From mboxrd@z Thu Jan 1 00:00:00 1970 From: flora.fu@mediatek.com (Flora Fu) Date: Mon, 17 Nov 2014 15:40:24 +0800 Subject: [PATCH 4/7] dt-bindings: Add document for MT6397 MFD In-Reply-To: <1416210027-5562-1-git-send-email-flora.fu@mediatek.com> References: <1416210027-5562-1-git-send-email-flora.fu@mediatek.com> Message-ID: <1416210027-5562-5-git-send-email-flora.fu@mediatek.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Signed-off-by: Flora Fu --- Documentation/devicetree/bindings/mfd/mt6397.txt | 87 ++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/mt6397.txt diff --git a/Documentation/devicetree/bindings/mfd/mt6397.txt b/Documentation/devicetree/bindings/mfd/mt6397.txt new file mode 100644 index 0000000..0783368 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/mt6397.txt @@ -0,0 +1,87 @@ +MediaTek MT6397 multifunction device + +MT6397 is a multifunction device with the following sub modules: +- PMIC +- Regulator +- RTC +- Audio codec +- GPIO +- Clock + +It is interfaced to host controller using SPI interface by a proprietary hardware +called pmic wrapper or pwrap. This document describes the binding for mfd device +and PMIC sub module. + +Required properties in pwrap device node. +- compatible:"mediatek,mt8135-pwrap"; +- interrupts : This pmic wrapper device has an IRQ line connected to the main SoC. +- reg: Specifies the address of pwrap in AP. +- resets: reset bit for pwrap +- clock: clock frequency selection in SPI bus. +- pmic: Mediatek PMIC used pwrap as its communication protocol. + +Example: + pwrap: pwrap at 1000f000 { + compatible = "mediatek,mt8135-pwrap"; + reg = <0 0x1000f000 0 0x1000>, + <0 0x11017000 0 0x1000>; + reg-names = "pwrap-base", "pwrap-bridge-base"; + interrupts = ; + resets = <&infrarst MT8135_INFRA_PMIC_WRAP_RST>, + <&perirst MT8135_PERI_PWRAP_BRIDGE_SW_RST>; + reset-names = "infra-pwrap-rst", + "peri-pwrap-bridge-rst"; + clocks = <&pmicspi_sel>, <&clk26m> ; + clock-names = "pmicspi-sel", "pmicspi-parent"; + + pmic { + compatible = "mediatek,mt6397"; + } + +MT6397 MFD device should in pwrap device node. +Optional properties: +- codec: Audio Codec +- pinctrl: GPIO in mt6397 +- rtc: RTC +- clock: clocks in mt6397 +- regulators : The regulators of mt6397 + regulators { + regulator constratints. + refer Documentation/devicetree/bindings/regulator/regulator.txt + }; + +Example: + pwrap: pwrap at 1000f000 { + [...] + pmic { + compatible = "mediatek,mt6397"; + + codec: mt6397codec { + compatible = "mediatek,mt6397-codec"; + }; + + pinctrl at 0x0000C000 { + compatible = "mediatek,mt6397-pinctrl"; + reg = <0 0x0000C000 0 0x0108>; + gpio-controller; + }; + + regulators { + mt6397_vpca15_reg: buck_vpca15 { + regulator-name = "vpca15"; + regulator-min-microvolt = < 700000>; + regulator-max-microvolt = <1493750>; + regulator-always-on; + regulator-boot-on; + }; + + mt6397_vpca7_reg: buck_vpca7 { + regulator-name = "vpca7"; + regulator-min-microvolt = < 700000>; + regulator-max-microvolt = <1493750>; + regulator-always-on; + regulator-boot-on; + }; + } + } + } \ No newline at end of file -- 1.8.1.1.dirty