[U-Boot] [PATCH 1/9] USB: MX5: add helper functions to enable USB clocks

Marek Vasut
2011-12-07T18:33:10Z

From: Wolfgang Grandegger <wg@denx.de>

Signed-off-by: Wolfgang Grandegger <wg@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Remy Bohmer <linux@bohmer.net>
Cc: Wolfgang Grandegger <wg@denx.de>
Cc: Jason Liu <r64343@freescale.com>

V2: Fix spacing in crm_regs.h
---
arch/arm/cpu/armv7/mx5/clock.c | 72 ++++++++++++++++++++++++++++++
arch/arm/include/asm/arch-mx5/clock.h | 5 ++
arch/arm/include/asm/arch-mx5/crm_regs.h | 3 +
3 files changed, 80 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c
index 0769a64..c8dad17 100644
--- a/arch/arm/cpu/armv7/mx5/clock.c
+++ b/arch/arm/cpu/armv7/mx5/clock.c
@@ -50,6 +50,78 @@ struct mxc_pll_reg *mxc_plls[PLL_CLOCKS] = {

struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)MXC_CCM_BASE;

+void set_usboh3_clk(void)
+{
+ unsigned int reg;
+
+ reg = readl(&mxc_ccm->cscmr1) &
+ ~MXC_CCM_CSCMR1_USBOH3_CLK_SEL_MASK;
+ reg |= 1 << MXC_CCM_CSCMR1_USBOH3_CLK_SEL_OFFSET;
+ writel(reg, &mxc_ccm->cscmr1);
+
+ reg = readl(&mxc_ccm->cscdr1);
+ reg &= ~MXC_CCM_CSCDR1_USBOH3_CLK_PODF_MASK;
+ reg &= ~MXC_CCM_CSCDR1_USBOH3_CLK_PRED_MASK;
+ reg |= 4 << MXC_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET;
+ reg |= 1 << MXC_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET;
+
+ writel(reg, &mxc_ccm->cscdr1);
+}
+
+void enable_usboh3_clk(unsigned char enable)
+{
+ unsigned int reg;
+
+ reg = readl(&mxc_ccm->CCGR2);
+ if (enable)
+ reg |= 1 << MXC_CCM_CCGR2_CG14_OFFSET;
+ else
+ reg &= ~(1 << MXC_CCM_CCGR2_CG14_OFFSET);
+ writel(reg, &mxc_ccm->CCGR2);
+}
+
+void set_usb_phy1_clk(void)
+{
+ unsigned int reg;
+
+ reg = readl(&mxc_ccm->cscmr1);
+ reg &= ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL;
+ writel(reg, &mxc_ccm->cscmr1);
+}
+
+void enable_usb_phy1_clk(unsigned char enable)
+{
+ unsigned int reg;
+
+ reg = readl(&mxc_ccm->CCGR4);
+ if (enable)
+ reg |= 1 << MXC_CCM_CCGR4_CG5_OFFSET;
+ else
+ reg &= ~(1 << MXC_CCM_CCGR4_CG5_OFFSET);
+ writel(reg, &mxc_ccm->CCGR4);
+}
+
+void set_usb_phy2_clk(void)
+{
+ unsigned int reg;
+
+ reg = readl(&mxc_ccm->cscmr1);
+ reg &= ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL;
+ writel(reg, &mxc_ccm->cscmr1);
+}
+
+void enable_usb_phy2_clk(unsigned char enable)
+{
+ unsigned int reg;
+
+ reg = readl(&mxc_ccm->CCGR4);
+ if (enable)
+ reg |= 1 << MXC_CCM_CCGR4_CG6_OFFSET;
+ else
+ reg &= ~(1 << MXC_CCM_CCGR4_CG6_OFFSET);
+ writel(reg, &mxc_ccm->CCGR4);
+}
+
/*
* Calculate the frequency of PLLn.
*/
diff --git a/arch/arm/include/asm/arch-mx5/clock.h b/arch/arm/include/asm/arch-mx5/clock.h
index 1f8a537..ea972a3 100644
--- a/arch/arm/include/asm/arch-mx5/clock.h
+++ b/arch/arm/include/asm/arch-mx5/clock.h
@@ -40,4 +40,9 @@ u32 imx_get_uartclk(void);
u32 imx_get_fecclk(void);
unsigned int mxc_get_clock(enum mxc_clock clk);

+void set_usb_phy2_clk(void);
+void enable_usb_phy2_clk(unsigned char enable);
+void set_usboh3_clk(void);
+void enable_usboh3_clk(unsigned char enable);
+
#endif /* __ASM_ARCH_CLOCK_H */
diff --git a/arch/arm/include/asm/arch-mx5/crm_regs.h b/arch/arm/include/asm/arch-mx5/crm_regs.h
index fcc0e36..bdeafbc 100644
--- a/arch/arm/include/asm/arch-mx5/crm_regs.h
+++ b/arch/arm/include/asm/arch-mx5/crm_regs.h
@@ -195,7 +195,10 @@ struct mxc_ccm_reg {
/* Define the bits in register CCGRx */
#define MXC_CCM_CCGR_CG_MASK 0x3

+#define MXC_CCM_CCGR4_CG5_OFFSET 10
+#define MXC_CCM_CCGR4_CG6_OFFSET 12
#define MXC_CCM_CCGR5_CG5_OFFSET 10
+#define MXC_CCM_CCGR2_CG14_OFFSET 28

/* Define the bits in register CLPCR */
#define MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS (0x1 << 18)
--
1.7.7.1