[U-Boot] [PATCH 2/4] rockchip: Add a way to obtain the main clock device

[Simon Glass]

On Rockchip SoCs we typically have a main clock device that uses the Soc
clock driver. There is also a fixed clock for the oscillator. Add a function
to obtain the core clock.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 arch/arm/include/asm/arch-rockchip/clock.h |  2 ++
 arch/arm/mach-rockchip/rk3288/Makefile     |  1 +
 arch/arm/mach-rockchip/rk3288/clk_rk3288.c | 17 +++++++++++++++++
 3 files changed, 20 insertions(+)
 create mode 100644 arch/arm/mach-rockchip/rk3288/clk_rk3288.c

diff --git a/arch/arm/include/asm/arch-rockchip/clock.h b/arch/arm/include/asm/arch-rockchip/clock.h
index 317e512..99cc18c 100644
--- a/arch/arm/include/asm/arch-rockchip/clock.h
+++ b/arch/arm/include/asm/arch-rockchip/clock.h
@@ -67,4 +67,6 @@ struct rk3288_grf;
 
 void rkclk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf);
 
+int rockchip_get_clk(struct udevice **devp);
+
 #endif
diff --git a/arch/arm/mach-rockchip/rk3288/Makefile b/arch/arm/mach-rockchip/rk3288/Makefile
index 6f62375..82b00a1 100644
--- a/arch/arm/mach-rockchip/rk3288/Makefile
+++ b/arch/arm/mach-rockchip/rk3288/Makefile
@@ -4,6 +4,7 @@
 # SPDX-License-Identifier:      GPL-2.0+
 #
 
+obj-y += clk_rk3288.o
 obj-y += reset_rk3288.o
 obj-y += sdram_rk3288.o
 obj-y += syscon_rk3288.o
diff --git a/arch/arm/mach-rockchip/rk3288/clk_rk3288.c b/arch/arm/mach-rockchip/rk3288/clk_rk3288.c
new file mode 100644
index 0000000..2099e34
--- /dev/null
+++ b/arch/arm/mach-rockchip/rk3288/clk_rk3288.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg at chromium.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <syscon.h>
+#include <asm/arch/clock.h>
+
+int rockchip_get_clk(struct udevice **devp)
+{
+	return uclass_get_device_by_driver(UCLASS_CLK,
+			DM_GET_DRIVER(rockchip_rk3288_cru), devp);
+}
-- 
2.8.0.rc3.226.g39d4020