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3aacc5bba7
Add a new compatible for the additional emmc2 controller on BCM2711 and clearify usage. Signed-off-by: Stefan Wahren <wahrenst@gmx.net> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
37 lines
1.1 KiB
Text
37 lines
1.1 KiB
Text
Broadcom IPROC SDHCI controller
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This file documents differences between the core properties described
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by mmc.txt and the properties that represent the IPROC SDHCI controller.
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Required properties:
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- compatible : Should be one of the following
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"brcm,bcm2835-sdhci"
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"brcm,bcm2711-emmc2"
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"brcm,sdhci-iproc-cygnus"
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"brcm,sdhci-iproc"
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Use brcm2835-sdhci for the eMMC controller on the BCM2835 (Raspberry Pi) and
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bcm2711-emmc2 for the additional eMMC2 controller on BCM2711.
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Use sdhci-iproc-cygnus for Broadcom SDHCI Controllers
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restricted to 32bit host accesses to SDHCI registers.
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Use sdhci-iproc for Broadcom SDHCI Controllers that allow standard
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8, 16, 32-bit host access to SDHCI register.
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- clocks : The clock feeding the SDHCI controller.
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Optional properties:
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- sdhci,auto-cmd12: specifies that controller should use auto CMD12.
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Example:
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sdhci0: sdhci@18041000 {
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compatible = "brcm,sdhci-iproc-cygnus";
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reg = <0x18041000 0x100>;
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interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&lcpll0_clks BCM_CYGNUS_LCPLL0_SDIO_CLK>;
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bus-width = <4>;
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sdhci,auto-cmd12;
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no-1-8-v;
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};
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