From: Takahiro Kuwano <takahiro.kuw...@infineon.com>
The spansion_sr_ready() reads status register 1 by Read Any Register
commnad. This function is called from Flash specific hook with die address
and dummy cycles to support multi-die package parts from Spansion/Cypress.
Signed-off-by: Takahiro Kuwano <takahiro.kuw...@infineon.com>
Reviewed-by: Pratyush Yadav <p.ya...@ti.com>
---
Changes in v8:
- No change
Changes in v7:
- No change
Changes in v6:
- No change
Changes in v5:
- New in v5, separated from another patch
drivers/mtd/spi/spi-nor-core.c | 29 +++++++++++++++++++++++++++++
include/linux/mtd/spi-nor.h | 1 +
2 files changed, 30 insertions(+)
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 8a2c5d949a..0e013e0c61 100644
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -523,6 +523,35 @@ static int set_4byte(struct spi_nor *nor, const struct
flash_info *info,
}
}
+#ifdef CONFIG_SPI_FLASH_SPANSION
+/*
+ * Read status register 1 by using Read Any Register command to support multi
+ * die package parts.
+ */
+static int spansion_sr_ready(struct spi_nor *nor, u32 addr_base, u8 dummy)
+{
+ u32 reg_addr = addr_base + SPINOR_REG_ADDR_STR1V;
+ u8 sr;
+ int ret;
+
+ ret = spansion_read_any_reg(nor, reg_addr, dummy, &sr);
+ if (ret < 0)
+ return ret;
+
+ if (sr & (SR_E_ERR | SR_P_ERR)) {
+ if (sr & SR_E_ERR)
+ dev_dbg(nor->dev, "Erase Error occurred\n");
+ else
+ dev_dbg(nor->dev, "Programming Error occurred\n");
+
+ nor->write_reg(nor, SPINOR_OP_CLSR, NULL, 0);
+ return -EIO;
+ }
+
+ return !(sr & SR_WIP);
+}
+#endif
+
static int spi_nor_sr_ready(struct spi_nor *nor)
{
int sr = read_sr(nor);
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 2236e36e28..8a187eaf26 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -123,6 +123,7 @@
#define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */
#define SPINOR_OP_RDAR 0x65 /* Read any register */
#define SPINOR_OP_WRAR 0x71 /* Write any register */
+#define SPINOR_REG_ADDR_STR1V 0x00800000
#define SPINOR_REG_ADDR_CFR1V 0x00800002
/* Used for Micron flashes only. */
--
2.25.1
