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| author | Kumar Gala <galak@kernel.crashing.org> | 2011-10-03 08:37:57 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-10-03 08:52:15 -0500 |
| commit | 2b3a1cdd9ed14441ae91845851aaf91adddbafc0 (patch) | |
| tree | dd409bc5656f74b3e9bc69054219eb076ada6d08 /arch/powerpc/cpu | |
| parent | 5ace2992b5a89afaa3144af4a076480651f4ddfa (diff) | |
| download | u-boot-imx-2b3a1cdd9ed14441ae91845851aaf91adddbafc0.zip u-boot-imx-2b3a1cdd9ed14441ae91845851aaf91adddbafc0.tar.gz u-boot-imx-2b3a1cdd9ed14441ae91845851aaf91adddbafc0.tar.bz2 | |
powerpc/mpc8548: Add workaround for erratum NMG_LBC103
The erratum NMG_LBC103 is LBIU3 in MPC8548 errata document.
Any local bus transaction may fail during LBIU resynchronization
process when the clock divider [CLKDIV] is changing. Ensure there
is no transaction on the local bus for at least 100 microseconds
after changing clock divider LCRR[CLKDIV].
Refer to the erratum LBIU3 of mpc8548.
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index f0fa0f5..a09eb91 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -100,6 +100,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if ((SVR_MAJ(svr) == 1) || IS_SVR_REV(svr, 2, 0)) puts("Work-around for Erratum NMG DDR120 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_LBC103 + puts("Work-around for Erratum NMG_LBC103 enabled\n"); +#endif return 0; } diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index e2c5b6f..0a4ce53 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -463,6 +463,9 @@ skip_l2: clrsetbits_be32(&lbc->lcrr, LCRR_CLKDIV, CONFIG_SYS_LBC_LCRR); __raw_readl(&lbc->lcrr); isync(); +#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_LBC103 + udelay(100); +#endif #endif #ifdef CONFIG_SYS_FSL_USB1_PHY_ENABLE |