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    SubjectRE: [PATCH 3.16 197/305] memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing
    Date
    Ok No problem.

    Sebastien



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    -----Message d'origine-----
    De : Ben Hutchings [mailto:ben@decadent.org.uk]
    Envoyé : samedi 13 août 2016 19:43
    À : linux-kernel@vger.kernel.org; stable@vger.kernel.org
    Cc : akpm@linux-foundation.org; Roger Quadros; Ocquidant, Sebastien
    Objet : [PATCH 3.16 197/305] memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing

    3.16.37-rc1 review patch. If anyone has any objections, please let me know.

    ------------------

    From: "Ocquidant, Sebastien" <sebastienocquidant@eaton.com>

    commit 8f50b8e57442d28e41bb736c173d8a2490549a82 upstream.

    In the omap gpmc driver it can be noticed that GPMC_CONFIG4_OEEXTRADELAY is overwritten by the WEEXTRADELAY value from the device tree and GPMC_CONFIG4_WEEXTRADELAY is not updated by the value from the device tree.

    As a consequence, the memory accesses cannot be configured properly when the extra delay are needed for OE and WE.

    Fix the update of GPMC_CONFIG4_WEEXTRADELAY with the value from the device tree file and prevents GPMC_CONFIG4_OEXTRADELAY being overwritten by the WEXTRADELAY value from the device tree.

    Signed-off-by: Ocquidant, Sebastien <sebastienocquidant@eaton.com>
    Signed-off-by: Roger Quadros <rogerq@ti.com>
    [bwh: Backported to 3.16: adjust filename]
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    arch/arm/mach-omap2/gpmc.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/arm/mach-omap2/gpmc.c
    +++ b/arch/arm/mach-omap2/gpmc.c
    @@ -274,7 +274,7 @@ static void gpmc_cs_bool_timings(int cs,
    gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
    GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay);
    gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
    - GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay);
    + GPMC_CONFIG4_WEEXTRADELAY, p->we_extra_delay);
    gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
    GPMC_CONFIG6_CYCLE2CYCLESAMECSEN,
    p->cycle2cyclesamecsen);

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