58 lines
1.9 KiB
Diff
58 lines
1.9 KiB
Diff
From 8a9aa0bbd615c9b377bd82e671519f0c4cb272dd Mon Sep 17 00:00:00 2001
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From: Jonas Karlman <jonas@kwiboo.se>
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Date: Thu, 27 Feb 2025 18:40:51 +0000
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Subject: [PATCH] iio: adc: rockchip_saradc: Add support for RK3528
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The Successive Approximation ADC (SARADC) in RK3528 uses the v2
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controller and support:
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- 10-bit resolution
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- Up to 1MS/s sampling rate
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- 4 single-ended input channels
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- Current consumption: 0.5mA @ 1MS/s
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Add support for the 4 channels of 10-bit resolution supported by SARADC
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in RK3528.
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Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
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Reviewed-by: Heiko Stuebner <heiko@sntech.de>
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Link: https://patch.msgid.link/20250227184058.2964204-3-jonas@kwiboo.se
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Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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---
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drivers/iio/adc/rockchip_saradc.c | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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--- a/drivers/iio/adc/rockchip_saradc.c
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+++ b/drivers/iio/adc/rockchip_saradc.c
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@@ -275,6 +275,21 @@ static const struct rockchip_saradc_data
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.power_down = rockchip_saradc_power_down_v1,
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};
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+static const struct iio_chan_spec rockchip_rk3528_saradc_iio_channels[] = {
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+ SARADC_CHANNEL(0, "adc0", 10),
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+ SARADC_CHANNEL(1, "adc1", 10),
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+ SARADC_CHANNEL(2, "adc2", 10),
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+ SARADC_CHANNEL(3, "adc3", 10),
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+};
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+
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+static const struct rockchip_saradc_data rk3528_saradc_data = {
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+ .channels = rockchip_rk3528_saradc_iio_channels,
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+ .num_channels = ARRAY_SIZE(rockchip_rk3528_saradc_iio_channels),
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+ .clk_rate = 1000000,
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+ .start = rockchip_saradc_start_v2,
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+ .read = rockchip_saradc_read_v2,
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+};
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+
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static const struct iio_chan_spec rockchip_rk3568_saradc_iio_channels[] = {
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SARADC_CHANNEL(0, "adc0", 10),
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SARADC_CHANNEL(1, "adc1", 10),
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@@ -325,6 +340,9 @@ static const struct of_device_id rockchi
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.compatible = "rockchip,rk3399-saradc",
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.data = &rk3399_saradc_data,
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}, {
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+ .compatible = "rockchip,rk3528-saradc",
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+ .data = &rk3528_saradc_data,
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+ }, {
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.compatible = "rockchip,rk3568-saradc",
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.data = &rk3568_saradc_data,
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}, {
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