gpio: pca953x: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Markus Pargmann <mpa@pengutronix.de>
Cc: Toby Smith <toby@tismith.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index be3e3b9..23196c5 100644 (file)
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -107,11 +107,6 @@ struct pca953x_chip {
        unsigned long driver_data;
 };
 
-static inline struct pca953x_chip *to_pca(struct gpio_chip *gc)
-{
-       return container_of(gc, struct pca953x_chip, gpio_chip);
-}
-
 static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
                                int off)
 {
@@ -214,7 +209,7 @@ static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val)
 
 static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
 {
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        u8 reg_val;
        int ret, offset = 0;
 
@@ -243,7 +238,7 @@ exit:
 static int pca953x_gpio_direction_output(struct gpio_chip *gc,
                unsigned off, int val)
 {
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        u8 reg_val;
        int ret, offset = 0;
 
@@ -293,7 +288,7 @@ exit:
 
 static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
 {
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        u32 reg_val;
        int ret, offset = 0;
 
@@ -321,7 +316,7 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
 
 static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
 {
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        u8 reg_val;
        int ret, offset = 0;
 
@@ -354,7 +349,7 @@ exit:
 static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
                unsigned long *mask, unsigned long *bits)
 {
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        u8 reg_val[MAX_BANK];
        int ret, offset = 0;
        int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
@@ -412,7 +407,7 @@ static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
 static void pca953x_irq_mask(struct irq_data *d)
 {
        struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
 
        chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ));
 }
@@ -420,7 +415,7 @@ static void pca953x_irq_mask(struct irq_data *d)
 static void pca953x_irq_unmask(struct irq_data *d)
 {
        struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
 
        chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ);
 }
@@ -428,7 +423,7 @@ static void pca953x_irq_unmask(struct irq_data *d)
 static void pca953x_irq_bus_lock(struct irq_data *d)
 {
        struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
 
        mutex_lock(&chip->irq_lock);
 }
@@ -436,7 +431,7 @@ static void pca953x_irq_bus_lock(struct irq_data *d)
 static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
 {
        struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        u8 new_irqs;
        int level, i;
 
@@ -459,7 +454,7 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
 static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
 {
        struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-       struct pca953x_chip *chip = to_pca(gc);
+       struct pca953x_chip *chip = gpiochip_get_data(gc);
        int bank_nb = d->hwirq / BANK_SZ;
        u8 mask = 1 << (d->hwirq % BANK_SZ);
 
@@ -759,7 +754,7 @@ static int pca953x_probe(struct i2c_client *client,
        if (ret)
                return ret;
 
-       ret = gpiochip_add(&chip->gpio_chip);
+       ret = gpiochip_add_data(&chip->gpio_chip, chip);
        if (ret)
                return ret;