linux-kernel - [PATCH 1/6] gpio: stmpe: don't print out global GPIO numbers in debugfs callbacks

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Message-Id: <20250826-gpio-dbg-show-base-v1-1-7f27cd7f2256@linaro.org>
Date: Tue, 26 Aug 2025 11:54:35 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Uwe Kleine-König <ukleinek@...nel.org>
Cc: linux-gpio@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 patches@...nsource.cirrus.com, linux-pwm@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 1/6] gpio: stmpe: don't print out global GPIO numbers in
 debugfs callbacks

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

In order to further limit the number of references to the GPIO base
number stored in struct gpio_chip, replace the global GPIO numbers in
the output of debugfs callbacks by hardware offsets.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpio-stmpe.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index 7bf270af07fe49e7a778e91134b5bc5e7d0a13a5..6faf30347a36396fe9ab14ab4efb7331f78e95e3 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -262,9 +262,8 @@ static void stmpe_gpio_irq_unmask(struct irq_data *d)
 	stmpe_gpio->regs[REG_IE][regoffset] |= mask;
 }
 
-static void stmpe_dbg_show_one(struct seq_file *s,
-			       struct gpio_chip *gc,
-			       unsigned offset, unsigned gpio)
+static void stmpe_dbg_show_one(struct seq_file *s, struct gpio_chip *gc,
+			       unsigned int offset)
 {
 	struct stmpe_gpio *stmpe_gpio = gpiochip_get_data(gc);
 	struct stmpe *stmpe = stmpe_gpio->stmpe;
@@ -286,7 +285,7 @@ static void stmpe_dbg_show_one(struct seq_file *s,
 
 	if (dir) {
 		seq_printf(s, " gpio-%-3d (%-20.20s) out %s",
-			   gpio, label ?: "(none)", str_hi_lo(val));
+			   offset, label ?: "(none)", str_hi_lo(val));
 	} else {
 		u8 edge_det_reg;
 		u8 rise_reg;
@@ -354,7 +353,7 @@ static void stmpe_dbg_show_one(struct seq_file *s,
 		irqen = !!(ret & mask);
 
 		seq_printf(s, " gpio-%-3d (%-20.20s) in  %s %13s %13s %25s %25s",
-			   gpio, label ?: "(none)",
+			   offset, label ?: "(none)",
 			   str_hi_lo(val),
 			   edge_det_values[edge_det],
 			   irqen ? "IRQ-enabled" : "IRQ-disabled",
@@ -366,10 +365,9 @@ static void stmpe_dbg_show_one(struct seq_file *s,
 static void stmpe_dbg_show(struct seq_file *s, struct gpio_chip *gc)
 {
 	unsigned i;
-	unsigned gpio = gc->base;
 
-	for (i = 0; i < gc->ngpio; i++, gpio++) {
-		stmpe_dbg_show_one(s, gc, i, gpio);
+	for (i = 0; i < gc->ngpio; i++) {
+		stmpe_dbg_show_one(s, gc, i);
 		seq_putc(s, '\n');
 	}
 }

-- 
2.48.1