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https://github.com/AsahiLinux/u-boot
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95d9ffd7b6
The AXP PMICs have the ability to power off the system. The existing code for this is duplicated for each PMIC variant, and uses the legacy non-DM "pmic_bus" interface. When SYSRESET is enabled, this can all be replaced with a sysreset device using the DM_PMIC interface. Since the trigger bit is the same on all PMIC variants, use the register definitions from the oldest supported PMIC. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <axp_pmic.h>
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#include <dm.h>
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#include <dm/lists.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <sysreset.h>
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#if CONFIG_IS_ENABLED(SYSRESET)
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static int axp_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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int ret;
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if (type != SYSRESET_POWER_OFF)
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return -EPROTONOSUPPORT;
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ret = pmic_clrsetbits(dev->parent, AXP152_SHUTDOWN, 0, AXP152_POWEROFF);
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if (ret < 0)
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return ret;
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return -EINPROGRESS;
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}
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static struct sysreset_ops axp_sysreset_ops = {
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.request = axp_sysreset_request,
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};
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U_BOOT_DRIVER(axp_sysreset) = {
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.name = "axp_sysreset",
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.id = UCLASS_SYSRESET,
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.ops = &axp_sysreset_ops,
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};
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#endif
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static int axp_pmic_reg_count(struct udevice *dev)
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{
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/* TODO: Get the specific value from driver data. */
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return 0x100;
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}
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static struct dm_pmic_ops axp_pmic_ops = {
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.reg_count = axp_pmic_reg_count,
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.read = dm_i2c_read,
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.write = dm_i2c_write,
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};
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static int axp_pmic_bind(struct udevice *dev)
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{
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int ret;
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ret = dm_scan_fdt_dev(dev);
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if (ret)
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return ret;
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if (CONFIG_IS_ENABLED(SYSRESET)) {
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ret = device_bind_driver_to_node(dev, "axp_sysreset", "axp_sysreset",
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dev_ofnode(dev), NULL);
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if (ret)
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return ret;
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}
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return 0;
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}
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static const struct udevice_id axp_pmic_ids[] = {
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{ .compatible = "x-powers,axp152" },
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{ .compatible = "x-powers,axp202" },
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{ .compatible = "x-powers,axp209" },
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{ .compatible = "x-powers,axp221" },
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{ .compatible = "x-powers,axp223" },
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{ .compatible = "x-powers,axp803" },
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{ .compatible = "x-powers,axp806" },
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{ .compatible = "x-powers,axp809" },
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{ .compatible = "x-powers,axp813" },
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{ }
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};
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U_BOOT_DRIVER(axp_pmic) = {
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.name = "axp_pmic",
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.id = UCLASS_PMIC,
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.of_match = axp_pmic_ids,
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.bind = axp_pmic_bind,
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.ops = &axp_pmic_ops,
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};
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