Merge tag 'pinctrl-v5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "It is pretty calm and chill in pin control for the moment. Just
  incremental development.

  There is an odd patch to the Super-H architecture, it's coming from
  the maintainers so should be fine.

  Summary:

  New drivers:
   - Bitmain BM1880 pin controller
   - Mediatek MT8516
   - Cirrus Logich Lochnagar PMIC pins

  Updates:
   - Incremental development on Renesas SH-PFC
   - Incremental development on Intel pin controller and some particular
     updates for Cedarfork.
   - Pin configuration support in Allwinner SunXi drivers
   - Suspend/resume support in the NXP/Freescale i.MX8MQ driver
   - Support for more packaging of the ST Micro STM32"

* tag 'pinctrl-v5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (72 commits)
  pinctrl: mcp23s08: Do not complain about unsupported params
  pinctrl: Rework Kconfig dependency for BM1880 pinctrl driver
  MAINTAINERS: Add entry for BM1880 pinctrl
  pinctrl: Add pinctrl support for BM1880 SoC
  dt-bindings: pinctrl: Add BM1880 pinctrl binding
  pinctrl: stm32: check irq controller availability at probe
  pinctrl: mediatek: Add MT8516 Pinctrl driver
  pinctrl: zte: fix leaked of_node references
  pinctrl: intel: Increase readability of intel_gpio_update_pad_mode()
  pinctrl: intel: Retain HOSTSW_OWN for requested gpio pin
  pinctrl: pistachio: fix leaked of_node references
  pinctrl: sunxi: Support I/O bias voltage setting on H6
  pinctrl: sunxi: Prepare for alternative bias voltage setting methods
  pinctrl: st: fix leaked of_node references
  pinctrl: samsung: fix leaked of_node references
  pinctrl: stm32: align stm32mp157 pin names
  pinctrl: stm32: add package information for stm32mp157c
  pinctrl: stm32: introduce package support
  dt-bindings: pinctrl: stm32: add new entry for package information
  pinctrl: imx8mq: Add suspend/resume ops
  ...

1 files changed, 61 insertions, 5 deletions

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 3b1818184207..d7acbb79cdf7 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -81,6 +81,7 @@ struct intel_pad_context {
 
 struct intel_community_context {
 	u32 *intmask;
+	u32 *hostown;
 };
 
 struct intel_pinctrl_context {
@@ -1284,7 +1285,7 @@ static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl)
 
 	for (i = 0; i < pctrl->ncommunities; i++) {
 		struct intel_community *community = &pctrl->communities[i];
-		u32 *intmask;
+		u32 *intmask, *hostown;
 
 		intmask = devm_kcalloc(pctrl->dev, community->ngpps,
 				       sizeof(*intmask), GFP_KERNEL);
@@ -1292,6 +1293,13 @@ static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl)
 			return -ENOMEM;
 
 		communities[i].intmask = intmask;
+
+		hostown = devm_kcalloc(pctrl->dev, community->ngpps,
+				       sizeof(*hostown), GFP_KERNEL);
+		if (!hostown)
+			return -ENOMEM;
+
+		communities[i].hostown = hostown;
 	}
 
 	pctrl->context.pads = pads;
@@ -1466,7 +1474,7 @@ static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned int
 	return false;
 }
 
-int intel_pinctrl_suspend(struct device *dev)
+int intel_pinctrl_suspend_noirq(struct device *dev)
 {
 	struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
 	struct intel_community_context *communities;
@@ -1501,11 +1509,15 @@ int intel_pinctrl_suspend(struct device *dev)
 		base = community->regs + community->ie_offset;
 		for (gpp = 0; gpp < community->ngpps; gpp++)
 			communities[i].intmask[gpp] = readl(base + gpp * 4);
+
+		base = community->regs + community->hostown_offset;
+		for (gpp = 0; gpp < community->ngpps; gpp++)
+			communities[i].hostown[gpp] = readl(base + gpp * 4);
 	}
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(intel_pinctrl_suspend);
+EXPORT_SYMBOL_GPL(intel_pinctrl_suspend_noirq);
 
 static void intel_gpio_irq_init(struct intel_pinctrl *pctrl)
 {
@@ -1527,7 +1539,32 @@ static void intel_gpio_irq_init(struct intel_pinctrl *pctrl)
 	}
 }
 
-int intel_pinctrl_resume(struct device *dev)
+static u32
+intel_gpio_is_requested(struct gpio_chip *chip, int base, unsigned int size)
+{
+	u32 requested = 0;
+	unsigned int i;
+
+	for (i = 0; i < size; i++)
+		if (gpiochip_is_requested(chip, base + i))
+			requested |= BIT(i);
+
+	return requested;
+}
+
+static u32
+intel_gpio_update_pad_mode(void __iomem *hostown, u32 mask, u32 value)
+{
+	u32 curr, updated;
+
+	curr = readl(hostown);
+	updated = (curr & ~mask) | (value & mask);
+	writel(updated, hostown);
+
+	return curr;
+}
+
+int intel_pinctrl_resume_noirq(struct device *dev)
 {
 	struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
 	const struct intel_community_context *communities;
@@ -1585,11 +1622,30 @@ int intel_pinctrl_resume(struct device *dev)
 			dev_dbg(dev, "restored mask %d/%u %#08x\n", i, gpp,
 				readl(base + gpp * 4));
 		}
+
+		base = community->regs + community->hostown_offset;
+		for (gpp = 0; gpp < community->ngpps; gpp++) {
+			const struct intel_padgroup *padgrp = &community->gpps[gpp];
+			u32 requested = 0, value = 0;
+			u32 saved = communities[i].hostown[gpp];
+
+			if (padgrp->gpio_base < 0)
+				continue;
+
+			requested = intel_gpio_is_requested(&pctrl->chip,
+					padgrp->gpio_base, padgrp->size);
+			value = intel_gpio_update_pad_mode(base + gpp * 4,
+					requested, saved);
+			if ((value ^ saved) & requested) {
+				dev_warn(dev, "restore hostown %d/%u %#8x->%#8x\n",
+					i, gpp, value, saved);
+			}
+		}
 	}
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(intel_pinctrl_resume);
+EXPORT_SYMBOL_GPL(intel_pinctrl_resume_noirq);
 #endif
 
 MODULE_AUTHOR("Mathias Nyman <mathias.nyman@linux.intel.com>");