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| author | Jan Dakinevich <yvdakinevich@sberdevices.ru> | 2023-08-24 00:36:25 +0300 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2023-09-11 11:42:52 +0200 |
| commit | 4d860a98bcf39e946e3419f3d42120374590080f (patch) | |
| tree | 5879cec4a0fd5c4327e361f1a272ae16615d32c8 /arch/arm64/boot/dts/amlogic | |
| parent | dba516fa1981250ab2e27535926532564f658bb1 (diff) | |
| download | linux-4d860a98bcf39e946e3419f3d42120374590080f.tar.gz linux-4d860a98bcf39e946e3419f3d42120374590080f.tar.bz2 linux-4d860a98bcf39e946e3419f3d42120374590080f.zip | |
arm64: dts: meson: a1: add eMMC controller and its pins
The definition is inspired by a similar one for AXG SoC family.
'sdio_pins' and 'sdio_clk_gate_pins' pinctrls are supposed to be used as
"default" and "clk-gate" in board-specific device trees.
During initialization 'meson-gx' driver sets clock to safe low-frequency
value (400kHz). However, both source clocks ("clkin0" and "clkin1") are
high-frequency by default, and using of eMMC's internal divider is not
enough to achieve so low values. To provide low-frequency source,
reparent "sd_emmc_sel2" clock using 'assigned-clocks' property.
Signed-off-by: Jan Dakinevich <yvdakinevich@sberdevices.ru>
Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230823213630.12936-11-ddrokosov@sberdevices.ru
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Diffstat (limited to 'arch/arm64/boot/dts/amlogic')
| -rw-r--r-- | arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi index e2f7c719f9bb..d20712ffc2f8 100644 --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi @@ -142,6 +142,32 @@ bias-pull-down; }; }; + + sdio_pins: sdio { + mux0 { + groups = "sdcard_d0_x", + "sdcard_d1_x", + "sdcard_d2_x", + "sdcard_d3_x", + "sdcard_cmd_x"; + function = "sdcard"; + bias-pull-up; + }; + + mux1 { + groups = "sdcard_clk_x"; + function = "sdcard"; + bias-disable; + }; + }; + + sdio_clk_gate_pins: sdio-clk-gate { + mux { + groups = "sdcard_clk_x"; + function = "sdcard"; + bias-pull-down; + }; + }; }; gpio_intc: interrupt-controller@440 { @@ -208,6 +234,23 @@ <&clkc_periphs CLKID_HIFIPLL_IN>; clock-names = "fixpll_in", "hifipll_in"; }; + + sd_emmc: sd@10000 { + compatible = "amlogic,meson-axg-mmc"; + reg = <0x0 0x10000 0x0 0x800>; + interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clkc_periphs CLKID_SD_EMMC_A>, + <&clkc_periphs CLKID_SD_EMMC>, + <&clkc_pll CLKID_FCLK_DIV2>; + clock-names = "core", + "clkin0", + "clkin1"; + assigned-clocks = <&clkc_periphs CLKID_SD_EMMC_SEL2>; + assigned-clock-parents = <&xtal>; + resets = <&reset RESET_SD_EMMC_A>; + power-domains = <&pwrc PWRC_SD_EMMC_ID>; + status = "disabled"; + }; }; usb: usb@fe004400 { |