The patch titled
Blackfin SPI Driver: Fix erroneous SPI Clock divisor calculation
has been added to the -mm tree. Its filename is
blackfin-spi-driver-fix-erroneous-spi-clock-divisor-calculation.patch
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------------------------------------------------------
Subject: Blackfin SPI Driver: Fix erroneous SPI Clock divisor calculation
From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Fix erroneous SPI Clock divisor calculation. Make sure SPI_BAUD is always
>= 2. Writing a value of 0 or 1 to the SPI_BAUD register disables the
serial clock.
Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx>
Acked-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/blackfin/include/asm/bfin5xx_spi.h | 2 ++
drivers/spi/spi_bfin5xx.c | 3 +++
2 files changed, 5 insertions(+)
diff -puN arch/blackfin/include/asm/bfin5xx_spi.h~blackfin-spi-driver-fix-erroneous-spi-clock-divisor-calculation arch/blackfin/include/asm/bfin5xx_spi.h
--- a/arch/blackfin/include/asm/bfin5xx_spi.h~blackfin-spi-driver-fix-erroneous-spi-clock-divisor-calculation
+++ a/arch/blackfin/include/asm/bfin5xx_spi.h
@@ -11,6 +11,8 @@
#ifndef _SPI_CHANNEL_H_
#define _SPI_CHANNEL_H_
+#define MIN_SPI_BAUD_VAL 2
+
#define SPI_READ 0
#define SPI_WRITE 1
diff -puN drivers/spi/spi_bfin5xx.c~blackfin-spi-driver-fix-erroneous-spi-clock-divisor-calculation drivers/spi/spi_bfin5xx.c
--- a/drivers/spi/spi_bfin5xx.c~blackfin-spi-driver-fix-erroneous-spi-clock-divisor-calculation
+++ a/drivers/spi/spi_bfin5xx.c
@@ -158,6 +158,9 @@ static u16 hz_to_spi_baud(u32 speed_hz)
if ((sclk % (2 * speed_hz)) > 0)
spi_baud++;
+ if (spi_baud < MIN_SPI_BAUD_VAL)
+ spi_baud = MIN_SPI_BAUD_VAL;
+
return spi_baud;
}
_
Patches currently in -mm which might be from michael.hennerich@xxxxxxxxxx are
linux-next.patch
input-touchscreen-driver-add-support-ad7877-touchscreen-driver.patch
input-ad7879-touchscreen-driver.patch
input-ad7879-touchscreen-driver-dont-use-bus_id.patch
blackfin-spi-driver-fix-erroneous-spi-clock-divisor-calculation.patch
blackfin-spi-driver-add-gpio-controlled-spi-slave-select-support.patch
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