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author | Janusz Krzysztofik <jmkrzyszt@gmail.com> | 2018-09-20 00:17:29 +0200 |
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committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2018-10-03 11:12:25 +0200 |
commit | f1a97e0b78e378f43660930474113387a2af2aa3 (patch) | |
tree | 3b8f40dedd316c37922b000b3b65f73f79cb03a7 /drivers/mtd | |
parent | fbed20280d912449cfb40c382cb55e3d11502587 (diff) | |
download | linux-stable-f1a97e0b78e378f43660930474113387a2af2aa3.tar.gz linux-stable-f1a97e0b78e378f43660930474113387a2af2aa3.tar.bz2 linux-stable-f1a97e0b78e378f43660930474113387a2af2aa3.zip |
mtd: rawnand: ams-delta: use GPIO lookup table
Now as Amstrad Delta board - the only user of this driver - provides
GPIO lookup tables, switch from GPIO numbers to GPIO descriptors and
use the table to locate required GPIO pins.
Declare static variables for storing GPIO descriptors and replace
gpio_ function calls with their gpiod_ equivalents.
Pin naming used by the driver should be followed while respective GPIO
lookup table is initialized by a board init code.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r-- | drivers/mtd/nand/raw/ams-delta.c | 126 |
1 files changed, 67 insertions, 59 deletions
diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c index 3d3786dcc5d1..a2d2dfc55984 100644 --- a/drivers/mtd/nand/raw/ams-delta.c +++ b/drivers/mtd/nand/raw/ams-delta.c @@ -20,23 +20,28 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/mtd/mtd.h> #include <linux/mtd/rawnand.h> #include <linux/mtd/partitions.h> -#include <linux/gpio.h> #include <linux/platform_data/gpio-omap.h> #include <asm/io.h> #include <asm/sizes.h> -#include <mach/board-ams-delta.h> - #include <mach/hardware.h> /* * MTD structure for E3 (Delta) */ static struct mtd_info *ams_delta_mtd = NULL; +static struct gpio_desc *gpiod_rdy; +static struct gpio_desc *gpiod_nce; +static struct gpio_desc *gpiod_nre; +static struct gpio_desc *gpiod_nwp; +static struct gpio_desc *gpiod_nwe; +static struct gpio_desc *gpiod_ale; +static struct gpio_desc *gpiod_cle; /* * Define partitions for flash devices @@ -69,9 +74,9 @@ static void ams_delta_write_byte(struct nand_chip *this, u_char byte) writew(0, io_base + OMAP_MPUIO_IO_CNTL); writew(byte, this->legacy.IO_ADDR_W); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NWE, 0); + gpiod_set_value(gpiod_nwe, 0); ndelay(40); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NWE, 1); + gpiod_set_value(gpiod_nwe, 1); } static u_char ams_delta_read_byte(struct nand_chip *this) @@ -79,11 +84,11 @@ static u_char ams_delta_read_byte(struct nand_chip *this) u_char res; void __iomem *io_base = (void __iomem *)nand_get_controller_data(this); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NRE, 0); + gpiod_set_value(gpiod_nre, 0); ndelay(40); writew(~0, io_base + OMAP_MPUIO_IO_CNTL); res = readw(this->legacy.IO_ADDR_R); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NRE, 1); + gpiod_set_value(gpiod_nre, 1); return res; } @@ -118,12 +123,9 @@ static void ams_delta_hwcontrol(struct nand_chip *this, int cmd, { if (ctrl & NAND_CTRL_CHANGE) { - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_NCE, - (ctrl & NAND_NCE) == 0); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_CLE, - (ctrl & NAND_CLE) != 0); - gpio_set_value(AMS_DELTA_GPIO_PIN_NAND_ALE, - (ctrl & NAND_ALE) != 0); + gpiod_set_value(gpiod_nce, !(ctrl & NAND_NCE)); + gpiod_set_value(gpiod_cle, !!(ctrl & NAND_CLE)); + gpiod_set_value(gpiod_ale, !!(ctrl & NAND_ALE)); } if (cmd != NAND_CMD_NONE) @@ -132,41 +134,9 @@ static void ams_delta_hwcontrol(struct nand_chip *this, int cmd, static int ams_delta_nand_ready(struct nand_chip *this) { - return gpio_get_value(AMS_DELTA_GPIO_PIN_NAND_RB); + return gpiod_get_value(gpiod_rdy); } -static const struct gpio _mandatory_gpio[] = { - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NCE, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nce", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NRE, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nre", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NWP, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nwp", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_NWE, - .flags = GPIOF_OUT_INIT_HIGH, - .label = "nand_nwe", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_ALE, - .flags = GPIOF_OUT_INIT_LOW, - .label = "nand_ale", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_NAND_CLE, - .flags = GPIOF_OUT_INIT_LOW, - .label = "nand_cle", - }, -}; /* * Main initialization routine @@ -214,12 +184,17 @@ static int ams_delta_init(struct platform_device *pdev) this->legacy.write_buf = ams_delta_write_buf; this->legacy.read_buf = ams_delta_read_buf; this->legacy.cmd_ctrl = ams_delta_hwcontrol; - if (gpio_request(AMS_DELTA_GPIO_PIN_NAND_RB, "nand_rdy") == 0) { - this->legacy.dev_ready = ams_delta_nand_ready; - } else { - this->legacy.dev_ready = NULL; - pr_notice("Couldn't request gpio for Delta NAND ready.\n"); + + gpiod_rdy = devm_gpiod_get_optional(&pdev->dev, "rdy", GPIOD_IN); + if (IS_ERR(gpiod_rdy)) { + err = PTR_ERR(gpiod_rdy); + dev_warn(&pdev->dev, "RDY GPIO request failed (%d)\n", err); + goto out_mtd; } + + if (gpiod_rdy) + this->legacy.dev_ready = ams_delta_nand_ready; + /* 25 us command delay time */ this->legacy.chip_delay = 30; this->ecc.mode = NAND_ECC_SOFT; @@ -228,9 +203,47 @@ static int ams_delta_init(struct platform_device *pdev) platform_set_drvdata(pdev, io_base); /* Set chip enabled, but */ - err = gpio_request_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); - if (err) - goto out_gpio; + gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nwp)) { + err = PTR_ERR(gpiod_nwp); + dev_err(&pdev->dev, "NWP GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nce)) { + err = PTR_ERR(gpiod_nce); + dev_err(&pdev->dev, "NCE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nre)) { + err = PTR_ERR(gpiod_nre); + dev_err(&pdev->dev, "NRE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod_nwe)) { + err = PTR_ERR(gpiod_nwe); + dev_err(&pdev->dev, "NWE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_ale = devm_gpiod_get(&pdev->dev, "ale", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_ale)) { + err = PTR_ERR(gpiod_ale); + dev_err(&pdev->dev, "ALE GPIO request failed (%d)\n", err); + goto out_mtd; + } + + gpiod_cle = devm_gpiod_get(&pdev->dev, "cle", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_cle)) { + err = PTR_ERR(gpiod_cle); + dev_err(&pdev->dev, "CLE GPIO request failed (%d)\n", err); + goto out_mtd; + } /* Scan to find existence of the device */ err = nand_scan(this, 1); @@ -244,9 +257,6 @@ static int ams_delta_init(struct platform_device *pdev) goto out; out_mtd: - gpio_free_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); -out_gpio: - gpio_free(AMS_DELTA_GPIO_PIN_NAND_RB); iounmap(io_base); out_free: kfree(this); @@ -264,8 +274,6 @@ static int ams_delta_cleanup(struct platform_device *pdev) /* Release resources, unregister device */ nand_release(mtd_to_nand(ams_delta_mtd)); - gpio_free_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); - gpio_free(AMS_DELTA_GPIO_PIN_NAND_RB); iounmap(io_base); /* Free the MTD device structure */ |