This is a simple pinctrl driver, it just support uart and spi pin-mux now. Signed-off-by: Wills Wang <wills.wang@live.com> Reviewed-by: Simon Glass <sjg@chromium.org> [fixed typo in commit subject line] Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>master
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-$(CONFIG_AR933X_PINCTRL) += pinctrl_ar933x.o
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/*
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* Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <errno.h> |
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#include <asm/io.h> |
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#include <dm/pinctrl.h> |
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#include <mach/ar71xx_regs.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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enum periph_id { |
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PERIPH_ID_UART0, |
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PERIPH_ID_SPI0, |
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PERIPH_ID_NONE = -1, |
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}; |
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struct ar933x_pinctrl_priv { |
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void __iomem *regs; |
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}; |
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static void pinctrl_ar933x_spi_config(struct ar933x_pinctrl_priv *priv, int cs) |
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{ |
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switch (cs) { |
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case 0: |
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clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE, |
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AR933X_GPIO(4), AR933X_GPIO(3) | |
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AR933X_GPIO(5) | AR933X_GPIO(2)); |
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setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC, |
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AR933X_GPIO_FUNC_SPI_EN | |
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AR933X_GPIO_FUNC_RES_TRUE); |
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break; |
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} |
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} |
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static void pinctrl_ar933x_uart_config(struct ar933x_pinctrl_priv *priv, int uart_id) |
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{ |
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switch (uart_id) { |
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case PERIPH_ID_UART0: |
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clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE, |
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AR933X_GPIO(9), AR933X_GPIO(10)); |
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setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC, |
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AR933X_GPIO_FUNC_UART_EN | |
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AR933X_GPIO_FUNC_RES_TRUE); |
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break; |
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} |
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} |
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static int ar933x_pinctrl_request(struct udevice *dev, int func, int flags) |
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{ |
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struct ar933x_pinctrl_priv *priv = dev_get_priv(dev); |
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debug("%s: func=%x, flags=%x\n", __func__, func, flags); |
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switch (func) { |
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case PERIPH_ID_SPI0: |
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pinctrl_ar933x_spi_config(priv, flags); |
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break; |
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case PERIPH_ID_UART0: |
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pinctrl_ar933x_uart_config(priv, func); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int ar933x_pinctrl_get_periph_id(struct udevice *dev, |
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struct udevice *periph) |
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{ |
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u32 cell[2]; |
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int ret; |
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ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset, |
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"interrupts", cell, ARRAY_SIZE(cell)); |
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if (ret < 0) |
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return -EINVAL; |
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switch (cell[0]) { |
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case 128: |
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return PERIPH_ID_UART0; |
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case 129: |
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return PERIPH_ID_SPI0; |
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} |
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return -ENOENT; |
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} |
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static int ar933x_pinctrl_set_state_simple(struct udevice *dev, |
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struct udevice *periph) |
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{ |
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int func; |
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func = ar933x_pinctrl_get_periph_id(dev, periph); |
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if (func < 0) |
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return func; |
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return ar933x_pinctrl_request(dev, func, 0); |
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} |
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static struct pinctrl_ops ar933x_pinctrl_ops = { |
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.set_state_simple = ar933x_pinctrl_set_state_simple, |
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.request = ar933x_pinctrl_request, |
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.get_periph_id = ar933x_pinctrl_get_periph_id, |
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}; |
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static int ar933x_pinctrl_probe(struct udevice *dev) |
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{ |
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struct ar933x_pinctrl_priv *priv = dev_get_priv(dev); |
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fdt_addr_t addr; |
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addr = dev_get_addr(dev); |
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if (addr == FDT_ADDR_T_NONE) |
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return -EINVAL; |
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priv->regs = map_physmem(addr, |
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AR71XX_GPIO_SIZE, |
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MAP_NOCACHE); |
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return 0; |
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} |
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static const struct udevice_id ar933x_pinctrl_ids[] = { |
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{ .compatible = "qca,ar933x-pinctrl" }, |
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{ } |
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}; |
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U_BOOT_DRIVER(pinctrl_ar933x) = { |
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.name = "pinctrl_ar933x", |
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.id = UCLASS_PINCTRL, |
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.of_match = ar933x_pinctrl_ids, |
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.priv_auto_alloc_size = sizeof(struct ar933x_pinctrl_priv), |
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.ops = &ar933x_pinctrl_ops, |
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.probe = ar933x_pinctrl_probe, |
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}; |
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