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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>
hifive-unleashed-5.1
Kevin Cernekee 2011-05-08 10:48:00 -07:00 committed by David Woodhouse
parent 16004f3685
commit aa0846534b
1 changed files with 7 additions and 4 deletions
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11
drivers/mtd/devices/m25p80.c
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@ -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;