rockchip: rk3288: Allow setting up clocks in U-Boot proper
If U-Boot is chain-loaded from a previous boot loader we must set up the
clocks the way U-Boot wants them. Add code for this. It will do nothing if
SPL has already done the job.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-rockchip/rk3288-board.c b/arch/arm/mach-rockchip/rk3288-board.c
index 18fd0dc..a354d99 100644
--- a/arch/arm/mach-rockchip/rk3288-board.c
+++ b/arch/arm/mach-rockchip/rk3288-board.c
@@ -309,3 +309,38 @@
"display information about clocks",
""
);
+
+#define GRF_SOC_CON2 0xff77024c
+
+int board_early_init_f(void)
+{
+ struct udevice *pinctrl;
+ struct udevice *dev;
+ int ret;
+
+ /*
+ * This init is done in SPL, but when chain-loading U-Boot SPL will
+ * have been skipped. Allow the clock driver to check if it needs
+ * setting up.
+ */
+ ret = rockchip_get_clk(&dev);
+ if (ret) {
+ debug("CLK init failed: %d\n", ret);
+ return ret;
+ }
+ ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
+ if (ret) {
+ debug("%s: Cannot find pinctrl device\n", __func__);
+ return ret;
+ }
+
+ /* Enable debug UART */
+ ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
+ if (ret) {
+ debug("%s: Failed to set up console UART\n", __func__);
+ return ret;
+ }
+ rk_setreg(GRF_SOC_CON2, 1 << 0);
+
+ return 0;
+}