diff options
| author | Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org> | 2010-12-20 16:48:58 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-01-03 10:20:23 +0100 |
| commit | 711669e5b80b6f2d88f61ed8a9681f83d8cbd201 (patch) | |
| tree | bfb50f071e2d539e310aeb3767bfbce54267420f /arch | |
| parent | MX51: Add support for usb host 2 (diff) | |
| download | linux-711669e5b80b6f2d88f61ed8a9681f83d8cbd201.tar.xz linux-711669e5b80b6f2d88f61ed8a9681f83d8cbd201.zip | |
mx51: fix usb clock support
Current code doesn't really enable the usb clocks so if they're disabled
when booting linux, the kernel/machine will hang as soon as someone is trying
to read a usb register
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-mx5/clock-mx51-mx53.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c index 9fc65bbc9d77..2f9eae213094 100644 --- a/arch/arm/mach-mx5/clock-mx51-mx53.c +++ b/arch/arm/mach-mx5/clock-mx51-mx53.c @@ -954,6 +954,41 @@ static struct clk usboh3_clk = { .parent = &pll2_sw_clk, .get_rate = clk_usboh3_get_rate, .set_parent = clk_usboh3_set_parent, + .enable = _clk_ccgr_enable, + .disable = _clk_ccgr_disable, + .enable_reg = MXC_CCM_CCGR2, + .enable_shift = MXC_CCM_CCGRx_CG14_OFFSET, +}; + +static struct clk usb_ahb_clk = { + .parent = &ipg_clk, + .enable = _clk_ccgr_enable, + .disable = _clk_ccgr_disable, + .enable_reg = MXC_CCM_CCGR2, + .enable_shift = MXC_CCM_CCGRx_CG13_OFFSET, +}; + +static int clk_usb_phy1_set_parent(struct clk *clk, struct clk *parent) +{ + u32 reg; + + reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL; + + if (parent == &pll3_sw_clk) + reg |= 1 << MXC_CCM_CSCMR1_USB_PHY_CLK_SEL_OFFSET; + + __raw_writel(reg, MXC_CCM_CSCMR1); + + return 0; +} + +static struct clk usb_phy1_clk = { + .parent = &pll3_sw_clk, + .set_parent = clk_usb_phy1_set_parent, + .enable = _clk_ccgr_enable, + .enable_reg = MXC_CCM_CCGR2, + .enable_shift = MXC_CCM_CCGRx_CG0_OFFSET, + .disable = _clk_ccgr_disable, }; /* eCSPI */ @@ -1094,9 +1129,12 @@ static struct clk_lookup mx51_lookups[] = { _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk) _REGISTER_CLOCK("imx-i2c.2", NULL, hsi2c_clk) _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk) - _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", ahb_clk) + _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", usb_ahb_clk) + _REGISTER_CLOCK("mxc-ehci.0", "usb_phy1", usb_phy1_clk) _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk) - _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", ahb_clk) + _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", usb_ahb_clk) + _REGISTER_CLOCK("mxc-ehci.2", "usb", usboh3_clk) + _REGISTER_CLOCK("mxc-ehci.2", "usb_ahb", usb_ahb_clk) _REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk) _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk) _REGISTER_CLOCK("imx-keypad.0", NULL, kpp_clk) @@ -1170,6 +1208,9 @@ int __init mx51_clocks_init(unsigned long ckil, unsigned long osc, mx51_revision(); clk_disable(&iim_clk); + /* move usb_phy_clk to 24MHz */ + clk_set_parent(&usb_phy1_clk, &osc_clk); + /* set the usboh3_clk parent to pll2_sw_clk */ clk_set_parent(&usboh3_clk, &pll2_sw_clk); |