MLK-16198-2 usb: xhci-imx8: Add clock init interface

Introduce a clock init interface for xhci-imx8 to initialize its clocks
in SoC level. Also implement it for i.MX8QM/QXP.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng@nxp.com>

diff --git a/arch/arm/cpu/armv8/imx8/clock.c b/arch/arm/cpu/armv8/imx8/clock.c
index 31dec3c..1df17e2 100644 (file)
--- a/arch/arm/cpu/armv8/imx8/clock.c
+++ b/arch/arm/cpu/armv8/imx8/clock.c
@@ -212,6 +212,32 @@ void enable_usboh3_clk(unsigned char enable)
        return;
 }
 
+void init_clk_usb3(int index)
+{
+       sc_err_t err;
+       sc_ipc_t ipc;
+
+       ipc = gd->arch.ipc_channel_handle;
+
+       err = sc_pm_clock_enable(ipc, SC_R_USB_2, SC_PM_CLK_MISC, true, false);
+       if (err != SC_ERR_NONE)
+               printf("USB3 set clock failed!, line=%d (error = %d)\n",
+                       __LINE__, err);
+
+       err = sc_pm_clock_enable(ipc, SC_R_USB_2, SC_PM_CLK_MST_BUS, true, false);
+       if (err != SC_ERR_NONE)
+               printf("USB3 set clock failed!, line=%d (error = %d)\n",
+                       __LINE__, err);
+
+       err = sc_pm_clock_enable(ipc, SC_R_USB_2, SC_PM_CLK_PER, true, false);
+       if (err != SC_ERR_NONE)
+               printf("USB3 set clock failed!, line=%d (error = %d)\n",
+                       __LINE__, err);
+
+       return;
+}
+
+
 void init_clk_usdhc(u32 index)
 {
 #ifdef CONFIG_IMX8QM

diff --git a/arch/arm/include/asm/arch-imx8/clock.h b/arch/arm/include/asm/arch-imx8/clock.h
index a90b873..0fd6330 100644 (file)
--- a/arch/arm/include/asm/arch-imx8/clock.h
+++ b/arch/arm/include/asm/arch-imx8/clock.h
@@ -33,5 +33,6 @@ int set_clk_qspi(void);
 u32 imx_get_fecclk(void);
 void init_clk_usdhc(u32 index);
 void init_clk_gpmi_nand(void);
+void init_clk_usb3(int index);
 
 #endif /* __ASM_ARCH_CLOCK_H__ */

diff --git a/drivers/usb/host/xhci-imx8.c b/drivers/usb/host/xhci-imx8.c
index 6ce8be5..f09cc54 100644 (file)
--- a/drivers/usb/host/xhci-imx8.c
+++ b/drivers/usb/host/xhci-imx8.c
@@ -16,6 +16,7 @@
 #include <usb/imx8_usb3_reg_def.h>
 #include <dm.h>
 #include <power-domain.h>
+#include <asm/arch/clock.h>
 
 /* Declare global data pointer */
 DECLARE_GLOBAL_DATA_PTR;
@@ -181,6 +182,8 @@ static int xhci_imx8_probe(struct udevice *dev)
                return ret;
        }
 
+       init_clk_usb3(dev->seq);
+
        imx8_xhci_init();
 
        hccr = (struct xhci_hccr *)HCIVERSION_CAPLENGTH;
@@ -228,6 +231,8 @@ int xhci_hcd_init(int index, struct xhci_hccr **ret_hccr,
                return ret;
        }
 
+       init_clk_usb3(index);
+
        imx8_xhci_init();
 
        hccr = (struct xhci_hccr *)HCIVERSION_CAPLENGTH;