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ARM64: dts: meson: meson-gx: add the SAR ADC

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Add the SAR ADC to meson-gxbb.dtsi and meson-gxl.dtsi. GXBB provides a
10-bit ADC while GXL and GXM provide a 12-bit ADC.
Some boards use resistor ladder buttons connected through one of the ADC
channels. On newer devices (GXL and GXM) some boards use pull-ups/downs
to change the resistance (and thus the ADC value) on one of the ADC
channels to indicate the board revision.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Martin Blumenstingl 2017-01-22 19:17:14 +01:00 committed by Kevin Hilman
parent 249a2243e9
commit bd80ef5ed4
4 changed files with 32 additions and 0 deletions
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8
arch/arm64/boot/dts/amlogic/meson-gx.dtsi
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@ -237,6 +237,14 @@
status = "disabled";
};
saradc: adc@8680 {
compatible = "amlogic,meson-saradc";
reg = <0x0 0x8680 0x0 0x34>;
#io-channel-cells = <1>;
interrupts = <GIC_SPI 73 IRQ_TYPE_EDGE_RISING>;
status = "disabled";
};
pwm_ef: pwm@86c0 {
compatible = "amlogic,meson-gx-pwm", "amlogic,meson-gxbb-pwm";
reg = <0x0 0x086c0 0x0 0x10>;

10
arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
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@ -490,6 +490,16 @@
clocks = <&clkc CLKID_I2C>;
};
&saradc {
compatible = "amlogic,meson-gxbb-saradc", "amlogic,meson-saradc";
clocks = <&xtal>,
<&clkc CLKID_SAR_ADC>,
<&clkc CLKID_SANA>,
<&clkc CLKID_SAR_ADC_CLK>,
<&clkc CLKID_SAR_ADC_SEL>;
clock-names = "clkin", "core", "sana", "adc_clk", "adc_sel";
};
&sd_emmc_a {
clocks = <&clkc CLKID_SD_EMMC_A>,
<&xtal>,

10
arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
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@ -347,6 +347,16 @@
clocks = <&clkc CLKID_I2C>;
};
&saradc {
compatible = "amlogic,meson-gxl-saradc", "amlogic,meson-saradc";
clocks = <&xtal>,
<&clkc CLKID_SAR_ADC>,
<&clkc CLKID_SANA>,
<&clkc CLKID_SAR_ADC_CLK>,
<&clkc CLKID_SAR_ADC_SEL>;
clock-names = "clkin", "core", "sana", "adc_clk", "adc_sel";
};
&sd_emmc_a {
clocks = <&clkc CLKID_SD_EMMC_A>,
<&xtal>,

4
arch/arm64/boot/dts/amlogic/meson-gxm.dtsi
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@ -117,6 +117,10 @@
};
};
&saradc {
compatible = "amlogic,meson-gxm-saradc", "amlogic,meson-saradc";
};
&scpi_dvfs {
clock-indices = <0 1>;
clock-output-names = "vbig", "vlittle";