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mmc: tegra2: Implement card-detect hook.

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On Tegra2, card-detection is implemented by passing the card-detection
GPIOs to the MMC driver at initialization time. Instead of implementing
the board_mmc_getcd() function, use the card-detect hook and allow
boards to override it by providing their own board_mmc_getcd()
implementation.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
This commit is contained in:
Thierry Reding 2012-01-02 01:15:39 +00:00 committed by Andy Fleming
parent d48d2e21d4
commit bf83662ba3
1 changed files with 13 additions and 19 deletions
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32
drivers/mmc/tegra2_mmc.c
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@ -474,6 +474,18 @@ static int mmc_core_init(struct mmc *mmc)
return 0;
}
int tegra2_mmc_getcd(struct mmc *mmc)
{
struct mmc_host *host = (struct mmc_host *)mmc->priv;
debug("tegra2_mmc_getcd called\n");
if (host->cd_gpio >= 0)
return !gpio_get_value(host->cd_gpio);
return 1;
}
int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
{
struct mmc_host *host;
@ -512,6 +524,7 @@ int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
mmc->send_cmd = mmc_send_cmd;
mmc->set_ios = mmc_set_ios;
mmc->init = mmc_core_init;
mmc->getcd = tegra2_mmc_getcd;
mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
if (bus_width == 8)
@ -535,22 +548,3 @@ int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
return 0;
}
/* this is a weak define that we are overriding */
int board_mmc_getcd(u8 *cd, struct mmc *mmc)
{
struct mmc_host *host = (struct mmc_host *)mmc->priv;
debug("board_mmc_getcd called\n");
*cd = 1; /* Assume card is inserted, or eMMC */
if (IS_SD(mmc)) {
if (host->cd_gpio >= 0) {
if (gpio_get_value(host->cd_gpio))
*cd = 0;
}
}
return 0;
}