From mboxrd@z Thu Jan 1 00:00:00 1970 From: martin.blumenstingl@googlemail.com (Martin Blumenstingl) Date: Thu, 19 Jan 2017 15:58:22 +0100 Subject: [PATCH v3 4/4] ARM64: dts: meson: meson-gx: add the SAR ADC In-Reply-To: <20170119145822.26239-1-martin.blumenstingl@googlemail.com> References: <20170115224221.15510-1-martin.blumenstingl@googlemail.com> <20170119145822.26239-1-martin.blumenstingl@googlemail.com> Message-ID: <20170119145822.26239-5-martin.blumenstingl@googlemail.com> To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org Add the SAR ADC to meson-gxbb.dtsi and meson-gxl.dtsi. GXBB provides a 10-bit ADC while GXL (and GXM, which uses the same ADC as GXL) provides 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 of the ADC channels to indicate the board revision. Signed-off-by: Martin Blumenstingl Tested-by: Neil Armstrong --- arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 8 ++++++++ arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 10 ++++++++++ arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 10 ++++++++++ 3 files changed, 28 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi index 99e6a8d5cb9e..55abfb74aab2 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi @@ -255,6 +255,14 @@ status = "disabled"; }; + saradc: adc at 8680 { + compatible = "amlogic,meson-saradc"; + #io-channel-cells = <1>; + status = "disabled"; + reg = <0x0 0x8680 0x0 0x34>; + interrupts = ; + }; + pwm_ef: pwm at 86c0 { compatible = "amlogic,meson-gx-pwm", "amlogic,meson-gxbb-pwm"; reg = <0x0 0x086c0 0x0 0x10>; diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi index 39a774ad83ce..04b3324bc132 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi @@ -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>, diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi index bdf2305a2e25..7c72dbcef1ba 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi @@ -340,6 +340,16 @@ 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>, -- 2.11.0