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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Qualcomm GPIO driver
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*
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* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.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 <asm/gpio.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Register offsets */
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#define GPIO_CONFIG_OFF(no) ((no) * 0x1000)
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#define GPIO_IN_OUT_OFF(no) ((no) * 0x1000 + 0x4)
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/* OE */
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#define GPIO_OE_DISABLE (0x0 << 9)
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#define GPIO_OE_ENABLE (0x1 << 9)
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#define GPIO_OE_MASK (0x1 << 9)
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/* GPIO_IN_OUT register shifts. */
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#define GPIO_IN 0
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#define GPIO_OUT 1
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struct msm_gpio_bank {
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phys_addr_t base;
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};
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static int msm_gpio_direction_input(struct udevice *dev, unsigned int gpio)
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{
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struct msm_gpio_bank *priv = dev_get_priv(dev);
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phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);
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/* Disable OE bit */
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clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_DISABLE);
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return 0;
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}
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static int msm_gpio_set_value(struct udevice *dev, unsigned gpio, int value)
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{
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struct msm_gpio_bank *priv = dev_get_priv(dev);
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value = !!value;
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/* set value */
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writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
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return 0;
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}
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static int msm_gpio_direction_output(struct udevice *dev, unsigned gpio,
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int value)
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{
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struct msm_gpio_bank *priv = dev_get_priv(dev);
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phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);
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value = !!value;
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/* set value */
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writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
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/* switch direction */
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clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_ENABLE);
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return 0;
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}
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static int msm_gpio_get_value(struct udevice *dev, unsigned gpio)
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{
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struct msm_gpio_bank *priv = dev_get_priv(dev);
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return !!(readl(priv->base + GPIO_IN_OUT_OFF(gpio)) >> GPIO_IN);
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}
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static int msm_gpio_get_function(struct udevice *dev, unsigned offset)
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{
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struct msm_gpio_bank *priv = dev_get_priv(dev);
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if (readl(priv->base + GPIO_CONFIG_OFF(offset)) & GPIO_OE_ENABLE)
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return GPIOF_OUTPUT;
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return GPIOF_INPUT;
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}
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static const struct dm_gpio_ops gpio_msm_ops = {
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.direction_input = msm_gpio_direction_input,
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.direction_output = msm_gpio_direction_output,
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.get_value = msm_gpio_get_value,
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.set_value = msm_gpio_set_value,
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.get_function = msm_gpio_get_function,
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};
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static int msm_gpio_probe(struct udevice *dev)
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{
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struct msm_gpio_bank *priv = dev_get_priv(dev);
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priv->base = devfdt_get_addr(dev);
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return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
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}
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static int msm_gpio_ofdata_to_platdata(struct udevice *dev)
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{
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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uc_priv->gpio_count = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
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"gpio-count", 0);
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uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
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"gpio-bank-name", NULL);
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if (uc_priv->bank_name == NULL)
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uc_priv->bank_name = "soc";
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return 0;
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}
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static const struct udevice_id msm_gpio_ids[] = {
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{ .compatible = "qcom,msm8916-pinctrl" },
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{ .compatible = "qcom,apq8016-pinctrl" },
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{ }
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};
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U_BOOT_DRIVER(gpio_msm) = {
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.name = "gpio_msm",
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.id = UCLASS_GPIO,
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.of_match = msm_gpio_ids,
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.ofdata_to_platdata = msm_gpio_ofdata_to_platdata,
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.probe = msm_gpio_probe,
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.ops = &gpio_msm_ops,
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.priv_auto_alloc_size = sizeof(struct msm_gpio_bank),
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};
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