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| author |   Aswath Govindraju <a-govindraju@ti.com> | 2021-05-29 09:07:49 +0530 |
|---|---|---|
| committer |   Nishanth Menon <nm@ti.com> | 2021-06-07 09:54:12 -0500 |
| commit | 79b08ae7c411840ea5a9fba349025d217e700576 (patch) | |
| tree | c6cb71d9bf98b45f3b83daee7107f330cae5deae /arch/arm64/boot/dts/ti/k3-am654-base-board.dts | |
| parent | arm64: dts: ti: k3-am654x/j721e/j7200-common-proc-board: Fix MCU_RGMII1_TXC direction (diff) | |
| download | linux-dev-79b08ae7c411840ea5a9fba349025d217e700576.tar.xz linux-dev-79b08ae7c411840ea5a9fba349025d217e700576.zip | |
arm64: dts: ti: k3-am65: Add support for UHS-I modes in MMCSD1 subsystem
UHS-I speed modes are supported in AM65 S.R. 2.0 SoC[1].
Add support by removing the no-1-8-v tag and including the voltage
regulator device tree nodes for power cycling.
However, the 4 bit interface of AM65 SR 1.0 cannot be supported at 3.3 V or
1.8 V because of erratas i2025 and i2026 [2]. As the SD card is the primary
boot mode for development usecases, continue to enable SD card and disable
UHS-I modes in it to minimize any ageing issues happening because of
erratas.
k3-am6528-iot2050-basic and k3-am6548-iot2050-advanced boards use S.R. 1.0
version of AM65 SoC. Therefore, add no-1-8-v in sdhci1 device tree node of
the common iot2050 device tree file.
[1] - https://www.ti.com/lit/ug/spruid7e/spruid7e.pdf, section 12.3.6.1.1
[2] - https://www.ti.com/lit/er/sprz452e/sprz452e.pdf
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20210529033749.6250-1-a-govindraju@ti.com
Diffstat (limited to 'arch/arm64/boot/dts/ti/k3-am654-base-board.dts')
| -rw-r--r-- | arch/arm64/boot/dts/ti/k3-am654-base-board.dts | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts index 97c344088483..60e43fd7af12 100644 --- a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts +++ b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts @@ -85,6 +85,38 @@ gpios = <&wkup_gpio0 27 GPIO_ACTIVE_LOW>; }; }; + + evm_12v0: fixedregulator-evm12v0 { + /* main supply */ + compatible = "regulator-fixed"; + regulator-name = "evm_12v0"; + regulator-min-microvolt = <12000000>; + regulator-max-microvolt = <12000000>; + regulator-always-on; + regulator-boot-on; + }; + + vcc3v3_io: fixedregulator-vcc3v3io { + /* Output of TPS54334 */ + compatible = "regulator-fixed"; + regulator-name = "vcc3v3_io"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-always-on; + regulator-boot-on; + vin-supply = <&evm_12v0>; + }; + + vdd_mmc1_sd: fixedregulator-sd { + compatible = "regulator-fixed"; + regulator-name = "vdd_mmc1_sd"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + enable-active-high; + vin-supply = <&vcc3v3_io>; + gpio = <&pca9554 4 GPIO_ACTIVE_HIGH>; + }; }; &wkup_pmx0 { @@ -327,6 +359,7 @@ * disable sdhci1 */ &sdhci1 { + vmmc-supply = <&vdd_mmc1_sd>; pinctrl-names = "default"; pinctrl-0 = <&main_mmc1_pins_default>; ti,driver-strength-ohm = <50>; |