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ARM: LPC32xx: Cleanup USB clock init 

Move most of usb clock initialization from lpc32xx_udc and ohci-nxp to
clock.c. Also adds ohci clocks and otg clocks.

Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Roland Stigge <stigge@antcom.de>
hifive-unleashed-5.1
Alexandre Pereira da Silva 2012-07-01 21:06:45 +02:00 committed by Roland Stigge
parent a0a30b6a69
commit a408e8f423
2 changed files with 81 additions and 1 deletions
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68
arch/arm/mach-lpc32xx/clock.c
View File

@ -739,14 +739,77 @@ static struct clk clk_rtc = {
.get_rate = local_return_parent_rate,
};
static int local_usb_enable(struct clk *clk, int enable)
{
u32 tmp;
if (enable) {
/* Set up I2C pull levels */
tmp = __raw_readl(LPC32XX_CLKPWR_I2C_CLK_CTRL);
tmp |= LPC32XX_CLKPWR_I2CCLK_USBI2CHI_DRIVE;
__raw_writel(tmp, LPC32XX_CLKPWR_I2C_CLK_CTRL);
}
return local_onoff_enable(clk, enable);
}
static struct clk clk_usbd = {
.parent = &clk_usbpll,
.enable = local_onoff_enable,
.enable = local_usb_enable,
.enable_reg = LPC32XX_CLKPWR_USB_CTRL,
.enable_mask = LPC32XX_CLKPWR_USBCTRL_HCLK_EN,
.get_rate = local_return_parent_rate,
};
#define OTG_ALWAYS_MASK (LPC32XX_USB_OTG_OTG_CLOCK_ON | \
LPC32XX_USB_OTG_I2C_CLOCK_ON)
static int local_usb_otg_enable(struct clk *clk, int enable)
{
int to = 1000;
if (enable) {
__raw_writel(clk->enable_mask, clk->enable_reg);
while (((__raw_readl(LPC32XX_USB_OTG_CLK_STAT) &
clk->enable_mask) != clk->enable_mask) && (to > 0))
to--;
} else {
__raw_writel(OTG_ALWAYS_MASK, clk->enable_reg);
while (((__raw_readl(LPC32XX_USB_OTG_CLK_STAT) &
OTG_ALWAYS_MASK) != OTG_ALWAYS_MASK) && (to > 0))
to--;
}
if (to)
return 0;
else
return -1;
}
static struct clk clk_usb_otg_dev = {
.parent = &clk_usbpll,
.enable = local_usb_otg_enable,
.enable_reg = LPC32XX_USB_OTG_CLK_CTRL,
.enable_mask = LPC32XX_USB_OTG_AHB_M_CLOCK_ON |
LPC32XX_USB_OTG_OTG_CLOCK_ON |
LPC32XX_USB_OTG_DEV_CLOCK_ON |
LPC32XX_USB_OTG_I2C_CLOCK_ON,
.get_rate = local_return_parent_rate,
};
static struct clk clk_usb_otg_host = {
.parent = &clk_usbpll,
.enable = local_usb_otg_enable,
.enable_reg = LPC32XX_USB_OTG_CLK_CTRL,
.enable_mask = LPC32XX_USB_OTG_AHB_M_CLOCK_ON |
LPC32XX_USB_OTG_OTG_CLOCK_ON |
LPC32XX_USB_OTG_HOST_CLOCK_ON |
LPC32XX_USB_OTG_I2C_CLOCK_ON,
.get_rate = local_return_parent_rate,
};
static int tsc_onoff_enable(struct clk *clk, int enable)
{
u32 tmp;
@ -1145,6 +1208,9 @@ static struct clk_lookup lookups[] = {
CLKDEV_INIT("31060000.ethernet", NULL, &clk_net),
CLKDEV_INIT("dev:clcd", NULL, &clk_lcd),
CLKDEV_INIT("31020000.usbd", "ck_usbd", &clk_usbd),
CLKDEV_INIT("31020000.ohci", "ck_usbd", &clk_usbd),
CLKDEV_INIT("31020000.usbd", "ck_usb_otg", &clk_usb_otg_dev),
CLKDEV_INIT("31020000.ohci", "ck_usb_otg", &clk_usb_otg_host),
CLKDEV_INIT("lpc32xx_rtc", NULL, &clk_rtc),
};

14
arch/arm/mach-lpc32xx/include/mach/platform.h
View File

@ -694,4 +694,18 @@
#define LPC32XX_GPIO_P2_MUX_CLR _GPREG(0x02C)
#define LPC32XX_GPIO_P2_MUX_STATE _GPREG(0x030)
/*
* USB Otg Registers
*/
#define _OTGREG(x) io_p2v(LPC32XX_USB_OTG_BASE + (x))
#define LPC32XX_USB_OTG_CLK_CTRL _OTGREG(0xFF4)
#define LPC32XX_USB_OTG_CLK_STAT _OTGREG(0xFF8)
/* USB OTG CLK CTRL bit defines */
#define LPC32XX_USB_OTG_AHB_M_CLOCK_ON _BIT(4)
#define LPC32XX_USB_OTG_OTG_CLOCK_ON _BIT(3)
#define LPC32XX_USB_OTG_I2C_CLOCK_ON _BIT(2)
#define LPC32XX_USB_OTG_DEV_CLOCK_ON _BIT(1)
#define LPC32XX_USB_OTG_HOST_CLOCK_ON _BIT(0)
#endif