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830e161eb4
The sysreset uclass has an option to provide the do_poweroff() function. When that option is enabled, the AXP power drivers should not provide their own definition. For the AXP305, which is paired with 64-bit systems where TF-A provides PSCI, there is another possible conflict with the PSCI firmware driver. This driver can be enabled even if CONFIG_PSCI_RESET is disabled, so make sure to use the right symbol in the condition. 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>
244 lines
5.4 KiB
C
244 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2012
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* Henrik Nordstrom <henrik@henriknordstrom.net>
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/arch/pmic_bus.h>
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#include <axp_pmic.h>
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#include <linux/delay.h>
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#ifdef CONFIG_AXP_ALDO3_VOLT_SLOPE_08
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# define AXP209_VRC_SLOPE AXP209_VRC_LDO3_800uV_uS
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#endif
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#ifdef CONFIG_AXP_ALDO3_VOLT_SLOPE_16
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# define AXP209_VRC_SLOPE AXP209_VRC_LDO3_1600uV_uS
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#endif
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#if defined CONFIG_AXP_ALDO3_VOLT_SLOPE_NONE || !defined AXP209_VRC_SLOPE
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# define AXP209_VRC_SLOPE 0x00
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#endif
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static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
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{
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if (mvolt < min)
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mvolt = min;
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else if (mvolt > max)
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mvolt = max;
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return (mvolt - min) / div;
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}
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int axp_set_dcdc2(unsigned int mvolt)
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{
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int rc;
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u8 cfg, current;
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
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AXP209_OUTPUT_CTRL_DCDC2);
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rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2);
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if (rc)
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return rc;
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cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
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/* Do we really need to be this gentle? It has built-in voltage slope */
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while ((rc = pmic_bus_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
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current != cfg) {
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if (current < cfg)
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current++;
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else
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current--;
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rc = pmic_bus_write(AXP209_DCDC2_VOLTAGE, current);
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if (rc)
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break;
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}
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return rc;
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}
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int axp_set_dcdc3(unsigned int mvolt)
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{
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u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
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int rc;
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
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AXP209_OUTPUT_CTRL_DCDC3);
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rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg);
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if (rc)
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return rc;
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return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3);
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}
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int axp_set_aldo2(unsigned int mvolt)
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{
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int rc;
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u8 cfg, reg;
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
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AXP209_OUTPUT_CTRL_LDO2);
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cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
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rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®);
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if (rc)
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return rc;
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reg |= AXP209_LDO24_LDO2_SET(reg, cfg);
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rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
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if (rc)
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return rc;
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return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2);
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}
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int axp_set_aldo3(unsigned int mvolt)
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{
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u8 cfg;
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int rc;
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
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AXP209_OUTPUT_CTRL_LDO3);
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/*
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* Some boards have trouble reaching the target voltage without causing
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* great inrush currents. To prevent this, boards can enable a certain
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* slope to ramp up voltage. Note, this only works when changing an
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* already active power rail. When toggling power on, the AXP ramps up
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* steeply at 0.0167 V/uS.
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*/
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rc = pmic_bus_read(AXP209_VRC_DCDC2_LDO3, &cfg);
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cfg = AXP209_VRC_LDO3_SLOPE_SET(cfg, AXP209_VRC_SLOPE);
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rc |= pmic_bus_write(AXP209_VRC_DCDC2_LDO3, cfg);
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if (rc)
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return rc;
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#ifdef CONFIG_AXP_ALDO3_INRUSH_QUIRK
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/*
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* On some boards, LDO3 has a too big capacitor installed. When
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* turning on LDO3, this causes the AXP209 to shutdown on
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* voltages over 1.9 volt. As a workaround, we enable LDO3
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* first with the lowest possible voltage. If this still causes
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* high inrush currents, the voltage slope should be increased.
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*/
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rc = pmic_bus_read(AXP209_OUTPUT_CTRL, &cfg);
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if (rc)
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return rc;
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if (!(cfg & AXP209_OUTPUT_CTRL_LDO3)) {
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rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, 0x0); /* 0.7 Volt */
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mdelay(1);
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rc |= pmic_bus_setbits(AXP209_OUTPUT_CTRL,
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AXP209_OUTPUT_CTRL_LDO3);
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if (rc)
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return rc;
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}
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#endif
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if (mvolt == -1) {
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cfg = AXP209_LDO3_VOLTAGE_FROM_LDO3IN;
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} else {
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cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
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cfg = AXP209_LDO3_VOLTAGE_SET(cfg);
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}
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rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg);
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if (rc)
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return rc;
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return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3);
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}
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int axp_set_aldo4(unsigned int mvolt)
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{
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int rc;
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static const unsigned int vindex[] = {
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1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
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2700, 2800, 3000, 3100, 3200, 3300
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};
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u8 cfg, reg;
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
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AXP209_OUTPUT_CTRL_LDO4);
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/* Translate mvolt to register cfg value, requested <= selected */
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for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
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rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, ®);
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if (rc)
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return rc;
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reg |= AXP209_LDO24_LDO4_SET(reg, cfg);
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rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
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if (rc)
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return rc;
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return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4);
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}
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int axp_init(void)
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{
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u8 ver;
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int i, rc;
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rc = pmic_bus_init();
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if (rc)
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return rc;
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rc = pmic_bus_read(AXP209_CHIP_VERSION, &ver);
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if (rc)
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return rc;
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if ((ver & AXP209_CHIP_VERSION_MASK) != 0x1)
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return -EINVAL;
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/* Mask all interrupts */
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for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
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rc = pmic_bus_write(i, 0);
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if (rc)
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return rc;
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}
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/*
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* Turn off LDOIO regulators / tri-state GPIO pins, when rebooting
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* from android these are sometimes on.
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*/
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rc = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT);
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if (rc)
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return rc;
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rc = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT);
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if (rc)
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return rc;
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rc = pmic_bus_write(AXP_GPIO2_CTRL, AXP_GPIO_CTRL_INPUT);
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if (rc)
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return rc;
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return 0;
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}
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#if !IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF)
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int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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pmic_bus_write(AXP209_SHUTDOWN, AXP209_POWEROFF);
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/* infinite loop during shutdown */
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while (1) {}
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/* not reached */
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return 0;
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}
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#endif
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