arm64: dts: renesas: r8a779f0: Set UFS lane count

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Since commit e72323f3b0 ("scsi: ufs: core: Configure only active lanes
during link"), the following error is observed on R-Car S4:

    ufshcd-renesas e6860000.ufs: Tx lane mismatch [config,reported] [2,1]
    ufshcd-renesas e6860000.ufs: link startup failed -67
    ufshcd-renesas e6860000.ufs: error -ENOLINK: Initialization failed with error -67
    ufshcd-renesas e6860000.ufs: probe with driver ufshcd-renesas failed with error -67

R-Car S4 has one UFS lane per direction, as described in section 152.1
of its hardware manual.  Without lanes-per-direction, the UFS platform
driver defaults to two lanes.

Previously, the core used PA_CONNECTEDRXDATALANES and
PA_CONNECTEDTXDATALANES to configure the link without checking them
against lanes-per-direction, so the missing property did not prevent
initialization.

Explicitly set lanes-per-direction to 1, now that the validation is in
place.

Fixes: 5235d55177 ("arm64: dts: renesas: r8a779f0: Add UFS node")
Cc: stable@vger.kernel.org # 7.2+
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260911073058.253000-1-den@valinux.co.jp
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

...

This commit is contained in:

Koichiro Den 2026-09-11 16:30:58 +09:00 • committed by Geert Uytterhoeven

parent 2ac7bad110

commit 8dc2615d57

1 changed files with 1 additions and 0 deletions

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