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ARM: AM43xx: Add functions to enable and disable USB clocks 

Added functions to enable and disable USB clocks which can be invoked
during USB init and USB exit respectively.

Cc: Roger Quadros <rogerq@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Nishanth Menon <nm@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Kishon Vijay Abraham I 2015-08-19 16:16:26 +05:30 committed by Tom Rini
parent ca5a0f172e
commit 09cc14f4bc
2 changed files with 73 additions and 0 deletions
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70
arch/arm/cpu/armv7/am33xx/clock_am43xx.c
View File

@ -171,3 +171,73 @@ void disable_edma3_clocks(void)
1); 1);
} }
#endif #endif
#ifdef CONFIG_USB_DWC3
void enable_usb_clocks(int index)
{
u32 *usbclkctrl = 0;
u32 *usbphyocp2scpclkctrl = 0;
if (index == 0) {
usbclkctrl = &cmper->usb0clkctrl;
usbphyocp2scpclkctrl = &cmper->usbphyocp2scp0clkctrl;
setbits_le32(&cmper->usb0clkctrl,
USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
setbits_le32(&cmwkup->usbphy0clkctrl,
USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
} else if (index == 1) {
usbclkctrl = &cmper->usb1clkctrl;
usbphyocp2scpclkctrl = &cmper->usbphyocp2scp1clkctrl;
setbits_le32(&cmper->usb1clkctrl,
USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
setbits_le32(&cmwkup->usbphy1clkctrl,
USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
}
u32 *const clk_domains_usb[] = {
0
};
u32 *const clk_modules_explicit_en_usb[] = {
usbclkctrl,
usbphyocp2scpclkctrl,
0
};
do_enable_clocks(clk_domains_usb, clk_modules_explicit_en_usb, 1);
}
void disable_usb_clocks(int index)
{
u32 *usbclkctrl = 0;
u32 *usbphyocp2scpclkctrl = 0;
if (index == 0) {
usbclkctrl = &cmper->usb0clkctrl;
usbphyocp2scpclkctrl = &cmper->usbphyocp2scp0clkctrl;
clrbits_le32(&cmper->usb0clkctrl,
USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
clrbits_le32(&cmwkup->usbphy0clkctrl,
USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
} else if (index == 1) {
usbclkctrl = &cmper->usb1clkctrl;
usbphyocp2scpclkctrl = &cmper->usbphyocp2scp1clkctrl;
clrbits_le32(&cmper->usb1clkctrl,
USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
clrbits_le32(&cmwkup->usbphy1clkctrl,
USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
}
u32 *const clk_domains_usb[] = {
0
};
u32 *const clk_modules_disable_usb[] = {
usbclkctrl,
usbphyocp2scpclkctrl,
0
};
do_disable_clocks(clk_domains_usb, clk_modules_disable_usb, 1);
}
#endif

3
arch/arm/include/asm/arch-am33xx/sys_proto.h
View File

@ -42,3 +42,6 @@ void am33xx_spl_board_init(void);
int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev); int am335x_get_efuse_mpu_max_freq(struct ctrl_dev *cdev);
int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency); int am335x_get_tps65910_mpu_vdd(int sil_rev, int frequency);
#endif #endif
void enable_usb_clocks(int index);
void disable_usb_clocks(int index);