diff options
| -rw-r--r-- | drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c index 6a31d98937d..630cedf2d67 100644 --- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c @@ -20,17 +20,22 @@ #include <common.h> #include <config.h> #include <dm.h> +#include <dm/device-internal.h> +#include <dm/lists.h> #include <dm/pinctrl.h> #include <dm/root.h> #include <errno.h> #include <fdtdec.h> #include <regmap.h> +#include <asm/gpio.h> #include <asm/system.h> #include <asm/io.h> DECLARE_GLOBAL_DATA_PTR; #define OUTPUT_EN 0x0 +#define INPUT_VAL 0x10 +#define OUTPUT_VAL 0x18 #define OUTPUT_CTL 0x20 #define SELECTION 0x30 @@ -189,6 +194,16 @@ const struct armada_37xx_pin_data armada_37xx_pin_sb = { .ngroups = ARRAY_SIZE(armada_37xx_sb_groups), }; +static inline void armada_37xx_update_reg(unsigned int *reg, + unsigned int offset) +{ + /* We never have more than 2 registers */ + if (offset >= GPIO_PER_REG) { + offset -= GPIO_PER_REG; + *reg += sizeof(u32); + } +} + static int armada_37xx_get_func_reg(struct armada_37xx_pin_group *grp, const char *func) { @@ -399,6 +414,149 @@ static int armada_37xx_fill_func(struct armada_37xx_pinctrl *info) return 0; } +static int armada_37xx_gpio_get(struct udevice *dev, unsigned int offset) +{ + struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent); + unsigned int reg = INPUT_VAL; + unsigned int val, mask; + + armada_37xx_update_reg(®, offset); + mask = BIT(offset); + + val = readl(info->base + reg); + + return (val & mask) != 0; +} + +static int armada_37xx_gpio_set(struct udevice *dev, unsigned int offset, + int value) +{ + struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent); + unsigned int reg = OUTPUT_VAL; + unsigned int mask, val; + + armada_37xx_update_reg(®, offset); + mask = BIT(offset); + val = value ? mask : 0; + + clrsetbits_le32(info->base + reg, mask, val); + + return 0; +} + +static int armada_37xx_gpio_get_direction(struct udevice *dev, + unsigned int offset) +{ + struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent); + unsigned int reg = OUTPUT_EN; + unsigned int val, mask; + + armada_37xx_update_reg(®, offset); + mask = BIT(offset); + val = readl(info->base + reg); + + if (val & mask) + return GPIOF_OUTPUT; + else + return GPIOF_INPUT; +} + +static int armada_37xx_gpio_direction_input(struct udevice *dev, + unsigned int offset) +{ + struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent); + unsigned int reg = OUTPUT_EN; + unsigned int mask; + + armada_37xx_update_reg(®, offset); + mask = BIT(offset); + + clrbits_le32(info->base + reg, mask); + + return 0; +} + +static int armada_37xx_gpio_direction_output(struct udevice *dev, + unsigned int offset, int value) +{ + struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent); + unsigned int reg = OUTPUT_EN; + unsigned int mask; + + armada_37xx_update_reg(®, offset); + mask = BIT(offset); + + setbits_le32(info->base + reg, mask); + + /* And set the requested value */ + return armada_37xx_gpio_set(dev, offset, value); +} + +static int armada_37xx_gpio_probe(struct udevice *dev) +{ + struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent); + struct gpio_dev_priv *uc_priv; + + uc_priv = dev_get_uclass_priv(dev); + uc_priv->bank_name = info->data->name; + uc_priv->gpio_count = info->data->nr_pins; + + return 0; +} + +static const struct dm_gpio_ops armada_37xx_gpio_ops = { + .set_value = armada_37xx_gpio_set, + .get_value = armada_37xx_gpio_get, + .get_function = armada_37xx_gpio_get_direction, + .direction_input = armada_37xx_gpio_direction_input, + .direction_output = armada_37xx_gpio_direction_output, +}; + +static struct driver armada_37xx_gpio_driver = { + .name = "armada-37xx-gpio", + .id = UCLASS_GPIO, + .probe = armada_37xx_gpio_probe, + .ops = &armada_37xx_gpio_ops, +}; + +static int armada_37xx_gpiochip_register(struct udevice *parent, + struct armada_37xx_pinctrl *info) +{ + const void *blob = gd->fdt_blob; + int node = dev_of_offset(parent); + struct uclass_driver *drv; + struct udevice *dev; + int ret = -ENODEV; + int subnode; + char *name; + + /* Lookup GPIO driver */ + drv = lists_uclass_lookup(UCLASS_GPIO); + if (!drv) { + puts("Cannot find GPIO driver\n"); + return -ENOENT; + } + + fdt_for_each_subnode(subnode, blob, node) { + if (!fdtdec_get_bool(blob, subnode, "gpio-controller")) { + ret = 0; + break; + } + }; + if (ret) + return ret; + + name = calloc(1, 32); + sprintf(name, "armada-37xx-gpio"); + + /* Create child device UCLASS_GPIO and bind it */ + device_bind(parent, &armada_37xx_gpio_driver, name, NULL, subnode, + &dev); + dev_set_of_offset(dev, subnode); + + return 0; +} + const struct pinctrl_ops armada_37xx_pinctrl_ops = { .get_groups_count = armada_37xx_pmx_get_groups_count, .get_group_name = armada_37xx_pmx_get_group_name, @@ -444,6 +602,10 @@ int armada_37xx_pinctrl_probe(struct udevice *dev) if (ret) return ret; + ret = armada_37xx_gpiochip_register(dev, info); + if (ret) + return ret; + return 0; } |