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