linux-kernel - [PATCH 03/17] pinctrl: amd: Constify pointers to 'pinctrl

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Message-Id: <20250528-pinctrl-const-desc-v1-3-76fe97899945@linaro.org>
Date: Wed, 28 May 2025 12:40:59 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Basavaraj Natikar <Basavaraj.Natikar@....com>, 
 Shyam Sundar S K <Shyam-sundar.S-k@....com>, 
 Andrew Jeffery <andrew@...econstruct.com.au>, Joel Stanley <joel@....id.au>, 
 Avi Fishman <avifishman70@...il.com>, Tomer Maimon <tmaimon77@...il.com>, 
 Tali Perry <tali.perry1@...il.com>, Patrick Venture <venture@...gle.com>, 
 Nancy Yuen <yuenn@...gle.com>, Benjamin Fair <benjaminfair@...gle.com>, 
 Jonathan Neuschäfer <j.neuschaefer@....net>, 
 Rafał Miłecki <rafal@...ecki.pl>, 
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, 
 Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, 
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 Richard Fitzgerald <rf@...nsource.cirrus.com>, 
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 Lorenzo Bianconi <lorenzo@...nel.org>, Sean Wang <sean.wang@...nel.org>, 
 Jesper Nilsson <jesper.nilsson@...s.com>, 
 Lars Persson <lars.persson@...s.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Damien Le Moal <dlemoal@...nel.org>, Vladimir Zapolskiy <vz@...ia.com>, 
 Michal Simek <michal.simek@....com>, Emil Renner Berthing <kernel@...il.dk>, 
 Jianlong Huang <jianlong.huang@...rfivetech.com>, 
 Hal Feng <hal.feng@...rfivetech.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-aspeed@...ts.ozlabs.org, openbmc@...ts.ozlabs.org, 
 linux-arm-kernel@...ts.infradead.org, linux-renesas-soc@...r.kernel.org, 
 linux-sound@...r.kernel.org, patches@...nsource.cirrus.com, 
 linux-mediatek@...ts.infradead.org, linux-arm-kernel@...s.com, 
 linux-riscv@...ts.infradead.org, linux-rtc@...r.kernel.org, 
 linux-stm32@...md-mailman.stormreply.com, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 03/17] pinctrl: amd: Constify pointers to 'pinctrl_desc'

Internal functions obtaining pointers to 'struct pinctrl_desc' do not
modify the contents so they can be made pointers to const.  This makes
code safer, explicit and later allows constifying 'pinctrl_desc' in
pinctrl core code.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/pinctrl/pinctrl-amd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index 5cf3db6d78b79af9ac5e7226de239a0d2f9aaacc..85617cfed2299e131c110e9d4084370790106404 100644
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -872,7 +872,7 @@ static const struct pinconf_ops amd_pinconf_ops = {
 
 static void amd_gpio_irq_init(struct amd_gpio *gpio_dev)
 {
-	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
+	const struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
 	unsigned long flags;
 	u32 pin_reg, mask;
 	int i;
@@ -901,7 +901,7 @@ static void amd_gpio_irq_init(struct amd_gpio *gpio_dev)
 static void amd_gpio_check_pending(void)
 {
 	struct amd_gpio *gpio_dev = pinctrl_dev;
-	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
+	const struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
 	int i;
 
 	if (!pm_debug_messages_on)
@@ -957,7 +957,7 @@ static bool amd_gpio_should_save(struct amd_gpio *gpio_dev, unsigned int pin)
 static int amd_gpio_suspend_hibernate_common(struct device *dev, bool is_suspend)
 {
 	struct amd_gpio *gpio_dev = dev_get_drvdata(dev);
-	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
+	const struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
 	unsigned long flags;
 	int i;
 	u32 wake_mask = is_suspend ? WAKE_SOURCE_SUSPEND : WAKE_SOURCE_HIBERNATE;
@@ -1001,7 +1001,7 @@ static int amd_gpio_hibernate(struct device *dev)
 static int amd_gpio_resume(struct device *dev)
 {
 	struct amd_gpio *gpio_dev = dev_get_drvdata(dev);
-	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
+	const struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
 	unsigned long flags;
 	int i;
 

-- 
2.45.2