orion_spi: handle 88F6183 erratum
Add support to orion_spi for the 88F6183 ARM SoC by adding code to work
around a 6183-specific erratum.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/spi/orion_spi.c b/drivers/spi/orion_spi.c
index b872bfa..014becb 100644
--- a/drivers/spi/orion_spi.c
+++ b/drivers/spi/orion_spi.c
@@ -364,6 +364,11 @@
return -EINVAL;
}
+ /* Fix ac timing if required. */
+ if (orion_spi->spi_info->enable_clock_fix)
+ orion_spi_setbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
+ (1 << 14));
+
if (spi->bits_per_word == 0)
spi->bits_per_word = 8;
diff --git a/include/linux/spi/orion_spi.h b/include/linux/spi/orion_spi.h
index b4d9fa6..decf6d8 100644
--- a/include/linux/spi/orion_spi.h
+++ b/include/linux/spi/orion_spi.h
@@ -11,6 +11,7 @@
struct orion_spi_info {
u32 tclk; /* no <linux/clk.h> support yet */
+ u32 enable_clock_fix;
};
