mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
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>
180 lines
3.8 KiB
C
180 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
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*
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* X-Powers AXP Power Management ICs gpio driver
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*/
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#include <common.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/pmic_bus.h>
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#include <asm/gpio.h>
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#include <axp_pmic.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/root.h>
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#include <errno.h>
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static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val);
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static u8 axp_get_gpio_ctrl_reg(unsigned pin)
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{
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switch (pin) {
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case 0: return AXP_GPIO0_CTRL;
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case 1: return AXP_GPIO1_CTRL;
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#ifdef AXP_GPIO2_CTRL
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case 2: return AXP_GPIO2_CTRL;
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#endif
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#ifdef AXP_GPIO3_CTRL
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case 3: return AXP_GPIO3_CTRL;
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#endif
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}
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return 0;
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}
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static int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
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{
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u8 reg;
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switch (pin) {
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#ifndef CONFIG_AXP152_POWER /* NA on axp152 */
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case SUNXI_GPIO_AXP0_VBUS_DETECT:
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return 0;
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#endif
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default:
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reg = axp_get_gpio_ctrl_reg(pin);
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if (reg == 0)
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return -EINVAL;
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return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
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}
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}
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static int axp_gpio_direction_output(struct udevice *dev, unsigned pin,
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int val)
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{
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__maybe_unused int ret;
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u8 reg;
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switch (pin) {
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#ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
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/* Only available on later PMICs */
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case SUNXI_GPIO_AXP0_VBUS_ENABLE:
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ret = pmic_bus_clrbits(AXP_MISC_CTRL,
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AXP_MISC_CTRL_N_VBUSEN_FUNC);
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if (ret)
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return ret;
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return axp_gpio_set_value(dev, pin, val);
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#endif
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default:
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reg = axp_get_gpio_ctrl_reg(pin);
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if (reg == 0)
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return -EINVAL;
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return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
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AXP_GPIO_CTRL_OUTPUT_LOW);
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}
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}
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static int axp_gpio_get_value(struct udevice *dev, unsigned pin)
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{
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u8 reg, val, mask;
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int ret;
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switch (pin) {
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#ifndef CONFIG_AXP152_POWER /* NA on axp152 */
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case SUNXI_GPIO_AXP0_VBUS_DETECT:
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ret = pmic_bus_read(AXP_POWER_STATUS, &val);
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mask = AXP_POWER_STATUS_VBUS_PRESENT;
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break;
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#endif
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#ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
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/* Only available on later PMICs */
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case SUNXI_GPIO_AXP0_VBUS_ENABLE:
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ret = pmic_bus_read(AXP_VBUS_IPSOUT, &val);
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mask = AXP_VBUS_IPSOUT_DRIVEBUS;
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break;
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#endif
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default:
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reg = axp_get_gpio_ctrl_reg(pin);
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if (reg == 0)
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return -EINVAL;
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ret = pmic_bus_read(AXP_GPIO_STATE, &val);
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mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
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}
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if (ret)
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return ret;
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return (val & mask) ? 1 : 0;
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}
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static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
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{
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u8 reg;
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switch (pin) {
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#ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
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/* Only available on later PMICs */
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case SUNXI_GPIO_AXP0_VBUS_ENABLE:
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if (val)
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return pmic_bus_setbits(AXP_VBUS_IPSOUT,
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AXP_VBUS_IPSOUT_DRIVEBUS);
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else
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return pmic_bus_clrbits(AXP_VBUS_IPSOUT,
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AXP_VBUS_IPSOUT_DRIVEBUS);
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#endif
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default:
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reg = axp_get_gpio_ctrl_reg(pin);
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if (reg == 0)
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return -EINVAL;
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return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
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AXP_GPIO_CTRL_OUTPUT_LOW);
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}
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}
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static const struct dm_gpio_ops gpio_axp_ops = {
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.direction_input = axp_gpio_direction_input,
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.direction_output = axp_gpio_direction_output,
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.get_value = axp_gpio_get_value,
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.set_value = axp_gpio_set_value,
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};
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static int gpio_axp_probe(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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/* Tell the uclass how many GPIOs we have */
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uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
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uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
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return 0;
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}
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U_BOOT_DRIVER(gpio_axp) = {
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.name = "gpio_axp",
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.id = UCLASS_GPIO,
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.ops = &gpio_axp_ops,
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.probe = gpio_axp_probe,
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};
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int axp_gpio_init(void)
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{
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struct udevice *dev;
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int ret;
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ret = pmic_bus_init();
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if (ret)
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return ret;
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/* There is no devicetree support for the axp yet, so bind directly */
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ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);
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if (ret)
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return ret;
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return 0;
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}
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