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| author | Xie Xiaobo <r63061@freescale.com> | 2011-10-03 12:18:40 -0700 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-10-09 17:57:54 -0500 |
| commit | 8af3d22db9aaf1d05cd971940e577d420e9eae6f (patch) | |
| tree | c9a7862a7302da370da48e39ac4abb929b5319a1 | |
| parent | ae2044d8b30bf82fef5550497a0d4315edf6b62e (diff) | |
| download | u-boot-imx-8af3d22db9aaf1d05cd971940e577d420e9eae6f.zip u-boot-imx-8af3d22db9aaf1d05cd971940e577d420e9eae6f.tar.gz u-boot-imx-8af3d22db9aaf1d05cd971940e577d420e9eae6f.tar.bz2 | |
powerpc/mpc8536ds: Invert SDHC_WP pin polarity
MPC8536 Rev 1.0 silicon have NMG_eSDHC118 erratum, so that the SDHC write
protected pin polarity does not follow the SD card standard in MPC8536
Rev 1.0 silicon.
The MPC8536DS board invert the SDHC_WP pin as a workaround. However, this
silicon erratum has been fixed in Rev 1.1, So need invert the SDHC_WP
polarity again when use the MPC8536 Rev1.1 and greater on MPC8536DS board.
Signed-off-by: Xie Xiaobo <r63061@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | board/freescale/mpc8536ds/mpc8536ds.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/board/freescale/mpc8536ds/mpc8536ds.c b/board/freescale/mpc8536ds/mpc8536ds.c index 2beea34..c9f85c8 100644 --- a/board/freescale/mpc8536ds/mpc8536ds.c +++ b/board/freescale/mpc8536ds/mpc8536ds.c @@ -51,6 +51,14 @@ int board_early_init_f (void) setbits_be32(&gur->pmuxcr, (MPC85xx_PMUXCR_SDHC_CD | MPC85xx_PMUXCR_SDHC_WP)); + + /* The MPC8536DS board insert the SDHC_WP pin for erratum NMG_eSDHC118, + * however, this erratum only applies to MPC8536 Rev1.0. + * So set SDHC_WP to active-low when use MPC8536 Rev1.1 and greater.*/ + if ((((SVR_MAJ(get_svr()) & 0x7) == 0x1) && + (SVR_MIN(get_svr()) >= 0x1)) + || (SVR_MAJ(get_svr() & 0x7) > 0x1)) + setbits_be32(&gur->gencfgr, MPC85xx_GENCFGR_SDHC_WP_INV); #endif return 0; } |