Messages in this thread Patch in this message |  | | From | Cyrille Pitchen <> | Subject | [PATCH 1/9] mtd: spi-nor: improve macronix_quad_enable() | Date | Tue, 4 Oct 2016 18:37:03 +0200 |
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The patch checks whether the Quad Enable bit is already set in the Status Register. If so, the function exits immediately with a successful return code. Otherwise, a message is now printed telling we're setting the non-volatile bit.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> --- drivers/mtd/spi-nor/spi-nor.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index d0fc165d7d66..5c87b2d99507 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -1211,6 +1211,11 @@ static int macronix_quad_enable(struct spi_nor *nor) val = read_sr(nor); if (val < 0) return val; + if (val & SR_QUAD_EN_MX) + return 0; + + /* Update the Quad Enable bit. */ + dev_info(nor->dev, "setting Macronix Quad Enable (non-volatile) bit\n"); write_enable(nor); write_sr(nor, val | SR_QUAD_EN_MX); -- 2.7.4
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