[PATCH] iio: adc: rockchip_saradc: add saradc support for rk3399

[David Wu]

The ADC is a 6-channel signal-ended 10-bit Successive
Approximation Register (SAR) A/D Converter.

Signed-off-by: David Wu <david...@rock-chips.com>
---
 .../devicetree/bindings/iio/adc/rockchip-saradc.txt   |  6 +++++-
 drivers/iio/adc/rockchip_saradc.c                     | 19 +++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt 
b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt
index a9a5fe1..bf99e2f 100644
--- a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.txt
@@ -1,7 +1,11 @@
 Rockchip Successive Approximation Register (SAR) A/D Converter bindings
 
 Required properties:
-- compatible: Should be "rockchip,saradc" or "rockchip,rk3066-tsadc"
+- compatible: should be "rockchip,<name>-saradc" or "rockchip,rk3066-tsadc"
+   - "rockchip,saradc": for rk3188, rk3288
+   - "rockchip,rk3066-tsadc": for rk3036
+   - "rockchip,rk3399-saradc": for rk3399
+
 - reg: physical base address of the controller and length of memory mapped
        region.
 - interrupts: The interrupt number to the cpu. The interrupt specifier format
diff --git a/drivers/iio/adc/rockchip_saradc.c 
b/drivers/iio/adc/rockchip_saradc.c
index 9c311c1..f9ad6c2 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -159,6 +159,22 @@ static const struct rockchip_saradc_data rk3066_tsadc_data 
= {
        .clk_rate = 50000,
 };
 
+static const struct iio_chan_spec rockchip_rk3399_saradc_iio_channels[] = {
+       ADC_CHANNEL(0, "adc0"),
+       ADC_CHANNEL(1, "adc1"),
+       ADC_CHANNEL(2, "adc2"),
+       ADC_CHANNEL(3, "adc3"),
+       ADC_CHANNEL(4, "adc4"),
+       ADC_CHANNEL(5, "adc5"),
+};
+
+static const struct rockchip_saradc_data rk3399_saradc_data = {
+       .num_bits = 10,
+       .channels = rockchip_rk3399_saradc_iio_channels,
+       .num_channels = ARRAY_SIZE(rockchip_rk3399_saradc_iio_channels),
+       .clk_rate = 1000000,
+};
+
 static const struct of_device_id rockchip_saradc_match[] = {
        {
                .compatible = "rockchip,saradc",
@@ -166,6 +182,9 @@ static const struct of_device_id rockchip_saradc_match[] = {
        }, {
                .compatible = "rockchip,rk3066-tsadc",
                .data = &rk3066_tsadc_data,
+       }, {
+               .compatible = "rockchip,rk3399-saradc",
+               .data = &rk3399_saradc_data,
        },
        {},
 };
-- 
1.9.1