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https://github.com/AsahiLinux/u-boot
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
136 lines
2.9 KiB
C
136 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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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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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.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, dev_of_offset(periph),
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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_read_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 = 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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