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path: root/drivers/pinctrl/pinctrl-rockchip.c
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Diffstat (limited to 'drivers/pinctrl/pinctrl-rockchip.c')
-rw-r--r--drivers/pinctrl/pinctrl-rockchip.c48
1 files changed, 40 insertions, 8 deletions
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 46dddc1..96c60d2 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -342,7 +342,7 @@ static const struct pinctrl_ops rockchip_pctrl_ops = {
* @pin: pin to change
* @mux: new mux function to set
*/
-static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
+static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
{
struct rockchip_pinctrl *info = bank->drvdata;
void __iomem *reg = info->reg_base + info->ctrl->mux_offset;
@@ -350,6 +350,20 @@ static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
u8 bit;
u32 data;
+ /*
+ * The first 16 pins of rk3188_bank0 are always gpios and do not have
+ * a mux register at all.
+ */
+ if (bank->bank_type == RK3188_BANK0 && pin < 16) {
+ if (mux != RK_FUNC_GPIO) {
+ dev_err(info->dev,
+ "pin %d only supports a gpio mux\n", pin);
+ return -ENOTSUPP;
+ } else {
+ return 0;
+ }
+ }
+
dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
bank->bank_num, pin, mux);
@@ -365,6 +379,8 @@ static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
writel(data, reg);
spin_unlock_irqrestore(&bank->slock, flags);
+
+ return 0;
}
#define RK2928_PULL_OFFSET 0x118
@@ -560,7 +576,7 @@ static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
const unsigned int *pins = info->groups[group].pins;
const struct rockchip_pin_config *data = info->groups[group].data;
struct rockchip_pin_bank *bank;
- int cnt;
+ int cnt, ret = 0;
dev_dbg(info->dev, "enable function %s group %s\n",
info->functions[selector].name, info->groups[group].name);
@@ -571,8 +587,18 @@ static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
*/
for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
bank = pin_to_bank(info, pins[cnt]);
- rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
- data[cnt].func);
+ ret = rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
+ data[cnt].func);
+ if (ret)
+ break;
+ }
+
+ if (ret) {
+ /* revert the already done pin settings */
+ for (cnt--; cnt >= 0; cnt--)
+ rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
+
+ return ret;
}
return 0;
@@ -607,7 +633,7 @@ static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct rockchip_pin_bank *bank;
struct gpio_chip *chip;
- int pin;
+ int pin, ret;
u32 data;
chip = range->gc;
@@ -617,7 +643,9 @@ static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
offset, range->name, pin, input ? "input" : "output");
- rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
+ ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
+ if (ret < 0)
+ return ret;
data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
/* set bit to 1 for output, 0 for input */
@@ -1144,9 +1172,13 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
u32 polarity;
u32 level;
u32 data;
+ int ret;
/* make sure the pin is configured as gpio input */
- rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
+ ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
+ if (ret < 0)
+ return ret;
+
data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
data &= ~mask;
writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
@@ -1534,7 +1566,7 @@ static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
.nr_banks = ARRAY_SIZE(rk3188_pin_banks),
.label = "RK3188-GPIO",
.type = RK3188,
- .mux_offset = 0x68,
+ .mux_offset = 0x60,
.pull_calc_reg = rk3188_calc_pull_reg_and_bit,
};