Quelle  tps65090.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Core driver for TI TPS65090 PMIC family
 *
 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
 *
 * Author: Venu Byravarasu <vbyravarasu@nvidia.com>
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65090.h>
#include <linux/of.h>
#include <linux/err.h>

#define NUM_INT_REG 2

#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE  1
#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE  2
#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE  3
#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
#define TPS65090_INT1_MASK_CHARGING_COMPLETE  5
#define TPS65090_INT1_MASK_OVERLOAD_DCDC1  6
#define TPS65090_INT1_MASK_OVERLOAD_DCDC2  7
#define TPS65090_INT2_MASK_OVERLOAD_DCDC3  0
#define TPS65090_INT2_MASK_OVERLOAD_FET1  1
#define TPS65090_INT2_MASK_OVERLOAD_FET2  2
#define TPS65090_INT2_MASK_OVERLOAD_FET3  3
#define TPS65090_INT2_MASK_OVERLOAD_FET4  4
#define TPS65090_INT2_MASK_OVERLOAD_FET5  5
#define TPS65090_INT2_MASK_OVERLOAD_FET6  6
#define TPS65090_INT2_MASK_OVERLOAD_FET7  7

static const struct resource charger_resources[] = {
 {
  .start  = TPS65090_IRQ_VAC_STATUS_CHANGE,
  .end    = TPS65090_IRQ_VAC_STATUS_CHANGE,
  .flags  = IORESOURCE_IRQ,
 }
};

enum tps65090_cells {
 PMIC = 0,
 CHARGER = 1,
};

static struct mfd_cell tps65090s[] = {
 [PMIC] = {
  .name = "tps65090-pmic",
 },
 [CHARGER] = {
  .name = "tps65090-charger",
  .num_resources = ARRAY_SIZE(charger_resources),
  .resources = &charger_resources[0],
  .of_compatible = "ti,tps65090-charger",
 },
};

static const struct regmap_irq tps65090_irqs[] = {
 /* INT1 IRQs*/
 [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
  .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
 },
 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
  .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
 },
 [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
  .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
 },
 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
  .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
 },
 [TPS65090_IRQ_CHARGING_COMPLETE] = {
  .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
 },
 [TPS65090_IRQ_OVERLOAD_DCDC1] = {
  .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
 },
 [TPS65090_IRQ_OVERLOAD_DCDC2] = {
  .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
 },
 /* INT2 IRQs*/
 [TPS65090_IRQ_OVERLOAD_DCDC3] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
 },
 [TPS65090_IRQ_OVERLOAD_FET1] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
 },
 [TPS65090_IRQ_OVERLOAD_FET2] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
 },
 [TPS65090_IRQ_OVERLOAD_FET3] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
 },
 [TPS65090_IRQ_OVERLOAD_FET4] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
 },
 [TPS65090_IRQ_OVERLOAD_FET5] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
 },
 [TPS65090_IRQ_OVERLOAD_FET6] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
 },
 [TPS65090_IRQ_OVERLOAD_FET7] = {
  .reg_offset = 1,
  .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
 },
};

static const struct regmap_irq_chip tps65090_irq_chip = {
 .name = "tps65090",
 .irqs = tps65090_irqs,
 .num_irqs = ARRAY_SIZE(tps65090_irqs),
 .num_regs = NUM_INT_REG,
 .status_base = TPS65090_REG_INTR_STS,
 .unmask_base = TPS65090_REG_INTR_MASK,
};

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
 /* Nearly all registers have status bits mixed in, except a few */
 switch (reg) {
 case TPS65090_REG_INTR_MASK:
 case TPS65090_REG_INTR_MASK2:
 case TPS65090_REG_CG_CTRL0:
 case TPS65090_REG_CG_CTRL1:
 case TPS65090_REG_CG_CTRL2:
 case TPS65090_REG_CG_CTRL3:
 case TPS65090_REG_CG_CTRL4:
 case TPS65090_REG_CG_CTRL5:
  return false;
 }
 return true;
}

static const struct regmap_config tps65090_regmap_config = {
 .reg_bits = 8,
 .val_bits = 8,
 .max_register = TPS65090_MAX_REG,
 .num_reg_defaults_raw = TPS65090_NUM_REGS,
 .cache_type = REGCACHE_MAPLE,
 .volatile_reg = is_volatile_reg,
};

#ifdef CONFIG_OF
static const struct of_device_id tps65090_of_match[] = {
 { .compatible = "ti,tps65090",},
 {},
};
#endif

static int tps65090_i2c_probe(struct i2c_client *client)
{
 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
 int irq_base = 0;
 struct tps65090 *tps65090;
 int ret;

 if (!pdata && !client->dev.of_node) {
  dev_err(&client->dev,
   "tps65090 requires platform data or of_node\n");
  return -EINVAL;
 }

 if (pdata)
  irq_base = pdata->irq_base;

 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
 if (!tps65090)
  return -ENOMEM;

 tps65090->dev = &client->dev;
 i2c_set_clientdata(client, tps65090);

 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
 if (IS_ERR(tps65090->rmap)) {
  ret = PTR_ERR(tps65090->rmap);
  dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
  return ret;
 }

 if (client->irq) {
  ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
       IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
       &tps65090_irq_chip, &tps65090->irq_data);
  if (ret) {
   dev_err(&client->dev,
    "IRQ init failed with err: %d\n", ret);
   return ret;
  }
 } else {
  /* Don't tell children they have an IRQ that'll never fire */
  tps65090s[CHARGER].num_resources = 0;
 }

 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
         ARRAY_SIZE(tps65090s), NULL,
         0, regmap_irq_get_domain(tps65090->irq_data));
 if (ret) {
  dev_err(&client->dev, "add mfd devices failed with err: %d\n",
   ret);
  goto err_irq_exit;
 }

 return 0;

err_irq_exit:
 if (client->irq)
  regmap_del_irq_chip(client->irq, tps65090->irq_data);
 return ret;
}


static const struct i2c_device_id tps65090_id_table[] = {
 { "tps65090" },
 { }
};

static struct i2c_driver tps65090_driver = {
 .driver = {
  .name = "tps65090",
  .suppress_bind_attrs = true,
  .of_match_table = of_match_ptr(tps65090_of_match),
 },
 .probe  = tps65090_i2c_probe,
 .id_table = tps65090_id_table,
};

static int __init tps65090_init(void)
{
 return i2c_add_driver(&tps65090_driver);
}
subsys_initcall(tps65090_init);