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| author | Poonam Aggrwal <poonam.aggrwal@freescale.com> | 2011-06-29 16:32:52 +0530 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-09-29 19:01:04 -0500 |
| commit | fb855f43a1cdcda5f93d971063330505548d5919 (patch) | |
| tree | ac26c7792ddc31dcc5d83222cf2f1880e61f77d9 /arch/powerpc/cpu/mpc85xx/cpu_init_early.c | |
| parent | 42aee64bd95e91278cce6cfe1de8f1bfb2fd2005 (diff) | |
| download | u-boot-imx-fb855f43a1cdcda5f93d971063330505548d5919.zip u-boot-imx-fb855f43a1cdcda5f93d971063330505548d5919.tar.gz u-boot-imx-fb855f43a1cdcda5f93d971063330505548d5919.tar.bz2 | |
powerpc/P1010: Add workaround for erratum P1010-A003549 (related to IFC)
Issue:
Peripheral connected to IFC_CS3 may hamper booting from IFC.
Impact:
Boot from IFC may not be successful if IFC_CS3 is used.
Workaround:
If IFC_CS3 is used, gate IFC_CS3 while booting from NAND or NOR.
Also Software should select IFC_CS3 using PMUXCR[26:27] = 0x01.
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx/cpu_init_early.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init_early.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c index 359f03e..c42efb1 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c @@ -30,6 +30,9 @@ void cpu_init_early_f(void) { u32 mas0, mas1, mas2, mas3, mas7; int i; +#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549 + ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); +#endif /* Pointer is writable since we allocated a register for it */ gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET); @@ -49,6 +52,15 @@ void cpu_init_early_f(void) write_tlb(mas0, mas1, mas2, mas3, mas7); +/* + * Work Around for IFC Erratum A-003549. This issue is P1010 + * specific. LCLK(a free running clk signal) is muxed with IFC_CS3 on P1010 SOC + * Hence specifically selecting CS3. + */ +#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549 + setbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_LCLK_IFC_CS3); +#endif + init_laws(); invalidate_tlb(1); init_tlbs(); |