[PATCH stable 5.4 0/7] pinctrl-bcm2835 gpio-ranges bugfix

[PATCH stable 5.4 0/7] pinctrl-bcm2835 gpio-ranges bugfix

[Florian Fainelli]

Hi all,

This patch series is intended to backport the fix from Phil "pinctrl:
bcm2835: Change init order for gpio hogs" into the 5.4 tree since the
blamed commit:

73345a18d464b ("pinctrl: bcm2835: Pass irqchip when adding gpiochip")

is in 5.4. To get there, I did backport a number of changes in order for
the commit "pinctrl: bcm2835: Change init order for gpio hogs" to apply
cleanly with no hunks.

Those should have no functional impact since we do not have support for
7211 or 2711 in the upstream stable 5.4.

Both the pinctrl *and* the DTS changes must be taken in lockstep
otherwise the GPIO pins are simply not usable unfortunately.

Thanks!

Florian Fainelli (2):
  pinctrl: bcm2835: Match BCM7211 compatible string
  pinctrl: bcm2835: Add support for wake-up interrupts

Phil Elwell (2):
  pinctrl: bcm2835: Change init order for gpio hogs
  ARM: dts: gpio-ranges property is now required

Stefan Wahren (3):
  pinctrl: bcm2835: Drop unused define
  pinctrl: bcm2835: Refactor platform data
  pinctrl: bcm2835: Add support for all GPIOs on BCM2711

 arch/arm/boot/dts/bcm283x.dtsi        |   1 +
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 209 +++++++++++++++++++++-----
 2 files changed, 175 insertions(+), 35 deletions(-)

-- 
2.25.1

[PATCH stable 5.4 1/7] pinctrl: bcm2835: Drop unused define

[Florian Fainelli]

From: Stefan Wahren <stefan.wahren@i2se.com>

commit be30d5de0a5a52c6ee2cc453a51301037ab94aa upstream

There is no usage for this define, so drop it.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1580148908-4863-2-git-send-email-stefan.wahren@i2se.com
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 0de1a3a96984..3fc26389a573 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -40,9 +40,6 @@
 #define BCM2835_NUM_BANKS 2
 #define BCM2835_NUM_IRQS  3
 
-#define BCM2835_PIN_BITMAP_SZ \
-	DIV_ROUND_UP(BCM2835_NUM_GPIOS, sizeof(unsigned long) * 8)
-
 /* GPIO register offsets */
 #define GPFSEL0		0x0	/* Function Select */
 #define GPSET0		0x1c	/* Pin Output Set */
-- 
2.25.1

[PATCH stable 5.4 2/7] pinctrl: bcm2835: Refactor platform data

[Florian Fainelli]

From: Stefan Wahren <stefan.wahren@i2se.com>

commit 90bfaf028d61a6d523c685b63c2bcc94eebb8057 upstream

This prepares the platform data to be easier to extend for more GPIOs.
Except of this there is no functional change.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1581166975-22949-3-git-send-email-stefan.wahren@i2se.com
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 57 +++++++++++++++++++++------
 1 file changed, 44 insertions(+), 13 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 3fc26389a573..7f0a9c647927 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -82,6 +82,7 @@ struct bcm2835_pinctrl {
 
 	struct pinctrl_dev *pctl_dev;
 	struct gpio_chip gpio_chip;
+	struct pinctrl_desc pctl_desc;
 	struct pinctrl_gpio_range gpio_range;
 
 	raw_spinlock_t irq_lock[BCM2835_NUM_BANKS];
@@ -1051,7 +1052,7 @@ static const struct pinconf_ops bcm2711_pinconf_ops = {
 	.pin_config_set = bcm2711_pinconf_set,
 };
 
-static struct pinctrl_desc bcm2835_pinctrl_desc = {
+static const struct pinctrl_desc bcm2835_pinctrl_desc = {
 	.name = MODULE_NAME,
 	.pins = bcm2835_gpio_pins,
 	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
@@ -1061,19 +1062,47 @@ static struct pinctrl_desc bcm2835_pinctrl_desc = {
 	.owner = THIS_MODULE,
 };
 
-static struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
+static const struct pinctrl_desc bcm2711_pinctrl_desc = {
+	.name = MODULE_NAME,
+	.pins = bcm2835_gpio_pins,
+	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
+	.pctlops = &bcm2835_pctl_ops,
+	.pmxops = &bcm2835_pmx_ops,
+	.confops = &bcm2711_pinconf_ops,
+	.owner = THIS_MODULE,
+};
+
+static const struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
 	.name = MODULE_NAME,
 	.npins = BCM2835_NUM_GPIOS,
 };
 
+struct bcm_plat_data {
+	const struct gpio_chip *gpio_chip;
+	const struct pinctrl_desc *pctl_desc;
+	const struct pinctrl_gpio_range *gpio_range;
+};
+
+static const struct bcm_plat_data bcm2835_plat_data = {
+	.gpio_chip = &bcm2835_gpio_chip,
+	.pctl_desc = &bcm2835_pinctrl_desc,
+	.gpio_range = &bcm2835_pinctrl_gpio_range,
+};
+
+static const struct bcm_plat_data bcm2711_plat_data = {
+	.gpio_chip = &bcm2835_gpio_chip,
+	.pctl_desc = &bcm2711_pinctrl_desc,
+	.gpio_range = &bcm2835_pinctrl_gpio_range,
+};
+
 static const struct of_device_id bcm2835_pinctrl_match[] = {
 	{
 		.compatible = "brcm,bcm2835-gpio",
-		.data = &bcm2835_pinconf_ops,
+		.data = &bcm2835_plat_data,
 	},
 	{
 		.compatible = "brcm,bcm2711-gpio",
-		.data = &bcm2711_pinconf_ops,
+		.data = &bcm2711_plat_data,
 	},
 	{}
 };
@@ -1082,6 +1111,7 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
+	const struct bcm_plat_data *pdata;
 	struct bcm2835_pinctrl *pc;
 	struct gpio_irq_chip *girq;
 	struct resource iomem;
@@ -1108,7 +1138,13 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(pc->base))
 		return PTR_ERR(pc->base);
 
-	pc->gpio_chip = bcm2835_gpio_chip;
+	match = of_match_node(bcm2835_pinctrl_match, pdev->dev.of_node);
+	if (!match)
+		return -EINVAL;
+
+	pdata = match->data;
+
+	pc->gpio_chip = *pdata->gpio_chip;
 	pc->gpio_chip.parent = dev;
 	pc->gpio_chip.of_node = np;
 
@@ -1159,19 +1195,14 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	match = of_match_node(bcm2835_pinctrl_match, pdev->dev.of_node);
-	if (match) {
-		bcm2835_pinctrl_desc.confops =
-			(const struct pinconf_ops *)match->data;
-	}
-
-	pc->pctl_dev = devm_pinctrl_register(dev, &bcm2835_pinctrl_desc, pc);
+	pc->pctl_desc = *pdata->pctl_desc;
+	pc->pctl_dev = devm_pinctrl_register(dev, &pc->pctl_desc, pc);
 	if (IS_ERR(pc->pctl_dev)) {
 		gpiochip_remove(&pc->gpio_chip);
 		return PTR_ERR(pc->pctl_dev);
 	}
 
-	pc->gpio_range = bcm2835_pinctrl_gpio_range;
+	pc->gpio_range = *pdata->gpio_range;
 	pc->gpio_range.base = pc->gpio_chip.base;
 	pc->gpio_range.gc = &pc->gpio_chip;
 	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
-- 
2.25.1

[PATCH stable 5.4 3/7] pinctrl: bcm2835: Add support for all GPIOs on BCM2711

[Florian Fainelli]

From: Stefan Wahren <stefan.wahren@i2se.com>

commit b1d84a3d0a26c5844a22bc09a42704b9371208bb upstream

The BCM2711 supports 58 GPIOs. So extend pinctrl and GPIOs accordingly.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1581166975-22949-4-git-send-email-stefan.wahren@i2se.com
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 54 +++++++++++++++++++++------
 1 file changed, 42 insertions(+), 12 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 7f0a9c647927..061e70ed17a7 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -37,6 +37,7 @@
 
 #define MODULE_NAME "pinctrl-bcm2835"
 #define BCM2835_NUM_GPIOS 54
+#define BCM2711_NUM_GPIOS 58
 #define BCM2835_NUM_BANKS 2
 #define BCM2835_NUM_IRQS  3
 
@@ -78,7 +79,7 @@ struct bcm2835_pinctrl {
 
 	/* note: locking assumes each bank will have its own unsigned long */
 	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
-	unsigned int irq_type[BCM2835_NUM_GPIOS];
+	unsigned int irq_type[BCM2711_NUM_GPIOS];
 
 	struct pinctrl_dev *pctl_dev;
 	struct gpio_chip gpio_chip;
@@ -145,6 +146,10 @@ static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
 	BCM2835_GPIO_PIN(51),
 	BCM2835_GPIO_PIN(52),
 	BCM2835_GPIO_PIN(53),
+	BCM2835_GPIO_PIN(54),
+	BCM2835_GPIO_PIN(55),
+	BCM2835_GPIO_PIN(56),
+	BCM2835_GPIO_PIN(57),
 };
 
 /* one pin per group */
@@ -203,6 +208,10 @@ static const char * const bcm2835_gpio_groups[] = {
 	"gpio51",
 	"gpio52",
 	"gpio53",
+	"gpio54",
+	"gpio55",
+	"gpio56",
+	"gpio57",
 };
 
 enum bcm2835_fsel {
@@ -353,6 +362,22 @@ static const struct gpio_chip bcm2835_gpio_chip = {
 	.can_sleep = false,
 };
 
+static const struct gpio_chip bcm2711_gpio_chip = {
+	.label = "pinctrl-bcm2711",
+	.owner = THIS_MODULE,
+	.request = gpiochip_generic_request,
+	.free = gpiochip_generic_free,
+	.direction_input = bcm2835_gpio_direction_input,
+	.direction_output = bcm2835_gpio_direction_output,
+	.get_direction = bcm2835_gpio_get_direction,
+	.get = bcm2835_gpio_get,
+	.set = bcm2835_gpio_set,
+	.set_config = gpiochip_generic_config,
+	.base = -1,
+	.ngpio = BCM2711_NUM_GPIOS,
+	.can_sleep = false,
+};
+
 static void bcm2835_gpio_irq_handle_bank(struct bcm2835_pinctrl *pc,
 					 unsigned int bank, u32 mask)
 {
@@ -399,7 +424,7 @@ static void bcm2835_gpio_irq_handler(struct irq_desc *desc)
 		bcm2835_gpio_irq_handle_bank(pc, 0, 0xf0000000);
 		bcm2835_gpio_irq_handle_bank(pc, 1, 0x00003fff);
 		break;
-	case 2: /* IRQ2 covers GPIOs 46-53 */
+	case 2: /* IRQ2 covers GPIOs 46-57 */
 		bcm2835_gpio_irq_handle_bank(pc, 1, 0x003fc000);
 		break;
 	}
@@ -618,7 +643,7 @@ static struct irq_chip bcm2835_gpio_irq_chip = {
 
 static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
 {
-	return ARRAY_SIZE(bcm2835_gpio_groups);
+	return BCM2835_NUM_GPIOS;
 }
 
 static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev,
@@ -776,7 +801,7 @@ static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
 		err = of_property_read_u32_index(np, "brcm,pins", i, &pin);
 		if (err)
 			goto out;
-		if (pin >= ARRAY_SIZE(bcm2835_gpio_pins)) {
+		if (pin >= pc->pctl_desc.npins) {
 			dev_err(pc->dev, "%pOF: invalid brcm,pins value %d\n",
 				np, pin);
 			err = -EINVAL;
@@ -852,7 +877,7 @@ static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev,
 {
 	/* every pin can do every function */
 	*groups = bcm2835_gpio_groups;
-	*num_groups = ARRAY_SIZE(bcm2835_gpio_groups);
+	*num_groups = BCM2835_NUM_GPIOS;
 
 	return 0;
 }
@@ -1055,7 +1080,7 @@ static const struct pinconf_ops bcm2711_pinconf_ops = {
 static const struct pinctrl_desc bcm2835_pinctrl_desc = {
 	.name = MODULE_NAME,
 	.pins = bcm2835_gpio_pins,
-	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
+	.npins = BCM2835_NUM_GPIOS,
 	.pctlops = &bcm2835_pctl_ops,
 	.pmxops = &bcm2835_pmx_ops,
 	.confops = &bcm2835_pinconf_ops,
@@ -1063,9 +1088,9 @@ static const struct pinctrl_desc bcm2835_pinctrl_desc = {
 };
 
 static const struct pinctrl_desc bcm2711_pinctrl_desc = {
-	.name = MODULE_NAME,
+	.name = "pinctrl-bcm2711",
 	.pins = bcm2835_gpio_pins,
-	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
+	.npins = BCM2711_NUM_GPIOS,
 	.pctlops = &bcm2835_pctl_ops,
 	.pmxops = &bcm2835_pmx_ops,
 	.confops = &bcm2711_pinconf_ops,
@@ -1077,6 +1102,11 @@ static const struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
 	.npins = BCM2835_NUM_GPIOS,
 };
 
+static const struct pinctrl_gpio_range bcm2711_pinctrl_gpio_range = {
+	.name = "pinctrl-bcm2711",
+	.npins = BCM2711_NUM_GPIOS,
+};
+
 struct bcm_plat_data {
 	const struct gpio_chip *gpio_chip;
 	const struct pinctrl_desc *pctl_desc;
@@ -1090,9 +1120,9 @@ static const struct bcm_plat_data bcm2835_plat_data = {
 };
 
 static const struct bcm_plat_data bcm2711_plat_data = {
-	.gpio_chip = &bcm2835_gpio_chip,
+	.gpio_chip = &bcm2711_gpio_chip,
 	.pctl_desc = &bcm2711_pinctrl_desc,
-	.gpio_range = &bcm2835_pinctrl_gpio_range,
+	.gpio_range = &bcm2711_pinctrl_gpio_range,
 };
 
 static const struct of_device_id bcm2835_pinctrl_match[] = {
@@ -1118,8 +1148,8 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 	int err, i;
 	const struct of_device_id *match;
 
-	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2835_NUM_GPIOS);
-	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2835_NUM_GPIOS);
+	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2711_NUM_GPIOS);
+	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2711_NUM_GPIOS);
 
 	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
 	if (!pc)
-- 
2.25.1

[PATCH stable 5.4 4/7] pinctrl: bcm2835: Match BCM7211 compatible string

[Florian Fainelli]

commit 562c856f96d22ef1204b0a314bc52e85617199b4 upstream

The BCM7211 SoC uses the same pinconf_ops as the ones defined for the
BCM2711 SoC, match the compatible string and use the correct set of
options.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200531001101.24945-4-f.fainelli@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 061e70ed17a7..e763c680b9c2 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -1134,6 +1134,10 @@ static const struct of_device_id bcm2835_pinctrl_match[] = {
 		.compatible = "brcm,bcm2711-gpio",
 		.data = &bcm2711_plat_data,
 	},
+	{
+		.compatible = "brcm,bcm7211-gpio",
+		.data = &bcm2711_plat_data,
+	},
 	{}
 };
 
-- 
2.25.1

[PATCH stable 5.4 5/7] pinctrl: bcm2835: Add support for wake-up interrupts

[Florian Fainelli]

commit 920fecc1aa4591da27ef9dcb338fc5da86b404d7 upstream

Leverage the IRQCHIP_MASK_ON_SUSPEND flag in order to avoid having to
specifically treat the GPIO interrupts during suspend and resume, and
simply implement an irq_set_wake() callback that is responsible for
enabling the parent wake-up interrupt as a wake-up interrupt.

To avoid allocating unnecessary resources for other chips, the wake-up
interrupts are only initialized if we have a brcm,bcm7211-gpio
compatibility string.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200531001101.24945-5-f.fainelli@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 76 ++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index e763c680b9c2..436184ebd2ef 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -19,6 +19,7 @@
 #include <linux/irq.h>
 #include <linux/irqdesc.h>
 #include <linux/init.h>
+#include <linux/interrupt.h>
 #include <linux/of_address.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
@@ -76,6 +77,7 @@
 struct bcm2835_pinctrl {
 	struct device *dev;
 	void __iomem *base;
+	int *wake_irq;
 
 	/* note: locking assumes each bank will have its own unsigned long */
 	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
@@ -432,6 +434,11 @@ static void bcm2835_gpio_irq_handler(struct irq_desc *desc)
 	chained_irq_exit(host_chip, desc);
 }
 
+static irqreturn_t bcm2835_gpio_wake_irq_handler(int irq, void *dev_id)
+{
+	return IRQ_HANDLED;
+}
+
 static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
 	unsigned reg, unsigned offset, bool enable)
 {
@@ -631,6 +638,34 @@ static void bcm2835_gpio_irq_ack(struct irq_data *data)
 	bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
 }
 
+static int bcm2835_gpio_irq_set_wake(struct irq_data *data, unsigned int on)
+{
+	struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+	struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned int irqgroup;
+	int ret = -EINVAL;
+
+	if (!pc->wake_irq)
+		return ret;
+
+	if (gpio <= 27)
+		irqgroup = 0;
+	else if (gpio >= 28 && gpio <= 45)
+		irqgroup = 1;
+	else if (gpio >= 46 && gpio <= 57)
+		irqgroup = 2;
+	else
+		return ret;
+
+	if (on)
+		ret = enable_irq_wake(pc->wake_irq[irqgroup]);
+	else
+		ret = disable_irq_wake(pc->wake_irq[irqgroup]);
+
+	return ret;
+}
+
 static struct irq_chip bcm2835_gpio_irq_chip = {
 	.name = MODULE_NAME,
 	.irq_enable = bcm2835_gpio_irq_enable,
@@ -639,6 +674,8 @@ static struct irq_chip bcm2835_gpio_irq_chip = {
 	.irq_ack = bcm2835_gpio_irq_ack,
 	.irq_mask = bcm2835_gpio_irq_disable,
 	.irq_unmask = bcm2835_gpio_irq_enable,
+	.irq_set_wake = bcm2835_gpio_irq_set_wake,
+	.flags = IRQCHIP_MASK_ON_SUSPEND,
 };
 
 static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
@@ -1151,6 +1188,7 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 	struct resource iomem;
 	int err, i;
 	const struct of_device_id *match;
+	int is_7211 = 0;
 
 	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2711_NUM_GPIOS);
 	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2711_NUM_GPIOS);
@@ -1177,6 +1215,7 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	pdata = match->data;
+	is_7211 = of_device_is_compatible(np, "brcm,bcm7211-gpio");
 
 	pc->gpio_chip = *pdata->gpio_chip;
 	pc->gpio_chip.parent = dev;
@@ -1211,6 +1250,15 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 				     GFP_KERNEL);
 	if (!girq->parents)
 		return -ENOMEM;
+
+	if (is_7211) {
+		pc->wake_irq = devm_kcalloc(dev, BCM2835_NUM_IRQS,
+					    sizeof(*pc->wake_irq),
+					    GFP_KERNEL);
+		if (!pc->wake_irq)
+			return -ENOMEM;
+	}
+
 	/*
 	 * Use the same handler for all groups: this is necessary
 	 * since we use one gpiochip to cover all lines - the
@@ -1218,8 +1266,34 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 	 * bank that was firing the IRQ and look up the per-group
 	 * and bank data.
 	 */
-	for (i = 0; i < BCM2835_NUM_IRQS; i++)
+	for (i = 0; i < BCM2835_NUM_IRQS; i++) {
+		int len;
+		char *name;
+
 		girq->parents[i] = irq_of_parse_and_map(np, i);
+		if (!is_7211)
+			continue;
+
+		/* Skip over the all banks interrupts */
+		pc->wake_irq[i] = irq_of_parse_and_map(np, i +
+						       BCM2835_NUM_IRQS + 1);
+
+		len = strlen(dev_name(pc->dev)) + 16;
+		name = devm_kzalloc(pc->dev, len, GFP_KERNEL);
+		if (!name)
+			return -ENOMEM;
+
+		snprintf(name, len, "%s:bank%d", dev_name(pc->dev), i);
+
+		/* These are optional interrupts */
+		err = devm_request_irq(dev, pc->wake_irq[i],
+				       bcm2835_gpio_wake_irq_handler,
+				       IRQF_SHARED, name, pc);
+		if (err)
+			dev_warn(dev, "unable to request wake IRQ %d\n",
+				 pc->wake_irq[i]);
+	}
+
 	girq->default_type = IRQ_TYPE_NONE;
 	girq->handler = handle_level_irq;
 
-- 
2.25.1

[PATCH stable 5.4 6/7] pinctrl: bcm2835: Change init order for gpio hogs

[Florian Fainelli]

From: Phil Elwell <phil@raspberrypi.com>

commit 266423e60ea1b953fcc0cd97f3dad85857e434d1 upstream

...and gpio-ranges

pinctrl-bcm2835 is a combined pinctrl/gpio driver. Currently the gpio
side is registered first, but this breaks gpio hogs (which are
configured during gpiochip_add_data). Part of the hog initialisation
is a call to pinctrl_gpio_request, and since the pinctrl driver hasn't
yet been registered this results in an -EPROBE_DEFER from which it can
never recover.

Change the initialisation sequence to register the pinctrl driver
first.

This also solves a similar problem with the gpio-ranges property, which
is required in order for released pins to be returned to inputs.

Fixes: 73345a18d464b ("pinctrl: bcm2835: Pass irqchip when adding gpiochip")
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211206092237.4105895-2-phil@raspberrypi.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 29 +++++++++++++++------------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 436184ebd2ef..fa742535f679 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -1241,6 +1241,18 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 		raw_spin_lock_init(&pc->irq_lock[i]);
 	}
 
+	pc->pctl_desc = *pdata->pctl_desc;
+	pc->pctl_dev = devm_pinctrl_register(dev, &pc->pctl_desc, pc);
+	if (IS_ERR(pc->pctl_dev)) {
+		gpiochip_remove(&pc->gpio_chip);
+		return PTR_ERR(pc->pctl_dev);
+	}
+
+	pc->gpio_range = *pdata->gpio_range;
+	pc->gpio_range.base = pc->gpio_chip.base;
+	pc->gpio_range.gc = &pc->gpio_chip;
+	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
+
 	girq = &pc->gpio_chip.irq;
 	girq->chip = &bcm2835_gpio_irq_chip;
 	girq->parent_handler = bcm2835_gpio_irq_handler;
@@ -1248,8 +1260,10 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 	girq->parents = devm_kcalloc(dev, BCM2835_NUM_IRQS,
 				     sizeof(*girq->parents),
 				     GFP_KERNEL);
-	if (!girq->parents)
+	if (!girq->parents) {
+		pinctrl_remove_gpio_range(pc->pctl_dev, &pc->gpio_range);
 		return -ENOMEM;
+	}
 
 	if (is_7211) {
 		pc->wake_irq = devm_kcalloc(dev, BCM2835_NUM_IRQS,
@@ -1300,21 +1314,10 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
 	err = gpiochip_add_data(&pc->gpio_chip, pc);
 	if (err) {
 		dev_err(dev, "could not add GPIO chip\n");
+		pinctrl_remove_gpio_range(pc->pctl_dev, &pc->gpio_range);
 		return err;
 	}
 
-	pc->pctl_desc = *pdata->pctl_desc;
-	pc->pctl_dev = devm_pinctrl_register(dev, &pc->pctl_desc, pc);
-	if (IS_ERR(pc->pctl_dev)) {
-		gpiochip_remove(&pc->gpio_chip);
-		return PTR_ERR(pc->pctl_dev);
-	}
-
-	pc->gpio_range = *pdata->gpio_range;
-	pc->gpio_range.base = pc->gpio_chip.base;
-	pc->gpio_range.gc = &pc->gpio_chip;
-	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
-
 	return 0;
 }
 
-- 
2.25.1

[PATCH stable 5.4 7/7] ARM: dts: gpio-ranges property is now required

[Florian Fainelli]

From: Phil Elwell <phil@raspberrypi.com>

commit c8013355ead68dce152cf426686f8a5f80d88b40 upstream

Since [1], added in 5.7, the absence of a gpio-ranges property has
prevented GPIOs from being restored to inputs when released.
Add those properties for BCM283x and BCM2711 devices.

[1] commit 2ab73c6d8323 ("gpio: Support GPIO controllers without
    pin-ranges")

Link: https://lore.kernel.org/r/20220104170247.956760-1-linus.walleij@linaro.org
Fixes: 2ab73c6d8323 ("gpio: Support GPIO controllers without pin-ranges")
Fixes: 266423e60ea1 ("pinctrl: bcm2835: Change init order for gpio hogs")
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Reported-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20211206092237.4105895-3-phil@raspberrypi.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
[florian: Remove bcm2711.dtsi hunk which does not exist in 5.4]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/boot/dts/bcm283x.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
index 50c64146d492..af81f386793c 100644
--- a/arch/arm/boot/dts/bcm283x.dtsi
+++ b/arch/arm/boot/dts/bcm283x.dtsi
@@ -183,6 +183,7 @@
 
 			interrupt-controller;
 			#interrupt-cells = <2>;
+			gpio-ranges = <&gpio 0 0 54>;
 
 			/* Defines pin muxing groups according to
 			 * BCM2835-ARM-Peripherals.pdf page 102.
-- 
2.25.1

Re: [PATCH stable 5.4 0/7] pinctrl-bcm2835 gpio-ranges bugfix

[Greg KH]

On Tue, Jan 25, 2022 at 11:42:15AM -0800, Florian Fainelli wrote:
> Hi all,
> 
> This patch series is intended to backport the fix from Phil "pinctrl:
> bcm2835: Change init order for gpio hogs" into the 5.4 tree since the
> blamed commit:
> 
> 73345a18d464b ("pinctrl: bcm2835: Pass irqchip when adding gpiochip")
> 
> is in 5.4. To get there, I did backport a number of changes in order for
> the commit "pinctrl: bcm2835: Change init order for gpio hogs" to apply
> cleanly with no hunks.
> 
> Those should have no functional impact since we do not have support for
> 7211 or 2711 in the upstream stable 5.4.
> 
> Both the pinctrl *and* the DTS changes must be taken in lockstep
> otherwise the GPIO pins are simply not usable unfortunately.
> 
> Thanks!
> 
> Florian Fainelli (2):
>   pinctrl: bcm2835: Match BCM7211 compatible string
>   pinctrl: bcm2835: Add support for wake-up interrupts
> 
> Phil Elwell (2):
>   pinctrl: bcm2835: Change init order for gpio hogs
>   ARM: dts: gpio-ranges property is now required
> 
> Stefan Wahren (3):
>   pinctrl: bcm2835: Drop unused define
>   pinctrl: bcm2835: Refactor platform data
>   pinctrl: bcm2835: Add support for all GPIOs on BCM2711
> 
>  arch/arm/boot/dts/bcm283x.dtsi        |   1 +
>  drivers/pinctrl/bcm/pinctrl-bcm2835.c | 209 +++++++++++++++++++++-----
>  2 files changed, 175 insertions(+), 35 deletions(-)
> 
> -- 
> 2.25.1
> 

All now queued up, thanks.

greg k-h