linux-kernel - [PATCH RFT v6 3/6] ARM: pxa: Convert Spitz CF power control to GPIO descriptors

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Message-Id: <20231006-pxa-gpio-v6-3-981b4910d599@skole.hr>
Date:   Fri, 06 Oct 2023 15:44:27 +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>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-input@...r.kernel.org, linux-spi@...r.kernel.org,
        Duje Mihanović <duje.mihanovic@...le.hr>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH RFT v6 3/6] ARM: pxa: Convert Spitz CF power control to
 GPIO descriptors

Sharp's Spitz board still uses the legacy GPIO interface for controlling
the power supply to its CF and SD card slots.

Convert it to use the GPIO descriptor interface.

Acked-by: Linus Walleij <linus.walleij@...aro.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Signed-off-by: Duje Mihanović <duje.mihanovic@...le.hr>
---
 arch/arm/mach-pxa/spitz.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 1fb4102ea39e..8e9301cd0c93 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -133,6 +133,10 @@ static unsigned long spitz_pin_config[] __initdata = {
  * Scoop GPIO expander
  ******************************************************************************/
 #if defined(CONFIG_SHARP_SCOOP) || defined(CONFIG_SHARP_SCOOP_MODULE)
+GPIO_LOOKUP_SINGLE(spitz_card_pwr_ctrl_gpio_table, "pxa2xx-mci.0",
+		"sharp-scoop", SPITZ_GPIO_CF_POWER, "cf_power",
+		GPIO_ACTIVE_HIGH);
+
 /* SCOOP Device #1 */
 static struct resource spitz_scoop_1_resources[] = {
 	[0] = {
@@ -190,6 +194,7 @@ struct platform_device spitz_scoop_2_device = {
 static void __init spitz_scoop_init(void)
 {
 	platform_device_register(&spitz_scoop_1_device);
+	gpiod_add_lookup_table(&spitz_card_pwr_ctrl_gpio_table);
 
 	/* Akita doesn't have the second SCOOP chip */
 	if (!machine_is_akita())
@@ -201,9 +206,18 @@ static void __maybe_unused spitz_card_pwr_ctrl(uint8_t enable, uint8_t new_cpr)
 {
 	unsigned short cpr;
 	unsigned long flags;
+	struct gpio_desc *cf_power;
+
+	cf_power = gpiod_get(&pxa_device_mci.dev, "cf_power", GPIOD_ASIS);
+	if (IS_ERR(cf_power)) {
+		dev_err(&pxa_device_mci.dev,
+				"failed to get power control GPIO with %ld\n",
+				PTR_ERR(cf_power));
+		return;
+	}
 
 	if (new_cpr & 0x7) {
-		gpio_set_value(SPITZ_GPIO_CF_POWER, 1);
+		gpiod_direction_output(cf_power, 1);
 		mdelay(5);
 	}
 
@@ -222,8 +236,10 @@ static void __maybe_unused spitz_card_pwr_ctrl(uint8_t enable, uint8_t new_cpr)
 
 	if (!(cpr & 0x7)) {
 		mdelay(1);
-		gpio_set_value(SPITZ_GPIO_CF_POWER, 0);
+		gpiod_direction_output(cf_power, 0);
 	}
+
+	gpiod_put(cf_power);
 }
 
 #else

-- 
2.42.0