Re: [PATCH] ARM: dts: stm32: Consistently enable internal pull-ups for SD bus

Hi Marek,
On 12/9/20 11:11 AM, Patrick DELAUNAY wrote:
From: Marek Vasut marex@denx.de Sent: vendredi 9 octobre 2020 23:08
The default state of SD bus and clock line is logical HI. SD card IO is open-drain and pulls the bus lines LO. Always enable the SD bus pull ups to guarantee this behavior. Note that on systems with bus voltage level shifter on the SD bus, the pull ups might also be built into the level shifter, however that should have no negative impact.
Signed-off-by: Marek Vasut marex@denx.de Cc: Patrice Chotard patrice.chotard@st.com Cc: Patrick Delaunay patrick.delaunay@st.com
arch/arm/dts/stm32mp15-pinctrl.dtsi | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/arm/dts/stm32mp15-pinctrl.dtsi b/arch/arm/dts/stm32mp15-pinctrl.dtsi index 154832983c..2f8ff44a7a 100644 --- a/arch/arm/dts/stm32mp15-pinctrl.dtsi +++ b/arch/arm/dts/stm32mp15-pinctrl.dtsi @@ -1184,13 +1184,13 @@ <STM32_PINMUX('D', 2, AF12)>; /* SDMMC1_CMD */ slew-rate = <1>; drive-push-pull;
bias-disable;
}; pins2 { pinmux = <STM32_PINMUX('C', 12, AF12)>; /* SDMMC1_CK */ slew-rate = <2>; drive-push-pull;bias-pull-up;
bias-disable;
}; };bias-pull-up;
@@ -1340,13 +1340,13 @@ <STM32_PINMUX('G', 6, AF10)>; /* SDMMC2_CMD */ slew-rate = <1>; drive-push-pull;
bias-disable;
}; pins2 { pinmux = <STM32_PINMUX('E', 3, AF9)>; /* SDMMC2_CK */ slew-rate = <2>; drive-push-pull;bias-pull-up;
bias-disable;
}; };bias-pull-up;
-- 2.28.0
I don't see consensus on this device tree modification in Linux kernel side [1].
And for the DH board the modification is now done in SOM dtsi files after [2].
So can I close this patchset in patchwork ?
And if the modification is accepted in kernel device tree , I will get it with my next device
tree alignment...
[1] https://st-md-mailman.stormreply.com/pipermail/linux-stm32/2020-October/0085...
[2] "ARM: dts: stm32: Enable internal pull-ups for SDMMC1 on DHCOM SoM http://patchwork.ozlabs.org/project/uboot/list/?series=217761"
http://patchwork.ozlabs.org/project/uboot/list/?series=217761&state=*
Regards
Patrick

On 12/9/20 11:22 AM, Patrick DELAUNAY wrote:
Hi,
[...]
@@ -1340,13 +1340,13 @@ <STM32_PINMUX('G', 6, AF10)>; /* SDMMC2_CMD */ slew-rate = <1>; drive-push-pull; - bias-disable; + bias-pull-up; }; pins2 { pinmux = <STM32_PINMUX('E', 3, AF9)>; /* SDMMC2_CK */ slew-rate = <2>; drive-push-pull; - bias-disable; + bias-pull-up; }; }; -- 2.28.0
I don't see consensus on this device tree modification in Linux kernel side [1].
And for the DH board the modification is now done in SOM dtsi files after [2].
So can I close this patchset in patchwork ?
Yes
And if the modification is accepted in kernel device tree , I will get it with my next device
tree alignment...
I plan to realign the DTs after 2021.01 is out too.
participants (2)
-
Marek Vasut
-
Patrick DELAUNAY