From ab4394e2139726bae54941474e3d8d94c6894f99 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan.agner@toradex.com>
Date: Mon, 9 Dec 2013 13:23:53 +0100
Subject: mfd: stmpe: add ADC block resources

In order to use the auxiliar ADC inputs of STMPE811 devices we need
to add resources for the ADC block. Also move the ADC macros from
the touchscreen driver to the general header file. We will need them
for the ADC driver in future.
---
 drivers/input/touchscreen/stmpe-ts.c | 11 -----------
 drivers/mfd/stmpe.c                  | 24 ++++++++++++++++++++++++
 include/linux/mfd/stmpe.h            | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+), 11 deletions(-)

diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index 502c267255b3..dbd94f3c957a 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -48,17 +48,6 @@
 
 #define STMPE_IRQ_TOUCH_DET		0
 
-#define SAMPLE_TIME(x)			((x & 0xf) << 4)
-#define MOD_12B(x)			((x & 0x1) << 3)
-#define REF_SEL(x)			((x & 0x1) << 1)
-#define ADC_FREQ(x)			(x & 0x3)
-#define AVE_CTRL(x)			((x & 0x3) << 6)
-#define DET_DELAY(x)			((x & 0x7) << 3)
-#define SETTLING(x)			(x & 0x7)
-#define FRACTION_Z(x)			(x & 0x7)
-#define I_DRIVE(x)			(x & 0x1)
-#define OP_MODE(x)			((x & 0x7) << 1)
-
 #define STMPE_TS_NAME			"stmpe-ts"
 #define XY_MASK				0xfff
 
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 2963689cf45c..0c556fa65dd2 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -349,6 +349,25 @@ static struct mfd_cell stmpe_ts_cell = {
 	.num_resources	= ARRAY_SIZE(stmpe_ts_resources),
 };
 
+/*
+ * ADC (STMPE811)
+ */
+
+static struct resource stmpe_adc_resources[] = {
+	{
+		.name	= "STMPE_ADC",
+		.start	= 0,
+		.end	= 0,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct mfd_cell stmpe_adc_cell = {
+	.name		= "stmpe-adc",
+	.resources	= stmpe_adc_resources,
+	.num_resources	= ARRAY_SIZE(stmpe_adc_resources),
+};
+
 /*
  * STMPE811
  */
@@ -381,6 +400,11 @@ static struct stmpe_variant_block stmpe811_blocks[] = {
 		.irq	= STMPE811_IRQ_TOUCH_DET,
 		.block	= STMPE_BLOCK_TOUCHSCREEN,
 	},
+	{
+		.cell	= &stmpe_adc_cell,
+		.irq	= STMPE811_IRQ_ADC,
+		.block	= STMPE_BLOCK_ADC,
+	},
 };
 
 static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
index be1af7c42e57..b584ea64a16a 100644
--- a/include/linux/mfd/stmpe.h
+++ b/include/linux/mfd/stmpe.h
@@ -10,6 +10,17 @@
 
 #include <linux/device.h>
 
+#define SAMPLE_TIME(x)			((x & 0xf) << 4)
+#define MOD_12B(x)			((x & 0x1) << 3)
+#define REF_SEL(x)			((x & 0x1) << 1)
+#define ADC_FREQ(x)			(x & 0x3)
+#define AVE_CTRL(x)			((x & 0x3) << 6)
+#define DET_DELAY(x)			((x & 0x7) << 3)
+#define SETTLING(x)			(x & 0x7)
+#define FRACTION_Z(x)			(x & 0x7)
+#define I_DRIVE(x)			(x & 0x1)
+#define OP_MODE(x)			((x & 0x7) << 1)
+
 enum stmpe_block {
 	STMPE_BLOCK_GPIO	= 1 << 0,
 	STMPE_BLOCK_KEYPAD	= 1 << 1,
@@ -173,6 +184,26 @@ struct stmpe_ts_platform_data {
        u8 i_drive;
 };
 
+/**
+ * struct stmpe_adc_platform_data - stmpe811 adc controller platform
+ * data
+ * @sample_time: ADC converstion time in number of clock.
+ * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
+ * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
+ * recommended is 4.
+ * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
+ * @ref_sel: ADC reference source
+ * (0 -> internal reference, 1 -> external reference)
+ * @adc_freq: ADC Clock speed
+ * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
+ */
+struct stmpe_adc_platform_data {
+       u8 sample_time;
+       u8 mod_12b;
+       u8 ref_sel;
+       u8 adc_freq;
+};
+
 /**
  * struct stmpe_platform_data - STMPE platform data
  * @id: device id to distinguish between multiple STMPEs on the same board
@@ -199,6 +230,7 @@ struct stmpe_platform_data {
 	struct stmpe_gpio_platform_data *gpio;
 	struct stmpe_keypad_platform_data *keypad;
 	struct stmpe_ts_platform_data *ts;
+	struct stmpe_adc_platform_data *adc;
 };
 
 #define STMPE_NR_INTERNAL_IRQS	9
-- 
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