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Commit 9be580af authored by Patrice Chotard's avatar Patrice Chotard Committed by Linus Walleij
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pinctrl: abx500: rework error path 



At several places, return value was not tested
and error output was missing.

Signed-off-by: default avatarPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent acd260b0

drivers/pinctrl/pinctrl-abx500.c

+87 −27
Original line number Diff line number Diff line
@@ -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;
@@ -310,7 +310,10 @@ static int abx500_gpio_direction_output(struct gpio_chip *chip, 
		ret = abx500_set_pull_updown(pct,

				gpio,

				ABX500_GPIO_PULL_NONE);

		if (ret < 0)

	}

out:

	if (ret < 0) {

		dev_err(pct->dev, "%s failed (%d)\n", __func__, ret);

		return ret;

	}
@@ -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,

			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;

}