linux-kernel - Re: [PATCH V1] mmc: sdhci-msm: Override DLL_CONFIG only if the valid value is supplied

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Date:   Wed, 8 Jul 2020 15:33:10 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Andy Gross <agross@...nel.org>,
        "Bao D. Nguyen" <nguyenb@...eaurora.org>,
        Sarthak Garg <sartgarg@...eaurora.org>
Subject: Re: [PATCH V1] mmc: sdhci-msm: Override DLL_CONFIG only if the valid
 value is supplied

On Wed, 8 Jul 2020 at 15:12, Veerabhadrarao Badiganti
<vbadigan@...eaurora.org> wrote:
>
> During DLL initialization, the DLL_CONFIG register value would be
> updated with the value supplied from the device-tree.
>
> Override this register only if a valid value is supplied.
>
> Fixes: 03591160ca19 ("mmc: sdhci-msm: Read and use DLL Config property from device tree file")
> Signed-off-by: Veerabhadrarao Badiganti <vbadigan@...eaurora.org>

Applied for fixes, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/sdhci-msm.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index efd2bae1430c..93d67a3a899f 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -626,8 +626,9 @@ static int msm_init_cm_dll(struct sdhci_host *host)
>         config &= ~CORE_CLK_PWRSAVE;
>         writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec);
>
> -       config = msm_host->dll_config;
> -       writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);
> +       if (msm_host->dll_config)
> +               writel_relaxed(msm_host->dll_config,
> +                               host->ioaddr + msm_offset->core_dll_config);
>
>         if (msm_host->use_14lpp_dll_reset) {
>                 config = readl_relaxed(host->ioaddr +
> --
> Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
>