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Date: Tue, 5 Jan 2021 14:53:35 +0200
From: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
To: matti.vaittinen@...rohmeurope.com, mazziesaccount@...il.com
Cc: Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
linux-power@...rohmeurope.com, linux-gpio@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] gpio: bd7xxxx: Do not depend on parent driver data
The ROHM BD70528 and BD71828 GPIO drivers only need the regmap
pointer from parent. Regmap can be obtained via dev_get_regmap()
so do not require parent to populate driver data for that.
Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
---
drivers/gpio/gpio-bd70528.c | 46 +++++++++++++++++--------------------
drivers/gpio/gpio-bd71828.c | 28 ++++++++++------------
2 files changed, 33 insertions(+), 41 deletions(-)
diff --git a/drivers/gpio/gpio-bd70528.c b/drivers/gpio/gpio-bd70528.c
index 45b3da8da336..276a0fe6346d 100644
--- a/drivers/gpio/gpio-bd70528.c
+++ b/drivers/gpio/gpio-bd70528.c
@@ -12,7 +12,8 @@
#define GPIO_OUT_REG(offset) (BD70528_REG_GPIO1_OUT + (offset) * 2)
struct bd70528_gpio {
- struct rohm_regmap_dev chip;
+ struct regmap *regmap;
+ struct device *dev;
struct gpio_chip gpio;
};
@@ -35,11 +36,11 @@ static int bd70528_set_debounce(struct bd70528_gpio *bdgpio,
val = BD70528_DEBOUNCE_50MS;
break;
default:
- dev_err(bdgpio->chip.dev,
+ dev_err(bdgpio->dev,
"Invalid debounce value %u\n", debounce);
return -EINVAL;
}
- return regmap_update_bits(bdgpio->chip.regmap, GPIO_IN_REG(offset),
+ return regmap_update_bits(bdgpio->regmap, GPIO_IN_REG(offset),
BD70528_DEBOUNCE_MASK, val);
}
@@ -49,9 +50,9 @@ static int bd70528_get_direction(struct gpio_chip *chip, unsigned int offset)
int val, ret;
/* Do we need to do something to IRQs here? */
- ret = regmap_read(bdgpio->chip.regmap, GPIO_OUT_REG(offset), &val);
+ ret = regmap_read(bdgpio->regmap, GPIO_OUT_REG(offset), &val);
if (ret) {
- dev_err(bdgpio->chip.dev, "Could not read gpio direction\n");
+ dev_err(bdgpio->dev, "Could not read gpio direction\n");
return ret;
}
if (val & BD70528_GPIO_OUT_EN_MASK)
@@ -67,13 +68,13 @@ static int bd70528_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
switch (pinconf_to_config_param(config)) {
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
- return regmap_update_bits(bdgpio->chip.regmap,
+ return regmap_update_bits(bdgpio->regmap,
GPIO_OUT_REG(offset),
BD70528_GPIO_DRIVE_MASK,
BD70528_GPIO_OPEN_DRAIN);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
- return regmap_update_bits(bdgpio->chip.regmap,
+ return regmap_update_bits(bdgpio->regmap,
GPIO_OUT_REG(offset),
BD70528_GPIO_DRIVE_MASK,
BD70528_GPIO_PUSH_PULL);
@@ -93,7 +94,7 @@ static int bd70528_direction_input(struct gpio_chip *chip, unsigned int offset)
struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
/* Do we need to do something to IRQs here? */
- return regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+ return regmap_update_bits(bdgpio->regmap, GPIO_OUT_REG(offset),
BD70528_GPIO_OUT_EN_MASK,
BD70528_GPIO_OUT_DISABLE);
}
@@ -105,10 +106,10 @@ static void bd70528_gpio_set(struct gpio_chip *chip, unsigned int offset,
struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
u8 val = (value) ? BD70528_GPIO_OUT_HI : BD70528_GPIO_OUT_LO;
- ret = regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+ ret = regmap_update_bits(bdgpio->regmap, GPIO_OUT_REG(offset),
BD70528_GPIO_OUT_MASK, val);
if (ret)
- dev_err(bdgpio->chip.dev, "Could not set gpio to %d\n", value);
+ dev_err(bdgpio->dev, "Could not set gpio to %d\n", value);
}
static int bd70528_direction_output(struct gpio_chip *chip, unsigned int offset,
@@ -117,7 +118,7 @@ static int bd70528_direction_output(struct gpio_chip *chip, unsigned int offset,
struct bd70528_gpio *bdgpio = gpiochip_get_data(chip);
bd70528_gpio_set(chip, offset, value);
- return regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+ return regmap_update_bits(bdgpio->regmap, GPIO_OUT_REG(offset),
BD70528_GPIO_OUT_EN_MASK,
BD70528_GPIO_OUT_ENABLE);
}
@@ -129,11 +130,11 @@ static int bd70528_gpio_get_o(struct bd70528_gpio *bdgpio, unsigned int offset)
int ret;
unsigned int val;
- ret = regmap_read(bdgpio->chip.regmap, GPIO_OUT_REG(offset), &val);
+ ret = regmap_read(bdgpio->regmap, GPIO_OUT_REG(offset), &val);
if (!ret)
ret = !!(val & BD70528_GPIO_OUT_MASK);
else
- dev_err(bdgpio->chip.dev, "GPIO (out) state read failed\n");
+ dev_err(bdgpio->dev, "GPIO (out) state read failed\n");
return ret;
}
@@ -143,12 +144,12 @@ static int bd70528_gpio_get_i(struct bd70528_gpio *bdgpio, unsigned int offset)
unsigned int val;
int ret;
- ret = regmap_read(bdgpio->chip.regmap, BD70528_REG_GPIO_STATE, &val);
+ ret = regmap_read(bdgpio->regmap, BD70528_REG_GPIO_STATE, &val);
if (!ret)
ret = !(val & GPIO_IN_STATE_MASK(offset));
else
- dev_err(bdgpio->chip.dev, "GPIO (in) state read failed\n");
+ dev_err(bdgpio->dev, "GPIO (in) state read failed\n");
return ret;
}
@@ -173,7 +174,7 @@ static int bd70528_gpio_get(struct gpio_chip *chip, unsigned int offset)
else if (ret == GPIO_LINE_DIRECTION_IN)
ret = bd70528_gpio_get_i(bdgpio, offset);
else
- dev_err(bdgpio->chip.dev, "failed to read GPIO direction\n");
+ dev_err(bdgpio->dev, "failed to read GPIO direction\n");
return ret;
}
@@ -181,20 +182,13 @@ static int bd70528_gpio_get(struct gpio_chip *chip, unsigned int offset)
static int bd70528_probe(struct platform_device *pdev)
{
struct bd70528_gpio *bdgpio;
- struct rohm_regmap_dev *bd70528;
int ret;
- bd70528 = dev_get_drvdata(pdev->dev.parent);
- if (!bd70528) {
- dev_err(&pdev->dev, "No MFD driver data\n");
- return -EINVAL;
- }
-
bdgpio = devm_kzalloc(&pdev->dev, sizeof(*bdgpio),
GFP_KERNEL);
if (!bdgpio)
return -ENOMEM;
- bdgpio->chip.dev = &pdev->dev;
+ bdgpio->dev = &pdev->dev;
bdgpio->gpio.parent = pdev->dev.parent;
bdgpio->gpio.label = "bd70528-gpio";
bdgpio->gpio.owner = THIS_MODULE;
@@ -210,7 +204,9 @@ static int bd70528_probe(struct platform_device *pdev)
#ifdef CONFIG_OF_GPIO
bdgpio->gpio.of_node = pdev->dev.parent->of_node;
#endif
- bdgpio->chip.regmap = bd70528->regmap;
+ bdgpio->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!bdgpio->regmap)
+ return -ENODEV;
ret = devm_gpiochip_add_data(&pdev->dev, &bdgpio->gpio,
bdgpio);
diff --git a/drivers/gpio/gpio-bd71828.c b/drivers/gpio/gpio-bd71828.c
index 3dbbc638e9a9..fcdcbb57c76d 100644
--- a/drivers/gpio/gpio-bd71828.c
+++ b/drivers/gpio/gpio-bd71828.c
@@ -11,7 +11,8 @@
#define HALL_GPIO_OFFSET 3
struct bd71828_gpio {
- struct rohm_regmap_dev chip;
+ struct regmap *regmap;
+ struct device *dev;
struct gpio_chip gpio;
};
@@ -29,10 +30,10 @@ static void bd71828_gpio_set(struct gpio_chip *chip, unsigned int offset,
if (offset == HALL_GPIO_OFFSET)
return;
- ret = regmap_update_bits(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+ ret = regmap_update_bits(bdgpio->regmap, GPIO_OUT_REG(offset),
BD71828_GPIO_OUT_MASK, val);
if (ret)
- dev_err(bdgpio->chip.dev, "Could not set gpio to %d\n", value);
+ dev_err(bdgpio->dev, "Could not set gpio to %d\n", value);
}
static int bd71828_gpio_get(struct gpio_chip *chip, unsigned int offset)
@@ -42,10 +43,10 @@ static int bd71828_gpio_get(struct gpio_chip *chip, unsigned int offset)
struct bd71828_gpio *bdgpio = gpiochip_get_data(chip);
if (offset == HALL_GPIO_OFFSET)
- ret = regmap_read(bdgpio->chip.regmap, BD71828_REG_IO_STAT,
+ ret = regmap_read(bdgpio->regmap, BD71828_REG_IO_STAT,
&val);
else
- ret = regmap_read(bdgpio->chip.regmap, GPIO_OUT_REG(offset),
+ ret = regmap_read(bdgpio->regmap, GPIO_OUT_REG(offset),
&val);
if (!ret)
ret = (val & BD71828_GPIO_OUT_MASK);
@@ -63,12 +64,12 @@ static int bd71828_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
switch (pinconf_to_config_param(config)) {
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
- return regmap_update_bits(bdgpio->chip.regmap,
+ return regmap_update_bits(bdgpio->regmap,
GPIO_OUT_REG(offset),
BD71828_GPIO_DRIVE_MASK,
BD71828_GPIO_OPEN_DRAIN);
case PIN_CONFIG_DRIVE_PUSH_PULL:
- return regmap_update_bits(bdgpio->chip.regmap,
+ return regmap_update_bits(bdgpio->regmap,
GPIO_OUT_REG(offset),
BD71828_GPIO_DRIVE_MASK,
BD71828_GPIO_PUSH_PULL);
@@ -97,20 +98,13 @@ static int bd71828_get_direction(struct gpio_chip *chip, unsigned int offset)
static int bd71828_probe(struct platform_device *pdev)
{
struct bd71828_gpio *bdgpio;
- struct rohm_regmap_dev *bd71828;
-
- bd71828 = dev_get_drvdata(pdev->dev.parent);
- if (!bd71828) {
- dev_err(&pdev->dev, "No MFD driver data\n");
- return -EINVAL;
- }
bdgpio = devm_kzalloc(&pdev->dev, sizeof(*bdgpio),
GFP_KERNEL);
if (!bdgpio)
return -ENOMEM;
- bdgpio->chip.dev = &pdev->dev;
+ bdgpio->dev = &pdev->dev;
bdgpio->gpio.parent = pdev->dev.parent;
bdgpio->gpio.label = "bd71828-gpio";
bdgpio->gpio.owner = THIS_MODULE;
@@ -128,7 +122,9 @@ static int bd71828_probe(struct platform_device *pdev)
*/
bdgpio->gpio.ngpio = 4;
bdgpio->gpio.of_node = pdev->dev.parent->of_node;
- bdgpio->chip.regmap = bd71828->regmap;
+ bdgpio->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!bdgpio->regmap)
+ return -ENODEV;
return devm_gpiochip_add_data(&pdev->dev, &bdgpio->gpio,
bdgpio);
base-commit: 2c85ebc57b3e1817b6ce1a6b703928e113a90442
--
2.25.4
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
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