u-boot/arch/arm/dts/ste-dbx5x0-u-boot.dtsi
Stephan Gerhold fc9d4b123d arm: dts: u8500: u-boot: Add fixed clock for eMMC
So far there is no need for a clock driver in U-Boot because the
previous boot stage leaves all the necessary clocks on. However,
some drivers in U-Boot (e.g. arm_pl180_mmci) depend on having a clock
driver to obtain the clock frequency.

Setting up the clock drivers properly is a bit tricky on U8500,
so for now add a simple fixed-clock for the eMMC that allows obtaining
the clock frequency. This should be replaced eventually if some board
actually requires enabling some of the clocks.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
2021-09-01 19:25:37 -04:00

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// SPDX-License-Identifier: GPL-2.0-or-later
#include "skeleton.dtsi"
#include "ste-dbx5x0.dtsi"
/ {
/* FIXME: Remove this when clk driver is implemented */
sdmmcclk: sdmmcclk {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <100000000>;
};
soc {
mtu@a03c6000 {
clock-frequency = <133000000>;
};
uart@80120000 {
clock = <38400000>;
};
uart@80121000 {
clock = <38400000>;
};
uart@80007000 {
clock = <38400000>;
};
mmc@80005000 {
clocks = <&sdmmcclk>;
};
};
reboot {
compatible = "syscon-reboot";
regmap = <&prcmu>;
offset = <0x228>; /* PRCM_APE_SOFTRST */
mask = <0x1>;
};
};