diff options
Diffstat (limited to 'drivers/pinctrl/aspeed/pinctrl_ast2500.c')
| -rw-r--r-- | drivers/pinctrl/aspeed/pinctrl_ast2500.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/pinctrl/aspeed/pinctrl_ast2500.c b/drivers/pinctrl/aspeed/pinctrl_ast2500.c new file mode 100644 index 0000000000..01f97c1b48 --- /dev/null +++ b/drivers/pinctrl/aspeed/pinctrl_ast2500.c @@ -0,0 +1,127 @@ +/* + * Copyright 2017 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <asm/io.h> +#include <asm/arch/pinctrl.h> +#include <asm/arch/scu_ast2500.h> +#include <dm/pinctrl.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * This driver works with very simple configuration that has the same name + * for group and function. This way it is compatible with the Linux Kernel + * driver. + */ + +struct ast2500_pinctrl_priv { + struct ast2500_scu *scu; +}; + +static int ast2500_pinctrl_probe(struct udevice *dev) +{ + struct ast2500_pinctrl_priv *priv = dev_get_priv(dev); + + priv->scu = ast_get_scu(); + + return 0; +} + +struct ast2500_group_config { + char *group_name; + /* Control register number (1-10) */ + unsigned reg_num; + /* The mask of control bits in the register */ + u32 ctrl_bit_mask; +}; + +static const struct ast2500_group_config ast2500_groups[] = { + { "I2C1", 8, (1 << 13) | (1 << 12) }, + { "I2C2", 8, (1 << 15) | (1 << 14) }, + { "I2C3", 8, (1 << 16) }, + { "I2C4", 5, (1 << 17) }, + { "I2C4", 5, (1 << 17) }, + { "I2C5", 5, (1 << 18) }, + { "I2C6", 5, (1 << 19) }, + { "I2C7", 5, (1 << 20) }, + { "I2C8", 5, (1 << 21) }, + { "I2C9", 5, (1 << 22) }, + { "I2C10", 5, (1 << 23) }, + { "I2C11", 5, (1 << 24) }, + { "I2C12", 5, (1 << 25) }, + { "I2C13", 5, (1 << 26) }, + { "I2C14", 5, (1 << 27) }, + { "MAC1LINK", 1, (1 << 0) }, + { "MDIO1", 3, (1 << 31) | (1 << 30) }, + { "MAC2LINK", 1, (1 << 1) }, + { "MDIO2", 5, (1 << 2) }, +}; + +static int ast2500_pinctrl_get_groups_count(struct udevice *dev) +{ + debug("PINCTRL: get_(functions/groups)_count\n"); + + return ARRAY_SIZE(ast2500_groups); +} + +static const char *ast2500_pinctrl_get_group_name(struct udevice *dev, + unsigned selector) +{ + debug("PINCTRL: get_(function/group)_name %u\n", selector); + + return ast2500_groups[selector].group_name; +} + +static int ast2500_pinctrl_group_set(struct udevice *dev, unsigned selector, + unsigned func_selector) +{ + struct ast2500_pinctrl_priv *priv = dev_get_priv(dev); + const struct ast2500_group_config *config; + u32 *ctrl_reg; + + debug("PINCTRL: group_set <%u, %u>\n", selector, func_selector); + if (selector >= ARRAY_SIZE(ast2500_groups)) + return -EINVAL; + + config = &ast2500_groups[selector]; + if (config->reg_num > 6) + ctrl_reg = &priv->scu->pinmux_ctrl1[config->reg_num - 7]; + else + ctrl_reg = &priv->scu->pinmux_ctrl[config->reg_num - 1]; + + ast_scu_unlock(priv->scu); + setbits_le32(ctrl_reg, config->ctrl_bit_mask); + ast_scu_lock(priv->scu); + + return 0; +} + +static struct pinctrl_ops ast2500_pinctrl_ops = { + .set_state = pinctrl_generic_set_state, + .get_groups_count = ast2500_pinctrl_get_groups_count, + .get_group_name = ast2500_pinctrl_get_group_name, + .get_functions_count = ast2500_pinctrl_get_groups_count, + .get_function_name = ast2500_pinctrl_get_group_name, + .pinmux_group_set = ast2500_pinctrl_group_set, +}; + +static const struct udevice_id ast2500_pinctrl_ids[] = { + { .compatible = "aspeed,ast2500-pinctrl" }, + { .compatible = "aspeed,g5-pinctrl" }, + { } +}; + +U_BOOT_DRIVER(pinctrl_ast2500) = { + .name = "aspeed_ast2500_pinctrl", + .id = UCLASS_PINCTRL, + .of_match = ast2500_pinctrl_ids, + .priv_auto_alloc_size = sizeof(struct ast2500_pinctrl_priv), + .ops = &ast2500_pinctrl_ops, + .probe = ast2500_pinctrl_probe, +}; |