arm64: dts: rockchip: limit clock rate of MMC controllers for RK3328

commit 03e61929c0d227ed3e1c322fc3804216ea298b7e upstream.

150MHz is a fundamental limitation of RK3328 Soc, w/o this limitation,
eMMC, for instance, will run into 200MHz clock rate in HS200 mode, which
makes the RK3328 boards not always boot properly. By adding it in
rk3328.dtsi would also obviate the worry of missing it when adding new
boards.

Fixes: 52e02d377a72 ("arm64: dts: rockchip: add core dtsi file for RK3328 SoCs")
Cc: stable@vger.kernel.org
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Liang Chen <cl@rock-chips.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm64/boot/dts/rockchip/rk3328.dtsi b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
index f6b4b8f0260f68d2a5d5c6c8d067a8e96575eb11..c34daae3c37c2dcb85b2e37e744baceb1409be0d 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3328.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3328.dtsi
@@ -685,6 +685,7 @@
                         <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
                clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
                fifo-depth = <0x100>;
+               max-frequency = <150000000>;
                status = "disabled";
        };
 
@@ -696,6 +697,7 @@
                         <&cru SCLK_SDIO_DRV>, <&cru SCLK_SDIO_SAMPLE>;
                clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
                fifo-depth = <0x100>;
+               max-frequency = <150000000>;
                status = "disabled";
        };
 
@@ -707,6 +709,7 @@
                         <&cru SCLK_EMMC_DRV>, <&cru SCLK_EMMC_SAMPLE>;
                clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
                fifo-depth = <0x100>;
+               max-frequency = <150000000>;
                status = "disabled";
        };