mtd: spi-nor: micron-st: Add support for mt25qu01g

Add support for the MT25QU01G 128MB Micron Serial NOR Flash Memory
model.

Link: https://www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/mt25q/die-rev-b/mt25q_qlkt_u_01g_bbb_0.pdf
Signed-off-by: Fabio Estevam <festevam@denx.de>
[ta: introduce die erase]
Link: https://lore.kernel.org/r/20231125123529.55686-6-tudor.ambarus@linaro.org
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>

diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index b63f1e9b97d00290a02240518a2e3962c69d4677..3c6499fdb712e4086a03f6d0f4f95b3bc86bf5d0 100644 (file)
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -209,10 +209,30 @@ static int st_nor_four_die_late_init(struct spi_nor *nor)
        return spi_nor_set_4byte_addr_mode(nor, true);
 }
 
+static int st_nor_two_die_late_init(struct spi_nor *nor)
+{
+       struct spi_nor_flash_parameter *params = nor->params;
+
+       params->die_erase_opcode = SPINOR_OP_MT_DIE_ERASE;
+       params->n_dice = 2;
+
+       /*
+        * Unfortunately the die erase opcode does not have a 4-byte opcode
+        * correspondent for these flashes. The SFDP 4BAIT table fails to
+        * consider the die erase too. We're forced to enter in the 4 byte
+        * address mode in order to benefit of the die erase.
+        */
+       return spi_nor_set_4byte_addr_mode(nor, true);
+}
+
 static struct spi_nor_fixups n25q00_fixups = {
        .late_init = st_nor_four_die_late_init,
 };
 
+static struct spi_nor_fixups mt25q01_fixups = {
+       .late_init = st_nor_two_die_late_init,
+};
+
 static struct spi_nor_fixups mt25q02_fixups = {
        .late_init = st_nor_four_die_late_init,
 };
@@ -455,6 +475,11 @@ static const struct flash_info st_nor_parts[] = {
                         SPI_NOR_BP3_SR_BIT6,
                .no_sfdp_flags = SECT_4K | SPI_NOR_QUAD_READ,
                .mfr_flags = USE_FSR,
+       }, {
+               .id = SNOR_ID(0x20, 0xbb, 0x21, 0x10, 0x44, 0x00),
+               .name = "mt25qu01g",
+               .mfr_flags = USE_FSR,
+               .fixups = &mt25q01_fixups,
        }, {
                .id = SNOR_ID(0x20, 0xbb, 0x21),
                .name = "n25q00a",