[U-Boot] [PATCH V3 21/32] imx8: add dummy clock

[Peng Fan]

This driver is mostly used to avoid build error.
We use uclass clk driver to clk related operations.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 arch/arm/include/asm/arch-imx8/clock.h | 27 +++++++++++++++++++++++++++
 arch/arm/mach-imx/imx8/clock.c         | 21 +++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 arch/arm/include/asm/arch-imx8/clock.h
 create mode 100644 arch/arm/mach-imx/imx8/clock.c

diff --git a/arch/arm/include/asm/arch-imx8/clock.h b/arch/arm/include/asm/arch-imx8/clock.h
new file mode 100644
index 0000000000..bea157171f
--- /dev/null
+++ b/arch/arm/include/asm/arch-imx8/clock.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2018 NXP
+ */
+
+#ifndef __ASM_ARCH_IMX8_CLOCK_H__
+#define __ASM_ARCH_IMX8_CLOCK_H__
+
+/* Mainly for compatible to imx common code. */
+enum mxc_clock {
+	MXC_ARM_CLK = 0,
+	MXC_AHB_CLK,
+	MXC_IPG_CLK,
+	MXC_UART_CLK,
+	MXC_CSPI_CLK,
+	MXC_AXI_CLK,
+	MXC_DDR_CLK,
+	MXC_ESDHC_CLK,
+	MXC_ESDHC2_CLK,
+	MXC_ESDHC3_CLK,
+	MXC_I2C_CLK,
+	MXC_FEC_CLK,
+};
+
+u32 mxc_get_clock(enum mxc_clock clk);
+
+#endif /* __ASM_ARCH_IMX8_CLOCK_H__ */
diff --git a/arch/arm/mach-imx/imx8/clock.c b/arch/arm/mach-imx/imx8/clock.c
new file mode 100644
index 0000000000..d747e1332f
--- /dev/null
+++ b/arch/arm/mach-imx/imx8/clock.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ */
+
+#include <common.h>
+#include <linux/errno.h>
+#include <asm/arch/clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+u32 mxc_get_clock(enum mxc_clock clk)
+{
+	switch (clk) {
+	default:
+		printf("Unsupported mxc_clock %d\n", clk);
+		break;
+	}
+
+	return 0;
+}
-- 
2.14.1