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authorKevin Cernekee <cernekee@gmail.com>2011-05-08 10:48:00 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2011-05-25 02:02:30 +0100
commitaa0846534b9c7238187b4276e83efb9969d4c6e3 (patch)
tree383b75dea9fa0f79862c387fb415a118cd80b8be /drivers/mtd/devices
parent16004f3685541c57a280bae3fde6562256fd0ba5 (diff)
mtd: m25p80: Clean up JEDEC manufacturer checks
Use the manufacturer ID names from cfi.h instead of hard-coding hex constants. Introduce a JEDEC_MFR macro for clarity. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/devices')
-rw-r--r--drivers/mtd/devices/m25p80.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 15231d6d701..16adfaa7801 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -27,6 +27,7 @@
#include <linux/sched.h>
#include <linux/mod_devicetable.h>
+#include <linux/mtd/cfi.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
@@ -76,6 +77,8 @@
#define FAST_READ_DUMMY_BYTE 0
#endif
+#define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16)
+
/****************************************************************************/
struct m25p {
@@ -872,9 +875,9 @@ static int __devinit m25p_probe(struct spi_device *spi)
* up with the software protection bits set
*/
- if (info->jedec_id >> 16 == 0x1f ||
- info->jedec_id >> 16 == 0x89 ||
- info->jedec_id >> 16 == 0xbf) {
+ if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ATMEL ||
+ JEDEC_MFR(info->jedec_id) == CFI_MFR_INTEL ||
+ JEDEC_MFR(info->jedec_id) == CFI_MFR_SST) {
write_enable(flash);
write_sr(flash, 0);
}
@@ -892,7 +895,7 @@ static int __devinit m25p_probe(struct spi_device *spi)
flash->mtd.read = m25p80_read;
/* sst flash chips use AAI word program */
- if (info->jedec_id >> 16 == 0xbf)
+ if (JEDEC_MFR(info->jedec_id) == CFI_MFR_SST)
flash->mtd.write = sst_write;
else
flash->mtd.write = m25p80_write;