From 777271d0f33da306575ef776c75f66fc27246bf0 Mon Sep 17 00:00:00 2001 From: Arnd Hannemann Date: Tue, 24 Aug 2010 17:27:01 +0200 Subject: mmc: Allow the platform to specify the sh_mmcif get_cd handler In some platforms (e.g. AP4EVB) the card detect pin of a slot is not directly connected to the sh_mmcif controller, so that polling needs to be used. To overcome the overhead induced by querying the controller on each poll cycle, card detection can be handled in the platform code more efficiently. This patch exposes a get_cd hook for that purpose. Signed-off-by: Arnd Hannemann Tested-by: Yusuke Goda Signed-off-by: Samuel Ortiz --- drivers/mmc/host/sh_mmcif.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/mmc') diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 0f06b8002814..ddd09840520b 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -710,9 +710,21 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) host->bus_width = ios->bus_width; } +static int sh_mmcif_get_cd(struct mmc_host *mmc) +{ + struct sh_mmcif_host *host = mmc_priv(mmc); + struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; + + if (!p->get_cd) + return -ENOSYS; + else + return p->get_cd(host->pd); +} + static struct mmc_host_ops sh_mmcif_ops = { .request = sh_mmcif_request, .set_ios = sh_mmcif_set_ios, + .get_cd = sh_mmcif_get_cd, }; static void sh_mmcif_detect(struct mmc_host *mmc) -- cgit v1.2.3