[PATCH 2/8] clock_imx8mm: Add enable_usboh3_clk() for i.MX8M

[Fabio Estevam <festevam@denx.de>]

From: Frieder Schrempf <frieder.schrempf@kontron.de>

Currently we can't use DM_USB in SPL as the ci_udc driver is not
ported to DM yet.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Fabio Estevam <festevam@denx.de>
---
 arch/arm/include/asm/arch-imx8m/clock.h |  1 +
 arch/arm/mach-imx/imx8m/clock_imx8mm.c  | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/arch/arm/include/asm/arch-imx8m/clock.h b/arch/arm/include/asm/arch-imx8m/clock.h
index 77d9428a188a..fcd111c918fd 100644
--- a/arch/arm/include/asm/arch-imx8m/clock.h
+++ b/arch/arm/include/asm/arch-imx8m/clock.h
@@ -276,3 +276,4 @@ int enable_i2c_clk(unsigned char enable, unsigned int i2c_num);
 int set_clk_enet(enum enet_freq type);
 int set_clk_eqos(enum enet_freq type);
 void hab_caam_clock_enable(unsigned char enable);
+void enable_usboh3_clk(unsigned char enable);
diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mm.c b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
index f8e4ec0d9052..dd40e2f1e772 100644
--- a/arch/arm/mach-imx/imx8m/clock_imx8mm.c
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
@@ -277,6 +277,22 @@ int intpll_configure(enum pll_clocks pll, ulong freq)
 	return 0;
 }
 
+void enable_usboh3_clk(unsigned char enable)
+{
+	if (enable) {
+		clock_enable(CCGR_USB_MSCALE_PL301, 0);
+		/* 500M */
+		clock_set_target_val(USB_BUS_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(1));
+		/* 100M */
+		clock_set_target_val(USB_CORE_REF_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(1));
+		/* 100M */
+		clock_set_target_val(USB_PHY_REF_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(1));
+		clock_enable(CCGR_USB_MSCALE_PL301, 1);
+	} else {
+		clock_enable(CCGR_USB_MSCALE_PL301, 0);
+	}
+}
+
 void init_uart_clk(u32 index)
 {
 	/*
-- 
2.25.1