release/5.2.49/pinctrl-ocelot-Fix-GPIO-interrupt-decoding-on-Jaguar.patch

From 1bf0f89f4ad0e00eac5068dbb03ca0ff9611dfef Mon Sep 17 00:00:00 2001
From: Lars Povlsen <lars.povlsen@microchip.com>
Date: Wed, 13 May 2020 14:55:21 +0200
Subject: [PATCH] pinctrl: ocelot: Fix GPIO interrupt decoding on Jaguar2

commit 0b47afc65453a70bc521e251138418056f65793f upstream.

This fixes a problem with using the GPIO as an interrupt on Jaguar2
(and similar), as the register layout of the platforms with 64 GPIO's
are pairwise, such that the original offset must be multiplied with
the platform stride.

Fixes: da801ab56ad8 pinctrl: ocelot: add MSCC Jaguar2 support.
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
Link: https://lore.kernel.org/r/20200513125532.24585-4-lars.povlsen@microchip.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/pinctrl/pinctrl-ocelot.c b/drivers/pinctrl/pinctrl-ocelot.c
index fb76fb2e9ea5..0a951a75c82b 100644
--- a/drivers/pinctrl/pinctrl-ocelot.c
+++ b/drivers/pinctrl/pinctrl-ocelot.c
@@ -711,11 +711,12 @@ static void ocelot_irq_handler(struct irq_desc *desc)
 	struct irq_chip *parent_chip = irq_desc_get_chip(desc);
 	struct gpio_chip *chip = irq_desc_get_handler_data(desc);
 	struct ocelot_pinctrl *info = gpiochip_get_data(chip);
+	unsigned int id_reg = OCELOT_GPIO_INTR_IDENT * info->stride;
 	unsigned int reg = 0, irq, i;
 	unsigned long irqs;
 
 	for (i = 0; i < info->stride; i++) {
-		regmap_read(info->map, OCELOT_GPIO_INTR_IDENT + 4 * i, &reg);
+		regmap_read(info->map, id_reg + 4 * i, &reg);
 		if (!reg)
 			continue;
 
-- 
2.27.0