[26/46] ARM: pxa: zylonite: use gpio lookup instead mfp header
diff mbox series

Message ID 20191018154201.1276638-26-arnd@arndb.de
State New
Headers show
Series
  • ARM: pxa: towards multiplatform support
Related show

Commit Message

Arnd Bergmann Oct. 18, 2019, 3:41 p.m. UTC
The mach/mfp.h header is only used by this one driver
for hardcoded gpio numbers. Change that to use a lookup
table instead.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-pxa/zylonite.c                | 31 +++++++++++++++++++++
 drivers/input/touchscreen/zylonite-wm97xx.c | 20 +++++++------
 2 files changed, 42 insertions(+), 9 deletions(-)

Comments

Robert Jarzmik Oct. 28, 2019, 9:31 p.m. UTC | #1
Arnd Bergmann <arnd@arndb.de> writes:

> The mach/mfp.h header is only used by this one driver
> for hardcoded gpio numbers. Change that to use a lookup
> table instead.
>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: linux-input@vger.kernel.org
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>

Cheers.

--
Robert
Linus Walleij Nov. 5, 2019, 9:28 a.m. UTC | #2
On Fri, Oct 18, 2019 at 5:42 PM Arnd Bergmann <arnd@arndb.de> wrote:

> The mach/mfp.h header is only used by this one driver
> for hardcoded gpio numbers. Change that to use a lookup
> table instead.
>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: linux-input@vger.kernel.org
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
(...)
> +               GPIO_LOOKUP("gpio-pxa", mfp_to_gpio(MFP_PIN_GPIO15),
> +                           "touch", GPIO_ACTIVE_LOW),

What I tried to do with code like this, when I was ambitious,
was to wind out mfp_to_gpio() as well and either just encode
the offset on gpio-pxa as a define locally.

But this works too, the kernel looks better after than before
and I am not perfectionist, so:
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Patch
diff mbox series

diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index e3ae45f444d5..d6c0e8866e18 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -32,6 +32,7 @@ 
 #include <linux/platform_data/usb-ohci-pxa27x.h>
 #include <linux/platform_data/keypad-pxa27x.h>
 #include <linux/platform_data/mtd-nand-pxa3xx.h>
+#include <mach/mfp.h>
 
 #include "devices.h"
 #include "generic.h"
@@ -426,6 +427,35 @@  static void __init zylonite_init_ohci(void)
 static inline void zylonite_init_ohci(void) {}
 #endif /* CONFIG_USB_OHCI_HCD || CONFIG_USB_OHCI_HCD_MODULE */
 
+static struct gpiod_lookup_table zylonite_wm97xx_touch_gpio15_table = {
+	.dev_id = "wm97xx-touch.0",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", mfp_to_gpio(MFP_PIN_GPIO15),
+			    "touch", GPIO_ACTIVE_LOW),
+		{ },
+	},
+};
+
+static struct gpiod_lookup_table zylonite_wm97xx_touch_gpio26_table = {
+	.dev_id = "wm97xx-touch.0",
+	.table = {
+		GPIO_LOOKUP("gpio-pxa", mfp_to_gpio(MFP_PIN_GPIO26),
+			    "touch", GPIO_ACTIVE_LOW),
+		{ },
+	},
+};
+
+static void __init zylonite_init_wm97xx_touch(void)
+{
+	if (!IS_ENABLED(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE))
+		return;
+
+	if (cpu_is_pxa320())
+		gpiod_add_lookup_table(&zylonite_wm97xx_touch_gpio15_table);
+	else
+		gpiod_add_lookup_table(&zylonite_wm97xx_touch_gpio26_table);
+}
+
 static void __init zylonite_init(void)
 {
 	pxa_set_ffuart_info(NULL);
@@ -451,6 +481,7 @@  static void __init zylonite_init(void)
 	zylonite_init_nand();
 	zylonite_init_leds();
 	zylonite_init_ohci();
+	zylonite_init_wm97xx_touch();
 }
 
 MACHINE_START(ZYLONITE, "PXA3xx Platform Development Kit (aka Zylonite)")
diff --git a/drivers/input/touchscreen/zylonite-wm97xx.c b/drivers/input/touchscreen/zylonite-wm97xx.c
index f57bdf083188..cabdd6e3c6f8 100644
--- a/drivers/input/touchscreen/zylonite-wm97xx.c
+++ b/drivers/input/touchscreen/zylonite-wm97xx.c
@@ -17,14 +17,13 @@ 
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/soc/pxa/cpu.h>
 #include <linux/wm97xx.h>
 
-#include <mach/mfp.h>
 #include <mach/regs-ac97.h>
 
 struct continuous {
@@ -181,14 +180,17 @@  static struct wm97xx_mach_ops zylonite_mach_ops = {
 static int zylonite_wm97xx_probe(struct platform_device *pdev)
 {
 	struct wm97xx *wm = platform_get_drvdata(pdev);
-	int gpio_touch_irq;
-
-	if (cpu_is_pxa320())
-		gpio_touch_irq = mfp_to_gpio(MFP_PIN_GPIO15);
-	else
-		gpio_touch_irq = mfp_to_gpio(MFP_PIN_GPIO26);
+	struct gpio_desc *gpio_touch_irq;
+	int err;
+
+	gpio_touch_irq = devm_gpiod_get(&pdev->dev, "touch", GPIOD_IN);
+	err = PTR_ERR_OR_ZERO(gpio_touch_irq);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot get irq gpio: %d\n", err);
+		return err;
+	}
 
-	wm->pen_irq = gpio_to_irq(gpio_touch_irq);
+	wm->pen_irq = gpiod_to_irq(gpio_touch_irq);
 	irq_set_irq_type(wm->pen_irq, IRQ_TYPE_EDGE_BOTH);
 
 	wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,