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mtd: gpio-nand: Ability to use driver for configurations without RDY-pin

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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>
This commit is contained in:
Alexander Shiyan 2012-10-17 10:08:27 +04:00 committed by Artem Bityutskiy
parent 7483096665
commit 18afbc54c4
1 changed files with 15 additions and 7 deletions
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22
drivers/mtd/nand/gpio.c
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@ -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) static int gpio_nand_devready(struct mtd_info *mtd)
{ {
struct gpiomtd *gpiomtd = gpio_nand_getpriv(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 #ifdef CONFIG_OF
@ -252,7 +256,8 @@ static int __devexit gpio_nand_remove(struct platform_device *dev)
gpio_free(gpiomtd->plat.gpio_nce); gpio_free(gpiomtd->plat.gpio_nce);
if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) if (gpio_is_valid(gpiomtd->plat.gpio_nwp))
gpio_free(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); kfree(gpiomtd);
@ -336,10 +341,12 @@ static int __devinit gpio_nand_probe(struct platform_device *dev)
if (ret) if (ret)
goto err_cle; goto err_cle;
gpio_direction_output(gpiomtd->plat.gpio_cle, 0); gpio_direction_output(gpiomtd->plat.gpio_cle, 0);
ret = gpio_request(gpiomtd->plat.gpio_rdy, "NAND RDY"); if (gpio_is_valid(gpiomtd->plat.gpio_rdy)) {
if (ret) ret = gpio_request(gpiomtd->plat.gpio_rdy, "NAND RDY");
goto err_rdy; if (ret)
gpio_direction_input(gpiomtd->plat.gpio_rdy); goto err_rdy;
gpio_direction_input(gpiomtd->plat.gpio_rdy);
}
this->IO_ADDR_W = this->IO_ADDR_R; this->IO_ADDR_W = this->IO_ADDR_R;
@ -386,7 +393,8 @@ static int __devinit gpio_nand_probe(struct platform_device *dev)
err_wp: err_wp:
if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) if (gpio_is_valid(gpiomtd->plat.gpio_nwp))
gpio_set_value(gpiomtd->plat.gpio_nwp, 0); 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: err_rdy:
gpio_free(gpiomtd->plat.gpio_cle); gpio_free(gpiomtd->plat.gpio_cle);
err_cle: err_cle: