linux-kernel - [PATCH RFC v3 5/6] ARM: pxa: Convert Spitz hsync to GPIO descriptors

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Date:   Fri, 29 Sep 2023 15:14:03 +0200
From:   Duje Mihanović <duje.mihanovic@...le.hr>
To:     Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Russell King <linux@...linux.org.uk>,
        Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-gpio@...r.kernel.org,
        Duje Mihanović <duje.mihanovic@...le.hr>
Subject: [PATCH RFC v3 5/6] ARM: pxa: Convert Spitz hsync to GPIO
 descriptors

Sharp's Spitz still uses the legacy GPIO interface in its
wait_for_hsync() function.

Convert it to use the GPIO descriptor interface.

Signed-off-by: Duje Mihanović <duje.mihanovic@...le.hr>
---
 arch/arm/mach-pxa/spitz.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index c789eeaf3c2c..25878daec986 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -520,12 +520,14 @@ static inline void spitz_leds_init(void) {}
  * SSP Devices
  ******************************************************************************/
 #if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
+static struct gpio_desc *hsync;
+
 static void spitz_ads7846_wait_for_hsync(void)
 {
-	while (gpio_get_value(SPITZ_GPIO_HSYNC))
+	while (gpiod_get_value(hsync))
 		cpu_relax();
 
-	while (!gpio_get_value(SPITZ_GPIO_HSYNC))
+	while (!gpiod_get_value(hsync))
 		cpu_relax();
 }
 
@@ -543,6 +545,8 @@ static struct gpiod_lookup_table spitz_ads7846_gpio_table = {
 	.table = {
 		GPIO_LOOKUP("gpio-pxa", SPITZ_GPIO_TP_INT,
 			    "pendown", GPIO_ACTIVE_LOW),
+		GPIO_LOOKUP("gpio-pxa", SPITZ_GPIO_HSYNC,
+			    "hsync", GPIO_ACTIVE_LOW),
 		{ }
 	},
 };
@@ -622,8 +626,13 @@ static void __init spitz_spi_init(void)
 
 	gpiod_add_lookup_table(&spitz_ads7846_gpio_table);
 	gpiod_add_lookup_table(&spitz_spi_gpio_table);
+	hsync = gpiod_get(NULL, "hsync", GPIOD_IN);
 	pxa2xx_set_spi_info(2, &spitz_spi_info);
-	spi_register_board_info(ARRAY_AND_SIZE(spitz_spi_devices));
+	if (IS_ERR(hsync)) {
+		pr_err("Failed to get hsync GPIO: %ld\n", PTR_ERR(hsync));
+		spi_register_board_info(ARRAY_AND_SIZE(&spitz_spi_devices[1]));
+	} else
+		spi_register_board_info(ARRAY_AND_SIZE(spitz_spi_devices));
 }
 #else
 static inline void spitz_spi_init(void) {}

-- 
2.42.0