08 | 0 x09 | 0 x0A | 0 x0B
*
* < - - - - - sensor # 2 - - - - - > < - - - - - sensor # 3 - - - - - >
* 0 x0C | 0 x0D | 0 x0E | 0 x0F | 0 x10 | 0 x11 | 0 x12 | 0 x13
*
* < - - - - - sensor # 4 - - - - - > < - - - - - sensor # 5 - - - - - > < - - - - - sensor # 6 - - - - - > < - - - - - sensor # 7 - - - - - >
* 0 x14 | 0 x15 | 0 x16 | 0 x17 | 0 x18 | 0 x19 | 0 x1A | 0 x1B | 0 x1C | 0 x1D | 0 x1E | 0 x1F | 0 x20 | 0 x21 | 0 x22 | 0 x23
*
* Stream index map for AP Domain mt8192 :
*
* < - - - - - sensor # 0 - - - - - > < - - - - - sensor # 1 - - - - - >
* 0 x24 | 0 x25 | 0 x26 | 0 x27 | 0 x28 | 0 x29 | 0 x2A | 0 x2B
*
* < - - - - - sensor # 2 - - - - - > < - - - - - sensor # 3 - - - - - >
* 0 x2C | 0 x2D | 0 x2E | 0 x2F | 0 x30 | 0 x31 | 0 x32 | 0 x33
*
* < - - - - - sensor # 4 - - - - - > < - - - - - sensor # 5 - - - - - >
* 0 x34 | 0 x35 | 0 x36 | 0 x37 | 0 x38 | 0 x39 | 0 x3A | 0 x3B
*
* < - - - - - sensor # 6 - - - - - > < - - - - - sensor # 7 - - - - - > < - - - - - sensor # 8 - - - - - >
* 0 x3C | 0 x3D | 0 x3E | 0 x3F | 0 x40 | 0 x41 | 0 x42 | 0 x43 | 0 x44 | 0 x45 | 0 x46 | 0 x47
*
* MT8195 :
* Stream index map for MCU Domain mt8195 :
*
* < - - - - - mcu - tc # 0 - - - - - > < - - - - - sensor # 0 - - - - - > < - - - - - sensor # 1 - - - - - >
* 0 x01 | 0 x02 | 0 x03 | 0 x04 | 0 x05 | 0 x06 | 0 x07 | 0 x08 | 0 x09
*
* < - - - - - mcu - tc # 1 - - - - - > < - - - - - sensor # 2 - - - - - > < - - - - - sensor # 3 - - - - - >
* 0 x0A | 0 x0B | 0 x0C | 0 x0D | 0 x0E | 0 x0F | 0 x10 | 0 x11 | 0 x12
*
* < - - - - - mcu - tc # 2 - - - - - > < - - - - - sensor # 4 - - - - - > < - - - - - sensor # 5 - - - - - > < - - - - - sensor # 6 - - - - - > < - - - - - sensor # 7 - - - - - >
* 0 x13 | 0 x14 | 0 x15 | 0 x16 | 0 x17 | 0 x18 | 0 x19 | 0 x1A | 0 x1B | 0 x1C | 0 x1D | 0 x1E | 0 x1F | 0 x20 | 0 x21
*
* Stream index map for AP Domain mt8195 :
*
* < - - - - - ap - - tc # 0 - - - - - > < - - - - - sensor # 0 - - - - - > < - - - - - sensor # 1 - - - - - >
* 0 x22 | 0 x23 | 0 x24 | 0 x25 | 0 x26 | 0 x27 | 0 x28 | 0 x29 | 0 x2A
*
* < - - - - - ap - - tc # 1 - - - - - > < - - - - - sensor # 2 - - - - - > < - - - - - sensor # 3 - - - - - >
* 0 x2B | 0 x2C | 0 x2D | 0 x2E | 0 x2F | 0 x30 | 0 x31 | 0 x32 | 0 x33
*
* < - - - - - ap - - tc # 2 - - - - - > < - - - - - sensor # 4 - - - - - > < - - - - - sensor # 5 - - - - - > < - - - - - sensor # 6 - - - - - >
* 0 x34 | 0 x35 | 0 x36 | 0 x37 | 0 x38 | 0 x39 | 0 x3A | 0 x3B | 0 x3C | 0 x3D | 0 x3E | 0 x3F
*
* < - - - - - ap - - tc # 3 - - - - - > < - - - - - sensor # 7 - - - - - > < - - - - - sensor # 8 - - - - - >
* 0 x40 | 0 x41 | 0 x42 | 0 x43 | 0 x44 | 0 x45 | 0 x46 | 0 x47 | 0 x48
*
* Note : In some cases , values don ' t strictly follow a little endian ordering .
* The data description gives byte offsets constituting each calibration value
* for each sensor .
*/
static int lvts_calibration_init(struct device *dev, struct lvts_ctrl *lvts_ctrl,
const struct lvts_ctrl_data *lvts_ctrl_data,
u8 *efuse_calibration,
size_t calib_len)
{
int i;
u32 gt;
/* A zero value for gt means that device has invalid efuse data */
gt = (((u32 *)efuse_calibration)[0 ] >> lvts_ctrl->lvts_data->gt_calib_bit_offset) & 0 xff;
lvts_for_each_valid_sensor(i, lvts_ctrl_data) {
const struct lvts_sensor_data *sensor =
&lvts_ctrl_data->lvts_sensor[i];
if (sensor->cal_offsets[0 ] >= calib_len ||
sensor->cal_offsets[1 ] >= calib_len ||
sensor->cal_offsets[2 ] >= calib_len)
return -EINVAL;
if (gt) {
lvts_ctrl->calibration[i] =
(efuse_calibration[sensor->cal_offsets[0 ]] << 0 ) +
(efuse_calibration[sensor->cal_offsets[1 ]] << 8 ) +
(efuse_calibration[sensor->cal_offsets[2 ]] << 16 );
} else if (lvts_ctrl->lvts_data->def_calibration) {
lvts_ctrl->calibration[i] = lvts_ctrl->lvts_data->def_calibration;
} else {
dev_err(dev, "efuse contains invalid calibration data and no default given.\n" );
return -ENODATA;
}
}
return 0 ;
}
/*
* The efuse bytes stream can be split into different chunk of
* nvmems . This function reads and concatenate those into a single
* buffer so it can be read sequentially when initializing the
* calibration data .
*/
static int lvts_calibration_read(struct device *dev, struct lvts_domain *lvts_td,
const struct lvts_data *lvts_data)
{
struct device_node *np = dev_of_node(dev);
struct nvmem_cell *cell;
struct property *prop;
const char *cell_name;
of_property_for_each_string(np, "nvmem-cell-names" , prop, cell_name) {
size_t len;
u8 *efuse;
cell = of_nvmem_cell_get(np, cell_name);
if (IS_ERR(cell)) {
dev_err(dev, "Failed to get cell '%s'\n" , cell_name);
return PTR_ERR(cell);
}
efuse = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR(efuse)) {
dev_err(dev, "Failed to read cell '%s'\n" , cell_name);
return PTR_ERR(efuse);
}
lvts_td->calib = devm_krealloc(dev, lvts_td->calib,
lvts_td->calib_len + len, GFP_KERNEL);
if (!lvts_td->calib) {
kfree(efuse);
return -ENOMEM;
}
memcpy(lvts_td->calib + lvts_td->calib_len, efuse, len);
lvts_td->calib_len += len;
kfree(efuse);
}
return 0 ;
}
static int lvts_golden_temp_init(struct device *dev, u8 *calib,
const struct lvts_data *lvts_data)
{
u32 gt;
/*
* The golden temp information is contained in the first 32 - bit
* word of efuse data at a specific bit offset .
*/
gt = (((u32 *)calib)[0 ] >> lvts_data->gt_calib_bit_offset) & 0 xff;
/* A zero value for gt means that device has invalid efuse data */
if (gt && gt < LVTS_GOLDEN_TEMP_MAX)
golden_temp = gt;
golden_temp_offset = golden_temp * 500 + lvts_data->temp_offset;
dev_info(dev, "%sgolden temp=%d\n" , gt ? "" : "fake " , golden_temp);
return 0 ;
}
static int lvts_ctrl_init(struct device *dev, struct lvts_domain *lvts_td,
const struct lvts_data *lvts_data)
{
size_t size = sizeof (*lvts_td->lvts_ctrl) * lvts_data->num_lvts_ctrl;
struct lvts_ctrl *lvts_ctrl;
int i, ret;
/*
* Create the calibration bytes stream from efuse data
*/
ret = lvts_calibration_read(dev, lvts_td, lvts_data);
if (ret)
return ret;
ret = lvts_golden_temp_init(dev, lvts_td->calib, lvts_data);
if (ret)
return ret;
lvts_ctrl = devm_kzalloc(dev, size, GFP_KERNEL);
if (!lvts_ctrl)
return -ENOMEM;
for (i = 0 ; i < lvts_data->num_lvts_ctrl; i++) {
lvts_ctrl[i].base = lvts_td->base + lvts_data->lvts_ctrl[i].offset;
lvts_ctrl[i].lvts_data = lvts_data;
ret = lvts_sensor_init(dev, &lvts_ctrl[i],
&lvts_data->lvts_ctrl[i]);
if (ret)
return ret;
ret = lvts_calibration_init(dev, &lvts_ctrl[i],
&lvts_data->lvts_ctrl[i],
lvts_td->calib,
lvts_td->calib_len);
if (ret)
return ret;
/*
* The mode the ctrl will use to read the temperature
* ( filtered or immediate )
*/
lvts_ctrl[i].mode = lvts_data->lvts_ctrl[i].mode;
lvts_ctrl[i].low_thresh = INT_MIN;
lvts_ctrl[i].high_thresh = INT_MIN;
}
/*
* We no longer need the efuse bytes stream , let ' s free it
*/
devm_kfree(dev, lvts_td->calib);
lvts_td->lvts_ctrl = lvts_ctrl;
lvts_td->num_lvts_ctrl = lvts_data->num_lvts_ctrl;
return 0 ;
}
static void lvts_ctrl_monitor_enable(struct device *dev, struct lvts_ctrl *lvts_ctrl, bool enable)
{
/*
* Bitmaps to enable each sensor on filtered mode in the MONCTL0
* register .
*/
static const u8 sensor_filt_bitmap[] = { BIT(0 ), BIT(1 ), BIT(2 ), BIT(3 ) };
u32 sensor_map = 0 ;
int i;
if (lvts_ctrl->mode != LVTS_MSR_FILTERED_MODE)
return ;
if (enable) {
lvts_for_each_valid_sensor(i, lvts_ctrl)
sensor_map |= sensor_filt_bitmap[i];
}
/*
* Bits :
* 9 : Single point access flow
* 0 - 3 : Enable sensing point 0 - 3
*/
writel(sensor_map | BIT(9 ), LVTS_MONCTL0(lvts_ctrl->base));
}
/*
* At this point the configuration register is the only place in the
* driver where we write multiple values . Per hardware constraint ,
* each write in the configuration register must be separated by a
* delay of 2 us .
*/
static void lvts_write_config(struct lvts_ctrl *lvts_ctrl, const u32 *cmds, int nr_cmds)
{
int i;
/*
* Configuration register
*/
for (i = 0 ; i < nr_cmds; i++) {
writel(cmds[i], LVTS_CONFIG(lvts_ctrl->base));
usleep_range(2 , 4 );
}
}
static int lvts_irq_init(struct lvts_ctrl *lvts_ctrl)
{
/*
* LVTS_PROTCTL : Thermal Protection Sensor Selection
*
* Bits :
*
* 19 - 18 : Sensor to base the protection on
* 17 - 16 : Strategy :
* 00 : Average of 4 sensors
* 01 : Max of 4 sensors
* 10 : Selected sensor with bits 19 - 18
* 11 : Reserved
*/
/*
* LVTS_PROTTA : Stage 1 temperature threshold
* LVTS_PROTTB : Stage 2 temperature threshold
* LVTS_PROTTC : Stage 3 temperature threshold
*
* Bits :
*
* 14 - 0 : Raw temperature threshold
*
* writel ( 0 x0 , LVTS_PROTTA ( lvts_ctrl - > base ) ) ;
* writel ( 0 x0 , LVTS_PROTTB ( lvts_ctrl - > base ) ) ;
* writel ( 0 x0 , LVTS_PROTTC ( lvts_ctrl - > base ) ) ;
*/
/*
* LVTS_MONINT : Interrupt configuration register
*
* The LVTS_MONINT register layout is the same as the LVTS_MONINTSTS
* register , except we set the bits to enable the interrupt .
*/
writel(0 , LVTS_MONINT(lvts_ctrl->base));
return 0 ;
}
static int lvts_domain_reset(struct device *dev, struct reset_control *reset)
{
int ret;
ret = reset_control_assert(reset);
if (ret)
return ret;
return reset_control_deassert(reset);
}
/*
* Enable or disable the clocks of a specified thermal controller
*/
static int lvts_ctrl_set_enable(struct lvts_ctrl *lvts_ctrl, int enable)
{
/*
* LVTS_CLKEN : Internal LVTS clock
*
* Bits :
*
* 0 : enable / disable clock
*/
writel(enable, LVTS_CLKEN(lvts_ctrl->base));
return 0 ;
}
static int lvts_ctrl_connect(struct device *dev, struct lvts_ctrl *lvts_ctrl)
{
const struct lvts_data *lvts_data = lvts_ctrl->lvts_data;
u32 id;
lvts_write_config(lvts_ctrl, lvts_data->conn_cmd, lvts_data->num_conn_cmd);
/*
* LVTS_ID : Get ID and status of the thermal controller
*
* Bits :
*
* 0 - 5 : thermal controller id
* 7 : thermal controller connection is valid
*/
id = readl(LVTS_ID(lvts_ctrl->base));
if (!(id & BIT(7 )))
return -EIO;
return 0 ;
}
static int lvts_ctrl_initialize(struct device *dev, struct lvts_ctrl *lvts_ctrl)
{
const struct lvts_data *lvts_data = lvts_ctrl->lvts_data;
lvts_write_config(lvts_ctrl, lvts_data->init_cmd, lvts_data->num_init_cmd);
return 0 ;
}
static int lvts_ctrl_calibrate(struct device *dev, struct lvts_ctrl *lvts_ctrl)
{
int i;
void __iomem *lvts_edata[] = {
LVTS_EDATA00(lvts_ctrl->base),
LVTS_EDATA01(lvts_ctrl->base),
LVTS_EDATA02(lvts_ctrl->base),
LVTS_EDATA03(lvts_ctrl->base)
};
/*
* LVTS_EDATA0X : Efuse calibration reference value for sensor X
*
* Bits :
*
* 20 - 0 : Efuse value for normalization data
*/
for (i = 0 ; i < LVTS_SENSOR_MAX; i++)
writel(lvts_ctrl->calibration[i], lvts_edata[i]);
return 0 ;
}
static int lvts_ctrl_configure(struct device *dev, struct lvts_ctrl *lvts_ctrl)
{
u32 value;
/*
* LVTS_TSSEL : Sensing point index numbering
*
* Bits :
*
* 31 - 24 : ADC Sense 3
* 23 - 16 : ADC Sense 2
* 15 - 8 : ADC Sense 1
* 7 - 0 : ADC Sense 0
*/
value = LVTS_TSSEL_CONF;
writel(value, LVTS_TSSEL(lvts_ctrl->base));
/*
* LVTS_CALSCALE : ADC voltage round
*/
value = 0 x300;
value = LVTS_CALSCALE_CONF;
/*
* LVTS_MSRCTL0 : Sensor filtering strategy
*
* Filters :
*
* 000 : One sample
* 001 : Avg 2 samples
* 010 : 4 samples , drop min and max , avg 2 samples
* 011 : 6 samples , drop min and max , avg 4 samples
* 100 : 10 samples , drop min and max , avg 8 samples
* 101 : 18 samples , drop min and max , avg 16 samples
*
* Bits :
*
* 0 - 2 : Sensor0 filter
* 3 - 5 : Sensor1 filter
* 6 - 8 : Sensor2 filter
* 9 - 11 : Sensor3 filter
*/
value = LVTS_HW_FILTER << 9 | LVTS_HW_FILTER << 6 |
LVTS_HW_FILTER << 3 | LVTS_HW_FILTER;
writel(value, LVTS_MSRCTL0(lvts_ctrl->base));
/*
* LVTS_MONCTL1 : Period unit and group interval configuration
*
* The clock source of LVTS thermal controller is 26 MHz .
*
* The period unit is a time base for all the interval delays
* specified in the registers . By default we use 12 . The time
* conversion is done by multiplying by 256 and 1 / 26 . 10 ^ 6
*
* An interval delay multiplied by the period unit gives the
* duration in seconds .
*
* - Filter interval delay is a delay between two samples of
* the same sensor .
*
* - Sensor interval delay is a delay between two samples of
* different sensors .
*
* - Group interval delay is a delay between different rounds .
*
* For example :
* If Period unit = C , filter delay = 1 , sensor delay = 2 , group delay = 1 ,
* and two sensors , TS1 and TS2 , are in a LVTS thermal controller
* and then
* Period unit time = C * 1 / 26 M * 256 = 12 * 38 . 46 ns * 256 = 118 . 149 us
* Filter interval delay = 1 * Period unit = 118 . 149 us
* Sensor interval delay = 2 * Period unit = 236 . 298 us
* Group interval delay = 1 * Period unit = 118 . 149 us
*
* TS1 TS1 . . . TS1 TS2 TS2 . . . TS2 TS1 . . .
* < - - > Filter interval delay
* < - - > Sensor interval delay
* < - - > Group interval delay
* Bits :
* 29 - 20 : Group interval
* 16 - 13 : Send a single interrupt when crossing the hot threshold ( 1 )
* or an interrupt everytime the hot threshold is crossed ( 0 )
* 9 - 0 : Period unit
*
*/
value = LVTS_GROUP_INTERVAL << 20 | LVTS_PERIOD_UNIT;
writel(value, LVTS_MONCTL1(lvts_ctrl->base));
/*
* LVTS_MONCTL2 : Filtering and sensor interval
*
* Bits :
*
* 25 - 16 : Interval unit in PERIOD_UNIT between sample on
* the same sensor , filter interval
* 9 - 0 : Interval unit in PERIOD_UNIT between each sensor
*
*/
value = LVTS_FILTER_INTERVAL << 16 | LVTS_SENSOR_INTERVAL;
writel(value, LVTS_MONCTL2(lvts_ctrl->base));
return lvts_irq_init(lvts_ctrl);
}
static int lvts_ctrl_start(struct device *dev, struct lvts_ctrl *lvts_ctrl)
{
struct lvts_sensor *lvts_sensors = lvts_ctrl->sensors;
struct thermal_zone_device *tz;
u32 sensor_map = 0 ;
int i;
/*
* Bitmaps to enable each sensor on immediate and filtered modes , as
* described in MSRCTL1 and MONCTL0 registers below , respectively .
*/
u32 sensor_imm_bitmap[] = { BIT(4 ), BIT(5 ), BIT(6 ), BIT(9 ) };
u32 sensor_filt_bitmap[] = { BIT(0 ), BIT(1 ), BIT(2 ), BIT(3 ) };
u32 *sensor_bitmap = lvts_ctrl->mode == LVTS_MSR_IMMEDIATE_MODE ?
sensor_imm_bitmap : sensor_filt_bitmap;
lvts_for_each_valid_sensor(i, lvts_ctrl) {
int dt_id = lvts_sensors[i].dt_id;
tz = devm_thermal_of_zone_register(dev, dt_id, &lvts_sensors[i],
&lvts_ops);
if (IS_ERR(tz)) {
/*
* This thermal zone is not described in the
* device tree . It is not an error from the
* thermal OF code POV , we just continue .
*/
if (PTR_ERR(tz) == -ENODEV)
continue ;
return PTR_ERR(tz);
}
devm_thermal_add_hwmon_sysfs(dev, tz);
/*
* The thermal zone pointer will be needed in the
* interrupt handler , we store it in the sensor
* structure . The thermal domain structure will be
* passed to the interrupt handler private data as the
* interrupt is shared for all the controller
* belonging to the thermal domain .
*/
lvts_sensors[i].tz = tz;
/*
* This sensor was correctly associated with a thermal
* zone , let ' s set the corresponding bit in the sensor
* map , so we can enable the temperature monitoring in
* the hardware thermal controller .
*/
sensor_map |= sensor_bitmap[i];
}
/*
* The initialization of the thermal zones give us
* which sensor point to enable . If any thermal zone
* was not described in the device tree , it won ' t be
* enabled here in the sensor map .
*/
if (lvts_ctrl->mode == LVTS_MSR_IMMEDIATE_MODE) {
/*
* LVTS_MSRCTL1 : Measurement control
*
* Bits :
*
* 9 : Ignore MSRCTL0 config and do immediate measurement on sensor3
* 6 : Ignore MSRCTL0 config and do immediate measurement on sensor2
* 5 : Ignore MSRCTL0 config and do immediate measurement on sensor1
* 4 : Ignore MSRCTL0 config and do immediate measurement on sensor0
*
* That configuration will ignore the filtering and the delays
* introduced in MONCTL1 and MONCTL2
*/
writel(sensor_map, LVTS_MSRCTL1(lvts_ctrl->base));
} else {
/*
* Bits :
* 9 : Single point access flow
* 0 - 3 : Enable sensing point 0 - 3
*/
writel(sensor_map | BIT(9 ), LVTS_MONCTL0(lvts_ctrl->base));
}
return 0 ;
}
static int lvts_domain_init(struct device *dev, struct lvts_domain *lvts_td,
const struct lvts_data *lvts_data)
{
struct lvts_ctrl *lvts_ctrl;
int i, ret;
ret = lvts_ctrl_init(dev, lvts_td, lvts_data);
if (ret)
return ret;
ret = lvts_domain_reset(dev, lvts_td->reset);
if (ret) {
dev_dbg(dev, "Failed to reset domain" );
return ret;
}
for (i = 0 ; i < lvts_td->num_lvts_ctrl; i++) {
lvts_ctrl = &lvts_td->lvts_ctrl[i];
/*
* Initialization steps :
*
* - Enable the clock
* - Connect to the LVTS
* - Initialize the LVTS
* - Prepare the calibration data
* - Select monitored sensors
* [ Configure sampling ]
* [ Configure the interrupt ]
* - Start measurement
*/
ret = lvts_ctrl_set_enable(lvts_ctrl, true );
if (ret) {
dev_dbg(dev, "Failed to enable LVTS clock" );
return ret;
}
ret = lvts_ctrl_connect(dev, lvts_ctrl);
if (ret) {
dev_dbg(dev, "Failed to connect to LVTS controller" );
return ret;
}
ret = lvts_ctrl_initialize(dev, lvts_ctrl);
if (ret) {
dev_dbg(dev, "Failed to initialize controller" );
return ret;
}
ret = lvts_ctrl_calibrate(dev, lvts_ctrl);
if (ret) {
dev_dbg(dev, "Failed to calibrate controller" );
return ret;
}
ret = lvts_ctrl_configure(dev, lvts_ctrl);
if (ret) {
dev_dbg(dev, "Failed to configure controller" );
return ret;
}
ret = lvts_ctrl_start(dev, lvts_ctrl);
if (ret) {
dev_dbg(dev, "Failed to start controller" );
return ret;
}
}
return lvts_debugfs_init(dev, lvts_td);
}
static int lvts_probe(struct platform_device *pdev)
{
const struct lvts_data *lvts_data;
struct lvts_domain *lvts_td;
struct device *dev = &pdev->dev;
struct resource *res;
int irq, ret;
lvts_td = devm_kzalloc(dev, sizeof (*lvts_td), GFP_KERNEL);
if (!lvts_td)
return -ENOMEM;
lvts_data = of_device_get_match_data(dev);
if (!lvts_data)
return -ENODEV;
lvts_td->clk = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(lvts_td->clk))
return dev_err_probe(dev, PTR_ERR(lvts_td->clk), "Failed to retrieve clock\n" );
res = platform_get_mem_or_io(pdev, 0 );
if (!res)
return dev_err_probe(dev, (-ENXIO), "No IO resource\n" );
lvts_td->base = devm_platform_get_and_ioremap_resource(pdev, 0 , &res);
if (IS_ERR(lvts_td->base))
return dev_err_probe(dev, PTR_ERR(lvts_td->base), "Failed to map io resource\n" );
lvts_td->reset = devm_reset_control_get_by_index(dev, 0 );
if (IS_ERR(lvts_td->reset))
return dev_err_probe(dev, PTR_ERR(lvts_td->reset), "Failed to get reset control\n" );
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return irq;
golden_temp_offset = lvts_data->temp_offset;
ret = lvts_domain_init(dev, lvts_td, lvts_data);
if (ret)
return dev_err_probe(dev, ret, "Failed to initialize the lvts domain\n" );
/*
* At this point the LVTS is initialized and enabled . We can
* safely enable the interrupt .
*/
ret = devm_request_threaded_irq(dev, irq, NULL, lvts_irq_handler,
IRQF_ONESHOT, dev_name(dev), lvts_td);
if (ret)
return dev_err_probe(dev, ret, "Failed to request interrupt\n" );
platform_set_drvdata(pdev, lvts_td);
return 0 ;
}
static void lvts_remove(struct platform_device *pdev)
{
struct lvts_domain *lvts_td;
int i;
lvts_td = platform_get_drvdata(pdev);
for (i = 0 ; i < lvts_td->num_lvts_ctrl; i++)
lvts_ctrl_set_enable(&lvts_td->lvts_ctrl[i], false );
}
static const struct lvts_ctrl_data mt7988_lvts_ap_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT7988_CPU_0,
.cal_offsets = { 0 x00, 0 x01, 0 x02 } },
{ .dt_id = MT7988_CPU_1,
.cal_offsets = { 0 x04, 0 x05, 0 x06 } },
{ .dt_id = MT7988_ETH2P5G_0,
.cal_offsets = { 0 x08, 0 x09, 0 x0a } },
{ .dt_id = MT7988_ETH2P5G_1,
.cal_offsets = { 0 x0c, 0 x0d, 0 x0e } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 1 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT7988_TOPS_0,
.cal_offsets = { 0 x14, 0 x15, 0 x16 } },
{ .dt_id = MT7988_TOPS_1,
.cal_offsets = { 0 x18, 0 x19, 0 x1a } },
{ .dt_id = MT7988_ETHWARP_0,
.cal_offsets = { 0 x1c, 0 x1d, 0 x1e } },
{ .dt_id = MT7988_ETHWARP_1,
.cal_offsets = { 0 x20, 0 x21, 0 x22 } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 1 ),
.offset = 0 x100,
}
};
static int lvts_suspend(struct device *dev)
{
struct lvts_domain *lvts_td;
int i;
lvts_td = dev_get_drvdata(dev);
for (i = 0 ; i < lvts_td->num_lvts_ctrl; i++) {
lvts_ctrl_monitor_enable(dev, &lvts_td->lvts_ctrl[i], false );
usleep_range(100 , 200 );
lvts_ctrl_set_enable(&lvts_td->lvts_ctrl[i], false );
}
clk_disable_unprepare(lvts_td->clk);
return 0 ;
}
static int lvts_resume(struct device *dev)
{
struct lvts_domain *lvts_td;
int i, ret;
lvts_td = dev_get_drvdata(dev);
ret = clk_prepare_enable(lvts_td->clk);
if (ret)
return ret;
for (i = 0 ; i < lvts_td->num_lvts_ctrl; i++) {
lvts_ctrl_set_enable(&lvts_td->lvts_ctrl[i], true );
usleep_range(100 , 200 );
lvts_ctrl_monitor_enable(dev, &lvts_td->lvts_ctrl[i], true );
}
return 0 ;
}
static const u32 default_conn_cmds[] = { 0 xC103FFFF, 0 xC502FF55 };
static const u32 mt7988_conn_cmds[] = { 0 xC103FFFF, 0 xC502FC55 };
/*
* Write device mask : 0 xC1030000
*/
static const u32 default_init_cmds[] = {
0 xC1030E01, 0 xC1030CFC, 0 xC1030A8C, 0 xC103098D, 0 xC10308F1,
0 xC10307A6, 0 xC10306B8, 0 xC1030500, 0 xC1030420, 0 xC1030300,
0 xC1030030, 0 xC10300F6, 0 xC1030050, 0 xC1030060, 0 xC10300AC,
0 xC10300FC, 0 xC103009D, 0 xC10300F1, 0 xC10300E1
};
static const u32 mt7988_init_cmds[] = {
0 xC1030300, 0 xC1030420, 0 xC1030500, 0 xC10307A6, 0 xC1030CFC,
0 xC1030A8C, 0 xC103098D, 0 xC10308F1, 0 xC1030B04, 0 xC1030E01,
0 xC10306B8
};
/*
* The MT8186 calibration data is stored as packed 3 - byte little - endian
* values using a weird layout that makes sense only when viewed as a 32 - bit
* hexadecimal word dump . Let ' s suppose SxBy where x = sensor number and
* y = byte number where the LSB is y = 0 . We then have :
*
* [ S0B2 - S0B1 - S0B0 - S1B2 ] [ S1B1 - S1B0 - S2B2 - S2B1 ] [ S2B0 - S3B2 - S3B1 - S3B0 ]
*
* However , when considering a byte stream , those appear as follows :
*
* [ S1B2 ] [ S0B0 [ [ S0B1 ] [ S0B2 ] [ S2B1 ] [ S2B2 ] [ S1B0 ] [ S1B1 ] [ S3B0 ] [ S3B1 ] [ S3B2 ] [ S2B0 ]
*
* Hence the rather confusing offsets provided below .
*/
static const struct lvts_ctrl_data mt8186_lvts_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT8186_LITTLE_CPU0,
.cal_offsets = { 5 , 6 , 7 } },
{ .dt_id = MT8186_LITTLE_CPU1,
.cal_offsets = { 10 , 11 , 4 } },
{ .dt_id = MT8186_LITTLE_CPU2,
.cal_offsets = { 15 , 8 , 9 } },
{ .dt_id = MT8186_CAM,
.cal_offsets = { 12 , 13 , 14 } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 1 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT8186_BIG_CPU0,
.cal_offsets = { 22 , 23 , 16 } },
{ .dt_id = MT8186_BIG_CPU1,
.cal_offsets = { 27 , 20 , 21 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x100,
},
{
.lvts_sensor = {
{ .dt_id = MT8186_NNA,
.cal_offsets = { 29 , 30 , 31 } },
{ .dt_id = MT8186_ADSP,
.cal_offsets = { 34 , 35 , 28 } },
{ .dt_id = MT8186_GPU,
.cal_offsets = { 39 , 32 , 33 } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 0 ),
.offset = 0 x200,
}
};
static const struct lvts_ctrl_data mt8188_lvts_mcu_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT8188_MCU_LITTLE_CPU0,
.cal_offsets = { 22 , 23 , 24 } },
{ .dt_id = MT8188_MCU_LITTLE_CPU1,
.cal_offsets = { 25 , 26 , 27 } },
{ .dt_id = MT8188_MCU_LITTLE_CPU2,
.cal_offsets = { 28 , 29 , 30 } },
{ .dt_id = MT8188_MCU_LITTLE_CPU3,
.cal_offsets = { 31 , 32 , 33 } },
},
VALID_SENSOR_MAP(1 , 1 , 1 , 1 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT8188_MCU_BIG_CPU0,
.cal_offsets = { 34 , 35 , 36 } },
{ .dt_id = MT8188_MCU_BIG_CPU1,
.cal_offsets = { 37 , 38 , 39 } },
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x100,
}
};
static const struct lvts_ctrl_data mt8188_lvts_ap_data_ctrl[] = {
{
.lvts_sensor = {
{ /* unused */ },
{ .dt_id = MT8188_AP_APU,
.cal_offsets = { 40 , 41 , 42 } },
},
VALID_SENSOR_MAP(0 , 1 , 0 , 0 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT8188_AP_GPU0,
.cal_offsets = { 43 , 44 , 45 } },
{ .dt_id = MT8188_AP_GPU1,
.cal_offsets = { 46 , 47 , 48 } },
{ .dt_id = MT8188_AP_ADSP,
.cal_offsets = { 49 , 50 , 51 } },
},
VALID_SENSOR_MAP(1 , 1 , 1 , 0 ),
.offset = 0 x100,
},
{
.lvts_sensor = {
{ .dt_id = MT8188_AP_VDO,
.cal_offsets = { 52 , 53 , 54 } },
{ .dt_id = MT8188_AP_INFRA,
.cal_offsets = { 55 , 56 , 57 } },
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x200,
},
{
.lvts_sensor = {
{ .dt_id = MT8188_AP_CAM1,
.cal_offsets = { 58 , 59 , 60 } },
{ .dt_id = MT8188_AP_CAM2,
.cal_offsets = { 61 , 62 , 63 } },
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x300,
}
};
static const struct lvts_ctrl_data mt8192_lvts_mcu_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT8192_MCU_BIG_CPU0,
.cal_offsets = { 0 x04, 0 x05, 0 x06 } },
{ .dt_id = MT8192_MCU_BIG_CPU1,
.cal_offsets = { 0 x08, 0 x09, 0 x0a } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x0,
.mode = LVTS_MSR_FILTERED_MODE,
},
{
.lvts_sensor = {
{ .dt_id = MT8192_MCU_BIG_CPU2,
.cal_offsets = { 0 x0c, 0 x0d, 0 x0e } },
{ .dt_id = MT8192_MCU_BIG_CPU3,
.cal_offsets = { 0 x10, 0 x11, 0 x12 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x100,
.mode = LVTS_MSR_FILTERED_MODE,
},
{
.lvts_sensor = {
{ .dt_id = MT8192_MCU_LITTLE_CPU0,
.cal_offsets = { 0 x14, 0 x15, 0 x16 } },
{ .dt_id = MT8192_MCU_LITTLE_CPU1,
.cal_offsets = { 0 x18, 0 x19, 0 x1a } },
{ .dt_id = MT8192_MCU_LITTLE_CPU2,
.cal_offsets = { 0 x1c, 0 x1d, 0 x1e } },
{ .dt_id = MT8192_MCU_LITTLE_CPU3,
.cal_offsets = { 0 x20, 0 x21, 0 x22 } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 1 ),
.offset = 0 x200,
.mode = LVTS_MSR_FILTERED_MODE,
}
};
static const struct lvts_ctrl_data mt8192_lvts_ap_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT8192_AP_VPU0,
.cal_offsets = { 0 x24, 0 x25, 0 x26 } },
{ .dt_id = MT8192_AP_VPU1,
.cal_offsets = { 0 x28, 0 x29, 0 x2a } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT8192_AP_GPU0,
.cal_offsets = { 0 x2c, 0 x2d, 0 x2e } },
{ .dt_id = MT8192_AP_GPU1,
.cal_offsets = { 0 x30, 0 x31, 0 x32 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x100,
},
{
.lvts_sensor = {
{ .dt_id = MT8192_AP_INFRA,
.cal_offsets = { 0 x34, 0 x35, 0 x36 } },
{ .dt_id = MT8192_AP_CAM,
.cal_offsets = { 0 x38, 0 x39, 0 x3a } },
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x200,
},
{
.lvts_sensor = {
{ .dt_id = MT8192_AP_MD0,
.cal_offsets = { 0 x3c, 0 x3d, 0 x3e } },
{ .dt_id = MT8192_AP_MD1,
.cal_offsets = { 0 x40, 0 x41, 0 x42 } },
{ .dt_id = MT8192_AP_MD2,
.cal_offsets = { 0 x44, 0 x45, 0 x46 } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 0 ),
.offset = 0 x300,
}
};
static const struct lvts_ctrl_data mt8195_lvts_mcu_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT8195_MCU_BIG_CPU0,
.cal_offsets = { 0 x04, 0 x05, 0 x06 } },
{ .dt_id = MT8195_MCU_BIG_CPU1,
.cal_offsets = { 0 x07, 0 x08, 0 x09 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT8195_MCU_BIG_CPU2,
.cal_offsets = { 0 x0d, 0 x0e, 0 x0f } },
{ .dt_id = MT8195_MCU_BIG_CPU3,
.cal_offsets = { 0 x10, 0 x11, 0 x12 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x100,
},
{
.lvts_sensor = {
{ .dt_id = MT8195_MCU_LITTLE_CPU0,
.cal_offsets = { 0 x16, 0 x17, 0 x18 } },
{ .dt_id = MT8195_MCU_LITTLE_CPU1,
.cal_offsets = { 0 x19, 0 x1a, 0 x1b } },
{ .dt_id = MT8195_MCU_LITTLE_CPU2,
.cal_offsets = { 0 x1c, 0 x1d, 0 x1e } },
{ .dt_id = MT8195_MCU_LITTLE_CPU3,
.cal_offsets = { 0 x1f, 0 x20, 0 x21 } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 1 ),
.offset = 0 x200,
}
};
static const struct lvts_ctrl_data mt8195_lvts_ap_data_ctrl[] = {
{
.lvts_sensor = {
{ .dt_id = MT8195_AP_VPU0,
.cal_offsets = { 0 x25, 0 x26, 0 x27 } },
{ .dt_id = MT8195_AP_VPU1,
.cal_offsets = { 0 x28, 0 x29, 0 x2a } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x0,
},
{
.lvts_sensor = {
{ .dt_id = MT8195_AP_GPU0,
.cal_offsets = { 0 x2e, 0 x2f, 0 x30 } },
{ .dt_id = MT8195_AP_GPU1,
.cal_offsets = { 0 x31, 0 x32, 0 x33 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x100,
},
{
.lvts_sensor = {
{ .dt_id = MT8195_AP_VDEC,
.cal_offsets = { 0 x37, 0 x38, 0 x39 } },
{ .dt_id = MT8195_AP_IMG,
.cal_offsets = { 0 x3a, 0 x3b, 0 x3c } },
{ .dt_id = MT8195_AP_INFRA,
.cal_offsets = { 0 x3d, 0 x3e, 0 x3f } }
},
VALID_SENSOR_MAP(1 , 1 , 1 , 0 ),
.offset = 0 x200,
},
{
.lvts_sensor = {
{ .dt_id = MT8195_AP_CAM0,
.cal_offsets = { 0 x43, 0 x44, 0 x45 } },
{ .dt_id = MT8195_AP_CAM1,
.cal_offsets = { 0 x46, 0 x47, 0 x48 } }
},
VALID_SENSOR_MAP(1 , 1 , 0 , 0 ),
.offset = 0 x300,
}
};
static const struct lvts_data mt7988_lvts_ap_data = {
.lvts_ctrl = mt7988_lvts_ap_data_ctrl,
.conn_cmd = mt7988_conn_cmds,
.init_cmd = mt7988_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt7988_lvts_ap_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(mt7988_conn_cmds),
.num_init_cmd = ARRAY_SIZE(mt7988_init_cmds),
.temp_factor = LVTS_COEFF_A_MT7988,
.temp_offset = LVTS_COEFF_B_MT7988,
.gt_calib_bit_offset = 24 ,
};
static const struct lvts_data mt8186_lvts_data = {
.lvts_ctrl = mt8186_lvts_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8186_lvts_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT7988,
.temp_offset = LVTS_COEFF_B_MT7988,
.gt_calib_bit_offset = 24 ,
.def_calibration = 19000 ,
};
static const struct lvts_data mt8188_lvts_mcu_data = {
.lvts_ctrl = mt8188_lvts_mcu_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8188_lvts_mcu_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT8195,
.temp_offset = LVTS_COEFF_B_MT8195,
.gt_calib_bit_offset = 20 ,
.def_calibration = 35000 ,
};
static const struct lvts_data mt8188_lvts_ap_data = {
.lvts_ctrl = mt8188_lvts_ap_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8188_lvts_ap_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT8195,
.temp_offset = LVTS_COEFF_B_MT8195,
.gt_calib_bit_offset = 20 ,
.def_calibration = 35000 ,
};
static const struct lvts_data mt8192_lvts_mcu_data = {
.lvts_ctrl = mt8192_lvts_mcu_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8192_lvts_mcu_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT8195,
.temp_offset = LVTS_COEFF_B_MT8195,
.gt_calib_bit_offset = 24 ,
.def_calibration = 35000 ,
};
static const struct lvts_data mt8192_lvts_ap_data = {
.lvts_ctrl = mt8192_lvts_ap_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8192_lvts_ap_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT8195,
.temp_offset = LVTS_COEFF_B_MT8195,
.gt_calib_bit_offset = 24 ,
.def_calibration = 35000 ,
};
static const struct lvts_data mt8195_lvts_mcu_data = {
.lvts_ctrl = mt8195_lvts_mcu_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8195_lvts_mcu_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT8195,
.temp_offset = LVTS_COEFF_B_MT8195,
.gt_calib_bit_offset = 24 ,
.def_calibration = 35000 ,
};
static const struct lvts_data mt8195_lvts_ap_data = {
.lvts_ctrl = mt8195_lvts_ap_data_ctrl,
.conn_cmd = default_conn_cmds,
.init_cmd = default_init_cmds,
.num_lvts_ctrl = ARRAY_SIZE(mt8195_lvts_ap_data_ctrl),
.num_conn_cmd = ARRAY_SIZE(default_conn_cmds),
.num_init_cmd = ARRAY_SIZE(default_init_cmds),
.temp_factor = LVTS_COEFF_A_MT8195,
.temp_offset = LVTS_COEFF_B_MT8195,
.gt_calib_bit_offset = 24 ,
.def_calibration = 35000 ,
};
static const struct of_device_id lvts_of_match[] = {
{ .compatible = "mediatek,mt7988-lvts-ap" , .data = &mt7988_lvts_ap_data },
{ .compatible = "mediatek,mt8186-lvts" , .data = &mt8186_lvts_data },
{ .compatible = "mediatek,mt8188-lvts-mcu" , .data = &mt8188_lvts_mcu_data },
{ .compatible = "mediatek,mt8188-lvts-ap" , .data = &mt8188_lvts_ap_data },
{ .compatible = "mediatek,mt8192-lvts-mcu" , .data = &mt8192_lvts_mcu_data },
{ .compatible = "mediatek,mt8192-lvts-ap" , .data = &mt8192_lvts_ap_data },
{ .compatible = "mediatek,mt8195-lvts-mcu" , .data = &mt8195_lvts_mcu_data },
{ .compatible = "mediatek,mt8195-lvts-ap" , .data = &mt8195_lvts_ap_data },
{},
};
MODULE_DEVICE_TABLE(of, lvts_of_match);
static const struct dev_pm_ops lvts_pm_ops = {
NOIRQ_SYSTEM_SLEEP_PM_OPS(lvts_suspend, lvts_resume)
};
static struct platform_driver lvts_driver = {
.probe = lvts_probe,
.remove = lvts_remove,
.driver = {
.name = "mtk-lvts-thermal" ,
.of_match_table = lvts_of_match,
.pm = &lvts_pm_ops,
},
};
module_platform_driver(lvts_driver);
MODULE_AUTHOR("Balsam CHIHI <bchihi@baylibre.com>" );
MODULE_DESCRIPTION("MediaTek LVTS Thermal Driver" );
MODULE_LICENSE("GPL" );
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