USB: MX5: add helper functions to enable USB clocks

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

@@ -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.
  */

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 */

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)