diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-at91-pio4.c | 65 |
1 files changed, 60 insertions, 5 deletions
diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c index 26fb5d61d5d..e434a38f1fe 100644 --- a/drivers/pinctrl/pinctrl-at91-pio4.c +++ b/drivers/pinctrl/pinctrl-at91-pio4.c @@ -9,6 +9,8 @@ #include <common.h> #include <dm.h> #include <asm/global_data.h> +#include <dm/device-internal.h> +#include <dm/lists.h> #include <dm/pinctrl.h> #include <linux/bitops.h> #include <linux/io.h> @@ -28,6 +30,25 @@ struct atmel_pio4_plat { unsigned int slew_rate_support; }; +/* + * Table keeping track of the pinctrl driver's slew rate support and the + * corresponding index into the struct udevice_id of the gpio_atmel_pio4 GPIO + * driver. This has been done in order to align the DT of U-Boot with the DT of + * Linux. In Linux, a phandle from a '-gpio' DT property is linked to the + * pinctrl driver, unlike U-Boot which redirects this phandle to a corresponding + * UCLASS_GPIO driver. Thus, in order to link the two, a hook to the bind method + * of the pinctrl driver in U-Boot has been added. This bind method will attach + * the GPIO driver to the pinctrl DT node using this table. + * @slew_rate_support pinctrl driver's slew rate support + * @gdidx index into the GPIO driver's struct udevide_id + * (needed in order to properly bind with driver_data) + */ + +struct atmel_pinctrl_data { + unsigned int slew_rate_support; + int gdidx; +}; + static const struct pinconf_param conf_params[] = { { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 }, { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 }, @@ -181,24 +202,57 @@ const struct pinctrl_ops atmel_pinctrl_ops = { static int atmel_pinctrl_probe(struct udevice *dev) { struct atmel_pio4_plat *plat = dev_get_plat(dev); - ulong priv = dev_get_driver_data(dev); + struct atmel_pinctrl_data *priv = (struct atmel_pinctrl_data *)dev_get_driver_data(dev); fdt_addr_t addr_base; - dev = dev_get_parent(dev); addr_base = dev_read_addr(dev); if (addr_base == FDT_ADDR_T_NONE) return -EINVAL; plat->reg_base = (struct atmel_pio4_port *)addr_base; - plat->slew_rate_support = priv; + plat->slew_rate_support = priv->slew_rate_support; return 0; } +static int atmel_pinctrl_bind(struct udevice *dev) +{ + struct udevice *g; + struct driver *drv; + ofnode node = dev_ofnode(dev); + struct atmel_pinctrl_data *priv = (struct atmel_pinctrl_data *)dev_get_driver_data(dev); + + if (!CONFIG_IS_ENABLED(ATMEL_PIO4)) + return 0; + + /* Obtain a handle to the GPIO driver */ + drv = lists_driver_lookup_name("gpio_atmel_pio4"); + if (!drv) + return -ENOENT; + + /* + * Bind the GPIO driver to the pinctrl DT node, together + * with its corresponding driver_data. + */ + return device_bind_with_driver_data(dev, drv, drv->name, + drv->of_match[priv->gdidx].data, + node, &g); +} + +static const struct atmel_pinctrl_data atmel_sama5d2_pinctrl_data = { + .gdidx = 0, +}; + +static const struct atmel_pinctrl_data microchip_sama7g5_pinctrl_data = { + .slew_rate_support = 1, + .gdidx = 1, +}; + static const struct udevice_id atmel_pinctrl_match[] = { - { .compatible = "atmel,sama5d2-pinctrl" }, + { .compatible = "atmel,sama5d2-pinctrl", + .data = (ulong)&atmel_sama5d2_pinctrl_data, }, { .compatible = "microchip,sama7g5-pinctrl", - .data = (ulong)1, }, + .data = (ulong)µchip_sama7g5_pinctrl_data, }, {} }; @@ -206,6 +260,7 @@ U_BOOT_DRIVER(atmel_pinctrl) = { .name = "pinctrl_atmel_pio4", .id = UCLASS_PINCTRL, .of_match = atmel_pinctrl_match, + .bind = atmel_pinctrl_bind, .probe = atmel_pinctrl_probe, .plat_auto = sizeof(struct atmel_pio4_plat), .ops = &atmel_pinctrl_ops, |