OMAP3+: Clock: Adding ehci clock enabling

Adding ehci clock enabling mechanism part of clock framework.
When essential clocks are enabled during init phase usb host
clocks can also be enabled from clock framework.

Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Tested-by: Stefano Babic <sbabic@denx.de>

diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c
index 871aa37df8d4d6de7d935d42cc02135b10dc4775..054e9c481cee5030fe20b34ebcb6c835fd81dda0 100644 (file)
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -228,6 +228,10 @@ void s_init(void)
 
        per_clocks_enable();
 
+#ifdef CONFIG_USB_EHCI_OMAP
+       ehci_clocks_enable();
+#endif
+
 #ifdef CONFIG_SPL_BUILD
        preloader_console_init();
 

diff --git a/arch/arm/cpu/armv7/omap3/clock.c b/arch/arm/cpu/armv7/omap3/clock.c
index e0d65c7a4abca53006f58ca679fa6e657f82579e..567817e0ec3b062c3ee2a66c901b14ab1b44a8b2 100644 (file)
--- a/arch/arm/cpu/armv7/omap3/clock.c
+++ b/arch/arm/cpu/armv7/omap3/clock.c
@@ -626,6 +626,26 @@ void prcm_init(void)
        sdelay(5000);
 }
 
+/*
+ * Enable usb ehci uhh, tll clocks
+ */
+void ehci_clocks_enable(void)
+{
+       struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+
+       /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
+       sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
+       /*
+        * Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
+        * and USBHOST_120M_FCLK (USBHOST_FCLK2)
+        */
+       sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
+       /* Enable USBTTL_ICLK */
+       sr32(&prcm_base->iclken3_core, 2, 1, 1);
+       /* Enable USBTTL_FCLK */
+       sr32(&prcm_base->fclken3_core, 2, 1, 1);
+}
+
 /******************************************************************************
  * peripheral_enable() - Enable the clks & power for perifs (GPT2, UART1,...)
  *****************************************************************************/

diff --git a/arch/arm/cpu/armv7/omap4/clocks.c b/arch/arm/cpu/armv7/omap4/clocks.c
index 0886f92431ad87ace2cd2823196580b8cd3693e7..12e283af767b2d53ecb936d92065a5d26f5ad993 100644 (file)
--- a/arch/arm/cpu/armv7/omap4/clocks.c
+++ b/arch/arm/cpu/armv7/omap4/clocks.c
@@ -342,6 +342,9 @@ void enable_basic_clocks(void)
                &prcm->cm_l4per_gpio4_clkctrl,
                &prcm->cm_l4per_gpio5_clkctrl,
                &prcm->cm_l4per_gpio6_clkctrl,
+               &prcm->cm_l3init_usbphy_clkctrl,
+               &prcm->cm_clksel_usb_60mhz,
+               &prcm->cm_l3init_hsusbtll_clkctrl,
                0
        };
 
@@ -352,6 +355,8 @@ void enable_basic_clocks(void)
                &prcm->cm_l4per_gptimer2_clkctrl,
                &prcm->cm_wkup_wdtimer2_clkctrl,
                &prcm->cm_l4per_uart3_clkctrl,
+               &prcm->cm_l3init_fsusb_clkctrl,
+               &prcm->cm_l3init_hsusbhost_clkctrl,
                0
        };
 

diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index e5031d5022ba3f07d919278c68166bf7e9f31ec1..2a89e56534073ff7d65a63e9d89e4e866e88266f 100644 (file)
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -34,6 +34,7 @@ struct emu_hal_params {
 
 void prcm_init(void);
 void per_clocks_enable(void);
+void ehci_clocks_enable(void);
 
 void memif_init(void);
 void sdrc_init(void);