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drivers: flash: jesd216: improve support for address size selection

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Add a helper function to decode the address byte support data from the
SFDP BFP.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2021-03-03 13:25:02 -06:00 • committed by Carles Cufí
commit 6c4312605c
2 changed files with 11 additions and 3 deletions
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10
drivers/flash/jesd216.h
View file

@ -182,6 +182,16 @@ struct jesd216_bfp {
* * DW17-20 (quad/oct support) no API except jesd216_bfp_read_support().
*/
/* Extract the supported address bytes from BFP DW1. */
static inline uint8_t jesd216_bfp_addrbytes(const struct jesd216_bfp *hp)
{
uint32_t dw1 = sys_le32_to_cpu(hp->dw1);
uint8_t addr_support = (dw1 & JESD216_SFDP_BFP_DW1_ADDRBYTES_MASK)
>> JESD216_SFDP_BFP_DW1_ADDRBYTES_SHFT;
return addr_support;
}
/* Extract the density of the chip in bits from BFP DW2. */
static inline uint64_t jesd216_bfp_density(const struct jesd216_bfp *hp)
{

4
samples/drivers/jesd216/src/main.c
View file

@ -206,9 +206,7 @@ static void summarize_dw16(const struct jesd216_param_header *php,
return;
}
uint32_t dw1 = sys_le32_to_cpu(bfp->dw1);
uint8_t addr_support = (dw1 & JESD216_SFDP_BFP_DW1_ADDRBYTES_MASK)
>> JESD216_SFDP_BFP_DW1_ADDRBYTES_SHFT;
uint8_t addr_support = jesd216_bfp_addrbytes(bfp);
/* Don't display bits when 4-byte addressing is not supported. */
if (addr_support != JESD216_SFDP_BFP_DW1_ADDRBYTES_VAL_3B) {