diff options
| author | Janusz Krzysztofik <jmkrzyszt@gmail.com> | 2020-02-12 03:39:21 +0300 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2020-03-09 16:51:01 +0300 |
| commit | 241008ed0bb5955e52e06d7270e87c974bbaadd6 (patch) | |
| tree | 3d25a052e996b45fc8de003acdd6c07170d047aa /drivers/mtd/nand/raw/ams-delta.c | |
| parent | 2cef3d4cf4498e260f5bc2d5fab850e4a52be382 (diff) | |
| download | linux-241008ed0bb5955e52e06d7270e87c974bbaadd6.tar.xz | |
mtd: rawnand: ams-delta: Push inversion handling to gpiolib
Let platforms take care of declaring correct GPIO pin polarity so we
can just ask a GPIO line to be asserted or deasserted and gpiolib deals
with the rest depending on how the platform is configured.
Inspired by similar changes to regulator drivers by Linus Walleij
<linus.walleij@linaro.org>, thanks!
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200212003929.6682-7-jmkrzyszt@gmail.com
Diffstat (limited to 'drivers/mtd/nand/raw/ams-delta.c')
| -rw-r--r-- | drivers/mtd/nand/raw/ams-delta.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c index fb96f6a3b0b3..c7aeb940accd 100644 --- a/drivers/mtd/nand/raw/ams-delta.c +++ b/drivers/mtd/nand/raw/ams-delta.c @@ -44,9 +44,9 @@ struct ams_delta_nand { static void ams_delta_write_commit(struct ams_delta_nand *priv) { - gpiod_set_value(priv->gpiod_nwe, 0); - ndelay(40); gpiod_set_value(priv->gpiod_nwe, 1); + ndelay(40); + gpiod_set_value(priv->gpiod_nwe, 0); } static void ams_delta_io_write(struct ams_delta_nand *priv, u8 byte) @@ -81,13 +81,13 @@ static u8 ams_delta_io_read(struct ams_delta_nand *priv) struct gpio_descs *data_gpiods = priv->data_gpiods; DECLARE_BITMAP(values, BITS_PER_TYPE(res)) = { 0, }; - gpiod_set_value(priv->gpiod_nre, 0); + gpiod_set_value(priv->gpiod_nre, 1); ndelay(40); gpiod_get_raw_array_value(data_gpiods->ndescs, data_gpiods->desc, data_gpiods->info, values); - gpiod_set_value(priv->gpiod_nre, 1); + gpiod_set_value(priv->gpiod_nre, 0); res = values[0]; return res; @@ -129,7 +129,7 @@ static void ams_delta_read_buf(struct ams_delta_nand *priv, u8 *buf, int len) static void ams_delta_ctrl_cs(struct ams_delta_nand *priv, bool assert) { - gpiod_set_value(priv->gpiod_nce, assert ? 0 : 1); + gpiod_set_value(priv->gpiod_nce, assert); } static int ams_delta_exec_op(struct nand_chip *this, @@ -237,28 +237,28 @@ static int ams_delta_init(struct platform_device *pdev) platform_set_drvdata(pdev, priv); /* Set chip enabled but write protected */ - priv->gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_LOW); + priv->gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH); if (IS_ERR(priv->gpiod_nwp)) { err = PTR_ERR(priv->gpiod_nwp); dev_err(&pdev->dev, "NWP GPIO request failed (%d)\n", err); return err; } - priv->gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_HIGH); + priv->gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_LOW); if (IS_ERR(priv->gpiod_nce)) { err = PTR_ERR(priv->gpiod_nce); dev_err(&pdev->dev, "NCE GPIO request failed (%d)\n", err); return err; } - priv->gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_HIGH); + priv->gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_LOW); if (IS_ERR(priv->gpiod_nre)) { err = PTR_ERR(priv->gpiod_nre); dev_err(&pdev->dev, "NRE GPIO request failed (%d)\n", err); return err; } - priv->gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_HIGH); + priv->gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_LOW); if (IS_ERR(priv->gpiod_nwe)) { err = PTR_ERR(priv->gpiod_nwe); dev_err(&pdev->dev, "NWE GPIO request failed (%d)\n", err); @@ -303,7 +303,7 @@ static int ams_delta_init(struct platform_device *pdev) * chip detection/initialization. */ /* Release write protection */ - gpiod_set_value(priv->gpiod_nwp, 1); + gpiod_set_value(priv->gpiod_nwp, 0); /* Scan to find existence of the device */ err = nand_scan(this, 1); @@ -332,7 +332,7 @@ static int ams_delta_cleanup(struct platform_device *pdev) struct mtd_info *mtd = nand_to_mtd(&priv->nand_chip); /* Apply write protection */ - gpiod_set_value(priv->gpiod_nwp, 0); + gpiod_set_value(priv->gpiod_nwp, 1); /* Unregister device */ nand_release(mtd_to_nand(mtd)); |