Commit 32c90f16 authored Dec 06, 2016 by Cyrille Pitchen

mtd: spi-nor: improve macronix_quad_enable()



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.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>

parent e99ca98f

drivers/mtd/spi-nor/spi-nor.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1305,6 +1305,9 @@ 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;

		write_enable(nor);

		write_sr(nor, val \| SR_QUAD_EN_MX);