From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Stanley Chu Subject: [PATCH v4 5/7] dt-bindings: scsi: ufs: Add document for ufs-mediatek Date: Wed, 13 Mar 2019 12:10:09 +0800 Message-ID: <1552450211-7149-7-git-send-email-stanley.chu@mediatek.com> In-Reply-To: <1552450211-7149-1-git-send-email-stanley.chu@mediatek.com> References: <1552450211-7149-1-git-send-email-stanley.chu@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain To: linux-scsi@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, robh@kernel.org, mark.rutland@arm.com, chunfeng.yun@mediatek.com, kishon@ti.com, martin.petersen@oracle.com, avri.altman@wdc.com, alim.akhtar@samsung.com, pedrom.sousa@synopsys.com Cc: vivek.gautam@codeaurora.org, subhashj@codeaurora.org, liwei213@huawei.com, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, kuohong.wang@mediatek.com, peter.wang@mediatek.com, chun-hung.wu@mediatek.com, Stanley Chu List-ID: Add UFS and UFS PHY node document for Mediatek SoC chips. Signed-off-by: Stanley Chu --- .../devicetree/bindings/ufs/ufs-mediatek.txt | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/ufs/ufs-mediatek.txt diff --git a/Documentation/devicetree/bindings/ufs/ufs-mediatek.txt b/Documentation/devicetree/bindings/ufs/ufs-mediatek.txt new file mode 100644 index 000000000000..9594e1cd7ecf --- /dev/null +++ b/Documentation/devicetree/bindings/ufs/ufs-mediatek.txt @@ -0,0 +1,44 @@ +* Mediatek Universal Flash Storage (UFS) Host Controller + +UFS nodes are defined to describe on-chip UFS hardware macro. +Each UFS Host Controller should have its own node. + +To bind UFS PHY with UFS host controller, the controller node should +contain a phandle reference to UFS M-PHY node. + +Required properties for UFS nodes: +- compatible : Compatible list, contains the following controller: + "mediatek,mt8183-ufshci" for MediaTek UFS host controller + present on MT81xx chipsets. +- reg : Address and length of the UFS register set. +- phys : phandle to m-phy. +- clocks : List of phandle and clock specifier pairs. +- clock-names : List of clock input name strings sorted in the same + order as the clocks property. "ufs-clk" is mandatory. +- freq-table-hz : Array of operating frequencies stored in the same + order as the clocks property. If this property is not + defined or a value in the array is "0" then it is assumed + that the frequency is set by the parent clock or a + fixed rate clock source. +- vcc-supply : Power to the UFS device. +- vcc-fixed-regulator: Specify that vcc-supply is a fixed regulator. + +Example: + + ufsphy: phy@11fa0000 { + ... + }; + + ufshci@11270000 { + compatible = "mediatek,mt8183-ufshci"; + reg = <0 0x11270000 0 0x2300>; + interrupts = ; + phys = <&ufsphy>; + + clocks = <&infracfg_ao INFRACFG_AO_UFS_CG>; + clock-names = "ufs-clk"; + freq-table-hz = <0 0>; + + vcc-supply = <&mt_pmic_vemc_ldo_reg>; + vcc-fixed-regulator; + }; -- 2.18.0