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powerpc: simple-gpio: 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: Anton Vorontsov <anton@enomsg.org> Cc: Anatolij Gustschin <agust@denx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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1e714e54b5
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@ -19,7 +19,7 @@
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/gpio.h>
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#include <linux/gpio/driver.h>
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#include <linux/slab.h>
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#include <asm/prom.h>
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#include "simple_gpio.h"
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@ -32,11 +32,6 @@ struct u8_gpio_chip {
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u8 data;
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};
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static struct u8_gpio_chip *to_u8_gpio_chip(struct of_mm_gpio_chip *mm_gc)
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{
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return container_of(mm_gc, struct u8_gpio_chip, mm_gc);
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}
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static u8 u8_pin2mask(unsigned int pin)
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{
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return 1 << (8 - 1 - pin);
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@ -52,7 +47,7 @@ static int u8_gpio_get(struct gpio_chip *gc, unsigned int gpio)
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static void u8_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
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{
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struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
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struct u8_gpio_chip *u8_gc = to_u8_gpio_chip(mm_gc);
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struct u8_gpio_chip *u8_gc = gpiochip_get_data(gc);
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unsigned long flags;
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spin_lock_irqsave(&u8_gc->lock, flags);
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@ -80,7 +75,7 @@ static int u8_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
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static void u8_gpio_save_regs(struct of_mm_gpio_chip *mm_gc)
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{
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struct u8_gpio_chip *u8_gc = to_u8_gpio_chip(mm_gc);
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struct u8_gpio_chip *u8_gc = gpiochip_get_data(&mm_gc->gc);
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u8_gc->data = in_8(mm_gc->regs);
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}
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@ -108,7 +103,7 @@ static int __init u8_simple_gpiochip_add(struct device_node *np)
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gc->get = u8_gpio_get;
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gc->set = u8_gpio_set;
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ret = of_mm_gpiochip_add(np, mm_gc);
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ret = of_mm_gpiochip_add_data(np, mm_gc, u8_gc);
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if (ret)
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goto err;
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return 0;
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