From 6d416b9bb577cc3013301cfccb0d938567af489d Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 9 Jan 2020 08:53:28 +0100
Subject: [PATCH] pinctrl: intel: Add GPIO <-> pin mapping ranges via callback
Git-commit: 6d416b9bb577cc3013301cfccb0d938567af489d
Patch-mainline: v5.6-rc1
References: jsc#SLE-12730

When IRQ chip is instantiated via GPIO library flow, the few functions,
in particular the ACPI event registration mechanism, on some of ACPI based
platforms expect that the pin ranges are initialized to that point.

Add GPIO <-> pin mapping ranges via callback in the GPIO library flow.

Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/pinctrl/intel/pinctrl-intel.c | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 06be75a636ba..2f4629bbb313 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -1130,8 +1130,8 @@ static irqreturn_t intel_gpio_irq(int irq, void *data)
 	return ret;
 }
 
-static int intel_gpio_add_pin_ranges(struct intel_pinctrl *pctrl,
-				     const struct intel_community *community)
+static int intel_gpio_add_community_ranges(struct intel_pinctrl *pctrl,
+				const struct intel_community *community)
 {
 	int ret = 0, i;
 
@@ -1151,6 +1151,24 @@ static int intel_gpio_add_pin_ranges(struct intel_pinctrl *pctrl,
 	return ret;
 }
 
+static int intel_gpio_add_pin_ranges(struct gpio_chip *gc)
+{
+	struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+	int ret, i;
+
+	for (i = 0; i < pctrl->ncommunities; i++) {
+		struct intel_community *community = &pctrl->communities[i];
+
+		ret = intel_gpio_add_community_ranges(pctrl, community);
+		if (ret) {
+			dev_err(pctrl->dev, "failed to add GPIO pin range\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
 static unsigned int intel_gpio_ngpio(const struct intel_pinctrl *pctrl)
 {
 	const struct intel_community *community;
@@ -1175,7 +1193,7 @@ static unsigned int intel_gpio_ngpio(const struct intel_pinctrl *pctrl)
 
 static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq)
 {
-	int ret, i;
+	int ret;
 
 	pctrl->chip = intel_gpio_chip;
 
@@ -1184,6 +1202,7 @@ static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq)
 	pctrl->chip.label = dev_name(pctrl->dev);
 	pctrl->chip.parent = pctrl->dev;
 	pctrl->chip.base = -1;
+	pctrl->chip.add_pin_ranges = intel_gpio_add_pin_ranges;
 	pctrl->irq = irq;
 
 	/* Setup IRQ chip */
@@ -1201,16 +1220,6 @@ static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq)
 		return ret;
 	}
 
-	for (i = 0; i < pctrl->ncommunities; i++) {
-		struct intel_community *community = &pctrl->communities[i];
-
-		ret = intel_gpio_add_pin_ranges(pctrl, community);
-		if (ret) {
-			dev_err(pctrl->dev, "failed to add GPIO pin range\n");
-			return ret;
-		}
-	}
-
 	/*
 	 * We need to request the interrupt here (instead of providing chip
 	 * to the irq directly) because on some platforms several GPIO
-- 
2.16.4