/*!
* This function is used to configure a pin through the IOMUX module.
* FIXED ME: for backward compatible. Will be static function!
* @param pin a pin number as defined in \b #iomux_pin_name_t
* @param cfg an output function as defined in \b #iomux_pin_cfg_t
*
* @return 0 if successful; Non-zero otherwise
*/
static int iomux_config_mux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
{
u32 mux_reg = _get_mux_reg(pin);
if ((mux_reg > _get_mux_end()) || (mux_reg < IOMUXSW_MUX_CTL))
return -1;
if (cfg == IOMUX_CONFIG_GPIO)
writel(PIN_TO_ALT_GPIO(pin), mux_reg);
else
writel(cfg, mux_reg);
return 0;
}
/*!
* This function is used to configure a pin through the IOMUX module.
* @param pin a pin number as defined in \b #iomux_pin_name_t
* @param config a configuration as defined in \b #iomux_pin_cfg_t
*
* @return 0 if successful; Non-zero otherwise
*/
static int iomux_config_mux(iomux_pin_name_t pin, iomux_pin_cfg_t config)
{
u32 ret = 0;
u32 pin_index = PIN_TO_IOMUX_INDEX(pin);
void __iomem *mux_reg = _get_mux_reg(pin);
u32 mux_data = 0;
u8 *rp;
BUG_ON((mux_reg > _get_mux_end()) || (mux_reg < IOMUXSW_MUX_CTL));
spin_lock(&gpio_mux_lock);
if (config == IOMUX_CONFIG_GPIO)
mux_data = PIN_TO_ALT_GPIO(pin);
else
mux_data = config;
__raw_writel(mux_data, mux_reg);
/*
* Log a warning if a pin changes ownership
*/
rp = iomux_pin_res_table + pin_index;
if ((mux_data & *rp) && (*rp != mux_data)) {
/*
* Don't call printk if we're tweaking the console uart or
* we'll deadlock.
*/
printk(KERN_ERR "iomux_config_mux: Warning: iomux pin"
" config changed, reg=%p, "
" prev=0x%x new=0x%x\n", mux_reg, *rp, mux_data);
ret = -EINVAL;
}
*rp = mux_data;
spin_unlock(&gpio_mux_lock);
return ret;
}
