/**
* Setup the bus width and IO speed
* @param mci_pdata MCI platform data
* @param mci_dev MCI device instance
* @param bus_width New bus width value (1, 4 or 8)
* @param clock New clock in Hz (can be '0' to disable the clock)
*
* Drivers currently realized values are stored in MCI's platformdata
*/
static void mxs_mci_set_ios(struct mci_host *host, struct mci_ios *ios)
{
struct mxs_mci_host *mxs_mci = to_mxs_mci(host);
switch (ios->bus_width) {
case MMC_BUS_WIDTH_8:
mxs_mci->bus_width = 2;
host->bus_width = 8; /* 8 bit is possible */
break;
case MMC_BUS_WIDTH_4:
mxs_mci->bus_width = 1;
host->bus_width = 4; /* 4 bit is possible */
break;
case MMC_BUS_WIDTH_1:
mxs_mci->bus_width = 0;
host->bus_width = 1; /* 1 bit is possible */
break;
default:
return;
}
mxs_mci->clock = mxs_mci_setup_clock_speed(mxs_mci, ios->clock);
pr_debug("IO settings: bus width=%d, frequency=%u Hz\n", host->bus_width,
mxs_mci->clock);
}
/**
* Setup the bus width and IO speed
* @param mci_pdata MCI platform data
* @param mci_dev MCI device instance
* @param bus_width New bus width value (1, 4 or 8)
* @param clock New clock in Hz (can be '0' to disable the clock)
*
* Drivers currently realized values are stored in MCI's platformdata
*/
static void mxs_mci_set_ios(struct mci_host *host, struct mci_ios *ios)
{
struct mxs_mci_host *mxs_mci = to_mxs_mci(host);
switch (ios->bus_width) {
case MMC_BUS_WIDTH_8:
mxs_mci->bus_width = 2;
pr_debug("IO settings: changing bus width to 8 bits\n");
break;
case MMC_BUS_WIDTH_4:
mxs_mci->bus_width = 1;
pr_debug("IO settings: changing bus width to 4 bits\n");
break;
case MMC_BUS_WIDTH_1:
mxs_mci->bus_width = 0;
pr_debug("IO settings: changing bus width to 1 bit\n");
break;
default:
pr_debug("IO settings: unsupported bus width!\n");
return;
}
mxs_mci->clock = mxs_mci_setup_clock_speed(mxs_mci, ios->clock);
dev_dbg(host->hw_dev, "IO settings: frequency=%u Hz\n", mxs_mci->clock);
}
