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01658ef333
Now that this functionality is modeled using the device tree and regulator uclass, the named GPIO is not referenced anywhere. Remove it, along with the rest of the support for AXP virtual GPIOs. Signed-off-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
133 lines
2.6 KiB
C
133 lines
2.6 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 <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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#include <sunxi_gpio.h>
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#define AXP_GPIO_PREFIX "AXP0-"
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#define AXP_GPIO_COUNT 4
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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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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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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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u8 reg;
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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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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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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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if (ret)
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return ret;
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mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
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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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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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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 = AXP_GPIO_PREFIX;
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uc_priv->gpio_count = AXP_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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