@@ -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:
In some hardware 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 NAND device always ready. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> --- drivers/mtd/nand/gpio.c | 22 +++++++++++++++------- 1 files changed, 15 insertions(+), 7 deletions(-)