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author | Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2018-10-04 15:01:08 +0200 |
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committer | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-10-08 21:32:58 +0200 |
commit | 299b43535d3895bcde93cc7310b95b92b4fd8129 (patch) | |
tree | 603b46b071e9bd8dcd35b1e5548581433f9894f8 /drivers/mtd/maps/gpio-addr-flash.c | |
parent | 0304f8eaa3aebc0480787139a26c7a19ac9936bd (diff) | |
download | blackbird-obmc-linux-299b43535d3895bcde93cc7310b95b92b4fd8129.tar.gz blackbird-obmc-linux-299b43535d3895bcde93cc7310b95b92b4fd8129.zip |
mtd: maps: gpio-addr-flash: Convert to gpiod
Convert from legacy gpio API to gpiod.
Board files will have to use gpiod_lookup_tables.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Diffstat (limited to 'drivers/mtd/maps/gpio-addr-flash.c')
-rw-r--r-- | drivers/mtd/maps/gpio-addr-flash.c | 55 |
1 files changed, 21 insertions, 34 deletions
diff --git a/drivers/mtd/maps/gpio-addr-flash.c b/drivers/mtd/maps/gpio-addr-flash.c index 47b12a6fead4..a20e85aa770e 100644 --- a/drivers/mtd/maps/gpio-addr-flash.c +++ b/drivers/mtd/maps/gpio-addr-flash.c @@ -14,6 +14,7 @@ */ #include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> @@ -33,16 +34,14 @@ * struct async_state - keep GPIO flash state * @mtd: MTD state for this mapping * @map: MTD map state for this flash - * @gpio_count: number of GPIOs used to address - * @gpio_addrs: array of GPIOs to twiddle + * @gpios: Struct containing the array of GPIO descriptors * @gpio_values: cached GPIO values * @win_order: dedicated memory size (if no GPIOs) */ struct async_state { struct mtd_info *mtd; struct map_info map; - size_t gpio_count; - unsigned *gpio_addrs; + struct gpio_descs *gpios; unsigned int gpio_values; unsigned int win_order; }; @@ -66,11 +65,11 @@ static void gf_set_gpios(struct async_state *state, unsigned long ofs) if (ofs == state->gpio_values) return; - for (i = 0; i < state->gpio_count; i++) { + for (i = 0; i < state->gpios->ndescs; i++) { if ((ofs & BIT(i)) == (state->gpio_values & BIT(i))) continue; - gpio_set_value(state->gpio_addrs[i], !!(ofs & BIT(i))); + gpiod_set_value(state->gpios->desc[i], !!(ofs & BIT(i))); } state->gpio_values = ofs; @@ -182,18 +181,22 @@ static const char * const part_probe_types[] = { * The platform resource layout expected looks something like: * struct mtd_partition partitions[] = { ... }; * struct physmap_flash_data flash_data = { ... }; - * unsigned flash_gpios[] = { GPIO_XX, GPIO_XX, ... }; + * static struct gpiod_lookup_table addr_flash_gpios = { + * .dev_id = "gpio-addr-flash.0", + * .table = { + * GPIO_LOOKUP_IDX("gpio.0", 15, "addr", 0, GPIO_ACTIVE_HIGH), + * GPIO_LOOKUP_IDX("gpio.0", 16, "addr", 1, GPIO_ACTIVE_HIGH), + * ); + * }; + * gpiod_add_lookup_table(&addr_flash_gpios); + * * struct resource flash_resource[] = { * { * .name = "cfi_probe", * .start = 0x20000000, * .end = 0x201fffff, * .flags = IORESOURCE_MEM, - * }, { - * .start = (unsigned long)flash_gpios, - * .end = ARRAY_SIZE(flash_gpios), - * .flags = IORESOURCE_IRQ, - * } + * }, * }; * struct platform_device flash_device = { * .name = "gpio-addr-flash", @@ -205,29 +208,24 @@ static const char * const part_probe_types[] = { */ static int gpio_flash_probe(struct platform_device *pdev) { - size_t i; struct physmap_flash_data *pdata; struct resource *memory; - struct resource *gpios; struct async_state *state; pdata = dev_get_platdata(&pdev->dev); memory = platform_get_resource(pdev, IORESOURCE_MEM, 0); - gpios = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!memory || !gpios || !gpios->end) + if (!memory) return -EINVAL; state = devm_kzalloc(&pdev->dev, sizeof(*state), GFP_KERNEL); if (!state) return -ENOMEM; - /* - * We cast start/end to known types in the boards file, so cast - * away their pointer types here to the known types (gpios->xxx). - */ - state->gpio_count = gpios->end; - state->gpio_addrs = (void *)(unsigned long)gpios->start; + state->gpios = devm_gpiod_get_array(&pdev->dev, "addr", GPIOD_OUT_LOW); + if (IS_ERR(state->gpios)) + return PTR_ERR(state->gpios); + state->win_order = get_bitmask_order(resource_size(memory)) - 1; state->map.name = DRIVER_NAME; @@ -236,7 +234,7 @@ static int gpio_flash_probe(struct platform_device *pdev) state->map.write = gf_write; state->map.copy_to = gf_copy_to; state->map.bankwidth = pdata->width; - state->map.size = BIT(state->win_order + state->gpio_count); + state->map.size = BIT(state->win_order + state->gpios->ndescs); state->map.virt = devm_ioremap_resource(&pdev->dev, memory); if (IS_ERR(state->map.virt)) return PTR_ERR(state->map.virt); @@ -246,17 +244,6 @@ static int gpio_flash_probe(struct platform_device *pdev) platform_set_drvdata(pdev, state); - i = 0; - do { - if (devm_gpio_request(&pdev->dev, state->gpio_addrs[i], - DRIVER_NAME)) { - dev_err(&pdev->dev, "failed to request gpio %d\n", - state->gpio_addrs[i]); - return -EBUSY; - } - gpio_direction_output(state->gpio_addrs[i], 0); - } while (++i < state->gpio_count); - dev_notice(&pdev->dev, "probing %d-bit flash bus\n", state->map.bankwidth * 8); state->mtd = do_map_probe(memory->name, &state->map); |