mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-27 05:13:44 +09:00
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>
96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Linaro
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* Peter Griffin <peter.griffin@linaro.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <errno.h>
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#include <linux/bitops.h>
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static int hi6220_gpio_direction_input(struct udevice *dev, unsigned int gpio)
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{
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struct gpio_bank *bank = dev_get_priv(dev);
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u8 data;
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data = readb(bank->base + HI6220_GPIO_DIR);
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data &= ~(1 << gpio);
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writeb(data, bank->base + HI6220_GPIO_DIR);
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return 0;
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}
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static int hi6220_gpio_set_value(struct udevice *dev, unsigned gpio,
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int value)
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{
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struct gpio_bank *bank = dev_get_priv(dev);
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writeb(!!value << gpio, bank->base + (BIT(gpio + 2)));
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return 0;
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}
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static int hi6220_gpio_direction_output(struct udevice *dev, unsigned gpio,
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int value)
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{
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struct gpio_bank *bank = dev_get_priv(dev);
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u8 data;
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data = readb(bank->base + HI6220_GPIO_DIR);
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data |= 1 << gpio;
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writeb(data, bank->base + HI6220_GPIO_DIR);
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hi6220_gpio_set_value(dev, gpio, value);
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return 0;
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}
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static int hi6220_gpio_get_value(struct udevice *dev, unsigned gpio)
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{
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struct gpio_bank *bank = dev_get_priv(dev);
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return !!readb(bank->base + (BIT(gpio + 2)));
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}
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static const struct dm_gpio_ops gpio_hi6220_ops = {
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.direction_input = hi6220_gpio_direction_input,
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.direction_output = hi6220_gpio_direction_output,
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.get_value = hi6220_gpio_get_value,
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.set_value = hi6220_gpio_set_value,
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};
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static int hi6220_gpio_probe(struct udevice *dev)
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{
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struct gpio_bank *bank = dev_get_priv(dev);
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struct hikey_gpio_platdata *plat = dev_get_platdata(dev);
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struct gpio_dev_priv *uc_priv = dev->uclass_priv;
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char name[18], *str;
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sprintf(name, "GPIO%d_", plat->bank_index);
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str = strdup(name);
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if (!str)
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return -ENOMEM;
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uc_priv->bank_name = str;
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uc_priv->gpio_count = HI6220_GPIO_PER_BANK;
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bank->base = (u8 *)plat->base;
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return 0;
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}
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U_BOOT_DRIVER(gpio_hi6220) = {
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.name = "gpio_hi6220",
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.id = UCLASS_GPIO,
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.ops = &gpio_hi6220_ops,
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.probe = hi6220_gpio_probe,
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.priv_auto = sizeof(struct gpio_bank),
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};
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