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>

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
index e2f7c719f9bb584adc5292ead0f04ccea6109447..d20712ffc2f831e900966591771619ecca7b9ce3 100644 (file)
--- 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 {