[U-Boot] [PATCH 2/5] mtd: spi_flash: Support clearing status register

[Ahmed Samir Khalil]

A function to clear status register-1 after error
flag(s) being triggered.

Signed-off-by: Ahmed S. Khalil <engkhalil86 at gmail.com>
---
 drivers/mtd/spi/spi_flash.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 34f6888..52dcb84 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -110,6 +110,27 @@ static int write_cr(struct spi_flash *flash, u8 wc)
 
 	return 0;
 }
+
+/*
+ * Clear status register-1
+ *
+ * TODO: Check validity for the other flash vendors.
+ */
+static int clear_sr(struct spi_flash *flash)
+{
+	struct spi_slave *spi = flash->spi;
+	u8 cmd, buf;
+	int ret;
+
+	cmd = CMD_CLEAR_STATUS;
+	ret = spi_flash_cmd_write(spi, cmd, 1, buf, 1);
+	if (ret < 0) {
+		debug("SF: fail to clear status register\n");
+		return ret;
+	}
+
+	return ret;
+}
 #endif
 
 #ifdef CONFIG_SPI_FLASH_BAR
-- 
2.7.4