arm64: dts: marvell: armada-3720-db: Add vmmc regulator for SD slot
Subsystems (2)
PATCH 1/1 arm64: dts: marvell: armada-3720-db: Add vmmc regulator for SD slot
By adding this regulator, a proper reset is done during boot. Without this, the UHS failed to be detected after a warm reboot when the SD card remained in the slot, then it fallback to an HS.
Note that the vmcc is supported by the xenon driver only with the following fix: "mmc: sdhci-xenon: add set_power callback".
--- arch/arm64/boot/dts/marvell/armada-3720-db.dts | 11 +++++++++++ 1 file changed, 11 insertions(+)
arch/arm64/boot/dts/marvell/armada-3720-db.dts +11 -0
@@ -94,6 +94,16 @@ 3300000 0x0>; enable-active-high; }; + + vcc_sd_reg2: regulator-vmcc { + compatible = "regulator-fixed"; + regulator-name = "vcc_sd2"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + enable-active-high; + gpio = <&gpio_exp 4 GPIO_ACTIVE_HIGH>; + }; }; /* Gigabit module on CON19(V2.0)/CON21(V1.4) */
@@ -179,6 +189,7 @@ bus-width = <4>; marvell,pad-type = "sd"; vqmmc-supply = <&vcc_sd_reg1>; + vmmc-supply = <&vcc_sd_reg2>; status = "okay"; };
Signature · 1 line
2.14.1
PATCH 1/1 arm64: dts: marvell: armada-3720-db: Add vmmc regulator for SD slot
Hi,
Quoted 8 lines · Gregory CLEMENT
By adding this regulator, a proper reset is done during boot. Without this, the UHS failed to be detected after a warm reboot when the SD card remained in the slot, then it fallback to an HS.
Note that the vmcc is supported by the xenon driver only with the following fix: "mmc: sdhci-xenon: add
set_powercallback".Signed-off-by Gregory CLEMENT <[email protected]>
Applied on mvebu/dt64
Gregory
Quoted 36 lines
--- arch/arm64/boot/dts/marvell/armada-3720-db.dts | 11 +++++++++++ 1 file changed, 11 insertions(+)arch/arm64/boot/dts/marvell/armada-3720-db.dts +11
-0@@ -94,6 +94,16 @@ 3300000 0x0>; enable-active-high; }; + + vcc_sd_reg2: regulator-vmcc { + compatible = "regulator-fixed"; + regulator-name = "vcc_sd2"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + enable-active-high; + gpio = <&gpio_exp 4 GPIO_ACTIVE_HIGH>; + }; }; /* Gigabit module on CON19(V2.0)/CON21(V1.4) */@@ -179,6 +189,7 @@ bus-width = <4>; marvell,pad-type = "sd"; vqmmc-supply = <&vcc_sd_reg1>; + vmmc-supply = <&vcc_sd_reg2>; status = "okay"; };Signature · 1 line
2.14.1
Signature · 4 lines
Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com