int spi_dw_init(struct device *dev)
{
struct spi_dw_config *info = dev->config->config_info;
struct spi_dw_data *spi = dev->driver_data;
_clock_config(dev);
_clock_on(dev);
#ifndef CONFIG_SOC_QUARK_SE_SS
if (read_ssi_comp_version(info->regs) != DW_SSI_COMP_VERSION) {
_clock_off(dev);
return DEV_NOT_CONFIG;
}
#endif
dev->driver_api = &dw_spi_api;
info->config_func();
device_sync_call_init(&spi->sync);
_spi_config_cs(dev);
/* Masking interrupt and making sure controller is disabled */
write_imr(DW_SPI_IMR_MASK, info->regs);
clear_bit_ssienr(info->regs);
DBG("Designware SPI driver initialized on device: %p\n", dev);
return DEV_OK;
}
static int spi_dw_suspend(struct device *dev)
{
DBG("%s: %p\n", __func__, dev);
_clock_off(dev);
return DEV_OK;
}
static void stop_clock_and_power_off(void)
{
uint32_t idx;
/* Assume clock control mutex is already acquired, and that block is currently off */
BUG_ON(vce_state.clock_enable_count != 0);
/* Theoretically, we might consider unmapping VCE regs here */
BUG_ON(vce_base == NULL);
/* Flush out the ISR */
{
unsigned long flags;
spin_lock_irqsave(&vce_state.isrclocks_spin, flags);
spin_unlock_irqrestore(&vce_state.isrclocks_spin, flags);
}
_clock_off();
_power_off();
idx = vce_state.powertrace_idx++ & vce_state.powertrace_idxmask;
if (vce_state.powertrace != NULL)
vce_state.powertrace[idx] = jiffies;
}
