This is a simple pinctrl driver, it just support uart and spi pin-mux now.
Signed-off-by: Wills Wang wills.wang@live.com ---
Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None
drivers/pinctrl/Kconfig | 9 +++ drivers/pinctrl/Makefile | 1 + drivers/pinctrl/ath79/Makefile | 5 ++ drivers/pinctrl/ath79/pinctrl_ar933x.c | 136 +++++++++++++++++++++++++++++++++ 4 files changed, 151 insertions(+) create mode 100644 drivers/pinctrl/ath79/Makefile create mode 100644 drivers/pinctrl/ath79/pinctrl_ar933x.c
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 2a69bab..854d5a5 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -105,6 +105,15 @@ config SPL_PINCONF
if PINCTRL || SPL_PINCTRL
+config AR933X_PINCTRL + bool "QCA/Athores ar933x pin control driver" + depends on DM && SOC_AR933X + help + Support pin multiplexing control on QCA/Athores ar933x SoCs. + The driver is controlled by a device tree node which contains + both the GPIO definitions and pin control functions for each + available multiplex function. + config ROCKCHIP_PINCTRL bool "Rockchip pin control driver" depends on DM diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 37dc904..b99ed2f 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -6,6 +6,7 @@ obj-y += pinctrl-uclass.o obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC) += pinctrl-generic.o
obj-y += nxp/ +obj-$(CONFIG_ARCH_ATH79) += ath79/ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_PINCTRL_SANDBOX) += pinctrl-sandbox.o
diff --git a/drivers/pinctrl/ath79/Makefile b/drivers/pinctrl/ath79/Makefile new file mode 100644 index 0000000..3fdcf6c --- /dev/null +++ b/drivers/pinctrl/ath79/Makefile @@ -0,0 +1,5 @@ +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_AR933X_PINCTRL) += pinctrl_ar933x.o diff --git a/drivers/pinctrl/ath79/pinctrl_ar933x.c b/drivers/pinctrl/ath79/pinctrl_ar933x.c new file mode 100644 index 0000000..e3f64b6 --- /dev/null +++ b/drivers/pinctrl/ath79/pinctrl_ar933x.c @@ -0,0 +1,136 @@ +/* + * Copyright (C) 2015-2016 Wills Wang wills.wang@live.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <asm/io.h> +#include <dm/pinctrl.h> +#include <mach/ar71xx_regs.h> + +DECLARE_GLOBAL_DATA_PTR; + +enum periph_id { + PERIPH_ID_UART0, + PERIPH_ID_SPI0, + PERIPH_ID_NONE = -1, +}; + +struct ar933x_pinctrl_priv { + void __iomem *regs; +}; + +static void pinctrl_ar933x_spi_config(struct ar933x_pinctrl_priv *priv, int cs) +{ + switch (cs) { + case 0: + clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE, + AR933X_GPIO(4), AR933X_GPIO(3) | + AR933X_GPIO(5) | AR933X_GPIO(2)); + setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC, + AR933X_GPIO_FUNC_SPI_EN | + AR933X_GPIO_FUNC_RES_TRUE); + break; + } +} + +static void pinctrl_ar933x_uart_config(struct ar933x_pinctrl_priv *priv, int uart_id) +{ + switch (uart_id) { + case PERIPH_ID_UART0: + clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE, + AR933X_GPIO(9), AR933X_GPIO(10)); + setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC, + AR933X_GPIO_FUNC_UART_EN | + AR933X_GPIO_FUNC_RES_TRUE); + break; + } +} + +static int ar933x_pinctrl_request(struct udevice *dev, int func, int flags) +{ + struct ar933x_pinctrl_priv *priv = dev_get_priv(dev); + + debug("%s: func=%x, flags=%x\n", __func__, func, flags); + switch (func) { + case PERIPH_ID_SPI0: + pinctrl_ar933x_spi_config(priv, flags); + break; + case PERIPH_ID_UART0: + pinctrl_ar933x_uart_config(priv, func); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int ar933x_pinctrl_get_periph_id(struct udevice *dev, + struct udevice *periph) +{ + u32 cell[2]; + int ret; + + ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset, + "interrupts", cell, ARRAY_SIZE(cell)); + if (ret < 0) + return -EINVAL; + + switch (cell[0]) { + case 128: + return PERIPH_ID_UART0; + case 129: + return PERIPH_ID_SPI0; + } + return -ENOENT; +} + +static int ar933x_pinctrl_set_state_simple(struct udevice *dev, + struct udevice *periph) +{ + int func; + + func = ar933x_pinctrl_get_periph_id(dev, periph); + if (func < 0) + return func; + return ar933x_pinctrl_request(dev, func, 0); +} + +static struct pinctrl_ops ar933x_pinctrl_ops = { + .set_state_simple = ar933x_pinctrl_set_state_simple, + .request = ar933x_pinctrl_request, + .get_periph_id = ar933x_pinctrl_get_periph_id, +}; + +static int ar933x_pinctrl_probe(struct udevice *dev) +{ + struct ar933x_pinctrl_priv *priv = dev_get_priv(dev); + fdt_addr_t addr; + + addr = dev_get_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + priv->regs = map_physmem(addr, + AR71XX_GPIO_SIZE, + MAP_NOCACHE); + return 0; +} + +static const struct udevice_id ar933x_pinctrl_ids[] = { + { .compatible = "qca,ar933x-pinctrl" }, + { } +}; + +U_BOOT_DRIVER(pinctrl_ar933x) = { + .name = "pinctrl_ar933x", + .id = UCLASS_PINCTRL, + .of_match = ar933x_pinctrl_ids, + .priv_auto_alloc_size = sizeof(struct ar933x_pinctrl_priv), + .ops = &ar933x_pinctrl_ops, + .probe = ar933x_pinctrl_probe, +};