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drivers: iio: ti_am335x_adc: add dma support

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This patch adds the required pieces to ti_am335x_adc driver for
DMA support

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Mugunthan V N
2016-10-05 14:34:41 +05:30
committed by Jonathan Cameron
parent c9329d8638
commit f438b9da75
2 changed files with 152 additions and 3 deletions
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include/linux/mfd/ti_am335x_tscadc.h
+7
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@@ -23,6 +23,8 @@
#define REG_IRQENABLE 0x02C
#define REG_IRQCLR 0x030
#define REG_IRQWAKEUP 0x034
#define REG_DMAENABLE_SET 0x038
#define REG_DMAENABLE_CLEAR 0x03c
#define REG_CTRL 0x040
#define REG_ADCFSM 0x044
#define REG_CLKDIV 0x04C
@@ -36,6 +38,7 @@
#define REG_FIFO0THR 0xE8
#define REG_FIFO1CNT 0xF0
#define REG_FIFO1THR 0xF4
#define REG_DMA1REQ 0xF8
#define REG_FIFO0 0x100
#define REG_FIFO1 0x200
@@ -126,6 +129,10 @@
#define FIFOREAD_DATA_MASK (0xfff << 0)
#define FIFOREAD_CHNLID_MASK (0xf << 16)
/* DMA ENABLE/CLEAR Register */
#define DMA_FIFO0 BIT(0)
#define DMA_FIFO1 BIT(1)
/* Sequencer Status */
#define SEQ_STATUS BIT(5)
#define CHARGE_STEP 0x11