[PATCH 04/25] pxa3xx_nand: make scan procedure more clear
Eric Miao
eric.y.miao at gmail.com
Fri Jun 18 02:43:08 EDT 2010
On Fri, Jun 18, 2010 at 1:33 PM, Haojian Zhuang
<haojian.zhuang at gmail.com> wrote:
> From 9023ee9b020ebda0c6ee299807a7fd2eb8fae53d Mon Sep 17 00:00:00 2001
> From: Lei Wen <leiwen at marvell.com>
> Date: Sun, 16 May 2010 17:03:52 +0800
> Subject: [PATCH 04/25] pxa3xx_nand: make scan procedure more clear
>
Looks like a good cleanup to me. The git diff, though, seems to generate poor
differences here.
> Signed-off-by: Lei Wen <leiwen at marvell.com>
> Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
> ---
> drivers/mtd/nand/pxa3xx_nand.c | 88 ++++++++++++++++++++++-----------------
> 1 files changed, 50 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
> index 291610a..1f52701 100644
> --- a/drivers/mtd/nand/pxa3xx_nand.c
> +++ b/drivers/mtd/nand/pxa3xx_nand.c
> @@ -160,6 +160,7 @@ struct pxa3xx_nand_info {
> unsigned int buf_start;
> unsigned int buf_count;
>
> + struct mtd_info *mtd;
> /* DMA information */
> int drcmr_dat;
> int drcmr_cmd;
> @@ -1105,21 +1106,13 @@ static void pxa3xx_nand_init_mtd(struct mtd_info *mtd,
> this->chip_delay = 25;
> }
>
> -static int __devinit pxa3xx_nand_probe(struct platform_device *pdev)
> +static int alloc_nand_resource(struct platform_device *pdev)
> {
> - struct pxa3xx_nand_platform_data *pdata;
> + struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data;
> struct pxa3xx_nand_info *info;
> - struct nand_chip *this;
> struct mtd_info *mtd;
> struct resource *r;
> - int ret = 0, irq;
> -
> - pdata = pdev->dev.platform_data;
> -
> - if (!pdata) {
> - dev_err(&pdev->dev, "no platform data defined\n");
> - return -ENODEV;
> - }
> + int ret, irq;
>
> mtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct pxa3xx_nand_info),
> GFP_KERNEL);
> @@ -1131,8 +1124,8 @@ static int __devinit pxa3xx_nand_probe(struct
> platform_device *pdev)
> info = (struct pxa3xx_nand_info *)(&mtd[1]);
> info->pdev = pdev;
>
> - this = &info->nand_chip;
> mtd->priv = info;
> + info->mtd = mtd;
> mtd->owner = THIS_MODULE;
>
> info->clk = clk_get(&pdev->dev, NULL);
> @@ -1210,27 +1203,9 @@ static int __devinit pxa3xx_nand_probe(struct
> platform_device *pdev)
> }
>
> pxa3xx_nand_init_mtd(mtd, info);
> + platform_set_drvdata(pdev, info);
>
> - platform_set_drvdata(pdev, mtd);
> -
> - if (nand_scan(mtd, 1)) {
> - dev_err(&pdev->dev, "failed to scan nand\n");
> - ret = -ENXIO;
> - goto fail_free_irq;
> - }
> -
> - if (mtd_has_cmdlinepart()) {
> - static const char *probes[] = { "cmdlinepart", NULL };
> - struct mtd_partition *parts;
> - int nr_parts;
> -
> - nr_parts = parse_mtd_partitions(mtd, probes, &parts, 0);
> -
> - if (nr_parts)
> - return add_mtd_partitions(mtd, parts, nr_parts);
> - }
> -
> - return add_mtd_partitions(mtd, pdata->parts, pdata->nr_parts);
> + return 0;
>
> fail_free_irq:
> free_irq(irq, info);
> @@ -1255,8 +1230,8 @@ fail_free_mtd:
>
> static int pxa3xx_nand_remove(struct platform_device *pdev)
> {
> - struct mtd_info *mtd = platform_get_drvdata(pdev);
> - struct pxa3xx_nand_info *info = mtd->priv;
> + struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
> + struct mtd_info *mtd = info->mtd;
> struct resource *r;
> int irq;
>
> @@ -1285,11 +1260,48 @@ static int pxa3xx_nand_remove(struct
> platform_device *pdev)
> return 0;
> }
>
> +static int __devinit pxa3xx_nand_probe(struct platform_device *pdev)
> +{
> + struct pxa3xx_nand_platform_data *pdata;
> + struct pxa3xx_nand_info *info;
> + int ret;
> +
> + pdata = pdev->dev.platform_data;
> + if (!pdata) {
> + dev_err(&pdev->dev, "no platform data defined\n");
> + return -ENODEV;
> + }
> +
> + ret = alloc_nand_resource(pdev);
> + if (ret)
> + return ret;
> +
> + info = platform_get_drvdata(pdev);
> + if (nand_scan(info->mtd, 1)) {
> + dev_err(&pdev->dev, "failed to scan nand\n");
> + pxa3xx_nand_remove(pdev);
> + return -ENODEV;
> + }
> +
> + if (mtd_has_cmdlinepart()) {
> + static const char *probes[] = { "cmdlinepart", NULL };
> + struct mtd_partition *parts;
> + int nr_parts;
> +
> + nr_parts = parse_mtd_partitions(mtd, probes, &parts, 0);
> +
> + if (nr_parts)
> + return add_mtd_partitions(mtd, parts, nr_parts);
> + }
> +
> + return add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
> +}
> +
> #ifdef CONFIG_PM
> static int pxa3xx_nand_suspend(struct platform_device *pdev,
> pm_message_t state)
> {
> - struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev);
> - struct pxa3xx_nand_info *info = mtd->priv;
> + struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
> + struct mtd_info *mtd = info->mtd;
>
> if (info->state != STATE_READY) {
> dev_err(&pdev->dev, "driver busy, state = %d\n", info->state);
> @@ -1301,8 +1313,8 @@ static int pxa3xx_nand_suspend(struct
> platform_device *pdev, pm_message_t state)
>
> static int pxa3xx_nand_resume(struct platform_device *pdev)
> {
> - struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev);
> - struct pxa3xx_nand_info *info = mtd->priv;
> + struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
> + struct mtd_info *mtd = info->mtd;
>
> nand_writel(info, NDTR0CS0, info->ndtr0cs0);
> nand_writel(info, NDTR1CS0, info->ndtr1cs0);
> --
> 1.7.0.4
>
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