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mci atmel: implement card_present callback 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-01-18 12:52:29 +01:00
parent d21575ddea
commit 456fae0227
1 changed files with 17 additions and 8 deletions
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25
drivers/mci/atmel_mci.c
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@ -331,18 +331,26 @@ static int atmel_start_cmd(struct atmel_mci_host *host, struct mci_cmd *cmd,
return 0;
}
static int mci_card_present(struct mci_host *mci)
{
struct atmel_mci_host *host = to_mci_host(mci);
struct atmel_mci_platform_data *pd = host->hw_dev->platform_data;
int ret;
/* No gpio, assume card is present */
if (!gpio_is_valid(pd->detect_pin))
return 1;
ret = gpio_get_value(pd->detect_pin);
return ret == 0 ? 1 : 0;
}
/** init the host interface */
static int mci_reset(struct mci_host *mci, struct device_d *mci_dev)
{
int ret;
struct atmel_mci_host *host = to_mci_host(mci);
struct atmel_mci_platform_data *pd = host->hw_dev->platform_data;
ret = gpio_get_value(pd->detect_pin);
dev_dbg(host->hw_dev, "card %sdetected\n", ret != 0 ? "not " : "");
if (pd->detect_pin && ret == 1)
return -ENODEV;
clk_enable(host->clk);
atmel_mci_reset(host);
@ -454,6 +462,7 @@ static int mci_probe(struct device_d *hw_dev)
host->mci.send_cmd = mci_request;
host->mci.set_ios = mci_set_ios;
host->mci.init = mci_reset;
host->mci.card_present = mci_card_present;
host->mci.hw_dev = hw_dev;
host->mci.host_caps = pd->host_caps;