[PATCH v3 0/3] pinctrl: at91: allow disabled gpio controllers

[PATCH v3 0/3] pinctrl: at91: allow disabled gpio controllers

[Ludovic Desroches]

Hi,

Changes from v2:
- I have taken Jean-Christophe patch and squash some parts of my previous
patch since probe fails

Jean-Christophe PLAGNIOL-VILLARD (1):
  pinctrl: at91: allow to have disabled gpio bank

Ludovic Desroches (2):
  ARM: at91/dt: sama5d4: add pioD controller
  MAINTAINERS: add maintainer for pinctrl-at91

 MAINTAINERS                    |   1 +
 arch/arm/boot/dts/sama5d4.dtsi |  13 +++++
 drivers/pinctrl/pinctrl-at91.c | 108 +++++++++++++++++++++--------------------
 3 files changed, 69 insertions(+), 53 deletions(-)

-- 
2.2.0

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[PATCH v3 0/3] pinctrl: at91: allow disabled gpio controllers

[Ludovic Desroches]

Hi,

Changes from v2:
- I have taken Jean-Christophe patch and squash some parts of my previous
patch since probe fails

Jean-Christophe PLAGNIOL-VILLARD (1):
  pinctrl: at91: allow to have disabled gpio bank

Ludovic Desroches (2):
  ARM: at91/dt: sama5d4: add pioD controller
  MAINTAINERS: add maintainer for pinctrl-at91

 MAINTAINERS                    |   1 +
 arch/arm/boot/dts/sama5d4.dtsi |  13 +++++
 drivers/pinctrl/pinctrl-at91.c | 108 +++++++++++++++++++++--------------------
 3 files changed, 69 insertions(+), 53 deletions(-)

-- 
2.2.0

[PATCH v3 1/3] pinctrl: at91: allow to have disabled gpio bank

[Ludovic Desroches]

From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Today we expect that all the bank are enabled, and count the number of banks
used by the pinctrl based on it instead of using the last bank id enabled.

So switch to it, set the chained IRQ at runtime based on enabled banks
and wait only the number of enabled gpio controllers at probe time.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Cc: <stable@vger.kernel.org> # 3.18
---
 drivers/pinctrl/pinctrl-at91.c | 108 +++++++++++++++++++++--------------------
 1 file changed, 55 insertions(+), 53 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index dfd021e..f4cd0b9 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -177,7 +177,7 @@ struct at91_pinctrl {
 	struct device		*dev;
 	struct pinctrl_dev	*pctl;
 
-	int			nbanks;
+	int			nactive_banks;
 
 	uint32_t		*mux_mask;
 	int			nmux;
@@ -653,12 +653,18 @@ static int pin_check_config(struct at91_pinctrl *info, const char *name,
 	int mux;
 
 	/* check if it's a valid config */
-	if (pin->bank >= info->nbanks) {
+	if (pin->bank >= gpio_banks) {
 		dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
-			name, index, pin->bank, info->nbanks);
+			name, index, pin->bank, gpio_banks);
 		return -EINVAL;
 	}
 
+	if (!gpio_chips[pin->bank]) {
+		dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n",
+			name, index, pin->bank);
+		return -ENXIO;
+	}
+
 	if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
 		dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
 			name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
@@ -981,7 +987,8 @@ static void at91_pinctrl_child_count(struct at91_pinctrl *info,
 
 	for_each_child_of_node(np, child) {
 		if (of_device_is_compatible(child, gpio_compat)) {
-			info->nbanks++;
+			if (of_device_is_available(child))
+				info->nactive_banks++;
 		} else {
 			info->nfunctions++;
 			info->ngroups += of_get_child_count(child);
@@ -1003,11 +1010,11 @@ static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
 	}
 
 	size /= sizeof(*list);
-	if (!size || size % info->nbanks) {
-		dev_err(info->dev, "wrong mux mask array should be by %d\n", info->nbanks);
+	if (!size || size % gpio_banks) {
+		dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks);
 		return -EINVAL;
 	}
-	info->nmux = size / info->nbanks;
+	info->nmux = size / gpio_banks;
 
 	info->mux_mask = devm_kzalloc(info->dev, sizeof(u32) * size, GFP_KERNEL);
 	if (!info->mux_mask) {
@@ -1131,7 +1138,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 		of_match_device(at91_pinctrl_of_match, &pdev->dev)->data;
 	at91_pinctrl_child_count(info, np);
 
-	if (info->nbanks < 1) {
+	if (gpio_banks < 1) {
 		dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n");
 		return -EINVAL;
 	}
@@ -1144,7 +1151,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 
 	dev_dbg(&pdev->dev, "mux-mask\n");
 	tmp = info->mux_mask;
-	for (i = 0; i < info->nbanks; i++) {
+	for (i = 0; i < gpio_banks; i++) {
 		for (j = 0; j < info->nmux; j++, tmp++) {
 			dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
 		}
@@ -1162,7 +1169,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 	if (!info->groups)
 		return -ENOMEM;
 
-	dev_dbg(&pdev->dev, "nbanks = %d\n", info->nbanks);
+	dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks);
 	dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
 	dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
 
@@ -1185,7 +1192,7 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 {
 	struct at91_pinctrl *info;
 	struct pinctrl_pin_desc *pdesc;
-	int ret, i, j, k;
+	int ret, i, j, k, ngpio_chips_enabled = 0;
 
 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
@@ -1200,23 +1207,27 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 	 * to obtain references to the struct gpio_chip * for them, and we
 	 * need this to proceed.
 	 */
-	for (i = 0; i < info->nbanks; i++) {
-		if (!gpio_chips[i]) {
-			dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i);
-			devm_kfree(&pdev->dev, info);
-			return -EPROBE_DEFER;
-		}
+	for (i = 0; i < gpio_banks; i++)
+		if (gpio_chips[i])
+			ngpio_chips_enabled++;
+
+	if (ngpio_chips_enabled < info->nactive_banks) {
+		dev_warn(&pdev->dev,
+			 "All GPIO chips are not registered yet (%d/%d)\n",
+			 ngpio_chips_enabled, info->nactive_banks);
+		devm_kfree(&pdev->dev, info);
+		return -EPROBE_DEFER;
 	}
 
 	at91_pinctrl_desc.name = dev_name(&pdev->dev);
-	at91_pinctrl_desc.npins = info->nbanks * MAX_NB_GPIO_PER_BANK;
+	at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
 	at91_pinctrl_desc.pins = pdesc =
 		devm_kzalloc(&pdev->dev, sizeof(*pdesc) * at91_pinctrl_desc.npins, GFP_KERNEL);
 
 	if (!at91_pinctrl_desc.pins)
 		return -ENOMEM;
 
-	for (i = 0 , k = 0; i < info->nbanks; i++) {
+	for (i = 0, k = 0; i < gpio_banks; i++) {
 		for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
 			pdesc->number = k;
 			pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j);
@@ -1234,8 +1245,9 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 	}
 
 	/* We will handle a range of GPIO pins */
-	for (i = 0; i < info->nbanks; i++)
-		pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
+	for (i = 0; i < gpio_banks; i++)
+		if (gpio_chips[i])
+			pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
 
 	dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
 
@@ -1613,9 +1625,10 @@ static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
 static int at91_gpio_of_irq_setup(struct platform_device *pdev,
 				  struct at91_gpio_chip *at91_gpio)
 {
+	struct gpio_chip	*gpiochip_prev = NULL;
 	struct at91_gpio_chip   *prev = NULL;
 	struct irq_data		*d = irq_get_irq_data(at91_gpio->pioc_virq);
-	int ret;
+	int ret, i;
 
 	at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
 
@@ -1641,24 +1654,33 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
 		return ret;
 	}
 
-	/* Setup chained handler */
-	if (at91_gpio->pioc_idx)
-		prev = gpio_chips[at91_gpio->pioc_idx - 1];
-
 	/* The top level handler handles one bank of GPIOs, except
 	 * on some SoC it can handle up to three...
 	 * We only set up the handler for the first of the list.
 	 */
-	if (prev && prev->next == at91_gpio)
+	gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq);
+	if (!gpiochip_prev) {
+		/* Then register the chain on the parent IRQ */
+		gpiochip_set_chained_irqchip(&at91_gpio->chip,
+					     &gpio_irqchip,
+					     at91_gpio->pioc_virq,
+					     gpio_irq_handler);
 		return 0;
+	}
 
-	/* Then register the chain on the parent IRQ */
-	gpiochip_set_chained_irqchip(&at91_gpio->chip,
-				     &gpio_irqchip,
-				     at91_gpio->pioc_virq,
-				     gpio_irq_handler);
+	prev = container_of(gpiochip_prev, struct at91_gpio_chip, chip);
 
-	return 0;
+	/* we can only have 2 banks before */
+	for (i = 0; i < 2; i++) {
+		if (prev->next) {
+			prev = prev->next;
+		} else {
+			prev->next = at91_gpio;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
 }
 
 /* This structure is replicated for each GPIO block allocated at probe time */
@@ -1675,24 +1697,6 @@ static struct gpio_chip at91_gpio_template = {
 	.ngpio			= MAX_NB_GPIO_PER_BANK,
 };
 
-static void at91_gpio_probe_fixup(void)
-{
-	unsigned i;
-	struct at91_gpio_chip *at91_gpio, *last = NULL;
-
-	for (i = 0; i < gpio_banks; i++) {
-		at91_gpio = gpio_chips[i];
-
-		/*
-		 * GPIO controller are grouped on some SoC:
-		 * PIOC, PIOD and PIOE can share the same IRQ line
-		 */
-		if (last && last->pioc_virq == at91_gpio->pioc_virq)
-			last->next = at91_gpio;
-		last = at91_gpio;
-	}
-}
-
 static struct of_device_id at91_gpio_of_match[] = {
 	{ .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
 	{ .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
@@ -1805,8 +1809,6 @@ static int at91_gpio_probe(struct platform_device *pdev)
 	gpio_chips[alias_idx] = at91_chip;
 	gpio_banks = max(gpio_banks, alias_idx + 1);
 
-	at91_gpio_probe_fixup();
-
 	ret = at91_gpio_of_irq_setup(pdev, at91_chip);
 	if (ret)
 		goto irq_setup_err;
-- 
2.2.0

[PATCH v3 1/3] pinctrl: at91: allow to have disabled gpio bank

[Ludovic Desroches]

From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Today we expect that all the bank are enabled, and count the number of banks
used by the pinctrl based on it instead of using the last bank id enabled.

So switch to it, set the chained IRQ at runtime based on enabled banks
and wait only the number of enabled gpio controllers at probe time.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Cc: <stable@vger.kernel.org> # 3.18
---
 drivers/pinctrl/pinctrl-at91.c | 108 +++++++++++++++++++++--------------------
 1 file changed, 55 insertions(+), 53 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index dfd021e..f4cd0b9 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -177,7 +177,7 @@ struct at91_pinctrl {
 	struct device		*dev;
 	struct pinctrl_dev	*pctl;
 
-	int			nbanks;
+	int			nactive_banks;
 
 	uint32_t		*mux_mask;
 	int			nmux;
@@ -653,12 +653,18 @@ static int pin_check_config(struct at91_pinctrl *info, const char *name,
 	int mux;
 
 	/* check if it's a valid config */
-	if (pin->bank >= info->nbanks) {
+	if (pin->bank >= gpio_banks) {
 		dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
-			name, index, pin->bank, info->nbanks);
+			name, index, pin->bank, gpio_banks);
 		return -EINVAL;
 	}
 
+	if (!gpio_chips[pin->bank]) {
+		dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n",
+			name, index, pin->bank);
+		return -ENXIO;
+	}
+
 	if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
 		dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
 			name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
@@ -981,7 +987,8 @@ static void at91_pinctrl_child_count(struct at91_pinctrl *info,
 
 	for_each_child_of_node(np, child) {
 		if (of_device_is_compatible(child, gpio_compat)) {
-			info->nbanks++;
+			if (of_device_is_available(child))
+				info->nactive_banks++;
 		} else {
 			info->nfunctions++;
 			info->ngroups += of_get_child_count(child);
@@ -1003,11 +1010,11 @@ static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
 	}
 
 	size /= sizeof(*list);
-	if (!size || size % info->nbanks) {
-		dev_err(info->dev, "wrong mux mask array should be by %d\n", info->nbanks);
+	if (!size || size % gpio_banks) {
+		dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks);
 		return -EINVAL;
 	}
-	info->nmux = size / info->nbanks;
+	info->nmux = size / gpio_banks;
 
 	info->mux_mask = devm_kzalloc(info->dev, sizeof(u32) * size, GFP_KERNEL);
 	if (!info->mux_mask) {
@@ -1131,7 +1138,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 		of_match_device(at91_pinctrl_of_match, &pdev->dev)->data;
 	at91_pinctrl_child_count(info, np);
 
-	if (info->nbanks < 1) {
+	if (gpio_banks < 1) {
 		dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n");
 		return -EINVAL;
 	}
@@ -1144,7 +1151,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 
 	dev_dbg(&pdev->dev, "mux-mask\n");
 	tmp = info->mux_mask;
-	for (i = 0; i < info->nbanks; i++) {
+	for (i = 0; i < gpio_banks; i++) {
 		for (j = 0; j < info->nmux; j++, tmp++) {
 			dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
 		}
@@ -1162,7 +1169,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
 	if (!info->groups)
 		return -ENOMEM;
 
-	dev_dbg(&pdev->dev, "nbanks = %d\n", info->nbanks);
+	dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks);
 	dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
 	dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
 
@@ -1185,7 +1192,7 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 {
 	struct at91_pinctrl *info;
 	struct pinctrl_pin_desc *pdesc;
-	int ret, i, j, k;
+	int ret, i, j, k, ngpio_chips_enabled = 0;
 
 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
@@ -1200,23 +1207,27 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 	 * to obtain references to the struct gpio_chip * for them, and we
 	 * need this to proceed.
 	 */
-	for (i = 0; i < info->nbanks; i++) {
-		if (!gpio_chips[i]) {
-			dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i);
-			devm_kfree(&pdev->dev, info);
-			return -EPROBE_DEFER;
-		}
+	for (i = 0; i < gpio_banks; i++)
+		if (gpio_chips[i])
+			ngpio_chips_enabled++;
+
+	if (ngpio_chips_enabled < info->nactive_banks) {
+		dev_warn(&pdev->dev,
+			 "All GPIO chips are not registered yet (%d/%d)\n",
+			 ngpio_chips_enabled, info->nactive_banks);
+		devm_kfree(&pdev->dev, info);
+		return -EPROBE_DEFER;
 	}
 
 	at91_pinctrl_desc.name = dev_name(&pdev->dev);
-	at91_pinctrl_desc.npins = info->nbanks * MAX_NB_GPIO_PER_BANK;
+	at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
 	at91_pinctrl_desc.pins = pdesc =
 		devm_kzalloc(&pdev->dev, sizeof(*pdesc) * at91_pinctrl_desc.npins, GFP_KERNEL);
 
 	if (!at91_pinctrl_desc.pins)
 		return -ENOMEM;
 
-	for (i = 0 , k = 0; i < info->nbanks; i++) {
+	for (i = 0, k = 0; i < gpio_banks; i++) {
 		for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
 			pdesc->number = k;
 			pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j);
@@ -1234,8 +1245,9 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 	}
 
 	/* We will handle a range of GPIO pins */
-	for (i = 0; i < info->nbanks; i++)
-		pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
+	for (i = 0; i < gpio_banks; i++)
+		if (gpio_chips[i])
+			pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
 
 	dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
 
@@ -1613,9 +1625,10 @@ static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
 static int at91_gpio_of_irq_setup(struct platform_device *pdev,
 				  struct at91_gpio_chip *at91_gpio)
 {
+	struct gpio_chip	*gpiochip_prev = NULL;
 	struct at91_gpio_chip   *prev = NULL;
 	struct irq_data		*d = irq_get_irq_data(at91_gpio->pioc_virq);
-	int ret;
+	int ret, i;
 
 	at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
 
@@ -1641,24 +1654,33 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
 		return ret;
 	}
 
-	/* Setup chained handler */
-	if (at91_gpio->pioc_idx)
-		prev = gpio_chips[at91_gpio->pioc_idx - 1];
-
 	/* The top level handler handles one bank of GPIOs, except
 	 * on some SoC it can handle up to three...
 	 * We only set up the handler for the first of the list.
 	 */
-	if (prev && prev->next == at91_gpio)
+	gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq);
+	if (!gpiochip_prev) {
+		/* Then register the chain on the parent IRQ */
+		gpiochip_set_chained_irqchip(&at91_gpio->chip,
+					     &gpio_irqchip,
+					     at91_gpio->pioc_virq,
+					     gpio_irq_handler);
 		return 0;
+	}
 
-	/* Then register the chain on the parent IRQ */
-	gpiochip_set_chained_irqchip(&at91_gpio->chip,
-				     &gpio_irqchip,
-				     at91_gpio->pioc_virq,
-				     gpio_irq_handler);
+	prev = container_of(gpiochip_prev, struct at91_gpio_chip, chip);
 
-	return 0;
+	/* we can only have 2 banks before */
+	for (i = 0; i < 2; i++) {
+		if (prev->next) {
+			prev = prev->next;
+		} else {
+			prev->next = at91_gpio;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
 }
 
 /* This structure is replicated for each GPIO block allocated at probe time */
@@ -1675,24 +1697,6 @@ static struct gpio_chip at91_gpio_template = {
 	.ngpio			= MAX_NB_GPIO_PER_BANK,
 };
 
-static void at91_gpio_probe_fixup(void)
-{
-	unsigned i;
-	struct at91_gpio_chip *at91_gpio, *last = NULL;
-
-	for (i = 0; i < gpio_banks; i++) {
-		at91_gpio = gpio_chips[i];
-
-		/*
-		 * GPIO controller are grouped on some SoC:
-		 * PIOC, PIOD and PIOE can share the same IRQ line
-		 */
-		if (last && last->pioc_virq == at91_gpio->pioc_virq)
-			last->next = at91_gpio;
-		last = at91_gpio;
-	}
-}
-
 static struct of_device_id at91_gpio_of_match[] = {
 	{ .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
 	{ .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
@@ -1805,8 +1809,6 @@ static int at91_gpio_probe(struct platform_device *pdev)
 	gpio_chips[alias_idx] = at91_chip;
 	gpio_banks = max(gpio_banks, alias_idx + 1);
 
-	at91_gpio_probe_fixup();
-
 	ret = at91_gpio_of_irq_setup(pdev, at91_chip);
 	if (ret)
 		goto irq_setup_err;
-- 
2.2.0

[PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Ludovic Desroches]

PioD controller was not described in the device tree since we don't use
it. As pinctrl-at91 allows disabled gpio controllers in the device
tree, we can add it to complete the device description.

Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/sama5d4.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/sama5d4.dtsi b/arch/arm/boot/dts/sama5d4.dtsi
index 1b0f30c..368973e 100644
--- a/arch/arm/boot/dts/sama5d4.dtsi
+++ b/arch/arm/boot/dts/sama5d4.dtsi
@@ -62,6 +62,7 @@
 		gpio0 = &pioA;
 		gpio1 = &pioB;
 		gpio2 = &pioC;
+		gpio3 = &pioD;
 		gpio4 = &pioE;
 		tcb0 = &tcb0;
 		tcb1 = &tcb1;
@@ -1111,6 +1112,18 @@
 					clocks = <&pioC_clk>;
 				};
 
+				pioD: gpio@fc068000 {
+					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
+					reg = <0xfc068000 0x100>;
+					interrupts = <5 IRQ_TYPE_LEVEL_HIGH 1>;
+					#gpio-cells = <2>;
+					gpio-controller;
+					interrupt-controller;
+					#interrupt-cells = <2>;
+					clocks = <&pioD_clk>;
+					status = "disabled";
+				};
+
 				pioE: gpio@fc06d000 {
 					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
 					reg = <0xfc06d000 0x100>;
-- 
2.2.0

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[PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Ludovic Desroches]

PioD controller was not described in the device tree since we don't use
it. As pinctrl-at91 allows disabled gpio controllers in the device
tree, we can add it to complete the device description.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
 arch/arm/boot/dts/sama5d4.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/sama5d4.dtsi b/arch/arm/boot/dts/sama5d4.dtsi
index 1b0f30c..368973e 100644
--- a/arch/arm/boot/dts/sama5d4.dtsi
+++ b/arch/arm/boot/dts/sama5d4.dtsi
@@ -62,6 +62,7 @@
 		gpio0 = &pioA;
 		gpio1 = &pioB;
 		gpio2 = &pioC;
+		gpio3 = &pioD;
 		gpio4 = &pioE;
 		tcb0 = &tcb0;
 		tcb1 = &tcb1;
@@ -1111,6 +1112,18 @@
 					clocks = <&pioC_clk>;
 				};
 
+				pioD: gpio at fc068000 {
+					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
+					reg = <0xfc068000 0x100>;
+					interrupts = <5 IRQ_TYPE_LEVEL_HIGH 1>;
+					#gpio-cells = <2>;
+					gpio-controller;
+					interrupt-controller;
+					#interrupt-cells = <2>;
+					clocks = <&pioD_clk>;
+					status = "disabled";
+				};
+
 				pioE: gpio at fc06d000 {
 					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
 					reg = <0xfc06d000 0x100>;
-- 
2.2.0

[PATCH v3 3/3] MAINTAINERS: add maintainer for pinctrl-at91

[Ludovic Desroches]

Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 3589d67..455630d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7406,6 +7406,7 @@ F:	include/linux/pinctrl/
 
 PIN CONTROLLER - ATMEL AT91
 M:	Jean-Christophe Plagniol-Villard <plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org>
+M:	Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
 L:	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org (moderated for non-subscribers)
 S:	Maintained
 F:	drivers/pinctrl/pinctrl-at91.*
-- 
2.2.0

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[PATCH v3 3/3] MAINTAINERS: add maintainer for pinctrl-at91

[Ludovic Desroches]

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 3589d67..455630d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7406,6 +7406,7 @@ F:	include/linux/pinctrl/
 
 PIN CONTROLLER - ATMEL AT91
 M:	Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
+M:	Ludovic Desroches <ludovic.desroches@atmel.com>
 L:	linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	drivers/pinctrl/pinctrl-at91.*
-- 
2.2.0

Re: [PATCH v3 3/3] MAINTAINERS: add maintainer for pinctrl-at91

[Nicolas Ferre]

Le 16/01/2015 16:31, Ludovic Desroches a écrit :
> Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
> ---
>  MAINTAINERS | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 3589d67..455630d 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7406,6 +7406,7 @@ F:	include/linux/pinctrl/
>  
>  PIN CONTROLLER - ATMEL AT91
>  M:	Jean-Christophe Plagniol-Villard <plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org>
> +M:	Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
>  L:	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org (moderated for non-subscribers)
>  S:	Maintained
>  F:	drivers/pinctrl/pinctrl-at91.*

Yes, as I've just said for the v2 of this series:

Acked-by: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>

Thanks, bye,
-- 
Nicolas Ferre
--
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[PATCH v3 3/3] MAINTAINERS: add maintainer for pinctrl-at91

[Nicolas Ferre]

Le 16/01/2015 16:31, Ludovic Desroches a ?crit :
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> ---
>  MAINTAINERS | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 3589d67..455630d 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7406,6 +7406,7 @@ F:	include/linux/pinctrl/
>  
>  PIN CONTROLLER - ATMEL AT91
>  M:	Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
> +M:	Ludovic Desroches <ludovic.desroches@atmel.com>
>  L:	linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
>  S:	Maintained
>  F:	drivers/pinctrl/pinctrl-at91.*

Yes, as I've just said for the v2 of this series:

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, bye,
-- 
Nicolas Ferre

Re: [PATCH v3 1/3] pinctrl: at91: allow to have disabled gpio bank

[Nicolas Ferre]

Le 16/01/2015 16:31, Ludovic Desroches a écrit :
> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> 
> Today we expect that all the bank are enabled, and count the number of banks
> used by the pinctrl based on it instead of using the last bank id enabled.
> 
> So switch to it, set the chained IRQ at runtime based on enabled banks
> and wait only the number of enabled gpio controllers at probe time.
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> 
> Cc: <stable@vger.kernel.org> # 3.18

As I acknowledged a comparable solution previously, and after reading,
this patch seems okay:

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, bye.


> ---
>  drivers/pinctrl/pinctrl-at91.c | 108 +++++++++++++++++++++--------------------
>  1 file changed, 55 insertions(+), 53 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
> index dfd021e..f4cd0b9 100644
> --- a/drivers/pinctrl/pinctrl-at91.c
> +++ b/drivers/pinctrl/pinctrl-at91.c
> @@ -177,7 +177,7 @@ struct at91_pinctrl {
>  	struct device		*dev;
>  	struct pinctrl_dev	*pctl;
>  
> -	int			nbanks;
> +	int			nactive_banks;
>  
>  	uint32_t		*mux_mask;
>  	int			nmux;
> @@ -653,12 +653,18 @@ static int pin_check_config(struct at91_pinctrl *info, const char *name,
>  	int mux;
>  
>  	/* check if it's a valid config */
> -	if (pin->bank >= info->nbanks) {
> +	if (pin->bank >= gpio_banks) {
>  		dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
> -			name, index, pin->bank, info->nbanks);
> +			name, index, pin->bank, gpio_banks);
>  		return -EINVAL;
>  	}
>  
> +	if (!gpio_chips[pin->bank]) {
> +		dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n",
> +			name, index, pin->bank);
> +		return -ENXIO;
> +	}
> +
>  	if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
>  		dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
>  			name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
> @@ -981,7 +987,8 @@ static void at91_pinctrl_child_count(struct at91_pinctrl *info,
>  
>  	for_each_child_of_node(np, child) {
>  		if (of_device_is_compatible(child, gpio_compat)) {
> -			info->nbanks++;
> +			if (of_device_is_available(child))
> +				info->nactive_banks++;
>  		} else {
>  			info->nfunctions++;
>  			info->ngroups += of_get_child_count(child);
> @@ -1003,11 +1010,11 @@ static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
>  	}
>  
>  	size /= sizeof(*list);
> -	if (!size || size % info->nbanks) {
> -		dev_err(info->dev, "wrong mux mask array should be by %d\n", info->nbanks);
> +	if (!size || size % gpio_banks) {
> +		dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks);
>  		return -EINVAL;
>  	}
> -	info->nmux = size / info->nbanks;
> +	info->nmux = size / gpio_banks;
>  
>  	info->mux_mask = devm_kzalloc(info->dev, sizeof(u32) * size, GFP_KERNEL);
>  	if (!info->mux_mask) {
> @@ -1131,7 +1138,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
>  		of_match_device(at91_pinctrl_of_match, &pdev->dev)->data;
>  	at91_pinctrl_child_count(info, np);
>  
> -	if (info->nbanks < 1) {
> +	if (gpio_banks < 1) {
>  		dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n");
>  		return -EINVAL;
>  	}
> @@ -1144,7 +1151,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
>  
>  	dev_dbg(&pdev->dev, "mux-mask\n");
>  	tmp = info->mux_mask;
> -	for (i = 0; i < info->nbanks; i++) {
> +	for (i = 0; i < gpio_banks; i++) {
>  		for (j = 0; j < info->nmux; j++, tmp++) {
>  			dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
>  		}
> @@ -1162,7 +1169,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
>  	if (!info->groups)
>  		return -ENOMEM;
>  
> -	dev_dbg(&pdev->dev, "nbanks = %d\n", info->nbanks);
> +	dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks);
>  	dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
>  	dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
>  
> @@ -1185,7 +1192,7 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
>  {
>  	struct at91_pinctrl *info;
>  	struct pinctrl_pin_desc *pdesc;
> -	int ret, i, j, k;
> +	int ret, i, j, k, ngpio_chips_enabled = 0;
>  
>  	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
>  	if (!info)
> @@ -1200,23 +1207,27 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
>  	 * to obtain references to the struct gpio_chip * for them, and we
>  	 * need this to proceed.
>  	 */
> -	for (i = 0; i < info->nbanks; i++) {
> -		if (!gpio_chips[i]) {
> -			dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i);
> -			devm_kfree(&pdev->dev, info);
> -			return -EPROBE_DEFER;
> -		}
> +	for (i = 0; i < gpio_banks; i++)
> +		if (gpio_chips[i])
> +			ngpio_chips_enabled++;
> +
> +	if (ngpio_chips_enabled < info->nactive_banks) {
> +		dev_warn(&pdev->dev,
> +			 "All GPIO chips are not registered yet (%d/%d)\n",
> +			 ngpio_chips_enabled, info->nactive_banks);
> +		devm_kfree(&pdev->dev, info);
> +		return -EPROBE_DEFER;
>  	}
>  
>  	at91_pinctrl_desc.name = dev_name(&pdev->dev);
> -	at91_pinctrl_desc.npins = info->nbanks * MAX_NB_GPIO_PER_BANK;
> +	at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
>  	at91_pinctrl_desc.pins = pdesc =
>  		devm_kzalloc(&pdev->dev, sizeof(*pdesc) * at91_pinctrl_desc.npins, GFP_KERNEL);
>  
>  	if (!at91_pinctrl_desc.pins)
>  		return -ENOMEM;
>  
> -	for (i = 0 , k = 0; i < info->nbanks; i++) {
> +	for (i = 0, k = 0; i < gpio_banks; i++) {
>  		for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
>  			pdesc->number = k;
>  			pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j);
> @@ -1234,8 +1245,9 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
>  	}
>  
>  	/* We will handle a range of GPIO pins */
> -	for (i = 0; i < info->nbanks; i++)
> -		pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
> +	for (i = 0; i < gpio_banks; i++)
> +		if (gpio_chips[i])
> +			pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
>  
>  	dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
>  
> @@ -1613,9 +1625,10 @@ static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
>  static int at91_gpio_of_irq_setup(struct platform_device *pdev,
>  				  struct at91_gpio_chip *at91_gpio)
>  {
> +	struct gpio_chip	*gpiochip_prev = NULL;
>  	struct at91_gpio_chip   *prev = NULL;
>  	struct irq_data		*d = irq_get_irq_data(at91_gpio->pioc_virq);
> -	int ret;
> +	int ret, i;
>  
>  	at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
>  
> @@ -1641,24 +1654,33 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
>  		return ret;
>  	}
>  
> -	/* Setup chained handler */
> -	if (at91_gpio->pioc_idx)
> -		prev = gpio_chips[at91_gpio->pioc_idx - 1];
> -
>  	/* The top level handler handles one bank of GPIOs, except
>  	 * on some SoC it can handle up to three...
>  	 * We only set up the handler for the first of the list.
>  	 */
> -	if (prev && prev->next == at91_gpio)
> +	gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq);
> +	if (!gpiochip_prev) {
> +		/* Then register the chain on the parent IRQ */
> +		gpiochip_set_chained_irqchip(&at91_gpio->chip,
> +					     &gpio_irqchip,
> +					     at91_gpio->pioc_virq,
> +					     gpio_irq_handler);
>  		return 0;
> +	}
>  
> -	/* Then register the chain on the parent IRQ */
> -	gpiochip_set_chained_irqchip(&at91_gpio->chip,
> -				     &gpio_irqchip,
> -				     at91_gpio->pioc_virq,
> -				     gpio_irq_handler);
> +	prev = container_of(gpiochip_prev, struct at91_gpio_chip, chip);
>  
> -	return 0;
> +	/* we can only have 2 banks before */
> +	for (i = 0; i < 2; i++) {
> +		if (prev->next) {
> +			prev = prev->next;
> +		} else {
> +			prev->next = at91_gpio;
> +			return 0;
> +		}
> +	}
> +
> +	return -EINVAL;
>  }
>  
>  /* This structure is replicated for each GPIO block allocated at probe time */
> @@ -1675,24 +1697,6 @@ static struct gpio_chip at91_gpio_template = {
>  	.ngpio			= MAX_NB_GPIO_PER_BANK,
>  };
>  
> -static void at91_gpio_probe_fixup(void)
> -{
> -	unsigned i;
> -	struct at91_gpio_chip *at91_gpio, *last = NULL;
> -
> -	for (i = 0; i < gpio_banks; i++) {
> -		at91_gpio = gpio_chips[i];
> -
> -		/*
> -		 * GPIO controller are grouped on some SoC:
> -		 * PIOC, PIOD and PIOE can share the same IRQ line
> -		 */
> -		if (last && last->pioc_virq == at91_gpio->pioc_virq)
> -			last->next = at91_gpio;
> -		last = at91_gpio;
> -	}
> -}
> -
>  static struct of_device_id at91_gpio_of_match[] = {
>  	{ .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
>  	{ .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
> @@ -1805,8 +1809,6 @@ static int at91_gpio_probe(struct platform_device *pdev)
>  	gpio_chips[alias_idx] = at91_chip;
>  	gpio_banks = max(gpio_banks, alias_idx + 1);
>  
> -	at91_gpio_probe_fixup();
> -
>  	ret = at91_gpio_of_irq_setup(pdev, at91_chip);
>  	if (ret)
>  		goto irq_setup_err;
> 


-- 
Nicolas Ferre

[PATCH v3 1/3] pinctrl: at91: allow to have disabled gpio bank

[Nicolas Ferre]

Le 16/01/2015 16:31, Ludovic Desroches a ?crit :
> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> 
> Today we expect that all the bank are enabled, and count the number of banks
> used by the pinctrl based on it instead of using the last bank id enabled.
> 
> So switch to it, set the chained IRQ at runtime based on enabled banks
> and wait only the number of enabled gpio controllers at probe time.
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> 
> Cc: <stable@vger.kernel.org> # 3.18

As I acknowledged a comparable solution previously, and after reading,
this patch seems okay:

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks, bye.


> ---
>  drivers/pinctrl/pinctrl-at91.c | 108 +++++++++++++++++++++--------------------
>  1 file changed, 55 insertions(+), 53 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
> index dfd021e..f4cd0b9 100644
> --- a/drivers/pinctrl/pinctrl-at91.c
> +++ b/drivers/pinctrl/pinctrl-at91.c
> @@ -177,7 +177,7 @@ struct at91_pinctrl {
>  	struct device		*dev;
>  	struct pinctrl_dev	*pctl;
>  
> -	int			nbanks;
> +	int			nactive_banks;
>  
>  	uint32_t		*mux_mask;
>  	int			nmux;
> @@ -653,12 +653,18 @@ static int pin_check_config(struct at91_pinctrl *info, const char *name,
>  	int mux;
>  
>  	/* check if it's a valid config */
> -	if (pin->bank >= info->nbanks) {
> +	if (pin->bank >= gpio_banks) {
>  		dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
> -			name, index, pin->bank, info->nbanks);
> +			name, index, pin->bank, gpio_banks);
>  		return -EINVAL;
>  	}
>  
> +	if (!gpio_chips[pin->bank]) {
> +		dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n",
> +			name, index, pin->bank);
> +		return -ENXIO;
> +	}
> +
>  	if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
>  		dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
>  			name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
> @@ -981,7 +987,8 @@ static void at91_pinctrl_child_count(struct at91_pinctrl *info,
>  
>  	for_each_child_of_node(np, child) {
>  		if (of_device_is_compatible(child, gpio_compat)) {
> -			info->nbanks++;
> +			if (of_device_is_available(child))
> +				info->nactive_banks++;
>  		} else {
>  			info->nfunctions++;
>  			info->ngroups += of_get_child_count(child);
> @@ -1003,11 +1010,11 @@ static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
>  	}
>  
>  	size /= sizeof(*list);
> -	if (!size || size % info->nbanks) {
> -		dev_err(info->dev, "wrong mux mask array should be by %d\n", info->nbanks);
> +	if (!size || size % gpio_banks) {
> +		dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks);
>  		return -EINVAL;
>  	}
> -	info->nmux = size / info->nbanks;
> +	info->nmux = size / gpio_banks;
>  
>  	info->mux_mask = devm_kzalloc(info->dev, sizeof(u32) * size, GFP_KERNEL);
>  	if (!info->mux_mask) {
> @@ -1131,7 +1138,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
>  		of_match_device(at91_pinctrl_of_match, &pdev->dev)->data;
>  	at91_pinctrl_child_count(info, np);
>  
> -	if (info->nbanks < 1) {
> +	if (gpio_banks < 1) {
>  		dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n");
>  		return -EINVAL;
>  	}
> @@ -1144,7 +1151,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
>  
>  	dev_dbg(&pdev->dev, "mux-mask\n");
>  	tmp = info->mux_mask;
> -	for (i = 0; i < info->nbanks; i++) {
> +	for (i = 0; i < gpio_banks; i++) {
>  		for (j = 0; j < info->nmux; j++, tmp++) {
>  			dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
>  		}
> @@ -1162,7 +1169,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
>  	if (!info->groups)
>  		return -ENOMEM;
>  
> -	dev_dbg(&pdev->dev, "nbanks = %d\n", info->nbanks);
> +	dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks);
>  	dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
>  	dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
>  
> @@ -1185,7 +1192,7 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
>  {
>  	struct at91_pinctrl *info;
>  	struct pinctrl_pin_desc *pdesc;
> -	int ret, i, j, k;
> +	int ret, i, j, k, ngpio_chips_enabled = 0;
>  
>  	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
>  	if (!info)
> @@ -1200,23 +1207,27 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
>  	 * to obtain references to the struct gpio_chip * for them, and we
>  	 * need this to proceed.
>  	 */
> -	for (i = 0; i < info->nbanks; i++) {
> -		if (!gpio_chips[i]) {
> -			dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i);
> -			devm_kfree(&pdev->dev, info);
> -			return -EPROBE_DEFER;
> -		}
> +	for (i = 0; i < gpio_banks; i++)
> +		if (gpio_chips[i])
> +			ngpio_chips_enabled++;
> +
> +	if (ngpio_chips_enabled < info->nactive_banks) {
> +		dev_warn(&pdev->dev,
> +			 "All GPIO chips are not registered yet (%d/%d)\n",
> +			 ngpio_chips_enabled, info->nactive_banks);
> +		devm_kfree(&pdev->dev, info);
> +		return -EPROBE_DEFER;
>  	}
>  
>  	at91_pinctrl_desc.name = dev_name(&pdev->dev);
> -	at91_pinctrl_desc.npins = info->nbanks * MAX_NB_GPIO_PER_BANK;
> +	at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
>  	at91_pinctrl_desc.pins = pdesc =
>  		devm_kzalloc(&pdev->dev, sizeof(*pdesc) * at91_pinctrl_desc.npins, GFP_KERNEL);
>  
>  	if (!at91_pinctrl_desc.pins)
>  		return -ENOMEM;
>  
> -	for (i = 0 , k = 0; i < info->nbanks; i++) {
> +	for (i = 0, k = 0; i < gpio_banks; i++) {
>  		for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
>  			pdesc->number = k;
>  			pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j);
> @@ -1234,8 +1245,9 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
>  	}
>  
>  	/* We will handle a range of GPIO pins */
> -	for (i = 0; i < info->nbanks; i++)
> -		pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
> +	for (i = 0; i < gpio_banks; i++)
> +		if (gpio_chips[i])
> +			pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
>  
>  	dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
>  
> @@ -1613,9 +1625,10 @@ static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
>  static int at91_gpio_of_irq_setup(struct platform_device *pdev,
>  				  struct at91_gpio_chip *at91_gpio)
>  {
> +	struct gpio_chip	*gpiochip_prev = NULL;
>  	struct at91_gpio_chip   *prev = NULL;
>  	struct irq_data		*d = irq_get_irq_data(at91_gpio->pioc_virq);
> -	int ret;
> +	int ret, i;
>  
>  	at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
>  
> @@ -1641,24 +1654,33 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
>  		return ret;
>  	}
>  
> -	/* Setup chained handler */
> -	if (at91_gpio->pioc_idx)
> -		prev = gpio_chips[at91_gpio->pioc_idx - 1];
> -
>  	/* The top level handler handles one bank of GPIOs, except
>  	 * on some SoC it can handle up to three...
>  	 * We only set up the handler for the first of the list.
>  	 */
> -	if (prev && prev->next == at91_gpio)
> +	gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq);
> +	if (!gpiochip_prev) {
> +		/* Then register the chain on the parent IRQ */
> +		gpiochip_set_chained_irqchip(&at91_gpio->chip,
> +					     &gpio_irqchip,
> +					     at91_gpio->pioc_virq,
> +					     gpio_irq_handler);
>  		return 0;
> +	}
>  
> -	/* Then register the chain on the parent IRQ */
> -	gpiochip_set_chained_irqchip(&at91_gpio->chip,
> -				     &gpio_irqchip,
> -				     at91_gpio->pioc_virq,
> -				     gpio_irq_handler);
> +	prev = container_of(gpiochip_prev, struct at91_gpio_chip, chip);
>  
> -	return 0;
> +	/* we can only have 2 banks before */
> +	for (i = 0; i < 2; i++) {
> +		if (prev->next) {
> +			prev = prev->next;
> +		} else {
> +			prev->next = at91_gpio;
> +			return 0;
> +		}
> +	}
> +
> +	return -EINVAL;
>  }
>  
>  /* This structure is replicated for each GPIO block allocated at probe time */
> @@ -1675,24 +1697,6 @@ static struct gpio_chip at91_gpio_template = {
>  	.ngpio			= MAX_NB_GPIO_PER_BANK,
>  };
>  
> -static void at91_gpio_probe_fixup(void)
> -{
> -	unsigned i;
> -	struct at91_gpio_chip *at91_gpio, *last = NULL;
> -
> -	for (i = 0; i < gpio_banks; i++) {
> -		at91_gpio = gpio_chips[i];
> -
> -		/*
> -		 * GPIO controller are grouped on some SoC:
> -		 * PIOC, PIOD and PIOE can share the same IRQ line
> -		 */
> -		if (last && last->pioc_virq == at91_gpio->pioc_virq)
> -			last->next = at91_gpio;
> -		last = at91_gpio;
> -	}
> -}
> -
>  static struct of_device_id at91_gpio_of_match[] = {
>  	{ .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
>  	{ .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
> @@ -1805,8 +1809,6 @@ static int at91_gpio_probe(struct platform_device *pdev)
>  	gpio_chips[alias_idx] = at91_chip;
>  	gpio_banks = max(gpio_banks, alias_idx + 1);
>  
> -	at91_gpio_probe_fixup();
> -
>  	ret = at91_gpio_of_irq_setup(pdev, at91_chip);
>  	if (ret)
>  		goto irq_setup_err;
> 


-- 
Nicolas Ferre

Re: [PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Nicolas Ferre]

Le 16/01/2015 16:31, Ludovic Desroches a écrit :
> PioD controller was not described in the device tree since we don't use
> it. As pinctrl-at91 allows disabled gpio controllers in the device
> tree, we can add it to complete the device description.
> 
> Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>

Acked-by: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>

Linus,

As there is no dependency with the other patches in the series, I can
take this patch or you can keep it together with the other ones. Just
tell me once we agree all on a solution.

Bye,


> ---
>  arch/arm/boot/dts/sama5d4.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sama5d4.dtsi b/arch/arm/boot/dts/sama5d4.dtsi
> index 1b0f30c..368973e 100644
> --- a/arch/arm/boot/dts/sama5d4.dtsi
> +++ b/arch/arm/boot/dts/sama5d4.dtsi
> @@ -62,6 +62,7 @@
>  		gpio0 = &pioA;
>  		gpio1 = &pioB;
>  		gpio2 = &pioC;
> +		gpio3 = &pioD;
>  		gpio4 = &pioE;
>  		tcb0 = &tcb0;
>  		tcb1 = &tcb1;
> @@ -1111,6 +1112,18 @@
>  					clocks = <&pioC_clk>;
>  				};
>  
> +				pioD: gpio@fc068000 {
> +					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
> +					reg = <0xfc068000 0x100>;
> +					interrupts = <5 IRQ_TYPE_LEVEL_HIGH 1>;
> +					#gpio-cells = <2>;
> +					gpio-controller;
> +					interrupt-controller;
> +					#interrupt-cells = <2>;
> +					clocks = <&pioD_clk>;
> +					status = "disabled";
> +				};
> +
>  				pioE: gpio@fc06d000 {
>  					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
>  					reg = <0xfc06d000 0x100>;
> 


-- 
Nicolas Ferre
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[PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Nicolas Ferre]

Le 16/01/2015 16:31, Ludovic Desroches a ?crit :
> PioD controller was not described in the device tree since we don't use
> it. As pinctrl-at91 allows disabled gpio controllers in the device
> tree, we can add it to complete the device description.
> 
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Linus,

As there is no dependency with the other patches in the series, I can
take this patch or you can keep it together with the other ones. Just
tell me once we agree all on a solution.

Bye,


> ---
>  arch/arm/boot/dts/sama5d4.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sama5d4.dtsi b/arch/arm/boot/dts/sama5d4.dtsi
> index 1b0f30c..368973e 100644
> --- a/arch/arm/boot/dts/sama5d4.dtsi
> +++ b/arch/arm/boot/dts/sama5d4.dtsi
> @@ -62,6 +62,7 @@
>  		gpio0 = &pioA;
>  		gpio1 = &pioB;
>  		gpio2 = &pioC;
> +		gpio3 = &pioD;
>  		gpio4 = &pioE;
>  		tcb0 = &tcb0;
>  		tcb1 = &tcb1;
> @@ -1111,6 +1112,18 @@
>  					clocks = <&pioC_clk>;
>  				};
>  
> +				pioD: gpio at fc068000 {
> +					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
> +					reg = <0xfc068000 0x100>;
> +					interrupts = <5 IRQ_TYPE_LEVEL_HIGH 1>;
> +					#gpio-cells = <2>;
> +					gpio-controller;
> +					interrupt-controller;
> +					#interrupt-cells = <2>;
> +					clocks = <&pioD_clk>;
> +					status = "disabled";
> +				};
> +
>  				pioE: gpio at fc06d000 {
>  					compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
>  					reg = <0xfc06d000 0x100>;
> 


-- 
Nicolas Ferre

Re: [PATCH v3 1/3] pinctrl: at91: allow to have disabled gpio bank

[Linus Walleij]

On Fri, Jan 16, 2015 at 4:31 PM, Ludovic Desroches
<ludovic.desroches@atmel.com> wrote:

> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
>
> Today we expect that all the bank are enabled, and count the number of banks
> used by the pinctrl based on it instead of using the last bank id enabled.
>
> So switch to it, set the chained IRQ at runtime based on enabled banks
> and wait only the number of enabled gpio controllers at probe time.
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> Cc: <stable@vger.kernel.org> # 3.18

Patch applied for fixes with Nicolas' ACK.

Yours,
Linus Walleij

[PATCH v3 1/3] pinctrl: at91: allow to have disabled gpio bank

[Linus Walleij]

On Fri, Jan 16, 2015 at 4:31 PM, Ludovic Desroches
<ludovic.desroches@atmel.com> wrote:

> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
>
> Today we expect that all the bank are enabled, and count the number of banks
> used by the pinctrl based on it instead of using the last bank id enabled.
>
> So switch to it, set the chained IRQ at runtime based on enabled banks
> and wait only the number of enabled gpio controllers at probe time.
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> Cc: <stable@vger.kernel.org> # 3.18

Patch applied for fixes with Nicolas' ACK.

Yours,
Linus Walleij

Re: [PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Linus Walleij]

On Mon, Jan 19, 2015 at 11:46 AM, Nicolas Ferre <nicolas.ferre-AIFe0yeh4nA@public.gmane.orgm> wrote:
> Le 16/01/2015 16:31, Ludovic Desroches a écrit :
>> PioD controller was not described in the device tree since we don't use
>> it. As pinctrl-at91 allows disabled gpio controllers in the device
>> tree, we can add it to complete the device description.
>>
>> Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
>
> Acked-by: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
>
> Linus,
>
> As there is no dependency with the other patches in the series, I can
> take this patch or you can keep it together with the other ones. Just
> tell me once we agree all on a solution.

Please take this patch along with other AT91 stuff upstream
through ARM SoC.
Acked-by: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

Yours,
Linus Walleij
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[PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Linus Walleij]

On Mon, Jan 19, 2015 at 11:46 AM, Nicolas Ferre <nicolas.ferre@atmel.com> wrote:
> Le 16/01/2015 16:31, Ludovic Desroches a ?crit :
>> PioD controller was not described in the device tree since we don't use
>> it. As pinctrl-at91 allows disabled gpio controllers in the device
>> tree, we can add it to complete the device description.
>>
>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
>
> Linus,
>
> As there is no dependency with the other patches in the series, I can
> take this patch or you can keep it together with the other ones. Just
> tell me once we agree all on a solution.

Please take this patch along with other AT91 stuff upstream
through ARM SoC.
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH v3 3/3] MAINTAINERS: add maintainer for pinctrl-at91

[Linus Walleij]

On Fri, Jan 16, 2015 at 4:31 PM, Ludovic Desroches
<ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org> wrote:

> Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>

Dropped for now as J-C says he can handle it.
If a patch queue stacks up I'll revisit the issue.

Yours,
Linus Walleij
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[PATCH v3 3/3] MAINTAINERS: add maintainer for pinctrl-at91

[Linus Walleij]

On Fri, Jan 16, 2015 at 4:31 PM, Ludovic Desroches
<ludovic.desroches@atmel.com> wrote:

> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Dropped for now as J-C says he can handle it.
If a patch queue stacks up I'll revisit the issue.

Yours,
Linus Walleij

Re: [PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Nicolas Ferre]

Le 21/01/2015 10:49, Linus Walleij a écrit :
> On Mon, Jan 19, 2015 at 11:46 AM, Nicolas Ferre <nicolas.ferre@atmel.com> wrote:
>> Le 16/01/2015 16:31, Ludovic Desroches a écrit :
>>> PioD controller was not described in the device tree since we don't use
>>> it. As pinctrl-at91 allows disabled gpio controllers in the device
>>> tree, we can add it to complete the device description.
>>>
>>> Signed-off-by: Ludovic Desroches <ludovic.desroches-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
>>
>> Acked-by: Nicolas Ferre <nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org>
>>
>> Linus,
>>
>> As there is no dependency with the other patches in the series, I can
>> take this patch or you can keep it together with the other ones. Just
>> tell me once we agree all on a solution.
> 
> Please take this patch along with other AT91 stuff upstream
> through ARM SoC.
> Acked-by: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

Ok, it is now stacked on top of our at91-3.20-dt branch and I'll send it
to arm-soc soon.

Thanks, bye.
-- 
Nicolas Ferre
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[PATCH v3 2/3] ARM: at91/dt: sama5d4: add pioD controller

[Nicolas Ferre]

Le 21/01/2015 10:49, Linus Walleij a ?crit :
> On Mon, Jan 19, 2015 at 11:46 AM, Nicolas Ferre <nicolas.ferre@atmel.com> wrote:
>> Le 16/01/2015 16:31, Ludovic Desroches a ?crit :
>>> PioD controller was not described in the device tree since we don't use
>>> it. As pinctrl-at91 allows disabled gpio controllers in the device
>>> tree, we can add it to complete the device description.
>>>
>>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>>
>> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
>>
>> Linus,
>>
>> As there is no dependency with the other patches in the series, I can
>> take this patch or you can keep it together with the other ones. Just
>> tell me once we agree all on a solution.
> 
> Please take this patch along with other AT91 stuff upstream
> through ARM SoC.
> Acked-by: Linus Walleij <linus.walleij@linaro.org>

Ok, it is now stacked on top of our at91-3.20-dt branch and I'll send it
to arm-soc soon.

Thanks, bye.
-- 
Nicolas Ferre