[PATCH 2/6] mmc: sdhci-esdhc-imx: fix incorrect max_discard_to for uSDHC

[Shawn Guo]

On Tue, Dec 10, 2013 at 08:56:04PM +0800, Dong Aisheng wrote:
> The default sdhci code use the 1 << 27 as the max timeout counter to
> to calculate the max_discard_to, however it's not correct for uSDHC
> since its the max counter is 1 << 28.
> Implement esdhc_get_max_timeout to handle it correctly.
> 
> Signed-off-by: Dong Aisheng <b29396 at freescale.com>
> Reported-by: Ed Sutter <ed.sutter at alcatel-lucent.com>
> ---
>  drivers/mmc/host/sdhci-esdhc-imx.c |   10 ++++++++++
>  1 files changed, 10 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 461a4c3..97b35e1 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -859,6 +859,15 @@ static int esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
>  	return esdhc_change_pinstate(host, uhs);
>  }
>  
> +unsigned int esdhc_get_max_timeout(struct sdhci_host *host)

static?

Shawn

> +{
> +	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +	struct pltfm_imx_data *imx_data = pltfm_host->priv;
> +	u32 max_to = esdhc_is_usdhc(imx_data) ? 1 << 28 : 1 << 27;
> +
> +	return max_to / (esdhc_pltfm_get_max_clock(host) / 1000);
> +}
> +
>  static struct sdhci_ops sdhci_esdhc_ops = {
>  	.read_l = esdhc_readl_le,
>  	.read_w = esdhc_readw_le,
> @@ -871,6 +880,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
>  	.get_ro = esdhc_pltfm_get_ro,
>  	.platform_bus_width = esdhc_pltfm_bus_width,
>  	.set_uhs_signaling = esdhc_set_uhs_signaling,
> +	.get_max_timeout = esdhc_get_max_timeout,
>  };
>  
>  static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
> -- 
> 1.7.2.rc3
> 
>