mvebu: armada37xx: backport pinctrl fixes

Backport upstream pinctrl fixes, these are required for the follow-up I2C
PXA recovery fixes.

Signed-off-by: Robert Marko <[email protected]>

target/linux/mvebu/patches-6.6/0001-v6.16-pinctrl-armada-37xx-use-correct-OUTPUT_VAL-register-.patch

@@ -0,0 +1,44 @@
+From 947c93eb29c2a581c0b0b6d5f21af3c2b7ff6d25 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:32 +0200
+Subject: [PATCH 1/7] pinctrl: armada-37xx: use correct OUTPUT_VAL register for
+ GPIOs > 31
+
+The controller has two consecutive OUTPUT_VAL registers and both
+holds output value for 32 GPIOs. Due to a missing adjustment, the
+current code always uses the first register while setting the
+output value whereas it should use the second one for GPIOs > 31.
+
+Add the missing armada_37xx_update_reg() call to adjust the register
+according to the 'offset' parameter of the function to fix the issue.
+
+Cc: [email protected]
+Fixes: 6702abb3bf23 ("pinctrl: armada-37xx: Fix direction_output() callback behavior")
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -417,6 +417,7 @@ static int armada_37xx_gpio_direction_ou
+ 					     unsigned int offset, int value)
+ {
+ 	struct armada_37xx_pinctrl *info = gpiochip_get_data(chip);
++	unsigned int val_offset = offset;
+ 	unsigned int reg = OUTPUT_EN;
+ 	unsigned int mask, val, ret;
+ 
+@@ -429,6 +430,8 @@ static int armada_37xx_gpio_direction_ou
+ 		return ret;
+ 
+ 	reg = OUTPUT_VAL;
++	armada_37xx_update_reg(&reg, &val_offset);
++
+ 	val = value ? mask : 0;
+ 	regmap_update_bits(info->regmap, reg, mask, val);
+ 

target/linux/mvebu/patches-6.6/0002-v6.16-pinctrl-armada-37xx-set-GPIO-output-value-before-set.patch

@@ -0,0 +1,58 @@
+From e6ebd4942981f8ad37189bbb36a3c8495e21ef4c Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:33 +0200
+Subject: [PATCH 2/7] pinctrl: armada-37xx: set GPIO output value before
+ setting direction
+
+Changing the direction before updating the output value in the
+OUTPUT_VAL register may result in a glitch on the output line
+if the previous value in the OUTPUT_VAL register is different
+from the one we want to set.
+
+In order to avoid that, update the output value before changing
+the direction.
+
+Cc: [email protected]
+Fixes: 6702abb3bf23 ("pinctrl: armada-37xx: Fix direction_output() callback behavior")
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 15 +++++++--------
+ 1 file changed, 7 insertions(+), 8 deletions(-)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -417,23 +417,22 @@ static int armada_37xx_gpio_direction_ou
+ 					     unsigned int offset, int value)
+ {
+ 	struct armada_37xx_pinctrl *info = gpiochip_get_data(chip);
+-	unsigned int val_offset = offset;
+-	unsigned int reg = OUTPUT_EN;
++	unsigned int en_offset = offset;
++	unsigned int reg = OUTPUT_VAL;
+ 	unsigned int mask, val, ret;
+ 
+ 	armada_37xx_update_reg(&reg, &offset);
+ 	mask = BIT(offset);
++	val = value ? mask : 0;
+ 
+-	ret = regmap_update_bits(info->regmap, reg, mask, mask);
+-
++	ret = regmap_update_bits(info->regmap, reg, mask, val);
+ 	if (ret)
+ 		return ret;
+ 
+-	reg = OUTPUT_VAL;
+-	armada_37xx_update_reg(&reg, &val_offset);
++	reg = OUTPUT_EN;
++	armada_37xx_update_reg(&reg, &en_offset);
+ 
+-	val = value ? mask : 0;
+-	regmap_update_bits(info->regmap, reg, mask, val);
++	regmap_update_bits(info->regmap, reg, mask, mask);
+ 
+ 	return 0;
+ }

target/linux/mvebu/patches-6.6/0003-v6.16-pinctrl-armada-37xx-propagate-error-from-armada_37xx.patch

@@ -0,0 +1,31 @@
+From 0396a8731efd17aec4719ad9981fefeaa13ffa56 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:34 +0200
+Subject: [PATCH 3/7] pinctrl: armada-37xx: propagate error from
+ armada_37xx_gpio_direction_output()
+
+The regmap_update_bits() function can fail, so propagate its error
+up to the stack instead of silently ignoring that.
+
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -432,9 +432,7 @@ static int armada_37xx_gpio_direction_ou
+ 	reg = OUTPUT_EN;
+ 	armada_37xx_update_reg(&reg, &en_offset);
+ 
+-	regmap_update_bits(info->regmap, reg, mask, mask);
+-
+-	return 0;
++	return regmap_update_bits(info->regmap, reg, mask, mask);
+ }
+ 
+ static int armada_37xx_gpio_get(struct gpio_chip *chip, unsigned int offset)

target/linux/mvebu/patches-6.6/0004-v6.16-pinctrl-armada-37xx-propagate-error-from-armada_37xx.patch

@@ -0,0 +1,36 @@
+From 57273ff8bb16f3842c2597b5bbcd49e7fa12edf7 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:35 +0200
+Subject: [PATCH 4/7] pinctrl: armada-37xx: propagate error from
+ armada_37xx_gpio_get()
+
+The regmap_read() function can fail, so propagate its error up to
+the stack instead of silently ignoring that.
+
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -440,11 +440,14 @@ static int armada_37xx_gpio_get(struct g
+ 	struct armada_37xx_pinctrl *info = gpiochip_get_data(chip);
+ 	unsigned int reg = INPUT_VAL;
+ 	unsigned int val, mask;
++	int ret;
+ 
+ 	armada_37xx_update_reg(&reg, &offset);
+ 	mask = BIT(offset);
+ 
+-	regmap_read(info->regmap, reg, &val);
++	ret = regmap_read(info->regmap, reg, &val);
++	if (ret)
++		return ret;
+ 
+ 	return (val & mask) != 0;
+ }

target/linux/mvebu/patches-6.6/0005-v6.16-pinctrl-armada-37xx-propagate-error-from-armada_37xx.patch

@@ -0,0 +1,42 @@
+From bfa0ff804ffa8b1246ade8be08de98c9eb19d16f Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:36 +0200
+Subject: [PATCH 5/7] pinctrl: armada-37xx: propagate error from
+ armada_37xx_pmx_gpio_set_direction()
+
+The armada_37xx_gpio_direction_{in,out}put() functions can fail, so
+propagate their error values back to the stack instead of silently
+ignoring those.
+
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -472,16 +472,17 @@ static int armada_37xx_pmx_gpio_set_dire
+ {
+ 	struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+ 	struct gpio_chip *chip = range->gc;
++	int ret;
+ 
+ 	dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
+ 		offset, range->name, offset, input ? "input" : "output");
+ 
+ 	if (input)
+-		armada_37xx_gpio_direction_input(chip, offset);
++		ret = armada_37xx_gpio_direction_input(chip, offset);
+ 	else
+-		armada_37xx_gpio_direction_output(chip, offset, 0);
++		ret = armada_37xx_gpio_direction_output(chip, offset, 0);
+ 
+-	return 0;
++	return ret;
+ }
+ 
+ static int armada_37xx_gpio_request_enable(struct pinctrl_dev *pctldev,

target/linux/mvebu/patches-6.6/0006-v6.16-pinctrl-armada-37xx-propagate-error-from-armada_37xx.patch

@@ -0,0 +1,35 @@
+From 6481c0a83367b0672951ccc876fbae7ee37b594b Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:37 +0200
+Subject: [PATCH 6/7] pinctrl: armada-37xx: propagate error from
+ armada_37xx_gpio_get_direction()
+
+The regmap_read() function can fail, so propagate its error up to
+the stack instead of silently ignoring that.
+
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -402,10 +402,13 @@ static int armada_37xx_gpio_get_directio
+ 	struct armada_37xx_pinctrl *info = gpiochip_get_data(chip);
+ 	unsigned int reg = OUTPUT_EN;
+ 	unsigned int val, mask;
++	int ret;
+ 
+ 	armada_37xx_update_reg(&reg, &offset);
+ 	mask = BIT(offset);
+-	regmap_read(info->regmap, reg, &val);
++	ret = regmap_read(info->regmap, reg, &val);
++	if (ret)
++		return ret;
+ 
+ 	if (val & mask)
+ 		return GPIO_LINE_DIRECTION_OUT;

target/linux/mvebu/patches-6.6/0007-v6.16-pinctrl-armada-37xx-propagate-error-from-armada_37xx.patch

@@ -0,0 +1,31 @@
+From 4229c28323db141eda69cb99427be75d3edba071 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <[email protected]>
+Date: Wed, 14 May 2025 21:18:38 +0200
+Subject: [PATCH 7/7] pinctrl: armada-37xx: propagate error from
+ armada_37xx_pmx_set_by_name()
+
+The regmap_update_bits() function can fail, so propagate its error
+up to the stack instead of silently ignoring that.
+
+Signed-off-by: Imre Kaloz <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: Gabor Juhos <[email protected]>
+Link: https://lore.kernel.org/[email protected]
+Signed-off-by: Linus Walleij <[email protected]>
+---
+ drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
++++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+@@ -358,9 +358,7 @@ static int armada_37xx_pmx_set_by_name(s
+ 
+ 	val = grp->val[func];
+ 
+-	regmap_update_bits(info->regmap, reg, mask, val);
+-
+-	return 0;
++	return regmap_update_bits(info->regmap, reg, mask, val);
+ }
+ 
+ static int armada_37xx_pmx_set(struct pinctrl_dev *pctldev,