diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2013-09-09 18:39:51 +0400 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-09-21 01:04:50 +0400 |
| commit | 7b85b867b99044da93f83851c806d1e324d49ed5 (patch) | |
| tree | 22fd6412f7d986b1d3720badd4d5fe60f3fd9a45 /drivers/gpio/gpio-iop.c | |
| parent | 51a97d829e32b7a1b960d3365e4c2546c9c792aa (diff) | |
| download | linux-7b85b867b99044da93f83851c806d1e324d49ed5.tar.xz | |
ARM: plat-iop: instantiate GPIO from platform device
This converts the IOP32x and IOP33x platforms to pass their
base address offset by a resource attached to a platform device
instead of using static offset macros implicitly passed
through <linux/gpio.h> including <mach/gpio.h>. Delete the
local <mach/gpio.h> and <asm/hardware/iop3xx-gpio.h> headers
and remove the selection of NEED_MACH_GPIO_H.
Pass the virtual address as a resource in the platform device
at this point for bisectability, next patch will pass the
physical address as is custom.
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Mikael Pettersson <mikpe@it.uu.se>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-iop.c')
| -rw-r--r-- | drivers/gpio/gpio-iop.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-iop.c b/drivers/gpio/gpio-iop.c index 17cc7010cd04..24a86b05dc8c 100644 --- a/drivers/gpio/gpio-iop.c +++ b/drivers/gpio/gpio-iop.c @@ -16,9 +16,23 @@ #include <linux/errno.h> #include <linux/gpio.h> #include <linux/export.h> +#include <linux/platform_device.h> #define IOP3XX_N_GPIOS 8 +#define GPIO_IN 0 +#define GPIO_OUT 1 +#define GPIO_LOW 0 +#define GPIO_HIGH 1 + +/* Memory base offset */ +static void __iomem *base; + +#define IOP3XX_GPIO_REG(reg) (base + (reg)) +#define IOP3XX_GPOE (volatile u32 *)IOP3XX_GPIO_REG(0x0000) +#define IOP3XX_GPID (volatile u32 *)IOP3XX_GPIO_REG(0x0004) +#define IOP3XX_GPOD (volatile u32 *)IOP3XX_GPIO_REG(0x0008) + static void gpio_line_config(int line, int direction) { unsigned long flags; @@ -83,8 +97,26 @@ static struct gpio_chip iop3xx_chip = { .ngpio = IOP3XX_N_GPIOS, }; -static int __init iop3xx_gpio_setup(void) +static int iop3xx_gpio_probe(struct platform_device *pdev) { + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = (void *) res->start; + return gpiochip_add(&iop3xx_chip); } -arch_initcall(iop3xx_gpio_setup); + +static struct platform_driver iop3xx_gpio_driver = { + .driver = { + .name = "gpio-iop", + .owner = THIS_MODULE, + }, + .probe = iop3xx_gpio_probe, +}; + +static int __init iop3xx_gpio_init(void) +{ + return platform_driver_register(&iop3xx_gpio_driver); +} +arch_initcall(iop3xx_gpio_init); |