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https://github.com/AsahiLinux/u-boot
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152f489841
This patch adds support for the GPIO perif found on hi6220 SoC. Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
95 lines
2 KiB
C
95 lines
2 KiB
C
/*
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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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* 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 <asm/gpio.h>
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#include <asm/io.h>
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#include <errno.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_alloc_size = sizeof(struct gpio_bank),
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};
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