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USB: MX5: add helper functions to enable USB clocks

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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
This commit is contained in:
Wolfgang Grandegger 2011-11-11 14:03:34 +01:00 • committed by Remy Bohmer
parent a954da2902
commit 5d2947a3fc
3 changed files with 80 additions and 0 deletions
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72
arch/arm/cpu/armv7/mx5/clock.c
View file

@ -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.
*/

5
arch/arm/include/asm/arch-mx5/clock.h
View file

@ -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 */

3
arch/arm/include/asm/arch-mx5/crm_regs.h
View file

@ -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)