linux-kernel - [PATCH] pinctrl: realtek: Select REGMAP

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Message-ID: <20251023075530.14739-1-eleanor.lin@realtek.com>
Date: Thu, 23 Oct 2025 15:55:29 +0800
From: Yu-Chun Lin <eleanor.lin@...ltek.com>
To: <linus.walleij@...aro.org>, <tychang@...ltek.com>
CC: <linux-gpio@...r.kernel.org.org>, <linux-kernel@...r.kernel.org>,
        <cy.huang@...ltek.com>, <stanley_chang@...ltek.com>,
        <eleanor.lin@...ltek.com>, <james.tai@...ltek.com>
Subject: [PATCH] pinctrl: realtek: Select REGMAP_MMIO for RTD driver

The pinctrl-rtd driver uses 'devm_regmap_init_mmio', which requires
'REGMAP_MMIO' to be enabled.

Without this selection, the build fails with an undefined reference:
aarch64-none-linux-gnu-ld: drivers/pinctrl/realtek/pinctrl-rtd.o: in
function rtd_pinctrl_probe': pinctrl-rtd.c:(.text+0x5a0): undefined
reference to __devm_regmap_init_mmio_clk'

Fix this by selecting 'REGMAP_MMIO' in the Kconfig.

Fixes: e99ce78030db ("pinctrl: realtek: Add common pinctrl driver for Realtek DHC RTD SoCs")
Signed-off-by: Yu-Chun Lin <eleanor.lin@...ltek.com>
---
 drivers/pinctrl/realtek/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/realtek/Kconfig b/drivers/pinctrl/realtek/Kconfig
index 0fc6bd4fcb7e..400c9e5b16ad 100644
--- a/drivers/pinctrl/realtek/Kconfig
+++ b/drivers/pinctrl/realtek/Kconfig
@@ -6,6 +6,7 @@ config PINCTRL_RTD
 	default y
 	select PINMUX
 	select GENERIC_PINCONF
+	select REGMAP_MMIO
 
 config PINCTRL_RTD1619B
 	tristate "Realtek DHC 1619B pin controller driver"
-- 
2.34.1