From: kishon@ti.com (Kishon Vijay Abraham I) Date: Fri, 19 May 2017 13:45:33 +0530 Subject: [PATCH 33/41] ARM: dts: dra7: Add "max-frequency" property to MMC dt nodes In-Reply-To: <20170519081541.26753-1-kishon@ti.com> References: <20170519081541.26753-1-kishon@ti.com> Message-ID: <20170519081541.26753-34-kishon@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add "max-frequency" property to MMC dt nodes and set the maximum frequency to 192MHz for MMC1/MMC2, 64MHz for MMC3 and 192MHz for MMC4. pdata quirks must be utilized to detect presence of rev 1.1/1.0 of silicon and adjust maximum frequencies as per restrictions documented in i843. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Sekhar Nori --- arch/arm/boot/dts/dra7.dtsi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi index 5a262e1a0313..38fb1828e26a 100644 --- a/arch/arm/boot/dts/dra7.dtsi +++ b/arch/arm/boot/dts/dra7.dtsi @@ -1045,6 +1045,7 @@ dma-names = "tx", "rx"; status = "disabled"; pbias-supply = <&pbias_mmc_reg>; + max-frequency = <192000000>; }; mmc2: mmc at 480b4000 { @@ -1056,6 +1057,7 @@ dmas = <&sdma_xbar 47>, <&sdma_xbar 48>; dma-names = "tx", "rx"; status = "disabled"; + max-frequency = <192000000>; }; mmc3: mmc at 480ad000 { @@ -1067,6 +1069,8 @@ dmas = <&sdma_xbar 77>, <&sdma_xbar 78>; dma-names = "tx", "rx"; status = "disabled"; + /* Errata i887 limits max-frequency of MMC3 to 64 MHz */ + max-frequency = <64000000>; }; mmc4: mmc at 480d1000 { @@ -1078,6 +1082,7 @@ dmas = <&sdma_xbar 57>, <&sdma_xbar 58>; dma-names = "tx", "rx"; status = "disabled"; + max-frequency = <192000000>; }; mmu0_dsp1: mmu at 40d01000 { -- 2.11.0