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9882140622
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. Series-to: Andre Przywara <andre.przywara@arm.com> Series-to: Jagan Teki <jagan@amarulasolutions.com> Series-cc: Chen-Yu Tsai <wens@csie.org> Series-cc: Hans de Goede <hdegoede@redhat.com> Series-cc: Icenowy Zheng <icenowy@aosc.xyz> Series-cc: Maxime Ripard <mripard@kernel.org> Series-cc: Adam Sampson <ats@offog.org> Series-cc: Stefan Roese <sr@denx.de> Series-cc: u-boot@lists.denx.de Cover-letter: sunxi: Control USB VBUS supplies via DT regulators This series converts sunxi boards from controlling VBUS suppllies using GPIO name strings in Kconfig to using regulator devices probed via the devicetree. ARCH_SUNXI already implies DM_REGULATOR_FIXED, so the only new driver needed is for the AXP PMIC drivevbus regulator. This is part 2 of 3 for removing the PHY driver's GPIO Kconfig options. Part 1 was here[1]. Part 3 will finish converting the VBUS/ID detection GPIOs; it requires adding some missing DT properties to a couple of boards, so it will have to wait for at least the next DT sync from Linux. I tried to verify (by inspection) every board affected by this change, but there is some possibility that this could break some boards. See the commit message for patch 3. I have CCed some relevant board maintaners; please test this patch series if you have the opportunity. [1]: https://lore.kernel.org/u-boot/20230122234623.1636-1-samuel@sholland.org/ END Signed-off-by: Samuel Holland <samuel@sholland.org>
134 lines
2.6 KiB
C
134 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 <common.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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#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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