lkml.org 
[lkml]   [2018]   [Dec]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH AUTOSEL 4.14 05/59] ARM: imx: update the cpu power up timing setting on i.mx6sx
    Date
    From: Anson Huang <anson.huang@nxp.com>

    [ Upstream commit 1e434b703248580b7aaaf8a115d93e682f57d29f ]

    The sw2iso count should cover ARM LDO ramp-up time,
    the MAX ARM LDO ramp-up time may be up to more than
    100us on some boards, this patch sets sw2iso to 0xf
    (~384us) which is the reset value, and it is much
    more safe to cover different boards, since we have
    observed that some customer boards failed with current
    setting of 0x2.

    Fixes: 05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6sx")
    Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
    Reviewed-by: Fabio Estevam <festevam@gmail.com>
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm/mach-imx/cpuidle-imx6sx.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c
    index c5a5c3a70ab1..edb888ac5ad3 100644
    --- a/arch/arm/mach-imx/cpuidle-imx6sx.c
    +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c
    @@ -108,7 +108,7 @@ int __init imx6sx_cpuidle_init(void)
    * except for power up sw2iso which need to be
    * larger than LDO ramp up time.
    */
    - imx_gpc_set_arm_power_up_timing(2, 1);
    + imx_gpc_set_arm_power_up_timing(0xf, 1);
    imx_gpc_set_arm_power_down_timing(1, 1);

    return cpuidle_register(&imx6sx_cpuidle_driver, NULL);
    --
    2.19.1
    \
     
     \ /
      Last update: 2018-12-26 23:40    [W:4.073 / U:0.040 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site