pinctrl: abx500: rework error path
At several places, return value was not tested and error output was missing. Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
parent
acd260b0aa
commit
9be580afe4
|
@ -134,8 +134,8 @@ static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg,
|
|||
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev,
|
||||
"%s read reg =%x, offset=%x failed\n",
|
||||
__func__, reg, offset);
|
||||
"%s read reg =%x, offset=%x failed (%d)\n",
|
||||
__func__, reg, offset, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
@ -151,7 +151,8 @@ static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg,
|
|||
ret = abx500_mask_and_set_register_interruptible(pct->dev,
|
||||
AB8500_MISC, reg, BIT(pos), val << pos);
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s write failed\n", __func__);
|
||||
dev_err(pct->dev, "%s write reg, %x offset %x failed (%d)\n",
|
||||
__func__, reg, offset, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
@ -171,10 +172,8 @@ static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset)
|
|||
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG,
|
||||
gpio_offset, &is_out);
|
||||
if (ret < 0) {
|
||||
dev_err(pct->dev, "%s failed\n", __func__);
|
||||
return ret;
|
||||
}
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
if (is_out)
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_OUT1_REG,
|
||||
|
@ -182,8 +181,9 @@ static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset)
|
|||
else
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_IN1_REG,
|
||||
gpio_offset, &bit);
|
||||
out:
|
||||
if (ret < 0) {
|
||||
dev_err(pct->dev, "%s failed\n", __func__);
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
@ -197,7 +197,7 @@ static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
|
|||
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val);
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s write failed\n", __func__);
|
||||
dev_err(pct->dev, "%s write failed (%d)\n", __func__, ret);
|
||||
}
|
||||
|
||||
static int abx500_get_pull_updown(struct abx500_pinctrl *pct, int offset,
|
||||
|
@ -294,7 +294,7 @@ static int abx500_gpio_direction_output(struct gpio_chip *chip,
|
|||
offset,
|
||||
ABX500_GPIO_OUTPUT);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
goto out;
|
||||
|
||||
/* disable pull down */
|
||||
ret = abx500_gpio_set_bits(chip,
|
||||
|
@ -302,7 +302,7 @@ static int abx500_gpio_direction_output(struct gpio_chip *chip,
|
|||
offset,
|
||||
ABX500_GPIO_PULL_NONE);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
goto out;
|
||||
|
||||
/* if supported, disable both pull down and pull up */
|
||||
gpio = offset + 1;
|
||||
|
@ -310,8 +310,11 @@ static int abx500_gpio_direction_output(struct gpio_chip *chip,
|
|||
ret = abx500_set_pull_updown(pct,
|
||||
gpio,
|
||||
ABX500_GPIO_PULL_NONE);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
out:
|
||||
if (ret < 0) {
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* set the output as 1 or 0 */
|
||||
|
@ -409,10 +412,16 @@ static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
if (af.alt_bit1 != UNUSED) {
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
|
||||
offset, 0);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret = abx500_gpio_set_bits(chip,
|
||||
AB8500_GPIO_ALTFUN_REG,
|
||||
af.alt_bit1,
|
||||
!!(af.alta_val && BIT(0)));
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
if (af.alt_bit2 != UNUSED)
|
||||
ret = abx500_gpio_set_bits(chip,
|
||||
AB8500_GPIO_ALTFUN_REG,
|
||||
|
@ -426,8 +435,14 @@ static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
case ABX500_ALT_B:
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
|
||||
offset, 0);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
|
||||
af.alt_bit1, !!(af.altb_val && BIT(0)));
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
if (af.alt_bit2 != UNUSED)
|
||||
ret = abx500_gpio_set_bits(chip,
|
||||
AB8500_GPIO_ALTFUN_REG,
|
||||
|
@ -438,8 +453,14 @@ static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
case ABX500_ALT_C:
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG,
|
||||
offset, 0);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
|
||||
af.alt_bit2, !!(af.altc_val && BIT(0)));
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG,
|
||||
af.alt_bit2, !!(af.altc_val && BIT(1)));
|
||||
break;
|
||||
|
@ -449,11 +470,14 @@ static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
|
||||
return -EINVAL;
|
||||
}
|
||||
out:
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
||||
static int abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
||||
unsigned gpio)
|
||||
{
|
||||
u8 mode;
|
||||
|
@ -464,6 +488,7 @@ static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
struct alternate_functions af = pct->soc->alternate_functions[gpio];
|
||||
/* on ABx5xx, there is no GPIO0, so adjust the offset */
|
||||
unsigned offset = gpio - 1;
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* if gpiosel_bit is set to unused,
|
||||
|
@ -473,8 +498,11 @@ static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
return ABX500_DEFAULT;
|
||||
|
||||
/* read GpioSelx register */
|
||||
abx500_gpio_get_bit(chip, AB8500_GPIO_SEL1_REG + (offset / 8),
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_SEL1_REG + (offset / 8),
|
||||
af.gpiosel_bit, &bit_mode);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
mode = bit_mode;
|
||||
|
||||
/* sanity check */
|
||||
|
@ -506,14 +534,19 @@ static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
* pin use the AlternatFunction register
|
||||
* read alt_bit1 value
|
||||
*/
|
||||
abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG,
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG,
|
||||
af.alt_bit1, &alt_bit1);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
if (af.alt_bit2 != UNUSED)
|
||||
if (af.alt_bit2 != UNUSED) {
|
||||
/* read alt_bit2 value */
|
||||
abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG, af.alt_bit2,
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG,
|
||||
af.alt_bit2,
|
||||
&alt_bit2);
|
||||
else
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
} else
|
||||
alt_bit2 = 0;
|
||||
|
||||
mode = (alt_bit2 << 1) + alt_bit1;
|
||||
|
@ -523,6 +556,10 @@ static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip,
|
|||
return ABX500_ALT_B;
|
||||
else
|
||||
return ABX500_ALT_C;
|
||||
|
||||
out:
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_DEBUG_FS
|
||||
|
@ -541,6 +578,7 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
|
|||
bool is_out;
|
||||
bool pd;
|
||||
enum abx500_gpio_pull_updown pud = 0;
|
||||
int ret;
|
||||
|
||||
const char *modes[] = {
|
||||
[ABX500_DEFAULT] = "default",
|
||||
|
@ -556,7 +594,10 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
|
|||
[ABX500_GPIO_PULL_UP] = "pull up",
|
||||
};
|
||||
|
||||
abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG, gpio_offset, &is_out);
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG,
|
||||
gpio_offset, &is_out);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
seq_printf(s, " gpio-%-3d (%-20.20s) %-3s",
|
||||
gpio, label ?: "(none)",
|
||||
|
@ -564,11 +605,17 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
|
|||
|
||||
if (!is_out) {
|
||||
if (abx500_pullud_supported(chip, offset)) {
|
||||
abx500_get_pull_updown(pct, offset, &pud);
|
||||
ret = abx500_get_pull_updown(pct, offset, &pud);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
seq_printf(s, " %-9s", pull_up_down[pud]);
|
||||
} else {
|
||||
abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG,
|
||||
gpio_offset, &pd);
|
||||
ret = abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG,
|
||||
gpio_offset, &pd);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
seq_printf(s, " %-9s", pull_up_down[pd]);
|
||||
}
|
||||
} else
|
||||
|
@ -578,6 +625,10 @@ static void abx500_gpio_dbg_show_one(struct seq_file *s,
|
|||
mode = abx500_get_mode(pctldev, chip, offset);
|
||||
|
||||
seq_printf(s, " %s", (mode < 0) ? "unknown" : modes[mode]);
|
||||
|
||||
out:
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
}
|
||||
|
||||
static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
|
||||
|
@ -681,6 +732,9 @@ static int abx500_pmx_enable(struct pinctrl_dev *pctldev, unsigned function,
|
|||
ret = abx500_set_mode(pctldev, chip, g->pins[i], g->altsetting);
|
||||
}
|
||||
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
@ -729,10 +783,8 @@ static int abx500_gpio_request_enable(struct pinctrl_dev *pctldev,
|
|||
|
||||
ret = abx500_set_mode(pct->pctldev, &pct->chip,
|
||||
offset, p->altfunc);
|
||||
if (ret < 0) {
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s setting altfunc failed\n", __func__);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
@ -1009,6 +1061,8 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
|
|||
switch (param) {
|
||||
case PIN_CONFIG_BIAS_DISABLE:
|
||||
ret = abx500_gpio_direction_input(chip, offset);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
/*
|
||||
* Some chips only support pull down, while some actually
|
||||
* support both pull up and pull down. Such chips have
|
||||
|
@ -1028,6 +1082,8 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
|
|||
|
||||
case PIN_CONFIG_BIAS_PULL_DOWN:
|
||||
ret = abx500_gpio_direction_input(chip, offset);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
/*
|
||||
* if argument = 1 set the pull down
|
||||
* else clear the pull down
|
||||
|
@ -1050,6 +1106,8 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
|
|||
|
||||
case PIN_CONFIG_BIAS_PULL_UP:
|
||||
ret = abx500_gpio_direction_input(chip, offset);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
/*
|
||||
* if argument = 1 set the pull up
|
||||
* else clear the pull up
|
||||
|
@ -1070,12 +1128,14 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
|
|||
|
||||
case PIN_CONFIG_OUTPUT:
|
||||
ret = abx500_gpio_direction_output(chip, offset, argument);
|
||||
|
||||
break;
|
||||
|
||||
default:
|
||||
dev_err(chip->dev, "illegal configuration requested\n");
|
||||
}
|
||||
out:
|
||||
if (ret < 0)
|
||||
dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue