Commit 18afbc54 authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Artem Bityutskiy

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: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
parent 74830966
......@@ -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);
if (gpio_is_valid(gpiomtd->plat.gpio_rdy))
return gpio_get_value(gpiomtd->plat.gpio_rdy);
return 1;
}
#ifdef CONFIG_OF
......@@ -252,6 +256,7 @@ 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);
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);
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;
......@@ -386,6 +393,7 @@ 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);
if (gpio_is_valid(gpiomtd->plat.gpio_rdy))
gpio_free(gpiomtd->plat.gpio_rdy);
err_rdy:
gpio_free(gpiomtd->plat.gpio_cle);
......
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