From 4f0e44e46615e3c827dcd1ec59677be1058d394c Mon Sep 17 00:00:00 2001 From: "maxims@google.com" Date: Mon, 17 Apr 2017 12:00:27 -0700 Subject: aspeed: AST2500 Pinctrl Driver This driver uses Generic Pinctrl framework and is compatible with the Linux driver for ast2500: it uses the same device tree configuration. Not all pins are supported by the driver at the moment, so it actually compatible with ast2400. In general, however, there are differences that in the future would be easier to maintain separately. Signed-off-by: Maxim Sloyko Reviewed-by: Simon Glass --- drivers/pinctrl/Kconfig | 9 +++ drivers/pinctrl/Makefile | 1 + drivers/pinctrl/aspeed/Makefile | 1 + drivers/pinctrl/aspeed/pinctrl_ast2500.c | 127 +++++++++++++++++++++++++++++++ 4 files changed, 138 insertions(+) create mode 100644 drivers/pinctrl/aspeed/Makefile create mode 100644 drivers/pinctrl/aspeed/pinctrl_ast2500.c (limited to 'drivers/pinctrl') diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 9cea6f202c..f6616c5329 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -248,6 +248,15 @@ config PINCTRL_STM32 the GPIO definitions and pin control functions for each available multiplex function. +config ASPEED_AST2500_PINCTRL + bool "Aspeed AST2500 pin control driver" + depends on DM && PINCTRL_GENERIC && ASPEED_AST2500 + default y + help + Support pin multiplexing control on Aspeed ast2500 SoC. The driver uses + Generic Pinctrl framework and is compatible with the Linux driver, + i.e. it uses the same device tree configuration. + endif source "drivers/pinctrl/meson/Kconfig" diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 17a7173d35..1e5c4257c4 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC) += pinctrl-generic.o obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o obj-$(CONFIG_PINCTRL_AT91PIO4) += pinctrl-at91-pio4.o obj-y += nxp/ +obj-$(CONFIG_ARCH_ASPEED) += aspeed/ obj-$(CONFIG_ARCH_ATH79) += ath79/ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_PINCTRL_SANDBOX) += pinctrl-sandbox.o diff --git a/drivers/pinctrl/aspeed/Makefile b/drivers/pinctrl/aspeed/Makefile new file mode 100644 index 0000000000..2e6ed604c8 --- /dev/null +++ b/drivers/pinctrl/aspeed/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_ASPEED_AST2500_PINCTRL) += pinctrl_ast2500.o 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 +#include +#include +#include +#include +#include +#include + +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, +}; -- cgit