linux-kernel - [PATCH v2 3/5] iio: adc: exynos_adc: Drop platform data support

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Message-Id: <20250830-s3c-cleanup-adc-v2-3-4f8299343d32@linaro.org>
Date: Sat, 30 Aug 2025 18:48:32 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v2 3/5] iio: adc: exynos_adc: Drop platform data support

There are no Samsung Exynos SoC ADC driver users which bind via platform
ID, thus platform data is never set and can be dropped.

Reviewed-by: Andy Shevchenko <andy@...nel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---

Changes in v2:
1. Drop touchscreen-s3c2410.h
---
 drivers/iio/adc/exynos_adc.c                      | 11 +----------
 include/linux/platform_data/touchscreen-s3c2410.h | 22 ----------------------
 2 files changed, 1 insertion(+), 32 deletions(-)

diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 30f6d8436e775a8d2177951b436cd45152307ea2..d21a9f3621d96c8051f2062aa6a069e8c29faf9b 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -29,8 +29,6 @@
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 
-#include <linux/platform_data/touchscreen-s3c2410.h>
-
 /* S3C/EXYNOS4412/5250 ADC_V1 registers definitions */
 #define ADC_V1_CON(x)		((x) + 0x00)
 #define ADC_V1_DLY(x)		((x) + 0x08)
@@ -106,7 +104,6 @@ struct exynos_adc {
 	struct clk		*clk;
 	struct clk		*sclk;
 	unsigned int		irq;
-	unsigned int		delay;
 	struct regulator	*vdd;
 
 	struct completion	completion;
@@ -213,7 +210,7 @@ static void exynos_adc_v1_init_hw(struct exynos_adc *info)
 	writel(con1, ADC_V1_CON(info->regs));
 
 	/* set touchscreen delay */
-	writel(info->delay, ADC_V1_DLY(info->regs));
+	writel(10000, ADC_V1_DLY(info->regs));
 }
 
 static void exynos_adc_v1_exit_hw(struct exynos_adc *info)
@@ -556,7 +553,6 @@ static int exynos_adc_probe(struct platform_device *pdev)
 {
 	struct exynos_adc *info = NULL;
 	struct device_node *np = pdev->dev.of_node;
-	struct s3c2410_ts_mach_info *pdata = dev_get_platdata(&pdev->dev);
 	struct iio_dev *indio_dev = NULL;
 	int ret;
 	int irq;
@@ -657,11 +653,6 @@ static int exynos_adc_probe(struct platform_device *pdev)
 	if (info->data->init_hw)
 		info->data->init_hw(info);
 
-	if (pdata)
-		info->delay = pdata->delay;
-	else
-		info->delay = 10000;
-
 	ret = of_platform_populate(np, exynos_adc_match, NULL, &indio_dev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed adding child nodes\n");
diff --git a/include/linux/platform_data/touchscreen-s3c2410.h b/include/linux/platform_data/touchscreen-s3c2410.h
deleted file mode 100644
index bf8d3b9d7c6a98fc2392786df2c0cdf128047645..0000000000000000000000000000000000000000
--- a/include/linux/platform_data/touchscreen-s3c2410.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2005 Arnaud Patard <arnaud.patard@...-net.org>
-*/
-
-#ifndef __TOUCHSCREEN_S3C2410_H
-#define __TOUCHSCREEN_S3C2410_H
-
-struct s3c2410_ts_mach_info {
-	int delay;
-	int presc;
-	int oversampling_shift;
-	void (*cfg_gpio)(struct platform_device *dev);
-};
-
-extern void s3c24xx_ts_set_platdata(struct s3c2410_ts_mach_info *);
-extern void s3c64xx_ts_set_platdata(struct s3c2410_ts_mach_info *);
-
-/* defined by architecture to configure gpio */
-extern void s3c24xx_ts_cfg_gpio(struct platform_device *dev);
-
-#endif /*__TOUCHSCREEN_S3C2410_H */

-- 
2.48.1