[PATCH v3 3/5] ep93xx: Add ADC platform device support to core
Alexander Sverdlin
alexander.sverdlin at gmail.com
Sun May 14 02:29:52 PDT 2017
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 <alexander.sverdlin at gmail.com>
---
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 c393b1b0310d..f53c61813998 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 4c0bbd97f741..db0839691ef5 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 7bf7ff8beae7..d20e631164cf 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)
--
2.12.2
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