mvf_adc: Initial touchscreen support

The Vybrid VF50 support 4-wire touchscreens using FETs and
ADC inputs. This drivers extends the ADC driver to deliver
initial support for this interface.

4 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/mach-mvf/board-colibri_vf50.c b/arch/arm/mach-mvf/board-colibri_vf50.c
index 622aad8bf7aa..de76b3612ce1 100644
--- a/arch/arm/mach-mvf/board-colibri_vf50.c
+++ b/arch/arm/mach-mvf/board-colibri_vf50.c
@@ -392,6 +392,7 @@ static void __init mvf_init_adc(void)
 {
 	mvf_add_adc(0);
 	mvf_add_adc(1);
+	mvf_add_adc_touch(0);
 }
 
 /*!
diff --git a/arch/arm/mach-mvf/devices-mvf.h b/arch/arm/mach-mvf/devices-mvf.h
index c434834ba0b2..29949074cf44 100644
--- a/arch/arm/mach-mvf/devices-mvf.h
+++ b/arch/arm/mach-mvf/devices-mvf.h
@@ -148,6 +148,10 @@ extern const struct mvf_adc_data mvfa5_adc_data[] __initconst;
 #define mvf_add_adc(id)	\
 	mvf_add_adcdev(&mvfa5_adc_data[id])
 
+extern const struct mvf_adc_touch mvfa5_adc_touch[] __initconst;
+#define mvf_add_adc_touch(id)	\
+	mvf_add_adc_touchdev(&mvfa5_adc_touch[id])
+
 extern const struct imx_imx2_wdt_data fsl_imx2_wdt_data[] __initconst;
 #define mvf_add_wdt(id)   \
 	imx_add_imx2_wdt(&fsl_imx2_wdt_data[id])
diff --git a/arch/arm/plat-mxc/devices/platform-mvf-adc.c b/arch/arm/plat-mxc/devices/platform-mvf-adc.c
index 029e8e3a39ae..259251c91fb8 100644
--- a/arch/arm/plat-mxc/devices/platform-mvf-adc.c
+++ b/arch/arm/plat-mxc/devices/platform-mvf-adc.c
@@ -28,6 +28,12 @@ const struct mvf_adc_data mvfa5_adc_data[] __initconst = {
 	mvf_adc_data_entry(MVF, 0, SZ_4K),
 	mvf_adc_data_entry(MVF, 1, SZ_4K),
 };
+
+const struct mvf_adc_touch mvfa5_adc_touch[] __initconst = {
+	[0] = {
+		.id = 0
+	}
+};
 #endif
 
 struct platform_device *__init mvf_add_adcdev(
@@ -49,3 +55,10 @@ struct platform_device *__init mvf_add_adcdev(
 	return imx_add_platform_device("mvf-adc", data->id, res,
 			ARRAY_SIZE(res), NULL, 0);
 }
+
+struct platform_device *__init mvf_add_adc_touchdev(
+		const struct mvf_adc_touch *data)
+{
+	return imx_add_platform_device("mvf-adc-ts", data->id, NULL, 0,
+			NULL, 0);
+}
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index 0e2a2a1d13e9..0de55332cff6 100755
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -97,6 +97,11 @@ struct mvf_adc_data {
 };
 struct platform_device *__init mvf_add_adcdev(
 		const struct mvf_adc_data *data);
+struct mvf_adc_touch {
+	int id;
+};
+struct platform_device *__init mvf_add_adc_touchdev(
+		const struct mvf_adc_touch *data);
 
 struct imx_imxdi_rtc_data {
 	resource_size_t iobase;