linux-kernel - [PATCH RFT 4/6] ARM: omap1: ams-delta: use generic device properties for gpio-mmio

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Message-Id: <20250624-gpio-mmio-pdata-v1-4-a58c72eb556a@linaro.org>
Date: Tue, 24 Jun 2025 15:19:15 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Lee Jones <lee@...nel.org>, 
 Liviu Dudau <liviu.dudau@....com>, Sudeep Holla <sudeep.holla@....com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Aaro Koskinen <aaro.koskinen@....fi>, 
 Janusz Krzysztofik <jmkrzyszt@...il.com>, Tony Lindgren <tony@...mide.com>, 
 Russell King <linux@...linux.org.uk>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org, 
 patches@...nsource.cirrus.com, linux-samsung-soc@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH RFT 4/6] ARM: omap1: ams-delta: use generic device
 properties for gpio-mmio

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

The two latch GPIO devices in ams-delta are registered with struct
bgpio_pdata passed as platform_data to the gpio-mmio driver. We want to
remove the bgpio_pdata from the kernel and the gpio-mmio driver is now
also able to get the relevant values from the software node. Set up
device properties and switch to using platform_device_info to register
the devices as platform_add_devices() doesn't allow us to pass device
properties to the driver model.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 arch/arm/mach-omap1/board-ams-delta.c | 42 +++++++++++++++++------------------
 1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 0daf6c5b5c1cbcfd5bd15203cad119d39aa95f19..16392720296cd224732450c85419c35bbab506f6 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -19,6 +19,7 @@
 #include <linux/mtd/nand-gpio.h>
 #include <linux/mtd/partitions.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/regulator/consumer.h>
 #include <linux/regulator/fixed.h>
 #include <linux/regulator/machine.h>
@@ -175,20 +176,18 @@ static struct resource latch1_resources[] = {
 
 #define LATCH1_LABEL	"latch1"
 
-static struct bgpio_pdata latch1_pdata = {
-	.label	= LATCH1_LABEL,
-	.base	= -1,
-	.ngpio	= LATCH1_NGPIO,
+static const struct property_entry latch1_gpio_props[] = {
+	PROPERTY_ENTRY_STRING("label", LATCH1_LABEL),
+	PROPERTY_ENTRY_U32("ngpios", LATCH1_NGPIO),
+	{ }
 };
 
-static struct platform_device latch1_gpio_device = {
+static const struct platform_device_info latch1_gpio_devinfo = {
 	.name		= "basic-mmio-gpio",
 	.id		= 0,
-	.resource	= latch1_resources,
-	.num_resources	= ARRAY_SIZE(latch1_resources),
-	.dev		= {
-		.platform_data	= &latch1_pdata,
-	},
+	.res		= latch1_resources,
+	.num_res	= ARRAY_SIZE(latch1_resources),
+	.properties	= latch1_gpio_props,
 };
 
 #define LATCH1_PIN_LED_CAMERA		0
@@ -213,20 +212,18 @@ static struct resource latch2_resources[] = {
 
 #define LATCH2_LABEL	"latch2"
 
-static struct bgpio_pdata latch2_pdata = {
-	.label	= LATCH2_LABEL,
-	.base	= -1,
-	.ngpio	= LATCH2_NGPIO,
+static const struct property_entry latch2_gpio_props[] = {
+	PROPERTY_ENTRY_STRING("label", LATCH2_LABEL),
+	PROPERTY_ENTRY_U32("ngpios", LATCH2_NGPIO),
+	{ }
 };
 
-static struct platform_device latch2_gpio_device = {
+static struct platform_device_info latch2_gpio_devinfo = {
 	.name		= "basic-mmio-gpio",
 	.id		= 1,
-	.resource	= latch2_resources,
-	.num_resources	= ARRAY_SIZE(latch2_resources),
-	.dev		= {
-		.platform_data	= &latch2_pdata,
-	},
+	.res		= latch2_resources,
+	.num_res	= ARRAY_SIZE(latch2_resources),
+	.properties	= latch2_gpio_props,
 };
 
 #define LATCH2_PIN_LCD_VBLEN		0
@@ -542,8 +539,6 @@ static struct gpiod_lookup_table keybrd_pwr_gpio_table = {
 };
 
 static struct platform_device *ams_delta_devices[] __initdata = {
-	&latch1_gpio_device,
-	&latch2_gpio_device,
 	&ams_delta_kp_device,
 	&ams_delta_audio_device,
 	&ams_delta_serio_device,
@@ -697,6 +692,9 @@ static void __init ams_delta_init(void)
 	omap1_usb_init(&ams_delta_usb_config);
 	platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
 
+	platform_device_register_full(&latch1_gpio_devinfo);
+	platform_device_register_full(&latch2_gpio_devinfo);
+
 	/*
 	 * As soon as regulator consumers have been registered, assign their
 	 * dev_names to consumer supply entries of respective regulators.

-- 
2.48.1