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authorNaumann Andreas <ANaumann@ultratronik.de>2013-07-09 09:43:17 +0200
committerTom Rini <trini@ti.com>2013-08-15 09:09:29 -0400
commita704a6d615179a25f556c99d31cbc4ee366ffb54 (patch)
treef3711d3ae6ca2da11162de7b10b93c8efec43602 /arch/arm/cpu/arm1136/omap24xx
parent802b3c7c1826018530acc8a7b8fe83f11614c937 (diff)
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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/cpu/arm1136/omap24xx')
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