diff options
| author | Alexander Shiyan <shc_work@mail.ru> | 2012-10-17 08:08:27 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-11-15 14:37:50 +0100 |
| commit | 18afbc54c4944b6c93f3888d97db0d1257a4b5e9 (patch) | |
| tree | 4d619de5e0d0e9d30bdf3a975c082ac24dc40131 /drivers/mtd/nand/gpio.c | |
| parent | mtd: use the NAND_STATUS_FAIL to replace the hardcode (diff) | |
| download | linux-18afbc54c4944b6c93f3888d97db0d1257a4b5e9.tar.xz linux-18afbc54c4944b6c93f3888d97db0d1257a4b5e9.zip | |
mtd: gpio-nand: Ability to use driver for configurations without RDY-pin
In some configurations of "gpio-nand" RDY-pin may be not connected.
This patch allow to use driver for these configurations. In this case
we are assume that device always ready.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/nand/gpio.c')
| -rw-r--r-- | drivers/mtd/nand/gpio.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/mtd/nand/gpio.c b/drivers/mtd/nand/gpio.c index bc73bc5f2713..0b3c815ef80c 100644 --- a/drivers/mtd/nand/gpio.c +++ b/drivers/mtd/nand/gpio.c @@ -134,7 +134,11 @@ static void gpio_nand_readbuf16(struct mtd_info *mtd, u_char *buf, int len) static int gpio_nand_devready(struct mtd_info *mtd) { struct gpiomtd *gpiomtd = gpio_nand_getpriv(mtd); - return gpio_get_value(gpiomtd->plat.gpio_rdy); + + if (gpio_is_valid(gpiomtd->plat.gpio_rdy)) + return gpio_get_value(gpiomtd->plat.gpio_rdy); + + return 1; } #ifdef CONFIG_OF @@ -252,7 +256,8 @@ static int __devexit gpio_nand_remove(struct platform_device *dev) gpio_free(gpiomtd->plat.gpio_nce); if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) gpio_free(gpiomtd->plat.gpio_nwp); - gpio_free(gpiomtd->plat.gpio_rdy); + if (gpio_is_valid(gpiomtd->plat.gpio_rdy)) + gpio_free(gpiomtd->plat.gpio_rdy); kfree(gpiomtd); @@ -336,10 +341,12 @@ static int __devinit gpio_nand_probe(struct platform_device *dev) if (ret) goto err_cle; gpio_direction_output(gpiomtd->plat.gpio_cle, 0); - ret = gpio_request(gpiomtd->plat.gpio_rdy, "NAND RDY"); - if (ret) - goto err_rdy; - gpio_direction_input(gpiomtd->plat.gpio_rdy); + if (gpio_is_valid(gpiomtd->plat.gpio_rdy)) { + ret = gpio_request(gpiomtd->plat.gpio_rdy, "NAND RDY"); + if (ret) + goto err_rdy; + gpio_direction_input(gpiomtd->plat.gpio_rdy); + } this->IO_ADDR_W = this->IO_ADDR_R; @@ -386,7 +393,8 @@ static int __devinit gpio_nand_probe(struct platform_device *dev) err_wp: if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) gpio_set_value(gpiomtd->plat.gpio_nwp, 0); - gpio_free(gpiomtd->plat.gpio_rdy); + if (gpio_is_valid(gpiomtd->plat.gpio_rdy)) + gpio_free(gpiomtd->plat.gpio_rdy); err_rdy: gpio_free(gpiomtd->plat.gpio_cle); err_cle: |