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gpio: rmobile: Set GPIO mode in GPSR when requested

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When requesting a GPIO, set the PFC GPSR register to GPIO mode,
otherwise the GPIO cannot work.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Marek Vasut 2017-11-26 18:08:53 +01:00
parent f6e545a73f
commit 52c8034bb4
1 changed files with 19 additions and 1 deletions
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20
drivers/gpio/gpio-rcar.c
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@ -10,6 +10,7 @@
#include <errno.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include "../pinctrl/renesas/sh_pfc.h"
#define GPIO_IOINTSEL 0x00 /* General IO/Interrupt Switching Register */
#define GPIO_INOUTSEL 0x04 /* General Input/Output Switching Register */
@ -29,7 +30,8 @@
DECLARE_GLOBAL_DATA_PTR;
struct rcar_gpio_priv {
void __iomem *regs;
void __iomem *regs;
int pfc_offset;
};
static int rcar_gpio_get_value(struct udevice *dev, unsigned offset)
@ -113,7 +115,22 @@ static int rcar_gpio_get_function(struct udevice *dev, unsigned offset)
return GPIOF_INPUT;
}
static int rcar_gpio_request(struct udevice *dev, unsigned offset,
const char *label)
{
struct rcar_gpio_priv *priv = dev_get_priv(dev);
struct udevice *pctldev;
int ret;
ret = uclass_get_device(UCLASS_PINCTRL, 0, &pctldev);
if (ret)
return ret;
return sh_pfc_config_mux_for_gpio(pctldev, priv->pfc_offset + offset);
}
static const struct dm_gpio_ops rcar_gpio_ops = {
.request = rcar_gpio_request,
.direction_input = rcar_gpio_direction_input,
.direction_output = rcar_gpio_direction_output,
.get_value = rcar_gpio_get_value,
@ -135,6 +152,7 @@ static int rcar_gpio_probe(struct udevice *dev)
ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
NULL, 3, 0, &args);
priv->pfc_offset = ret == 0 ? args.args[1] : -1;
uc_priv->gpio_count = ret == 0 ? args.args[2] : RCAR_MAX_GPIO_PER_BANK;
ret = clk_get_by_index(dev, 0, &clk);