[PATCH v2 1/5] arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization

[PATCH v2 1/5] arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization

[Frank Wunderlich]

From: Eric Woudstra <ericwouds@gmail.com>

Eric reports errors on emmc with hs400 mode when booting linux on bpi-r3
without uboot [1]. Booting with uboot does not show this because clocks
seem to be initialized by uboot.

Fix this by adding assigned-clocks and assigned-clock-parents like it's
done in uboot [2].

[1] https://forum.banana-pi.org/t/bpi-r3-kernel-fails-setting-emmc-clock-to-416m-depends-on-u-boot/15170
[2] https://github.com/u-boot/u-boot/blob/master/arch/arm/dts/mt7986.dtsi#L287

Cc: stable@vger.kernel.org
Fixes: 513b49d19b34 ("arm64: dts: mt7986: add mmc related device nodes")
Signed-off-by: Eric Woudstra <ericwouds@gmail.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt7986a.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
index 24eda00e320d..77ddd9e44ed2 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
@@ -374,6 +374,10 @@ mmc0: mmc@11230000 {
 			reg = <0 0x11230000 0 0x1000>,
 			      <0 0x11c20000 0 0x1000>;
 			interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>;
+			assigned-clocks = <&topckgen CLK_TOP_EMMC_416M_SEL>,
+					  <&topckgen CLK_TOP_EMMC_250M_SEL>;
+			assigned-clock-parents = <&apmixedsys CLK_APMIXED_MPLL>,
+						 <&topckgen CLK_TOP_NET1PLL_D5_D2>;
 			clocks = <&topckgen CLK_TOP_EMMC_416M_SEL>,
 				 <&infracfg CLK_INFRA_MSDC_HCK_CK>,
 				 <&infracfg CLK_INFRA_MSDC_CK>,
-- 
2.34.1

Re: [PATCH v2 1/5] arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization

[AngeloGioacchino Del Regno]

On Wed, 25 Oct 2023 19:08:28 +0200, Frank Wunderlich wrote:
> Eric reports errors on emmc with hs400 mode when booting linux on bpi-r3
> without uboot [1]. Booting with uboot does not show this because clocks
> seem to be initialized by uboot.
> 
> Fix this by adding assigned-clocks and assigned-clock-parents like it's
> done in uboot [2].
> 
> [...]

Applied, thanks!

[1/5] arm64: dts: mt7986: fix emmc hs400 mode without uboot initialization
      (no commit info)

Best regards,
-- 
AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>