[PATCH v2]: NUC900: Add spi driver support for nuc900

[Li Jie]

On Fri, Nov 20, 2009 at 1:26 PM, Wan ZongShun <mcuos.com at gmail.com> wrote:
>
> +static void w90p910_init_spi(struct w90p910_spi *hw)
> +{
> +       clk_enable(hw->clk);
> +       spin_lock_init(&hw->lock);
> +
> +       w90p910_tx_edge(hw, hw->pdata->txneg);
> +       w90p910_rx_edge(hw, hw->pdata->rxneg);
> +       w90p910_send_first(hw, hw->pdata->lsb);
> +       w90p910_set_sleep(hw, hw->pdata->sleep);
> +       w90p910_spi_setup_txbitlen(hw, hw->pdata->txbitlen);
> +       w90p910_spi_setup_txnum(hw, hw->pdata->txnum);
> +       w90p910_set_divider(hw);
> +       w90p910_enable_int(hw, 1);
> +}
> +
> +static int __devinit w90p910_spi_probe(struct platform_device *pdev)
> +{
> +       struct w90p910_spi *hw;
> +       struct spi_master *master;
> +       struct resource *res;
> +       int err = 0;
> +
> +       master = spi_alloc_master(&pdev->dev, sizeof(struct w90p910_spi));
> +       if (master == NULL) {
> +               dev_err(&pdev->dev, "No memory for spi_master\n");
> +               err = -ENOMEM;
> +               goto err_nomem;
> +       }
> +
> +       hw = spi_master_get_devdata(master);
> +       memset(hw, 0, sizeof(struct w90p910_spi));
> +
> +       hw->master = spi_master_get(master);
> +       hw->pdata  = pdev->dev.platform_data;

Seems that platform_data is necessary in your driver,
but I found it is not initialized in mach-w90x900/dev.c:

static struct platform_device nuc900_device_spi = {
	.name		= "nuc900-spi",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(nuc900_spi_resource),
	.resource	= nuc900_spi_resource,
};

-- 
Regards
Li Jie