linux-kernel - [PATCH] sh: ecovec24: use static device properties to describe the touchscreen

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Message-ID: <ZsVKmnjxdnKBLvju@google.com>
Date: Tue, 20 Aug 2024 19:02:02 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Rich Felker <dalias@...c.org>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Cc: linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org
Subject: [PATCH] sh: ecovec24: use static device properties to describe the
 touchscreen

Convert the board to use static device properties instead of platform
data to describe the touchscreen, so that support for platform data can
be removed from tsc2007 driver (ecovec24 is the last board using this
mechanism of describing tsc2007).

Device properties do not allow custom board methods, so the method for
getting "pen down" state was removed (the driver is capable of working
without it). If this functionality is needed proper pin control/gpio
support needs to be implemented so that the same pin can serve as an
input GPIO and an interrupt.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 arch/sh/boards/mach-ecovec24/setup.c | 38 ++++++++--------------------
 1 file changed, 11 insertions(+), 27 deletions(-)

diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index 6f13557eecd6..4833bec0c3c5 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -26,6 +26,7 @@
 #include <linux/platform_data/tmio.h>
 #include <linux/platform_data/tsc2007.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/regulator/fixed.h>
 #include <linux/regulator/machine.h>
 #include <linux/sh_eth.h>
@@ -589,39 +590,21 @@ static struct platform_device keysc_device = {
 /* TouchScreen */
 #define IRQ0 evt2irq(0x600)
 
-static int ts_get_pendown_state(struct device *dev)
-{
-	int val = 0;
-	gpio_free(GPIO_FN_INTC_IRQ0);
-	gpio_request(GPIO_PTZ0, NULL);
-	gpio_direction_input(GPIO_PTZ0);
-
-	val = gpio_get_value(GPIO_PTZ0);
-
-	gpio_free(GPIO_PTZ0);
-	gpio_request(GPIO_FN_INTC_IRQ0, NULL);
-
-	return val ? 0 : 1;
-}
-
-static int ts_init(void)
-{
-	gpio_request(GPIO_FN_INTC_IRQ0, NULL);
-	return 0;
-}
+static const struct property_entry tsc2007_properties[] = {
+	PROPERTY_ENTRY_U32("ti,x-plate-ohms", 180),
+	{ }
+};
 
-static struct tsc2007_platform_data tsc2007_info = {
-	.model			= 2007,
-	.x_plate_ohms		= 180,
-	.get_pendown_state	= ts_get_pendown_state,
-	.init_platform_hw	= ts_init,
+static const struct software_node tsc2007_swnode = {
+	.name = "tsc2007",
+	.properties = tsc2007_properties,
 };
 
 static struct i2c_board_info ts_i2c_clients = {
 	I2C_BOARD_INFO("tsc2007", 0x48),
 	.type		= "tsc2007",
-	.platform_data	= &tsc2007_info,
 	.irq		= IRQ0,
+	.swnode		= &tsc2007_swnode,
 };
 
 static struct regulator_consumer_supply cn12_power_consumers[] =
@@ -1241,8 +1224,9 @@ static int __init arch_setup(void)
 		gpio_direction_output(GPIO_PTF4, 1);
 
 		/* enable TouchScreen */
-		i2c_register_board_info(0, &ts_i2c_clients, 1);
+		gpio_request(GPIO_FN_INTC_IRQ0, NULL);
 		irq_set_irq_type(IRQ0, IRQ_TYPE_LEVEL_LOW);
+		i2c_register_board_info(0, &ts_i2c_clients, 1);
 	}
 
 	/* enable CEU0 */
-- 
2.46.0.184.g6999bdac58-goog


-- 
Dmitry