adc: rockchip-saradc: Add support for RK3528

The Successive Approximation ADC (SARADC) in RK3528 uses the v2
controller and support:
- 10-bit resolution
- Up to 1MS/s sampling rate
- 4 single-ended input channels
- Current consumption: 0.5mA @ 1MS/s

Add support for the 4 channels of 10-bit resolution supported by SARADC
in RK3528.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/drivers/adc/rockchip-saradc.c b/drivers/adc/rockchip-saradc.c
index 7cf9735..1515951 100644 (file)
--- a/drivers/adc/rockchip-saradc.c
+++ b/drivers/adc/rockchip-saradc.c
@@ -339,6 +339,14 @@ static const struct rockchip_saradc_data rk3399_saradc_data = {
        .stop = rockchip_saradc_stop_v1,
 };
 
+static const struct rockchip_saradc_data rk3528_saradc_data = {
+       .num_bits = 10,
+       .num_channels = 4,
+       .clk_rate = 1000000,
+       .channel_data = rockchip_saradc_channel_data_v2,
+       .start_channel = rockchip_saradc_start_channel_v2,
+};
+
 static const struct rockchip_saradc_data rk3588_saradc_data = {
        .num_bits = 12,
        .num_channels = 8,
@@ -354,6 +362,8 @@ static const struct udevice_id rockchip_saradc_ids[] = {
          .data = (ulong)&rk3066_tsadc_data },
        { .compatible = "rockchip,rk3399-saradc",
          .data = (ulong)&rk3399_saradc_data },
+       { .compatible = "rockchip,rk3528-saradc",
+         .data = (ulong)&rk3528_saradc_data },
        { .compatible = "rockchip,rk3588-saradc",
          .data = (ulong)&rk3588_saradc_data },
        { }