linux-kernel - [PATCH] pinctrl: microchip-sgpio: Fix support for regmap

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Date:   Tue, 25 Jan 2022 17:12:45 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <lars.povlsen@...rochip.com>, <Steen.Hegelund@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>, <linus.walleij@...aro.org>,
        <colin.foster@...advantage.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH] pinctrl: microchip-sgpio: Fix support for regmap

Initially the driver accessed the registers using u32 __iomem but then
in the blamed commit it changed it to use regmap. The problem is that now
the offset of the registers is not calculated anymore at word offset but
at byte offset. Therefore make sure to multiply the offset with word size.

Fixes: 2afbbab45c261a ("pinctrl: microchip-sgpio: update to support regmap")
Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 drivers/pinctrl/pinctrl-microchip-sgpio.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-microchip-sgpio.c b/drivers/pinctrl/pinctrl-microchip-sgpio.c
index 8e081c90bdb2..2999c98bbdee 100644
--- a/drivers/pinctrl/pinctrl-microchip-sgpio.c
+++ b/drivers/pinctrl/pinctrl-microchip-sgpio.c
@@ -98,6 +98,12 @@ static const struct sgpio_properties properties_sparx5 = {
 	.regoff = { 0x00, 0x06, 0x26, 0x04, 0x05, 0x2a, 0x32, 0x3a, 0x3e, 0x42 },
 };
 
+static const struct regmap_config regmap_config = {
+		.reg_bits = 32,
+		.val_bits = 32,
+		.reg_stride = 4,
+};
+
 static const char * const functions[] = { "gpio" };
 
 struct sgpio_bank {
@@ -137,7 +143,7 @@ static inline int sgpio_addr_to_pin(struct sgpio_priv *priv, int port, int bit)
 
 static inline u32 sgpio_get_addr(struct sgpio_priv *priv, u32 rno, u32 off)
 {
-	return priv->properties->regoff[rno] + off;
+	return (priv->properties->regoff[rno] + off) * regmap_config.reg_stride;
 }
 
 static u32 sgpio_readl(struct sgpio_priv *priv, u32 rno, u32 off)
@@ -821,11 +827,6 @@ static int microchip_sgpio_probe(struct platform_device *pdev)
 	struct clk *clk;
 	u32 __iomem *regs;
 	u32 val;
-	struct regmap_config regmap_config = {
-		.reg_bits = 32,
-		.val_bits = 32,
-		.reg_stride = 4,
-	};
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
-- 
2.33.0