// SPDX-License-Identifier: GPL-2.0
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/slab.h>
#include <dt-bindings/clock/at91.h>
#include "pmc.h"
static DEFINE_SPINLOCK(rm9200_mck_lock);
struct sck {
char *n;
char *p;
u8 id;
};
struct pck {
char *n;
u8 id;
};
static const struct clk_master_characteristics rm9200_mck_characteristics = {
.output = { .min = 0, .max = 80000000 },
.divisors = { 1, 2, 3, 4 },
};
static u8 rm9200_pll_out[] = { 0, 2 };
static const struct clk_range rm9200_pll_outputs[] = {
{ .min = 80000000, .max = 160000000 },
{ .min = 150000000, .max = 180000000 },
};
static const struct clk_pll_characteristics rm9200_pll_characteristics = {
.input = { .min = 1000000, .max = 32000000 },
.num_output = ARRAY_SIZE(rm9200_pll_outputs),
.output = rm9200_pll_outputs,
.out = rm9200_pll_out,
};
static const struct sck at91rm9200_systemck[] = {
{ .n = "udpck" , .p = "usbck" , .id = 1 },
{ .n = "uhpck" , .p = "usbck" , .id = 4 },
{ .n = "pck0" , .p = "prog0" , .id = 8 },
{ .n = "pck1" , .p = "prog1" , .id = 9 },
{ .n = "pck2" , .p = "prog2" , .id = 10 },
{ .n = "pck3" , .p = "prog3" , .id = 11 },
};
static const struct pck at91rm9200_periphck[] = {
{ .n = "pioA_clk" , .id = 2 },
{ .n = "pioB_clk" , .id = 3 },
{ .n = "pioC_clk" , .id = 4 },
{ .n = "pioD_clk" , .id = 5 },
{ .n = "usart0_clk" , .id = 6 },
{ .n = "usart1_clk" , .id = 7 },
{ .n = "usart2_clk" , .id = 8 },
{ .n = "usart3_clk" , .id = 9 },
{ .n = "mci0_clk" , .id = 10 },
{ .n = "udc_clk" , .id = 11 },
{ .n = "twi0_clk" , .id = 12 },
{ .n = "spi0_clk" , .id = 13 },
{ .n = "ssc0_clk" , .id = 14 },
{ .n = "ssc1_clk" , .id = 15 },
{ .n = "ssc2_clk" , .id = 16 },
{ .n = "tc0_clk" , .id = 17 },
{ .n = "tc1_clk" , .id = 18 },
{ .n = "tc2_clk" , .id = 19 },
{ .n = "tc3_clk" , .id = 20 },
{ .n = "tc4_clk" , .id = 21 },
{ .n = "tc5_clk" , .id = 22 },
{ .n = "ohci_clk" , .id = 23 },
{ .n = "macb0_clk" , .id = 24 },
};
static void __init at91rm9200_pmc_setup(struct device_node *np)
{
const char *slowxtal_name, *mainxtal_name;
struct pmc_data *at91rm9200_pmc;
u32 usb_div[] = { 1, 2, 0, 0 };
const char *parent_names[6];
struct regmap *regmap;
struct clk_hw *hw;
int i;
bool bypass;
i = of_property_match_string(np, "clock-names" , "slow_xtal" );
if (i < 0)
return ;
slowxtal_name = of_clk_get_parent_name(np, i);
i = of_property_match_string(np, "clock-names" , "main_xtal" );
if (i < 0)
return ;
mainxtal_name = of_clk_get_parent_name(np, i);
regmap = device_node_to_regmap(np);
if (IS_ERR(regmap))
return ;
at91rm9200_pmc = pmc_data_allocate(PMC_PLLBCK + 1,
nck(at91rm9200_systemck),
nck(at91rm9200_periphck), 0, 4);
if (!at91rm9200_pmc)
return ;
bypass = of_property_read_bool(np, "atmel,osc-bypass" );
hw = at91_clk_register_main_osc(regmap, "main_osc" , mainxtal_name, NULL,
bypass);
if (IS_ERR(hw))
goto err_free;
hw = at91_clk_register_rm9200_main(regmap, "mainck" , "main_osc" , NULL);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->chws[PMC_MAIN] = hw;
hw = at91_clk_register_pll(regmap, "pllack" , "mainck" , 0,
&at91rm9200_pll_layout,
&rm9200_pll_characteristics);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->chws[PMC_PLLACK] = hw;
hw = at91_clk_register_pll(regmap, "pllbck" , "mainck" , 1,
&at91rm9200_pll_layout,
&rm9200_pll_characteristics);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->chws[PMC_PLLBCK] = hw;
parent_names[0] = slowxtal_name;
parent_names[1] = "mainck" ;
parent_names[2] = "pllack" ;
parent_names[3] = "pllbck" ;
hw = at91_clk_register_master_pres(regmap, "masterck_pres" , 4,
parent_names, NULL,
&at91rm9200_master_layout,
&rm9200_mck_characteristics,
&rm9200_mck_lock);
if (IS_ERR(hw))
goto err_free;
hw = at91_clk_register_master_div(regmap, "masterck_div" ,
"masterck_pres" , NULL,
&at91rm9200_master_layout,
&rm9200_mck_characteristics,
&rm9200_mck_lock, CLK_SET_RATE_GATE, 0);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->chws[PMC_MCK] = hw;
hw = at91rm9200_clk_register_usb(regmap, "usbck" , "pllbck" , usb_div);
if (IS_ERR(hw))
goto err_free;
parent_names[0] = slowxtal_name;
parent_names[1] = "mainck" ;
parent_names[2] = "pllack" ;
parent_names[3] = "pllbck" ;
for (i = 0; i < 4; i++) {
char name[6];
snprintf(name, sizeof (name), "prog%d" , i);
hw = at91_clk_register_programmable(regmap, name,
parent_names, NULL, 4, i,
&at91rm9200_programmable_layout,
NULL);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->pchws[i] = hw;
}
for (i = 0; i < ARRAY_SIZE(at91rm9200_systemck); i++) {
hw = at91_clk_register_system(regmap, at91rm9200_systemck[i].n,
at91rm9200_systemck[i].p, NULL,
at91rm9200_systemck[i].id, 0);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->shws[at91rm9200_systemck[i].id] = hw;
}
for (i = 0; i < ARRAY_SIZE(at91rm9200_periphck); i++) {
hw = at91_clk_register_peripheral(regmap,
at91rm9200_periphck[i].n,
"masterck_div" , NULL,
at91rm9200_periphck[i].id);
if (IS_ERR(hw))
goto err_free;
at91rm9200_pmc->phws[at91rm9200_periphck[i].id] = hw;
}
of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91rm9200_pmc);
return ;
err_free:
kfree(at91rm9200_pmc);
}
/*
* While the TCB can be used as the clocksource, the system timer is most likely
* to be used instead. However, the pinctrl driver doesn't support probe
* deferring properly. Once this is fixed, this can be switched to a platform
* driver.
*/
CLK_OF_DECLARE(at91rm9200_pmc, "atmel,at91rm9200-pmc" , at91rm9200_pmc_setup);
Messung V0.5 C=92 H=91 G=91
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