From 17110cbbef701b56136aabaaab5652b9ea4618a0 Mon Sep 17 00:00:00 2001 From: Dmitry Osipenko Date: Sun, 23 Aug 2020 17:47:25 +0300 Subject: [PATCH] ARM: tegra: nexus7: Use PLLC for WiFi MMC clock parent The default parent for all MMCs is PLLP, which is running at 408 MHz on Tegra30 and 50 MHz clock can't be derived from PLLP. The maximum SDIO clock rate is 50 MHz, but this rate isn't achievable using PLLP. Let's switch the WiFi MMC clock parent to PLLC in order to get true 50 MHz. This patch doesn't fix any problems, it's just a minor improvement. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding --- arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi index 9999e1afd4654..bca77ee33c74e 100644 --- a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi +++ b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi @@ -945,6 +945,11 @@ #address-cells = <1>; #size-cells = <0>; + assigned-clocks = <&tegra_car TEGRA30_CLK_SDMMC3>; + assigned-clock-parents = <&tegra_car TEGRA30_CLK_PLL_C>; + assigned-clock-rates = <50000000>; + + max-frequency = <50000000>; keep-power-in-suspend; bus-width = <4>; non-removable; -- 2.30.2