github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-05 04:56:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

arm64: dts: meson: a1: add eMMC controller and its pins

Browse Source 
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>
This commit is contained in:
Jan Dakinevich 2023-08-24 00:36:25 +03:00 committed by Neil Armstrong
parent dba516fa19
commit 4d860a98bc
1 changed files with 43 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
arch/arm64/boot/dts/amlogic/meson-a1.dtsi
View File

@ -142,6 +142,32 @@ mux {
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_pll: pll-clock-controller@7c80 {
<&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 {