Re: [PATCH v3 1/2] mtd: spi-nor: add support to non-uniform SFDP SPI NOR flash memories

Boris Brezillon
2018-10-22T08:01:52Z

On Mon, 22 Oct 2018 06:04:13 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> -static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt)
> +static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt, u32 smpt_len)
> {
> const u32 *ret = NULL;
> - u32 i, addr;
> + u32 i, addr, nmaps;
> int err;
> u8 addr_width, read_opcode, read_dummy;
> u8 read_data_mask, data_byte, map_id;
> + bool map_id_is_valid = false;
>
> addr_width = nor->addr_width;
> read_dummy = nor->read_dummy;
> read_opcode = nor->read_opcode;
>
> + for (i = 0; i<smpt_len; i++)
> + pr_info("%s:%i smpt[%d]=%08x\n", __func__, __LINE__, i, smpt[i]);
> +
> map_id = 0;
> - i = 0;
> /* Determine if there are any optional Detection Command Descriptors */
> - while (!(smpt[i] & SMPT_DESC_TYPE_MAP)) {
> + for (i = 0; i< smpt_len; i++) {
> + if (!(smpt[i] & SMPT_DESC_TYPE_MAP))
> + break;
> +
> read_data_mask = SMPT_CMD_READ_DATA(smpt[i]);
> nor->addr_width = spi_nor_smpt_addr_width(nor, smpt[i]);
> nor->read_dummy = spi_nor_smpt_read_dummy(nor, smpt[i]);

Could you also print the ->addr_width, ->read_dummy and ->read_opcode
here?

> @@ -2894,18 +2900,35 @@ static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt)
> * Configuration that is currently in use.
> */
> map_id = map_id << 1 | !!(data_byte & read_data_mask);
> + map_id_is_valid = true;
> i = i + 2;
> }