Re: [PATCH] arm64: dts: ti: k3-j784s4-evm: Add eMMC mmc0 support

Nishanth Menon
2023-03-30T18:27:55Z

On 23:14-20230330, Bhavya Kapoor wrote:
>
> On 30/03/23 20:54, Nishanth Menon wrote:
> > On 11:50-20230330, Bhavya Kapoor wrote:
> >> On 27/03/23 14:01, Apurva Nandan wrote:
> >>> Add support for eMMC card connected to main sdhci0 instance.
> >>>
> >>> Signed-off-by: Apurva Nandan <a-nandan@ti.com>
> >> Reviewed-by: Bhavya Kapoor <b-kapoor@ti.com>
> >>
> >>> ---
> >>> arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 9 +++++++++
> >>> 1 file changed, 9 insertions(+)
> >>>
> >>> diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> >>> index 7480f37e89e8..1622a01a4667 100644
> >>> --- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> >>> +++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
> >>> @@ -21,6 +21,7 @@ chosen {
> >>>
> >>> aliases {
> >>> serial2 = &main_uart8;
> >>> + mmc0 = &main_sdhci0;
> >>> mmc1 = &main_sdhci1;
> >>> i2c0 = &main_i2c0;
> >>> };
> >>> @@ -225,6 +226,14 @@ exp2: gpio@22 {
> >>> };
> >>> };
> >>>
> >>> +&main_sdhci0 {
> >>> + /* eMMC */
> >>> + status = "okay";
> >>> + non-removable;
> >>> + ti,driver-strength-ohm = <50>;
> >>> + disable-wp;
> >>> +};
> >>> +
> >>> &main_sdhci1 {
> >>> /* SD card */
> >>> status = "okay";
> >>> --
> >>> 2.34.1
> >> Looks correct to me.
> >
> > Don't you need pinmux?
> >
> Hi Nishanth, pinmux is not needed since there is no mux options for emmc pins (mmc0) in datasheet.
>
>  -> Kindly refer to datasheet for same : https://www.ti.com/lit/ds/symlink/tda4vh-q1.pdf?ts=1680197698102&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTDA4VH-Q1%253FkeyMatch%253DTDA4VH%2BDATASHEET

Aah, yes - thanks for clarifying.