From 0b90315af7602aeb40fe7b6255ab212a19dbd78e Mon Sep 17 00:00:00 2001
From: Horatiu Vultur <horatiu.vultur@microchip.com>
Date: Mon, 18 Oct 2021 10:57:54 +0200
Subject: [PATCH] pinctrl: microchip sgpio: use reset driver
Git-commit: 0b90315af7602aeb40fe7b6255ab212a19dbd78e
Patch-mainline: v5.16-rc1
References: git-fixes
On lan966x platform when the switch gets reseted then also the sgpio
gets reseted. The fix for this is to extend also the sgpio driver to
call the reset driver which will be reseted only once by the first
driver that is probed.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Steen Hegelund <steen.hegelund@microchip.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20211018085754.1066056-3-horatiu.vultur@microchip.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/pinctrl/pinctrl-microchip-sgpio.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-microchip-sgpio.c b/drivers/pinctrl/pinctrl-microchip-sgpio.c
index 072bccdea2a5..78765faa245a 100644
--- a/drivers/pinctrl/pinctrl-microchip-sgpio.c
+++ b/drivers/pinctrl/pinctrl-microchip-sgpio.c
@@ -17,6 +17,7 @@
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/property.h>
+#include <linux/reset.h>
#include "core.h"
#include "pinconf.h"
@@ -803,6 +804,7 @@ static int microchip_sgpio_probe(struct platform_device *pdev)
int div_clock = 0, ret, port, i, nbanks;
struct device *dev = &pdev->dev;
struct fwnode_handle *fwnode;
+ struct reset_control *reset;
struct sgpio_priv *priv;
struct clk *clk;
u32 val;
@@ -813,6 +815,11 @@ static int microchip_sgpio_probe(struct platform_device *pdev)
priv->dev = dev;
+ reset = devm_reset_control_get_optional_shared(&pdev->dev, "switch");
+ if (IS_ERR(reset))
+ return dev_err_probe(dev, PTR_ERR(reset), "Failed to get reset\n");
+ reset_control_reset(reset);
+
clk = devm_clk_get(dev, NULL);
if (IS_ERR(clk))
return dev_err_probe(dev, PTR_ERR(clk), "Failed to get clock\n");
--
2.31.1