powerpc: cpm_common: 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: 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>

diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index 9d32465..0ac12e5 100644 (file)
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -80,15 +80,9 @@ struct cpm2_gpio32_chip {
        u32 cpdata;
 };
 
-static inline struct cpm2_gpio32_chip *
-to_cpm2_gpio32_chip(struct of_mm_gpio_chip *mm_gc)
-{
-       return container_of(mm_gc, struct cpm2_gpio32_chip, mm_gc);
-}
-
 static void cpm2_gpio32_save_regs(struct of_mm_gpio_chip *mm_gc)
 {
-       struct cpm2_gpio32_chip *cpm2_gc = to_cpm2_gpio32_chip(mm_gc);
+       struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(&mm_gc->gc);
        struct cpm2_ioports __iomem *iop = mm_gc->regs;
 
        cpm2_gc->cpdata = in_be32(&iop->dat);
@@ -108,7 +102,7 @@ static int cpm2_gpio32_get(struct gpio_chip *gc, unsigned int gpio)
 static void __cpm2_gpio32_set(struct of_mm_gpio_chip *mm_gc, u32 pin_mask,
        int value)
 {
-       struct cpm2_gpio32_chip *cpm2_gc = to_cpm2_gpio32_chip(mm_gc);
+       struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(&mm_gc->gc);
        struct cpm2_ioports __iomem *iop = mm_gc->regs;
 
        if (value)
@@ -122,7 +116,7 @@ static void __cpm2_gpio32_set(struct of_mm_gpio_chip *mm_gc, u32 pin_mask,
 static void cpm2_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
 {
        struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-       struct cpm2_gpio32_chip *cpm2_gc = to_cpm2_gpio32_chip(mm_gc);
+       struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
        unsigned long flags;
        u32 pin_mask = 1 << (31 - gpio);
 
@@ -136,7 +130,7 @@ static void cpm2_gpio32_set(struct gpio_chip *gc, unsigned int gpio, int value)
 static int cpm2_gpio32_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
 {
        struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-       struct cpm2_gpio32_chip *cpm2_gc = to_cpm2_gpio32_chip(mm_gc);
+       struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
        struct cpm2_ioports __iomem *iop = mm_gc->regs;
        unsigned long flags;
        u32 pin_mask = 1 << (31 - gpio);
@@ -154,7 +148,7 @@ static int cpm2_gpio32_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
 static int cpm2_gpio32_dir_in(struct gpio_chip *gc, unsigned int gpio)
 {
        struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-       struct cpm2_gpio32_chip *cpm2_gc = to_cpm2_gpio32_chip(mm_gc);
+       struct cpm2_gpio32_chip *cpm2_gc = gpiochip_get_data(gc);
        struct cpm2_ioports __iomem *iop = mm_gc->regs;
        unsigned long flags;
        u32 pin_mask = 1 << (31 - gpio);
@@ -190,6 +184,6 @@ int cpm2_gpiochip_add32(struct device_node *np)
        gc->get = cpm2_gpio32_get;
        gc->set = cpm2_gpio32_set;
 
-       return of_mm_gpiochip_add(np, mm_gc);
+       return of_mm_gpiochip_add_data(np, mm_gc, cpm2_gc);
 }
 #endif /* CONFIG_CPM2 || CONFIG_8xx_GPIO */