OpenWrt – Blame information for rev 3
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Rev | Author | Line No. | Line |
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1 | office | 1 | From 1e99d0d51ec97bf48edd277658004ce030543d98 Mon Sep 17 00:00:00 2001 |
2 | From: Cyrille Pitchen <cyrille.pitchen@atmel.com> |
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3 | Date: Tue, 6 Dec 2016 17:01:41 +0100 |
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4 | Subject: [PATCH] mtd: spi-nor: improve macronix_quad_enable() |
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5 | |||
6 | The patch checks whether the Quad Enable bit is already set in the Status |
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7 | Register. If so, the function exits immediately with a successful return |
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8 | code. |
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9 | |||
10 | Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> |
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11 | Reviewed-by: Jagan Teki <jagan@openedev.com> |
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12 | Acked-by: Marek Vasut <marek.vasut@gmail.com> |
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13 | --- |
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14 | drivers/mtd/spi-nor/spi-nor.c | 3 +++ |
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15 | 1 file changed, 3 insertions(+) |
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16 | |||
17 | --- a/drivers/mtd/spi-nor/spi-nor.c |
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18 | +++ b/drivers/mtd/spi-nor/spi-nor.c |
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3 | office | 19 | @@ -1305,6 +1305,9 @@ static int macronix_quad_enable(struct s |
1 | office | 20 | val = read_sr(nor); |
21 | if (val < 0) |
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22 | return val; |
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23 | + if (val & SR_QUAD_EN_MX) |
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24 | + return 0; |
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25 | + |
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26 | write_enable(nor); |
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27 | |||
28 | write_sr(nor, val | SR_QUAD_EN_MX); |