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| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2022-10-31 23:17:14 +0100 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2022-11-03 08:07:32 +0100 |
| commit | 61f0cd13df89bc594b9186b1355f6089eb7c5bf1 (patch) | |
| tree | 2e11cb6f732224baef7635932b64354e62da57b3 | |
| parent | 01510c883391951b76e791f01b31dde5b1d247c4 (diff) | |
arm64: dts: imx8mm-verdin: fix sdio wifi instability
Fix SDIO Wi-Fi instability by adding fsl,sdio-async-interrupt-enabled
device tree property to the usdhc3 instance connected to the on-module
AW-CM276NF Wi-Fi.
From Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml:
Recommend for SDIO cards that enables SDIO async interrupt for SDR104
and SDR50 operating modes. SDIO async interrupt uses DAT[1] to signal
the card's interrupt. uSDHC tuning mechanism must use DAT[0] and CMD
signals to avoid a possible conflict and incorrect delay line calculated
by the uSDHC auto tuning mechanism. Enabling this device tree property
is only recommended for layouts that are matching the SD interface
length.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Upstream-status: Inappropriate [NXP downstream SDIO stack]
| -rw-r--r-- | arch/arm64/boot/dts/freescale/imx8mm-verdin-wifi.dtsi | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin-wifi.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin-wifi.dtsi index 017db9eab256..51da18e8d221 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin-wifi.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin-wifi.dtsi @@ -83,6 +83,7 @@ /* On-module Wi-Fi */ &usdhc3 { bus-width = <4>; + fsl,sdio-async-interrupt-enabled; keep-power-in-suspend; non-removable; pinctrl-names = "default", "state_100mhz", "state_200mhz"; |