linux-kernel - Re: [RFC PATCH 11/13] arm64: dts: ti: k3-am62p: Add missing properties for MMC

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Message-ID: <c94b7399-31c0-4e7d-a616-8f29c86a27ba@ti.com>
Date: Mon, 12 Feb 2024 17:38:54 -0600
From: Judith Mendez <jm@...com>
To: Roger Quadros <rogerq@...nel.org>, Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: Adrian Hunter <adrian.hunter@...el.com>, <linux-mmc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Nishanth Menon <nm@...com>,
        Vignesh
 Raghavendra <vigneshr@...com>, Andrew Davis <afd@...com>,
        Udit Kumar
	<u-kumar1@...com>, <devicetree@...r.kernel.org>,
        Randolph Sapp <rs@...com>
Subject: Re: [RFC PATCH 11/13] arm64: dts: ti: k3-am62p: Add missing
 properties for MMC

Hi Roger,

On 2/2/24 3:50 AM, Roger Quadros wrote:
> 
> 
> On 31/01/2024 02:37, Judith Mendez wrote:
>> Add missing properties to enable HS200 timing for MMC0 and
>> SDR104 timing for MMC1 according to the datasheet [0] for
>> AM62p device, refer to Table 7-79 for MMC0 and Table 7-97
>> for MMC1/MMC2.
>>
>> [0] https://www.ti.com/lit/ds/symlink/am625.pdf
>>
>> Signed-off-by: Judith Mendez <jm@...com>
>> ---
>>   arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 44 +++++++++++++++++++++--
>>   arch/arm64/boot/dts/ti/k3-am62p5-sk.dts   |  6 ++--
>>   2 files changed, 45 insertions(+), 5 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
>> index 4c51bae06b57..f743700dd5bd 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
>> @@ -534,7 +534,21 @@ sdhci0: mmc@...0000 {
>>   		clock-names = "clk_ahb", "clk_xin";
>>   		assigned-clocks = <&k3_clks 57 2>;
>>   		assigned-clock-parents = <&k3_clks 57 4>;
>> -		ti,otap-del-sel-legacy = <0x0>;
>> +		bus-width = <8>;
>> +		mmc-ddr-1_8v;
>> +		mmc-hs200-1_8v;
>> +		mmc-hs400-1_8v;
>> +		ti,clkbuf-sel = <0x7>;
>> +		ti,strobe-sel = <0x77>;
>> +		ti,trm-icp = <0x8>;
>> +		ti,otap-del-sel-legacy = <0x1>;
>> +		ti,otap-del-sel-mmc-hs = <0x1>;
>> +		ti,otap-del-sel-ddr52 = <0x6>;
>> +		ti,otap-del-sel-hs200 = <0x8>;
>> +		ti,otap-del-sel-hs400 = <0x5>;
>> +		ti,itap-del-sel-legacy = <0x10>;
>> +		ti,itap-del-sel-mmc-hs = <0xa>;
>> +		ti,itap-del-sel-ddr52 = <0x3>;
>>   		status = "disabled";
>>   	};
>>   
>> @@ -545,7 +559,19 @@ sdhci1: mmc@...0000 {
>>   		power-domains = <&k3_pds 58 TI_SCI_PD_EXCLUSIVE>;
>>   		clocks = <&k3_clks 58 5>, <&k3_clks 58 6>;
>>   		clock-names = "clk_ahb", "clk_xin";
>> -		ti,otap-del-sel-legacy = <0x8>;
>> +		bus-width = <4>;
>> +		ti,clkbuf-sel = <0x7>;
>> +		ti,otap-del-sel-legacy = <0x0>;
>> +		ti,otap-del-sel-sd-hs = <0x0>;
>> +		ti,otap-del-sel-sdr12 = <0xf>;
>> +		ti,otap-del-sel-sdr25 = <0xf>;
>> +		ti,otap-del-sel-sdr50 = <0xc>;
>> +		ti,otap-del-sel-ddr50 = <0x9>;
>> +		ti,otap-del-sel-sdr104 = <0x6>;
>> +		ti,itap-del-sel-legacy = <0x0>;
>> +		ti,itap-del-sel-sd-hs = <0x0>;
>> +		ti,itap-del-sel-sdr12 = <0x0>;
>> +		ti,itap-del-sel-sdr25 = <0x0>;
>>   		status = "disabled";
>>   	};
>>   
>> @@ -556,7 +582,19 @@ sdhci2: mmc@...0000 {
>>   		power-domains = <&k3_pds 184 TI_SCI_PD_EXCLUSIVE>;
>>   		clocks = <&k3_clks 184 5>, <&k3_clks 184 6>;
>>   		clock-names = "clk_ahb", "clk_xin";
>> -		ti,otap-del-sel-legacy = <0x8>;
>> +		bus-width = <4>;
>> +		ti,clkbuf-sel = <0x7>;
>> +		ti,otap-del-sel-legacy = <0x0>;
>> +		ti,otap-del-sel-sd-hs = <0x0>;
>> +		ti,otap-del-sel-sdr12 = <0xf>;
>> +		ti,otap-del-sel-sdr25 = <0xf>;
>> +		ti,otap-del-sel-sdr50 = <0xc>;
>> +		ti,otap-del-sel-ddr50 = <0x9>;
>> +		ti,otap-del-sel-sdr104 = <0x6>;
>> +		ti,itap-del-sel-legacy = <0x0>;
>> +		ti,itap-del-sel-sd-hs = <0x0>;
>> +		ti,itap-del-sel-sdr12 = <0x0>;
>> +		ti,itap-del-sel-sdr25 = <0x0>;
>>   		status = "disabled";
>>   	};
>>   
>> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
>> index 1773c05f752c..10156a04a92c 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
>> @@ -410,13 +410,17 @@ &main_i2c2 {
>>   };
>>   
>>   &sdhci0 {
>> +	/* eMMC */
>> +	bootph-all;
>>   	status = "okay";
>> +	non-removable;
>>   	ti,driver-strength-ohm = <50>;
>>   	disable-wp;
>>   };
>>   
>>   &sdhci1 {
>>   	/* SD/MMC */
>> +	bootph-all;
>>   	status = "okay";
>>   	vmmc-supply = <&vdd_mmc1>;
>>   	vqmmc-supply = <&vddshv_sdio>;
>> @@ -424,8 +428,6 @@ &sdhci1 {
>>   	pinctrl-0 = <&main_mmc1_pins_default>;
>>   	ti,driver-strength-ohm = <50>;
>>   	disable-wp;
>> -	no-1-8-v;
> 
> Why was 'no-1-8-v' removed?

To enable HS400 timing, the no-1-8-v property should
be removed. I add this comment in patch description for
v1.

Thanks for reviewing!

~ Judith

> 
>> -	bootph-all;
>>   };
>>   
>>   &cpsw3g {
>