[PATCH 2/4] iio: adc: rockchip_saradc: Add support for RK3528
From: Jonas Karlman <jonas@kwiboo.se>
Date: 2025-02-27 18:52:14
Also in:
linux-devicetree, linux-iio, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, iio subsystem and drivers, the rest · Maintainers:
Heiko Stuebner, Jonathan Cameron, Linus Torvalds
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> --- drivers/iio/adc/rockchip_saradc.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index a29e54754c8f..2619547d5d6f 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c@@ -275,6 +275,21 @@ static const struct rockchip_saradc_data rk3399_saradc_data = { .power_down = rockchip_saradc_power_down_v1, }; +static const struct iio_chan_spec rockchip_rk3528_saradc_iio_channels[] = { + SARADC_CHANNEL(0, "adc0", 10), + SARADC_CHANNEL(1, "adc1", 10), + SARADC_CHANNEL(2, "adc2", 10), + SARADC_CHANNEL(3, "adc3", 10), +}; + +static const struct rockchip_saradc_data rk3528_saradc_data = { + .channels = rockchip_rk3528_saradc_iio_channels, + .num_channels = ARRAY_SIZE(rockchip_rk3528_saradc_iio_channels), + .clk_rate = 1000000, + .start = rockchip_saradc_start_v2, + .read = rockchip_saradc_read_v2, +}; + static const struct iio_chan_spec rockchip_rk3568_saradc_iio_channels[] = { SARADC_CHANNEL(0, "adc0", 10), SARADC_CHANNEL(1, "adc1", 10),
@@ -324,6 +339,9 @@ static const struct of_device_id rockchip_saradc_match[] = { }, { .compatible = "rockchip,rk3399-saradc", .data = &rk3399_saradc_data, + }, { + .compatible = "rockchip,rk3528-saradc", + .data = &rk3528_saradc_data, }, { .compatible = "rockchip,rk3568-saradc", .data = &rk3568_saradc_data,
--
2.48.1