static int ar71xx_spi_setup(struct spi_device *spi)
{
int status;
if (spi->bits_per_word > 32)
return -EINVAL;
if (!spi->controller_state)
ar71xx_spi_setup_regs(spi);
status = spi_bitbang_setup(spi);
if (status && !spi->controller_state)
ar71xx_spi_restore_regs(spi);
return status;
}
static int ar71xx_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct ar71xx_spi *sp;
struct ar71xx_spi_platform_data *pdata;
struct resource *r;
int ret;
master = spi_alloc_master(&pdev->dev, sizeof(*sp));
if (master == NULL) {
dev_err(&pdev->dev, "failed to allocate spi master\n");
return -ENOMEM;
}
sp = spi_master_get_devdata(master);
platform_set_drvdata(pdev, sp);
pdata = pdev->dev.platform_data;
master->setup = ar71xx_spi_setup;
master->cleanup = ar71xx_spi_cleanup;
sp->bitbang.master = spi_master_get(master);
sp->bitbang.chipselect = ar71xx_spi_chipselect;
sp->bitbang.txrx_word[SPI_MODE_0] = ar71xx_spi_txrx_mode0;
sp->bitbang.setup_transfer = spi_bitbang_setup_transfer;
sp->get_ioc_base = ar71xx_spi_get_ioc_base;
if (pdata) {
sp->bitbang.master->bus_num = pdata->bus_num;
sp->bitbang.master->num_chipselect = pdata->num_chipselect;
if (pdata->get_ioc_base)
sp->get_ioc_base = pdata->get_ioc_base;
} else {
sp->bitbang.master->bus_num = 0;
sp->bitbang.master->num_chipselect = 3;
}
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
ret = -ENOENT;
goto err1;
}
sp->base = ioremap_nocache(r->start, r->end - r->start + 1);
if (!sp->base) {
ret = -ENXIO;
goto err1;
}
ar71xx_spi_setup_regs(sp);
ret = spi_bitbang_start(&sp->bitbang);
if (!ret)
return 0;
ar71xx_spi_restore_regs(sp);
iounmap(sp->base);
err1:
platform_set_drvdata(pdev, NULL);
spi_master_put(sp->bitbang.master);
return ret;
}