diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index a2b79cc..36ef232 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -39,6 +39,29 @@ DECLARE_GLOBAL_DATA_PTR; +#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK +/* + * For deriving usb clock from 100MHz sysclk, reference divisor is set + * to a value of 5, which gives an intermediate value 20(100/5). The + * multiplication factor integer is set to 24, which when multiplied to + * above intermediate value provides clock for usb ip. + */ +void usb_single_source_clk_configure(struct ccsr_usb_phy *usb_phy) +{ + sys_info_t sysinfo; + + get_sys_info(&sysinfo); + if (sysinfo.diff_sysclk == 1) { + clrbits_be32(&usb_phy->pllprg[1], + CONFIG_SYS_FSL_USB_PLLPRG2_MFI); + setbits_be32(&usb_phy->pllprg[1], + CONFIG_SYS_FSL_USB_PLLPRG2_REF_DIV_INTERNAL_CLK | + CONFIG_SYS_FSL_USB_PLLPRG2_MFI_INTERNAL_CLK | + CONFIG_SYS_FSL_USB_INTERNAL_SOC_CLK_EN); + } +} +#endif + #ifdef CONFIG_SYS_FSL_ERRATUM_A006261 void fsl_erratum_a006261_workaround(struct ccsr_usb_phy __iomem *usb_phy) { @@ -815,6 +838,9 @@ skip_l2: CONFIG_SYS_FSL_USB_PLLPRG2_PHY1_CLK_EN | CONFIG_SYS_FSL_USB_PLLPRG2_MFI | CONFIG_SYS_FSL_USB_PLLPRG2_PLL_EN); +#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK + usb_single_source_clk_configure(usb_phy); +#endif setbits_be32(&usb_phy->port1.ctrl, CONFIG_SYS_FSL_USB_CTRL_PHY_EN); setbits_be32(&usb_phy->port1.drvvbuscfg, |