openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

gpio: samsung: Remove OF support for s3c24xx 

There is no users of this code and there is already a pinctrl
driver written for s3c24xx which is going to be used on any
s3c24xx DT platforms. Hence this has been effectively a dead
code in mainline.

This reverts commit 172c6a1365
gpio: samsung: add devicetree init for s3c24xx arches

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Sylwester Nawrocki 2013-06-10 18:22:19 +09:00 committed by Kukjin Kim
parent f722406faa
commit 9fdb27d48a
2 changed files with 0 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
Documentation/devicetree/bindings/gpio/gpio-samsung.txt
View File

@ -39,46 +39,3 @@ Example:
#gpio-cells = <4>;
gpio-controller;
};
Samsung S3C24XX GPIO Controller
Required properties:
- compatible: Compatible property value should be "samsung,s3c24xx-gpio".
- reg: Physical base address of the controller and length of memory mapped
region.
- #gpio-cells: Should be 3. The syntax of the gpio specifier used by client nodes
should be the following with values derived from the SoC user manual.
<[phandle of the gpio controller node]
[pin number within the gpio controller]
[mux function]
[flags and pull up/down]
Values for gpio specifier:
- Pin number: depending on the controller a number from 0 up to 15.
- Mux function: Depending on the SoC and the gpio bank the gpio can be set
as input, output or a special function
- Flags and Pull Up/Down: the values to use differ for the individual SoCs
example S3C2416/S3C2450:
0 - Pull Up/Down Disabled.
1 - Pull Down Enabled.
2 - Pull Up Enabled.
Bit 16 (0x00010000) - Input is active low.
Consult the user manual for the correct values of Mux and Pull Up/Down.
- gpio-controller: Specifies that the node is a gpio controller.
- #address-cells: should be 1.
- #size-cells: should be 1.
Example:
gpa: gpio-controller@56000000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "samsung,s3c24xx-gpio";
reg = <0x56000000 0x10>;
#gpio-cells = <3>;
gpio-controller;
};

63
drivers/gpio/gpio-samsung.c
View File

@ -933,67 +933,6 @@ static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)
s3c_gpiolib_track(chip);
}
#if defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF)
static int s3c24xx_gpio_xlate(struct gpio_chip *gc,
const struct of_phandle_args *gpiospec, u32 *flags)
{
unsigned int pin;
if (WARN_ON(gc->of_gpio_n_cells < 3))
return -EINVAL;
if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
return -EINVAL;
if (gpiospec->args[0] > gc->ngpio)
return -EINVAL;
pin = gc->base + gpiospec->args[0];
if (s3c_gpio_cfgpin(pin, S3C_GPIO_SFN(gpiospec->args[1])))
pr_warn("gpio_xlate: failed to set pin function\n");
if (s3c_gpio_setpull(pin, gpiospec->args[2] & 0xffff))
pr_warn("gpio_xlate: failed to set pin pull up/down\n");
if (flags)
*flags = gpiospec->args[2] >> 16;
return gpiospec->args[0];
}
static const struct of_device_id s3c24xx_gpio_dt_match[] __initdata = {
{ .compatible = "samsung,s3c24xx-gpio", },
{}
};
static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
u64 base, u64 offset)
{
struct gpio_chip *gc = &chip->chip;
u64 address;
if (!of_have_populated_dt())
return;
address = chip->base ? base + ((u32)chip->base & 0xfff) : base + offset;
gc->of_node = of_find_matching_node_by_address(NULL,
s3c24xx_gpio_dt_match, address);
if (!gc->of_node) {
pr_info("gpio: device tree node not found for gpio controller"
" with base address %08llx\n", address);
return;
}
gc->of_gpio_n_cells = 3;
gc->of_xlate = s3c24xx_gpio_xlate;
}
#else
static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
u64 base, u64 offset)
{
return;
}
#endif /* defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF) */
static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip,
int nr_chips, void __iomem *base)
{
@ -1018,8 +957,6 @@ static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip,
gc->direction_output = samsung_gpiolib_2bit_output;
samsung_gpiolib_add(chip);
s3c24xx_gpiolib_attach_ofnode(chip, S3C24XX_PA_GPIO, i * 0x10);
}
}