diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2017-05-18 10:19:33 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2017-05-18 10:19:33 -0600 |
| commit | a1a9af4e9d9ec65c22d3cfe449e0420d17dbedba (patch) | |
| tree | 05bd08bb1987aa92b84b49b9ee4eee0ba3b2917f /drivers/mtd/nand/gpio.c | |
| parent | 25a0da73f24c95d57381bedd9cd89e4929b1bfde (diff) | |
| parent | 2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff) | |
Merge tag 'v4.12-rc1' into docs-next
Linux 4.12-rc1
Diffstat (limited to 'drivers/mtd/nand/gpio.c')
| -rw-r--r-- | drivers/mtd/nand/gpio.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/mtd/nand/gpio.c b/drivers/mtd/nand/gpio.c index 0d24857469ab..85294f150f4f 100644 --- a/drivers/mtd/nand/gpio.c +++ b/drivers/mtd/nand/gpio.c @@ -78,7 +78,9 @@ static void gpio_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) gpio_nand_dosync(gpiomtd); if (ctrl & NAND_CTRL_CHANGE) { - gpio_set_value(gpiomtd->plat.gpio_nce, !(ctrl & NAND_NCE)); + if (gpio_is_valid(gpiomtd->plat.gpio_nce)) + gpio_set_value(gpiomtd->plat.gpio_nce, + !(ctrl & NAND_NCE)); gpio_set_value(gpiomtd->plat.gpio_cle, !!(ctrl & NAND_CLE)); gpio_set_value(gpiomtd->plat.gpio_ale, !!(ctrl & NAND_ALE)); gpio_nand_dosync(gpiomtd); @@ -201,7 +203,8 @@ static int gpio_nand_remove(struct platform_device *pdev) if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) gpio_set_value(gpiomtd->plat.gpio_nwp, 0); - gpio_set_value(gpiomtd->plat.gpio_nce, 1); + if (gpio_is_valid(gpiomtd->plat.gpio_nce)) + gpio_set_value(gpiomtd->plat.gpio_nce, 1); return 0; } @@ -239,10 +242,13 @@ static int gpio_nand_probe(struct platform_device *pdev) if (ret) return ret; - ret = devm_gpio_request(&pdev->dev, gpiomtd->plat.gpio_nce, "NAND NCE"); - if (ret) - return ret; - gpio_direction_output(gpiomtd->plat.gpio_nce, 1); + if (gpio_is_valid(gpiomtd->plat.gpio_nce)) { + ret = devm_gpio_request(&pdev->dev, gpiomtd->plat.gpio_nce, + "NAND NCE"); + if (ret) + return ret; + gpio_direction_output(gpiomtd->plat.gpio_nce, 1); + } if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) { ret = devm_gpio_request(&pdev->dev, gpiomtd->plat.gpio_nwp, |