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Commit 271707b1 authored by Graham Moore's avatar Graham Moore Committed by Brian Norris
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mtd: nand: denali: max_banks calculation changed in revision 5.1 



Read Denali hardware revision number and use it to
calculate max_banks,  The encoding of max_banks changed
in Denali revision 5.1.

Signed-off-by: default avatarGraham Moore <grmoore@opensource.altera.com>
[Brian: parentheses around macro arg]
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 9c07d094

drivers/mtd/nand/denali.c

+10 −1
Original line number Diff line number Diff line
@@ -458,8 +458,17 @@ static void find_valid_banks(struct denali_nand_info *denali) 
static void detect_max_banks(struct denali_nand_info *denali)

{

	uint32_t features = ioread32(denali->flash_reg + FEATURES);

	/*

	 * Read the revision register, so we can calculate the max_banks

	 * properly: the encoding changed from rev 5.0 to 5.1

	 */

	u32 revision = MAKE_COMPARABLE_REVISION(

				ioread32(denali->flash_reg + REVISION));



	if (revision < REVISION_5_1)

		denali->max_banks = 2 << (features & FEATURES__N_BANKS);

	else

		denali->max_banks = 1 << (features & FEATURES__N_BANKS);

}



static void detect_partition_feature(struct denali_nand_info *denali)

drivers/mtd/nand/denali.h

+2 −0
Original line number Diff line number Diff line
@@ -178,6 +178,8 @@ 


#define REVISION				0x370

#define     REVISION__VALUE				0xffff

#define MAKE_COMPARABLE_REVISION(x)		swab16((x) & REVISION__VALUE)

#define REVISION_5_1				0x00000501



#define ONFI_DEVICE_FEATURES			0x380

#define     ONFI_DEVICE_FEATURES__VALUE			0x003f