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| author | Naumann Andreas <ANaumann@ultratronik.de> | 2013-07-09 09:43:17 +0200 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-08-15 09:09:29 -0400 |
| commit | a704a6d615179a25f556c99d31cbc4ee366ffb54 (patch) | |
| tree | f3711d3ae6ca2da11162de7b10b93c8efec43602 /arch/arm/include/asm/arch-omap3 | |
| parent | 802b3c7c1826018530acc8a7b8fe83f11614c937 (diff) | |
| download | talos-obmc-uboot-a704a6d615179a25f556c99d31cbc4ee366ffb54.tar.gz talos-obmc-uboot-a704a6d615179a25f556c99d31cbc4ee366ffb54.zip | |
ARM: omap3: Implement dpll5 (HSUSB clk) workaround for OMAP36xx/AM/DM37xx according to errata sprz318e.
In chapter 'Advisory 2.1 USB Host Clock Drift Causes USB Spec Non-compliance in Certain Configurations' of the TI Errata it is recommended to use certain div/mult values for the DPLL5 clock setup.
So far u-boot used the old 34xx values, so I added the errata recommended values specificly for 36xx init only.
Also, the FSEL registers exist no longer, so removed them from init.
Tested this on a AM3703 board with 19.2MHz oscillator, which previously couldnt lock the dpll5 (kernel complained). As a consequence the EHCI USB port wasnt usable in U-Boot and kernel. With this patch, kernel panics disappear and USB working fine in u-boot and kernel.
Signed-off-by: Andreas Naumann <anaumann@ultratronik.de>
[trini: Add extern to <asm/arch-omap3/clock.h>
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/arm/include/asm/arch-omap3')
| -rw-r--r-- | arch/arm/include/asm/arch-omap3/clock.h | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-omap3/clocks_omap3.h | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-omap3/clock.h b/arch/arm/include/asm/arch-omap3/clock.h index da776cf5b8..514839c778 100644 --- a/arch/arm/include/asm/arch-omap3/clock.h +++ b/arch/arm/include/asm/arch-omap3/clock.h @@ -61,6 +61,7 @@ extern dpll_param *get_36x_mpu_dpll_param(void); extern dpll_param *get_36x_iva_dpll_param(void); extern dpll_param *get_36x_core_dpll_param(void); extern dpll_param *get_36x_per_dpll_param(void); +extern dpll_param *get_36x_per2_dpll_param(void); extern void *_end_vect, *_start; diff --git a/arch/arm/include/asm/arch-omap3/clocks_omap3.h b/arch/arm/include/asm/arch-omap3/clocks_omap3.h index bf7fa00206..df73c4b2eb 100644 --- a/arch/arm/include/asm/arch-omap3/clocks_omap3.h +++ b/arch/arm/include/asm/arch-omap3/clocks_omap3.h @@ -323,4 +323,26 @@ #define PER_36XX_FSEL_38P4 0x07 #define PER_36XX_M2_38P4 0x09 +/* 36XX PER2 DPLL */ + +#define PER2_36XX_M_12 0x50 +#define PER2_36XX_N_12 0x00 +#define PER2_36XX_M2_12 0x08 + +#define PER2_36XX_M_13 0x1BB +#define PER2_36XX_N_13 0x05 +#define PER2_36XX_M2_13 0x08 + +#define PER2_36XX_M_19P2 0x32 +#define PER2_36XX_N_19P2 0x00 +#define PER2_36XX_M2_19P2 0x08 + +#define PER2_36XX_M_26 0x1BB +#define PER2_36XX_N_26 0x0B +#define PER2_36XX_M2_26 0x08 + +#define PER2_36XX_M_38P4 0x19 +#define PER2_36XX_N_38P4 0x00 +#define PER2_36XX_M2_38P4 0x08 + #endif /* endif _CLOCKS_OMAP3_H_ */ |
