From 18afbc54c4944b6c93f3888d97db0d1257a4b5e9 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Wed, 17 Oct 2012 10:08:27 +0400 Subject: [PATCH] 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 Signed-off-by: Artem Bityutskiy --- drivers/mtd/nand/gpio.c | 22 +++++++++++++++------- 1 file 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: -- 2.20.1