linux-kernel - Re: [PATCH] mmc: host: sdhci-of-arasan: fix timings allocation code

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Date:   Wed, 5 Aug 2020 08:35:21 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Manish Narani <manish.narani@...inx.com>
Cc:     Michal Simek <michal.simek@...inx.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        git@...inx.com
Subject: Re: [PATCH] mmc: host: sdhci-of-arasan: fix timings allocation code

On Tue, 14 Jul 2020 at 21:12, Manish Narani <manish.narani@...inx.com> wrote:
>
> The initial code that was adding delays was doing a cast over undefined
> memory. This meant that the delays would be all gibberish.
>
> This change, allocates all delays on the stack, and assigns them from the
> ZynqMP & Versal macros/phase-list. And then finally copies them over the
> common iclk_phase & oclk_phase variables.
>
> Signed-off-by: Manish Narani <manish.narani@...inx.com>

Applied for next (a while ago), thanks!
Kind regards
Uffe



> ---
>  drivers/mmc/host/sdhci-of-arasan.c |   25 ++++++++++++++-----------
>  1 files changed, 14 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index db9b544..90e42d1 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -1025,7 +1025,6 @@ static void arasan_dt_read_clk_phase(struct device *dev,
>  static void arasan_dt_parse_clk_phases(struct device *dev,
>                                        struct sdhci_arasan_clk_data *clk_data)
>  {
> -       int *iclk_phase, *oclk_phase;
>         u32 mio_bank = 0;
>         int i;
>
> @@ -1037,28 +1036,32 @@ static void arasan_dt_parse_clk_phases(struct device *dev,
>         clk_data->set_clk_delays = sdhci_arasan_set_clk_delays;
>
>         if (of_device_is_compatible(dev->of_node, "xlnx,zynqmp-8.9a")) {
> -               iclk_phase = (int [MMC_TIMING_MMC_HS400 + 1]) ZYNQMP_ICLK_PHASE;
> -               oclk_phase = (int [MMC_TIMING_MMC_HS400 + 1]) ZYNQMP_OCLK_PHASE;
> +               u32 zynqmp_iclk_phase[MMC_TIMING_MMC_HS400 + 1] =
> +                       ZYNQMP_ICLK_PHASE;
> +               u32 zynqmp_oclk_phase[MMC_TIMING_MMC_HS400 + 1] =
> +                       ZYNQMP_OCLK_PHASE;
>
>                 of_property_read_u32(dev->of_node, "xlnx,mio-bank", &mio_bank);
>                 if (mio_bank == 2) {
> -                       oclk_phase[MMC_TIMING_UHS_SDR104] = 90;
> -                       oclk_phase[MMC_TIMING_MMC_HS200] = 90;
> +                       zynqmp_oclk_phase[MMC_TIMING_UHS_SDR104] = 90;
> +                       zynqmp_oclk_phase[MMC_TIMING_MMC_HS200] = 90;
>                 }
>
>                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
> -                       clk_data->clk_phase_in[i] = iclk_phase[i];
> -                       clk_data->clk_phase_out[i] = oclk_phase[i];
> +                       clk_data->clk_phase_in[i] = zynqmp_iclk_phase[i];
> +                       clk_data->clk_phase_out[i] = zynqmp_oclk_phase[i];
>                 }
>         }
>
>         if (of_device_is_compatible(dev->of_node, "xlnx,versal-8.9a")) {
> -               iclk_phase = (int [MMC_TIMING_MMC_HS400 + 1]) VERSAL_ICLK_PHASE;
> -               oclk_phase = (int [MMC_TIMING_MMC_HS400 + 1]) VERSAL_OCLK_PHASE;
> +               u32 versal_iclk_phase[MMC_TIMING_MMC_HS400 + 1] =
> +                       VERSAL_ICLK_PHASE;
> +               u32 versal_oclk_phase[MMC_TIMING_MMC_HS400 + 1] =
> +                       VERSAL_OCLK_PHASE;
>
>                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
> -                       clk_data->clk_phase_in[i] = iclk_phase[i];
> -                       clk_data->clk_phase_out[i] = oclk_phase[i];
> +                       clk_data->clk_phase_in[i] = versal_iclk_phase[i];
> +                       clk_data->clk_phase_out[i] = versal_oclk_phase[i];
>                 }
>         }
>
> --
> 1.7.1
>