Re: [PATCH 5/6 V2] atmel/nand: add DT support

Nicolas Ferre
2012-02-07T10:30:35Z

On 02/06/2012 11:35 AM, Jean-Christophe PLAGNIOL-VILLARD :
> use a local copy of board informatin and fill with DT data
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>
> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
> Cc: devicetree-discuss@lists.ozlabs.org
> Cc: linux-mtd@lists.infradead.org

[..]

> +static int __devinit atmel_of_init_port(struct atmel_nand_host *host,
> + struct device_node *np)

Maybe you will need to protect this function in case of !DT builds: I
suspect that some of the of_xxxxx() calls are not provided if !CONFIG_OF.

> +{
> + u32 val;
> + int ecc_mode;
> + struct atmel_nand_data *board = &host->board;
> + enum of_gpio_flags flags;
> +
> + if (of_property_read_u32(np, "atmel,nand-addr-offset", &val) == 0) {
> + if (val >= 32) {
> + dev_err(host->dev, "invalid addr-offset %u\n", val);
> + return -EINVAL;
> + }
> + board->ale = val;
> + }
> +
> + if (of_property_read_u32(np, "atmel,nand-cmd-offset", &val) == 0) {
> + if (val >= 32) {
> + dev_err(host->dev, "invalid cmd-offset %u\n", val);
> + return -EINVAL;
> + }
> + board->cle = val;
> + }
> +
> + ecc_mode = of_get_nand_ecc_mode(np);
> +
> + board->ecc_mode = ecc_mode < 0 ? NAND_ECC_SOFT : ecc_mode;
> +
> + board->on_flash_bbt = of_get_nand_on_flash_bbt(np);
> +
> + if (of_get_nand_bus_width(np) == 16)
> + board->bus_width_16 = 1;
> +
> + board->rdy_pin = of_get_gpio_flags(np, 0, &flags);
> + board->rdy_pin_active_low = (flags == OF_GPIO_ACTIVE_LOW);
> +
> + board->enable_pin = of_get_gpio(np, 1);
> + board->det_pin = of_get_gpio(np, 2);
> +
> + return 0;
> +}
> +
> /*
> * Probe for the NAND device.
> */
> @@ -479,6 +525,7 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
> struct nand_chip *nand_chip;
> struct resource *regs;
> struct resource *mem;
> + struct mtd_part_parser_data ppdata = {};
> int res;
>
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> @@ -505,8 +552,15 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
>
> mtd = &host->mtd;
> nand_chip = &host->nand_chip;
> - host->board = pdev->dev.platform_data;
> host->dev = &pdev->dev;
> + if (pdev->dev.of_node) {
> + res = atmel_of_init_port(host, pdev->dev.of_node);

Called here: must compile with !CONFIG_OF

> + if (res)
> + goto err_nand_ioremap;
> + } else {
> + memcpy(&host->board, pdev->dev.platform_data,
> + sizeof(struct atmel_nand_data));
> + }
>
> nand_chip->priv = host; /* link the private data structures */
> mtd->priv = nand_chip;

Best regards,
--
Nicolas Ferre