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Diffstat (limited to 'drivers/regulator/lp8755.c')
-rw-r--r--drivers/regulator/lp8755.c163
1 files changed, 40 insertions, 123 deletions
diff --git a/drivers/regulator/lp8755.c b/drivers/regulator/lp8755.c
index 244822bb63cd..5509bee49bda 100644
--- a/drivers/regulator/lp8755.c
+++ b/drivers/regulator/lp8755.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* LP8755 High Performance Power Management Unit : System Interface Driver
* (based on rev. 0.26)
* Copyright 2012 Texas Instruments
*
* Author: Daniel(Geon Si) Jeong <daniel.jeong@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
*/
#include <linux/module.h>
@@ -17,7 +13,6 @@
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
-#include <linux/gpio.h>
#include <linux/regmap.h>
#include <linux/uaccess.h>
#include <linux/regulator/driver.h>
@@ -53,53 +48,15 @@ struct lp8755_chip {
struct regulator_dev *rdev[LP8755_BUCK_MAX];
};
-/**
- *lp8755_read : read a single register value from lp8755.
- *@pchip : device to read from
- *@reg : register to read from
- *@val : pointer to store read value
- */
-static int lp8755_read(struct lp8755_chip *pchip, unsigned int reg,
- unsigned int *val)
-{
- return regmap_read(pchip->regmap, reg, val);
-}
-
-/**
- *lp8755_write : write a single register value to lp8755.
- *@pchip : device to write to
- *@reg : register to write to
- *@val : value to be written
- */
-static int lp8755_write(struct lp8755_chip *pchip, unsigned int reg,
- unsigned int val)
-{
- return regmap_write(pchip->regmap, reg, val);
-}
-
-/**
- *lp8755_update_bits : set the values of bit fields in lp8755 register.
- *@pchip : device to read from
- *@reg : register to update
- *@mask : bitmask to be changed
- *@val : value for bitmask
- */
-static int lp8755_update_bits(struct lp8755_chip *pchip, unsigned int reg,
- unsigned int mask, unsigned int val)
-{
- return regmap_update_bits(pchip->regmap, reg, mask, val);
-}
-
static int lp8755_buck_enable_time(struct regulator_dev *rdev)
{
int ret;
unsigned int regval;
enum lp8755_bucks id = rdev_get_id(rdev);
- struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
- ret = lp8755_read(pchip, 0x12 + id, &regval);
+ ret = regmap_read(rdev->regmap, 0x12 + id, &regval);
if (ret < 0) {
- dev_err(pchip->dev, "i2c access error %s\n", __func__);
+ dev_err(&rdev->dev, "i2c access error %s\n", __func__);
return ret;
}
return (regval & 0xff) * 100;
@@ -119,17 +76,17 @@ static int lp8755_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
break;
case REGULATOR_MODE_NORMAL:
/* enable automatic pwm/pfm mode */
- ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x00);
+ ret = regmap_update_bits(rdev->regmap, 0x08 + id, 0x20, 0x00);
if (ret < 0)
goto err_i2c;
break;
case REGULATOR_MODE_IDLE:
/* enable automatic pwm/pfm/lppfm mode */
- ret = lp8755_update_bits(pchip, 0x08 + id, 0x20, 0x20);
+ ret = regmap_update_bits(rdev->regmap, 0x08 + id, 0x20, 0x20);
if (ret < 0)
goto err_i2c;
- ret = lp8755_update_bits(pchip, 0x10, 0x01, 0x01);
+ ret = regmap_update_bits(rdev->regmap, 0x10, 0x01, 0x01);
if (ret < 0)
goto err_i2c;
break;
@@ -139,12 +96,12 @@ static int lp8755_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
regbval = (0x01 << id);
}
- ret = lp8755_update_bits(pchip, 0x06, 0x01 << id, regbval);
+ ret = regmap_update_bits(rdev->regmap, 0x06, 0x01 << id, regbval);
if (ret < 0)
goto err_i2c;
return ret;
err_i2c:
- dev_err(pchip->dev, "i2c access error %s\n", __func__);
+ dev_err(&rdev->dev, "i2c access error %s\n", __func__);
return ret;
}
@@ -153,9 +110,8 @@ static unsigned int lp8755_buck_get_mode(struct regulator_dev *rdev)
int ret;
unsigned int regval;
enum lp8755_bucks id = rdev_get_id(rdev);
- struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
- ret = lp8755_read(pchip, 0x06, &regval);
+ ret = regmap_read(rdev->regmap, 0x06, &regval);
if (ret < 0)
goto err_i2c;
@@ -163,7 +119,7 @@ static unsigned int lp8755_buck_get_mode(struct regulator_dev *rdev)
if (regval & (0x01 << id))
return REGULATOR_MODE_FAST;
- ret = lp8755_read(pchip, 0x08 + id, &regval);
+ ret = regmap_read(rdev->regmap, 0x08 + id, &regval);
if (ret < 0)
goto err_i2c;
@@ -175,57 +131,13 @@ static unsigned int lp8755_buck_get_mode(struct regulator_dev *rdev)
return REGULATOR_MODE_NORMAL;
err_i2c:
- dev_err(pchip->dev, "i2c access error %s\n", __func__);
+ dev_err(&rdev->dev, "i2c access error %s\n", __func__);
return 0;
}
-static int lp8755_buck_set_ramp(struct regulator_dev *rdev, int ramp)
-{
- int ret;
- unsigned int regval = 0x00;
- enum lp8755_bucks id = rdev_get_id(rdev);
- struct lp8755_chip *pchip = rdev_get_drvdata(rdev);
-
- /* uV/us */
- switch (ramp) {
- case 0 ... 230:
- regval = 0x07;
- break;
- case 231 ... 470:
- regval = 0x06;
- break;
- case 471 ... 940:
- regval = 0x05;
- break;
- case 941 ... 1900:
- regval = 0x04;
- break;
- case 1901 ... 3800:
- regval = 0x03;
- break;
- case 3801 ... 7500:
- regval = 0x02;
- break;
- case 7501 ... 15000:
- regval = 0x01;
- break;
- case 15001 ... 30000:
- regval = 0x00;
- break;
- default:
- dev_err(pchip->dev,
- "Not supported ramp value %d %s\n", ramp, __func__);
- return -EINVAL;
- }
-
- ret = lp8755_update_bits(pchip, 0x07 + id, 0x07, regval);
- if (ret < 0)
- goto err_i2c;
- return ret;
-err_i2c:
- dev_err(pchip->dev, "i2c access error %s\n", __func__);
- return ret;
-}
+static const unsigned int lp8755_buck_ramp_table[] = {
+ 30000, 15000, 7500, 3800, 1900, 940, 470, 230
+};
static const struct regulator_ops lp8755_buck_ops = {
.map_voltage = regulator_map_voltage_linear,
@@ -238,7 +150,7 @@ static const struct regulator_ops lp8755_buck_ops = {
.enable_time = lp8755_buck_enable_time,
.set_mode = lp8755_buck_set_mode,
.get_mode = lp8755_buck_get_mode,
- .set_ramp_delay = lp8755_buck_set_ramp,
+ .set_ramp_delay = regulator_set_ramp_delay_regmap,
};
#define lp8755_rail(_id) "lp8755_buck"#_id
@@ -282,7 +194,7 @@ static int lp8755_init_data(struct lp8755_chip *pchip)
struct lp8755_platform_data *pdata = pchip->pdata;
/* read back muti-phase configuration */
- ret = lp8755_read(pchip, 0x3D, &regval);
+ ret = regmap_read(pchip->regmap, 0x3D, &regval);
if (ret < 0)
goto out_i2c_error;
pchip->mphase = regval & 0x0F;
@@ -313,9 +225,13 @@ out_i2c_error:
.enable_mask = LP8755_BUCK_EN_M,\
.vsel_reg = LP8755_REG_BUCK##_id,\
.vsel_mask = LP8755_BUCK_VOUT_M,\
+ .ramp_reg = (LP8755_BUCK##_id) + 0x7,\
+ .ramp_mask = 0x7,\
+ .ramp_delay_table = lp8755_buck_ramp_table,\
+ .n_ramp_values = ARRAY_SIZE(lp8755_buck_ramp_table),\
}
-static struct regulator_desc lp8755_regulators[] = {
+static const struct regulator_desc lp8755_regulators[] = {
lp8755_buck_desc(0),
lp8755_buck_desc(1),
lp8755_buck_desc(2),
@@ -360,11 +276,11 @@ static irqreturn_t lp8755_irq_handler(int irq, void *data)
struct lp8755_chip *pchip = data;
/* read flag0 register */
- ret = lp8755_read(pchip, 0x0D, &flag0);
+ ret = regmap_read(pchip->regmap, 0x0D, &flag0);
if (ret < 0)
goto err_i2c;
/* clear flag register to pull up int. pin */
- ret = lp8755_write(pchip, 0x0D, 0x00);
+ ret = regmap_write(pchip->regmap, 0x0D, 0x00);
if (ret < 0)
goto err_i2c;
@@ -372,35 +288,38 @@ static irqreturn_t lp8755_irq_handler(int irq, void *data)
for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
if ((flag0 & (0x4 << icnt))
&& (pchip->irqmask & (0x04 << icnt))
- && (pchip->rdev[icnt] != NULL))
+ && (pchip->rdev[icnt] != NULL)) {
regulator_notifier_call_chain(pchip->rdev[icnt],
LP8755_EVENT_PWR_FAULT,
NULL);
+ }
/* read flag1 register */
- ret = lp8755_read(pchip, 0x0E, &flag1);
+ ret = regmap_read(pchip->regmap, 0x0E, &flag1);
if (ret < 0)
goto err_i2c;
/* clear flag register to pull up int. pin */
- ret = lp8755_write(pchip, 0x0E, 0x00);
+ ret = regmap_write(pchip->regmap, 0x0E, 0x00);
if (ret < 0)
goto err_i2c;
- /* send OCP event to all regualtor devices */
+ /* send OCP event to all regulator devices */
if ((flag1 & 0x01) && (pchip->irqmask & 0x01))
for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
- if (pchip->rdev[icnt] != NULL)
+ if (pchip->rdev[icnt] != NULL) {
regulator_notifier_call_chain(pchip->rdev[icnt],
LP8755_EVENT_OCP,
NULL);
+ }
- /* send OVP event to all regualtor devices */
+ /* send OVP event to all regulator devices */
if ((flag1 & 0x02) && (pchip->irqmask & 0x02))
for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
- if (pchip->rdev[icnt] != NULL)
+ if (pchip->rdev[icnt] != NULL) {
regulator_notifier_call_chain(pchip->rdev[icnt],
LP8755_EVENT_OVP,
NULL);
+ }
return IRQ_HANDLED;
err_i2c:
@@ -418,7 +337,7 @@ static int lp8755_int_config(struct lp8755_chip *pchip)
return 0;
}
- ret = lp8755_read(pchip, 0x0F, &regval);
+ ret = regmap_read(pchip->regmap, 0x0F, &regval);
if (ret < 0) {
dev_err(pchip->dev, "i2c access error %s\n", __func__);
return ret;
@@ -437,8 +356,7 @@ static const struct regmap_config lp8755_regmap = {
.max_register = LP8755_REG_MAX,
};
-static int lp8755_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int lp8755_probe(struct i2c_client *client)
{
int ret, icnt;
struct lp8755_chip *pchip;
@@ -497,24 +415,22 @@ static int lp8755_probe(struct i2c_client *client,
err:
/* output disable */
for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
- lp8755_write(pchip, icnt, 0x00);
+ regmap_write(pchip->regmap, icnt, 0x00);
return ret;
}
-static int lp8755_remove(struct i2c_client *client)
+static void lp8755_remove(struct i2c_client *client)
{
int icnt;
struct lp8755_chip *pchip = i2c_get_clientdata(client);
for (icnt = 0; icnt < LP8755_BUCK_MAX; icnt++)
- lp8755_write(pchip, icnt, 0x00);
-
- return 0;
+ regmap_write(pchip->regmap, icnt, 0x00);
}
static const struct i2c_device_id lp8755_id[] = {
- {LP8755_NAME, 0},
+ { LP8755_NAME },
{}
};
@@ -523,6 +439,7 @@ MODULE_DEVICE_TABLE(i2c, lp8755_id);
static struct i2c_driver lp8755_i2c_driver = {
.driver = {
.name = LP8755_NAME,
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.probe = lp8755_probe,
.remove = lp8755_remove,
generated by cgit (git 2.34.1) at 2025-12-25 05:13:27 +0000