On Fri, May 25, 2012 at 1:44 AM, Viswanath Puttagunta <vishp@xxxxxx> wrote:
> Turn off IO & PBIAS cells and then SD card VMMC as soon
> as we get disconnect interrupt. Failure to do so might
> cause current spikes (latch-up issue) which can potentially
> burn the IO cells.
>
> Signed-off-by: Viswanath Puttagunta <vishp@xxxxxx>
> ---
> drivers/mmc/host/omap_hsmmc.c | 13 ++++++++++---
> 1 files changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index 56d4499..61d830f 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -1177,10 +1177,17 @@ static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
> carddetect = -ENOSYS;
> }
>
> - if (carddetect)
> + if (carddetect) {
> mmc_detect_change(host->mmc, (HZ * 200) / 1000);
> - else
> - mmc_detect_change(host->mmc, (HZ * 50) / 1000);
> + } else {
> + if ((MMC_POWER_OFF != host->power_mode) &&
Should be if((host->power_mode != MMC_POWER_OFF)
> + (mmc_slot(host).set_power != NULL)) {
> + mmc_slot(host).set_power(host->dev, host->slot_id,
> + 0, 0);
> + host->power_mode = MMC_POWER_OFF;
This is just changing the default behaviour, irrespective of whether
the errata is applicable.
What is the effect of this change for other boards / platforms ?
> + }
> + mmc_detect_change(host->mmc, 0);
> + }
> return IRQ_HANDLED;
> }
>
> --
> 1.7.4.1
>
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