diff options
Diffstat (limited to 'drivers/gpio/atmel_pio4.c')
| -rw-r--r-- | drivers/gpio/atmel_pio4.c | 138 |
1 files changed, 116 insertions, 22 deletions
diff --git a/drivers/gpio/atmel_pio4.c b/drivers/gpio/atmel_pio4.c index 84e8cc5fe8..7adea88565 100644 --- a/drivers/gpio/atmel_pio4.c +++ b/drivers/gpio/atmel_pio4.c @@ -7,11 +7,17 @@ * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> +#include <clk.h> #include <dm.h> +#include <fdtdec.h> +#include <dm/root.h> #include <asm/arch/hardware.h> +#include <asm/gpio.h> #include <mach/gpio.h> #include <mach/atmel_pio4.h> +DECLARE_GLOBAL_DATA_PTR; + static struct atmel_pio4_port *atmel_pio4_port_base(u32 port) { struct atmel_pio4_port *base = NULL; @@ -165,15 +171,37 @@ int atmel_pio4_get_pio_input(u32 port, u32 pin) } #ifdef CONFIG_DM_GPIO + +struct atmel_pioctrl_data { + u32 nbanks; +}; + +struct atmel_pio4_platdata { + struct atmel_pio4_port *reg_base; +}; + +static struct atmel_pio4_port *atmel_pio4_bank_base(struct udevice *dev, + u32 bank) +{ + struct atmel_pio4_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_port *port_base = + (struct atmel_pio4_port *)((u32)plat->reg_base + + ATMEL_PIO_BANK_OFFSET * bank); + + return port_base; +} + static int atmel_pio4_direction_input(struct udevice *dev, unsigned offset) { - struct at91_port_platdata *plat = dev_get_platdata(dev); - struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; - u32 mask = 0x01 << offset; - u32 reg = ATMEL_PIO_CFGR_FUNC_GPIO; + u32 bank = ATMEL_PIO_BANK(offset); + u32 line = ATMEL_PIO_LINE(offset); + struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank); + u32 mask = BIT(line); writel(mask, &port_base->mskr); - writel(reg, &port_base->cfgr); + + clrbits_le32(&port_base->cfgr, + ATMEL_PIO_CFGR_FUNC_MASK | ATMEL_PIO_DIR_MASK); return 0; } @@ -181,13 +209,15 @@ static int atmel_pio4_direction_input(struct udevice *dev, unsigned offset) static int atmel_pio4_direction_output(struct udevice *dev, unsigned offset, int value) { - struct at91_port_platdata *plat = dev_get_platdata(dev); - struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; - u32 mask = 0x01 << offset; - u32 reg = ATMEL_PIO_CFGR_FUNC_GPIO | ATMEL_PIO_DIR_MASK; + u32 bank = ATMEL_PIO_BANK(offset); + u32 line = ATMEL_PIO_LINE(offset); + struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank); + u32 mask = BIT(line); writel(mask, &port_base->mskr); - writel(reg, &port_base->cfgr); + + clrsetbits_le32(&port_base->cfgr, + ATMEL_PIO_CFGR_FUNC_MASK, ATMEL_PIO_DIR_MASK); if (value) writel(mask, &port_base->sodr); @@ -199,9 +229,10 @@ static int atmel_pio4_direction_output(struct udevice *dev, static int atmel_pio4_get_value(struct udevice *dev, unsigned offset) { - struct at91_port_platdata *plat = dev_get_platdata(dev); - struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; - u32 mask = 0x01 << offset; + u32 bank = ATMEL_PIO_BANK(offset); + u32 line = ATMEL_PIO_LINE(offset); + struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank); + u32 mask = BIT(line); return (readl(&port_base->pdsr) & mask) ? 1 : 0; } @@ -209,9 +240,10 @@ static int atmel_pio4_get_value(struct udevice *dev, unsigned offset) static int atmel_pio4_set_value(struct udevice *dev, unsigned offset, int value) { - struct at91_port_platdata *plat = dev_get_platdata(dev); - struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; - u32 mask = 0x01 << offset; + u32 bank = ATMEL_PIO_BANK(offset); + u32 line = ATMEL_PIO_LINE(offset); + struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank); + u32 mask = BIT(line); if (value) writel(mask, &port_base->sodr); @@ -223,9 +255,10 @@ static int atmel_pio4_set_value(struct udevice *dev, static int atmel_pio4_get_function(struct udevice *dev, unsigned offset) { - struct at91_port_platdata *plat = dev_get_platdata(dev); - struct atmel_pio4_port *port_base = (atmel_pio4_port *)plat->base_addr; - u32 mask = 0x01 << offset; + u32 bank = ATMEL_PIO_BANK(offset); + u32 line = ATMEL_PIO_LINE(offset); + struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank); + u32 mask = BIT(line); writel(mask, &port_base->mskr); @@ -241,21 +274,82 @@ static const struct dm_gpio_ops atmel_pio4_ops = { .get_function = atmel_pio4_get_function, }; +static int atmel_pio4_bind(struct udevice *dev) +{ + return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false); +} + static int atmel_pio4_probe(struct udevice *dev) { - struct at91_port_platdata *plat = dev_get_platdata(dev); + struct atmel_pio4_platdata *plat = dev_get_platdata(dev); struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + struct atmel_pioctrl_data *pioctrl_data; + struct udevice *dev_clk; + struct clk clk; + fdt_addr_t addr_base; + u32 nbanks; + int periph; + int ret; + + ret = clk_get_by_index(dev, 0, &clk); + if (ret) + return ret; + + periph = fdtdec_get_uint(gd->fdt_blob, clk.dev->of_offset, "reg", -1); + if (periph < 0) + return -EINVAL; + + dev_clk = dev_get_parent(clk.dev); + ret = clk_request(dev_clk, &clk); + if (ret) + return ret; + + clk.id = periph; + ret = clk_enable(&clk); + if (ret) + return ret; + + clk_free(&clk); + + addr_base = dev_get_addr(dev); + if (addr_base == FDT_ADDR_T_NONE) + return -EINVAL; + + plat->reg_base = (struct atmel_pio4_port *)addr_base; - uc_priv->bank_name = plat->bank_name; - uc_priv->gpio_count = ATMEL_PIO_NPINS_PER_BANK; + pioctrl_data = (struct atmel_pioctrl_data *)dev_get_driver_data(dev); + nbanks = pioctrl_data->nbanks; + + uc_priv->bank_name = fdt_get_name(gd->fdt_blob, dev->of_offset, NULL); + uc_priv->gpio_count = nbanks * ATMEL_PIO_NPINS_PER_BANK; return 0; } +/* + * The number of banks can be different from a SoC to another one. + * We can have up to 16 banks. + */ +static const struct atmel_pioctrl_data atmel_sama5d2_pioctrl_data = { + .nbanks = 4, +}; + +static const struct udevice_id atmel_pio4_ids[] = { + { + .compatible = "atmel,sama5d2-gpio", + .data = (ulong)&atmel_sama5d2_pioctrl_data, + }, + {} +}; + U_BOOT_DRIVER(gpio_atmel_pio4) = { .name = "gpio_atmel_pio4", .id = UCLASS_GPIO, .ops = &atmel_pio4_ops, .probe = atmel_pio4_probe, + .bind = atmel_pio4_bind, + .of_match = atmel_pio4_ids, + .platdata_auto_alloc_size = sizeof(struct atmel_pio4_platdata), }; + #endif |