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powerpc/mpc85xx: Add Differential SYSCLK config support T1040

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Adds support for clock sourcing from sysclk(100MHz) for usb
on T104xRDB and T1040QDS. This requires changing reference divisor
and multiplication factor to derive usb clock from sysclk.

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Nikhil Badola 2014-04-15 14:44:52 +05:30 committed by York Sun
parent 0c12a1592c
commit d1c561cd54
2 changed files with 31 additions and 0 deletions
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26
arch/powerpc/cpu/mpc85xx/cpu_init.c
View File

@ -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,

5
include/fsl_usb.h
View File

@ -48,6 +48,11 @@ struct ccsr_usb_phy {
#define CONFIG_SYS_FSL_USB_PLLPRG2_PHY2_CLK_EN (1 << 0)
#define CONFIG_SYS_FSL_USB_PLLPRG2_PHY1_CLK_EN (1 << 1)
#define CONFIG_SYS_FSL_USB_PLLPRG2_FRAC_LPF_EN (1 << 13)
#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK
#define CONFIG_SYS_FSL_USB_PLLPRG2_REF_DIV_INTERNAL_CLK (5 << 4)
#define CONFIG_SYS_FSL_USB_PLLPRG2_MFI_INTERNAL_CLK (6 << 16)
#define CONFIG_SYS_FSL_USB_INTERNAL_SOC_CLK_EN (1 << 20)
#endif
#define CONFIG_SYS_FSL_USB_PLLPRG2_REF_DIV (1 << 4)
#define CONFIG_SYS_FSL_USB_PLLPRG2_MFI (5 << 16)
#define CONFIG_SYS_FSL_USB_PLLPRG2_PLL_EN (1 << 21)