Merge tag 'pinctrl-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
 "This slew of fixes for pin control was noticed and patched up early,
  so to get the annoyance out of the way for -rc1 it would make sense to
  send them already.

   - Fix a build include in the Uniphier driver to keep pace with
     ongoing refactorings.

   - Fix a slew of minor semantic and syntactic issues as well as
     stricting up Kconfig for the new Spreadtrum driver.

   - Fix the GPIO interrupt set-up on the Marvell 37xx Armada as fallout
     for dynamically allocating irq descriptors from the core. (Also
     tagged for stable.)

   - Fix AMD register suspend/resume state spool/unspooling so that
     wakeup works as it should. (Also tagged for stable.)"

* tag 'pinctrl-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl/amd: save pin registers over suspend/resume
  pinctrl: armada-37xx: Fix gpio interrupt setup
  pinctrl: sprd: fix off by one bugs
  pinctrl: sprd: check for allocation failure
  pinctrl: sprd: Restrict PINCTRL_SPRD to ARCH_SPRD or COMPILE_TEST
  pinctrl: sprd: fix build errors and dependencies
  pinctrl: sprd: make three local functions static
  pinctrl: uniphier: include <linux/build_bug.h> instead of <linux/bug.h>

6 files changed, 120 insertions, 34 deletions

diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index b8b6ab072cd0..71b944748304 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -550,9 +550,9 @@ static int armada_37xx_irq_set_wake(struct irq_data *d, unsigned int on)
 	spin_lock_irqsave(&info->irq_lock, flags);
 	val = readl(info->base + reg);
 	if (on)
-		val |= d->mask;
+		val |= (BIT(d->hwirq % GPIO_PER_REG));
 	else
-		val &= ~d->mask;
+		val &= ~(BIT(d->hwirq % GPIO_PER_REG));
 	writel(val, info->base + reg);
 	spin_unlock_irqrestore(&info->irq_lock, flags);
 
@@ -571,10 +571,10 @@ static int armada_37xx_irq_set_type(struct irq_data *d, unsigned int type)
 	val = readl(info->base + reg);
 	switch (type) {
 	case IRQ_TYPE_EDGE_RISING:
-		val &= ~d->mask;
+		val &= ~(BIT(d->hwirq % GPIO_PER_REG));
 		break;
 	case IRQ_TYPE_EDGE_FALLING:
-		val |= d->mask;
+		val |= (BIT(d->hwirq % GPIO_PER_REG));
 		break;
 	default:
 		spin_unlock_irqrestore(&info->irq_lock, flags);
@@ -624,11 +624,27 @@ static void armada_37xx_irq_handler(struct irq_desc *desc)
 	chained_irq_exit(chip, desc);
 }
 
+static unsigned int armada_37xx_irq_startup(struct irq_data *d)
+{
+	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
+	int irq = d->hwirq - chip->irq_base;
+	/*
+	 * The mask field is a "precomputed bitmask for accessing the
+	 * chip registers" which was introduced for the generic
+	 * irqchip framework. As we don't use this framework, we can
+	 * reuse this field for our own usage.
+	 */
+	d->mask = BIT(irq % GPIO_PER_REG);
+
+	armada_37xx_irq_unmask(d);
+
+	return 0;
+}
+
 static int armada_37xx_irqchip_register(struct platform_device *pdev,
 					struct armada_37xx_pinctrl *info)
 {
 	struct device_node *np = info->dev->of_node;
-	int nrirqs = info->data->nr_pins;
 	struct gpio_chip *gc = &info->gpio_chip;
 	struct irq_chip *irqchip = &info->irq_chip;
 	struct resource res;
@@ -666,8 +682,8 @@ static int armada_37xx_irqchip_register(struct platform_device *pdev,
 	irqchip->irq_unmask = armada_37xx_irq_unmask;
 	irqchip->irq_set_wake = armada_37xx_irq_set_wake;
 	irqchip->irq_set_type = armada_37xx_irq_set_type;
+	irqchip->irq_startup = armada_37xx_irq_startup;
 	irqchip->name = info->data->name;
-
 	ret = gpiochip_irqchip_add(gc, irqchip, 0,
 				   handle_edge_irq, IRQ_TYPE_NONE);
 	if (ret) {
@@ -680,19 +696,6 @@ static int armada_37xx_irqchip_register(struct platform_device *pdev,
 	 * controller. But we do not take advantage of this and use
 	 * the chained irq with all of them.
 	 */
-	for (i = 0; i < nrirqs; i++) {
-		struct irq_data *d = irq_get_irq_data(gc->irq_base + i);
-
-		/*
-		 * The mask field is a "precomputed bitmask for
-		 * accessing the chip registers" which was introduced
-		 * for the generic irqchip framework. As we don't use
-		 * this framework, we can reuse this field for our own
-		 * usage.
-		 */
-		d->mask = BIT(i % GPIO_PER_REG);
-	}
-
 	for (i = 0; i < nr_irq_parent; i++) {
 		int irq = irq_of_parse_and_map(np, i);
 
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index 38af1ec2df0c..3f6b34febbf1 100644
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -36,6 +36,7 @@
 #include <linux/pinctrl/pinconf.h>
 #include <linux/pinctrl/pinconf-generic.h>
 
+#include "core.h"
 #include "pinctrl-utils.h"
 #include "pinctrl-amd.h"
 
@@ -725,6 +726,69 @@ static const struct pinconf_ops amd_pinconf_ops = {
 	.pin_config_group_set = amd_pinconf_group_set,
 };
 
+#ifdef CONFIG_PM_SLEEP
+static bool amd_gpio_should_save(struct amd_gpio *gpio_dev, unsigned int pin)
+{
+	const struct pin_desc *pd = pin_desc_get(gpio_dev->pctrl, pin);
+
+	if (!pd)
+		return false;
+
+	/*
+	 * Only restore the pin if it is actually in use by the kernel (or
+	 * by userspace).
+	 */
+	if (pd->mux_owner || pd->gpio_owner ||
+	    gpiochip_line_is_irq(&gpio_dev->gc, pin))
+		return true;
+
+	return false;
+}
+
+int amd_gpio_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct amd_gpio *gpio_dev = platform_get_drvdata(pdev);
+	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
+	int i;
+
+	for (i = 0; i < desc->npins; i++) {
+		int pin = desc->pins[i].number;
+
+		if (!amd_gpio_should_save(gpio_dev, pin))
+			continue;
+
+		gpio_dev->saved_regs[i] = readl(gpio_dev->base + pin*4);
+	}
+
+	return 0;
+}
+
+int amd_gpio_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct amd_gpio *gpio_dev = platform_get_drvdata(pdev);
+	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
+	int i;
+
+	for (i = 0; i < desc->npins; i++) {
+		int pin = desc->pins[i].number;
+
+		if (!amd_gpio_should_save(gpio_dev, pin))
+			continue;
+
+		writel(gpio_dev->saved_regs[i], gpio_dev->base + pin*4);
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops amd_gpio_pm_ops = {
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(amd_gpio_suspend,
+				     amd_gpio_resume)
+};
+#endif
+
 static struct pinctrl_desc amd_pinctrl_desc = {
 	.pins	= kerncz_pins,
 	.npins = ARRAY_SIZE(kerncz_pins),
@@ -764,6 +828,14 @@ static int amd_gpio_probe(struct platform_device *pdev)
 		return irq_base;
 	}
 
+#ifdef CONFIG_PM_SLEEP
+	gpio_dev->saved_regs = devm_kcalloc(&pdev->dev, amd_pinctrl_desc.npins,
+					    sizeof(*gpio_dev->saved_regs),
+					    GFP_KERNEL);
+	if (!gpio_dev->saved_regs)
+		return -ENOMEM;
+#endif
+
 	gpio_dev->pdev = pdev;
 	gpio_dev->gc.direction_input	= amd_gpio_direction_input;
 	gpio_dev->gc.direction_output	= amd_gpio_direction_output;
@@ -853,6 +925,9 @@ static struct platform_driver amd_gpio_driver = {
 	.driver		= {
 		.name	= "amd_gpio",
 		.acpi_match_table = ACPI_PTR(amd_gpio_acpi_match),
+#ifdef CONFIG_PM_SLEEP
+		.pm	= &amd_gpio_pm_ops,
+#endif
 	},
 	.probe		= amd_gpio_probe,
 	.remove		= amd_gpio_remove,
diff --git a/drivers/pinctrl/pinctrl-amd.h b/drivers/pinctrl/pinctrl-amd.h
index 5b1cb965c767..8fa453a59da5 100644
--- a/drivers/pinctrl/pinctrl-amd.h
+++ b/drivers/pinctrl/pinctrl-amd.h
@@ -97,6 +97,7 @@ struct amd_gpio {
 	unsigned int            hwbank_num;
 	struct resource         *res;
 	struct platform_device  *pdev;
+	u32			*saved_regs;
 };
 
 /*  KERNCZ configuration*/
diff --git a/drivers/pinctrl/sprd/Kconfig b/drivers/pinctrl/sprd/Kconfig
index 6f4a7f9ac6fd..bc7f3fab22f1 100644
--- a/drivers/pinctrl/sprd/Kconfig
+++ b/drivers/pinctrl/sprd/Kconfig
@@ -4,6 +4,8 @@
 
 config PINCTRL_SPRD
 	bool "Spreadtrum pinctrl driver"
+	depends on OF
+	depends on ARCH_SPRD || COMPILE_TEST
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF
@@ -13,5 +15,6 @@ config PINCTRL_SPRD
 
 config PINCTRL_SPRD_SC9860
 	bool "Spreadtrum SC9860 pinctrl driver"
+	depends on PINCTRL_SPRD
 	help
 	  Say Y here to enable Spreadtrum SC9860 pinctrl driver
diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
index 7e7b9ac7e836..63529911445c 100644
--- a/drivers/pinctrl/sprd/pinctrl-sprd.c
+++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
@@ -353,13 +353,13 @@ static const struct pinctrl_ops sprd_pctrl_ops = {
 	.dt_free_map = pinctrl_utils_free_map,
 };
 
-int sprd_pmx_get_function_count(struct pinctrl_dev *pctldev)
+static int sprd_pmx_get_function_count(struct pinctrl_dev *pctldev)
 {
 	return PIN_FUNC_MAX;
 }
 
-const char *sprd_pmx_get_function_name(struct pinctrl_dev *pctldev,
-				       unsigned int selector)
+static const char *sprd_pmx_get_function_name(struct pinctrl_dev *pctldev,
+					      unsigned int selector)
 {
 	switch (selector) {
 	case PIN_FUNC_1:
@@ -375,10 +375,10 @@ const char *sprd_pmx_get_function_name(struct pinctrl_dev *pctldev,
 	}
 }
 
-int sprd_pmx_get_function_groups(struct pinctrl_dev *pctldev,
-				 unsigned int selector,
-				 const char * const **groups,
-				 unsigned int * const num_groups)
+static int sprd_pmx_get_function_groups(struct pinctrl_dev *pctldev,
+					unsigned int selector,
+					const char * const **groups,
+					unsigned int * const num_groups)
 {
 	struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
 	struct sprd_pinctrl_soc_info *info = pctl->info;
@@ -400,7 +400,7 @@ static int sprd_pmx_set_mux(struct pinctrl_dev *pctldev,
 	unsigned long reg;
 	unsigned int val = 0;
 
-	if (group_selector > info->ngroups)
+	if (group_selector >= info->ngroups)
 		return -EINVAL;
 
 	switch (func_selector) {
@@ -734,7 +734,7 @@ static int sprd_pinconf_group_get(struct pinctrl_dev *pctldev,
 	struct sprd_pin_group *grp;
 	unsigned int pin_id;
 
-	if (selector > info->ngroups)
+	if (selector >= info->ngroups)
 		return -EINVAL;
 
 	grp = &info->groups[selector];
@@ -753,7 +753,7 @@ static int sprd_pinconf_group_set(struct pinctrl_dev *pctldev,
 	struct sprd_pin_group *grp;
 	int ret, i;
 
-	if (selector > info->ngroups)
+	if (selector >= info->ngroups)
 		return -EINVAL;
 
 	grp = &info->groups[selector];
@@ -813,7 +813,7 @@ static void sprd_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
 	const char *name;
 	int i, ret;
 
-	if (selector > info->ngroups)
+	if (selector >= info->ngroups)
 		return;
 
 	grp = &info->groups[selector];
@@ -1100,12 +1100,16 @@ int sprd_pinctrl_remove(struct platform_device *pdev)
 
 void sprd_pinctrl_shutdown(struct platform_device *pdev)
 {
-	struct pinctrl *pinctl = devm_pinctrl_get(&pdev->dev);
+	struct pinctrl *pinctl;
 	struct pinctrl_state *state;
 
+	pinctl = devm_pinctrl_get(&pdev->dev);
+	if (IS_ERR(pinctl))
+		return;
 	state = pinctrl_lookup_state(pinctl, "shutdown");
-	if (!IS_ERR(state))
-		pinctrl_select_state(pinctl, state);
+	if (IS_ERR(state))
+		return;
+	pinctrl_select_state(pinctl, state);
 }
 
 MODULE_DESCRIPTION("SPREADTRUM Pin Controller Driver");
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
index c075ecb8e5db..0a3d2ac27503 100644
--- a/drivers/pinctrl/uniphier/pinctrl-uniphier.h
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
@@ -17,7 +17,7 @@
 #define __PINCTRL_UNIPHIER_H__
 
 #include <linux/bitops.h>
-#include <linux/bug.h>
+#include <linux/build_bug.h>
 #include <linux/kernel.h>
 #include <linux/types.h>