linux-kernel - [PATCH 2/2] pinctrl: spacemit: add clock support for K1 SoC

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Message-Id: <20250412-02-k1-pinctrl-clk-v1-2-e39734419a2d@gentoo.org>
Date: Sat, 12 Apr 2025 14:58:11 +0800
From: Yixun Lan <dlan@...too.org>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, Yixun Lan <dlan@...too.org>
Subject: [PATCH 2/2] pinctrl: spacemit: add clock support for K1 SoC

For SpacemiT K1 SoC's pinctrl, explicitly acquiring clocks in
the driver instead of relying on bootloader or default hardware
settings to enable it.

Signed-off-by: Yixun Lan <dlan@...too.org>
---
 drivers/pinctrl/spacemit/pinctrl-k1.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/pinctrl/spacemit/pinctrl-k1.c b/drivers/pinctrl/spacemit/pinctrl-k1.c
index 67e867b04a02ea1887d93aedfdea5bda037f88b1..3805fb09c1bc3b8cf2ccfc22dd25367292b397b9 100644
--- a/drivers/pinctrl/spacemit/pinctrl-k1.c
+++ b/drivers/pinctrl/spacemit/pinctrl-k1.c
@@ -2,6 +2,7 @@
 /* Copyright (c) 2024 Yixun Lan <dlan@...too.org> */
 
 #include <linux/bits.h>
+#include <linux/clk.h>
 #include <linux/cleanup.h>
 #include <linux/io.h>
 #include <linux/of.h>
@@ -721,6 +722,7 @@ static int spacemit_pinctrl_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct spacemit_pinctrl *pctrl;
+	struct clk *func_clk, *bus_clk;
 	const struct spacemit_pinctrl_data *pctrl_data;
 	int ret;
 
@@ -739,6 +741,14 @@ static int spacemit_pinctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(pctrl->regs))
 		return PTR_ERR(pctrl->regs);
 
+	func_clk = devm_clk_get_optional_enabled(dev, "func");
+	if (IS_ERR(func_clk))
+		return dev_err_probe(dev, PTR_ERR(func_clk), "failed to get func clock\n");
+
+	bus_clk = devm_clk_get_optional_enabled(dev, "bus");
+	if (IS_ERR(bus_clk))
+		return dev_err_probe(dev, PTR_ERR(bus_clk), "failed to get bus clock\n");
+
 	pctrl->pdesc.name = dev_name(dev);
 	pctrl->pdesc.pins = pctrl_data->pins;
 	pctrl->pdesc.npins = pctrl_data->npins;

-- 
2.49.0