Subject: [PATCH 3/5] ep93xx: Add ADC platform device support to core

From: [email-masked] (Alexander Sverdlin)
Date: Wed, 25 Nov 2015 12:50:42 +0100

Newly provided ep93xx_register_adc() could be used by machine-specific code
to create ADC platform device on Cirrus Logic EP93xx SoC-based machines.

Signed-off-by: Alexander Sverdlin <[email-masked]>
---
 arch/arm/mach-ep93xx/core.c                  | 24 ++++++++++++++++++++++++
 arch/arm/mach-ep93xx/include/mach/platform.h |  1 +
 arch/arm/mach-ep93xx/soc.h                   |  1 +
 3 files changed, 26 insertions(+)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index c393b1b..f53c618 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -821,6 +821,30 @@ void ep93xx_ide_release_gpio(struct platform_device *pdev)
 EXPORT_SYMBOL(ep93xx_ide_release_gpio);

 /*************************************************************************
+ * EP93xx ADC
+ *************************************************************************/
+static struct resource ep93xx_adc_resources[] = {
+	DEFINE_RES_MEM(EP93XX_ADC_PHYS_BASE, 0x28),
+	DEFINE_RES_IRQ(IRQ_EP93XX_TOUCH),
+};
+
+static struct platform_device ep93xx_adc_device = {
+	.name		= "ep93xx-adc",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(ep93xx_adc_resources),
+	.resource	= ep93xx_adc_resources,
+};
+
+void __init ep93xx_register_adc(void)
+{
+	/* Power up ADC, deactivate Touch Screen Controller */
+	ep93xx_devcfg_set_clear(EP93XX_SYSCON_DEVCFG_TIN,
+				EP93XX_SYSCON_DEVCFG_ADCPD);
+
+	platform_device_register(&ep93xx_adc_device);
+}
+
+/*************************************************************************
  * EP93xx Security peripheral
  *************************************************************************/

diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index 4c0bbd9..db08396 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -52,6 +52,7 @@ int ep93xx_i2s_acquire(void);
 void ep93xx_i2s_release(void);
 void ep93xx_register_ac97(void);
 void ep93xx_register_ide(void);
+void ep93xx_register_adc(void);
 int ep93xx_ide_acquire_gpio(struct platform_device *pdev);
 void ep93xx_ide_release_gpio(struct platform_device *pdev);

diff --git a/arch/arm/mach-ep93xx/soc.h b/arch/arm/mach-ep93xx/soc.h
index 7bf7ff8..d20e631 100644
--- a/arch/arm/mach-ep93xx/soc.h
+++ b/arch/arm/mach-ep93xx/soc.h
@@ -95,6 +95,7 @@
 #define EP93XX_KEY_MATRIX_PHYS_BASE	EP93XX_APB_PHYS(0x000f0000)
 #define EP93XX_KEY_MATRIX_BASE		EP93XX_APB_IOMEM(0x000f0000)

+#define EP93XX_ADC_PHYS_BASE		EP93XX_APB_PHYS(0x00100000)
 #define EP93XX_ADC_BASE			EP93XX_APB_IOMEM(0x00100000)
 #define EP93XX_TOUCHSCREEN_BASE		EP93XX_APB_IOMEM(0x00100000)