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arm: imx8mq: Add USB clock init function

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Add clock function to setup relevant clocks for USB3.0 controllers and
PHYs on i.MX8MQ

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Patrick Wildt <patrick@blueri.se>
Tested-by: Patrick Wildt <patrick@blueri.se>
This commit is contained in:
Ye Li 2021-02-21 08:26:23 -08:00 committed by Stefano Babic
parent 4390e9f997
commit 4a837d433c
2 changed files with 23 additions and 0 deletions
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1
arch/arm/include/asm/arch-imx8m/clock.h
View File

@ -257,6 +257,7 @@ u32 imx_get_uartclk(void);
int clock_init(void); int clock_init(void);
void init_clk_usdhc(u32 index); void init_clk_usdhc(u32 index);
void init_uart_clk(u32 index); void init_uart_clk(u32 index);
void init_usb_clk(void);
void init_wdog_clk(void); void init_wdog_clk(void);
unsigned int mxc_get_clock(enum mxc_clock clk); unsigned int mxc_get_clock(enum mxc_clock clk);
int clock_enable(enum clk_ccgr_index index, bool enable); int clock_enable(enum clk_ccgr_index index, bool enable);

22
arch/arm/mach-imx/imx8m/clock_imx8mq.c
View File

@ -400,6 +400,28 @@ void init_wdog_clk(void)
clock_enable(CCGR_WDOG3, 1); clock_enable(CCGR_WDOG3, 1);
} }
void init_usb_clk(void)
{
if (!is_usb_boot()) {
clock_enable(CCGR_USB_CTRL1, 0);
clock_enable(CCGR_USB_CTRL2, 0);
clock_enable(CCGR_USB_PHY1, 0);
clock_enable(CCGR_USB_PHY2, 0);
/* 500MHz */
clock_set_target_val(USB_BUS_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
/* 100MHz */
clock_set_target_val(USB_CORE_REF_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
/* 100MHz */
clock_set_target_val(USB_PHY_REF_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
clock_enable(CCGR_USB_CTRL1, 1);
clock_enable(CCGR_USB_CTRL2, 1);
clock_enable(CCGR_USB_PHY1, 1);
clock_enable(CCGR_USB_PHY2, 1);
}
}
void init_nand_clk(void) void init_nand_clk(void)
{ {