On Mon, Sep 03, 2012 at 01:45:57PM +0200, Jan Luebbe wrote:
> Signed-off-by: Jan Luebbe <jlu@xxxxxxxxxxxxxx>
> ---
> drivers/nor/m25p80.c | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/drivers/nor/m25p80.c b/drivers/nor/m25p80.c
> index 61f2195..1722e0a 100644
> --- a/drivers/nor/m25p80.c
> +++ b/drivers/nor/m25p80.c
> @@ -20,6 +20,7 @@
> #include <common.h>
> #include <init.h>
> #include <driver.h>
> +#include <ioctl.h>
> #include <spi/spi.h>
> #include <spi/flash.h>
> #include <xfuncs.h>
> @@ -690,9 +691,34 @@ static const struct spi_device_id *jedec_probe(struct spi_device *spi)
> return NULL;
> }
>
> +static int m25p80_ioctl(struct cdev *cdev, int request, void *buf)
> +{
> + struct m25p *flash = cdev->priv;
> + struct flash_info *info = flash->info;
> + struct mtd_info_user *user = buf;
> +
> + switch (request) {
> + case MEMGETINFO:
> + memset(user, 0, sizeof(*user));
> + user->type = MTD_NORFLASH;
> + user->flags = MTD_CAP_NORFLASH;
> + user->size = flash->size;
> + user->erasesize = info->sector_size;
> + user->writesize = 1;
> + user->oobsize = 0;
> + /* The below fields are obsolete */
> + user->ecctype = -1;
> + user->eccsize = 0;
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +
> static struct file_operations m25p80_ops = {
> .read = m25p80_read,
> .write = m25p80_write,
> + .ioctl = m25p80_ioctl,
Rather than doing this you should simply fill in cdev->mtd. See how the
cfi flash driver does this. Then it will also work for partitions on a
m25p80.
Sascha
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