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![Hans de Goede](/assets/img/avatar_default.png)
Add support for disabling the regulators found on the axp209 pmic. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
171 lines
3.3 KiB
C
171 lines
3.3 KiB
C
/*
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* (C) Copyright 2012
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* Henrik Nordstrom <henrik@henriknordstrom.net>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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 <axp_pmic.h>
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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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/* LDO2 configuration is in upper 4 bits */
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reg = (reg & 0x0f) | (cfg << 4);
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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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if (mvolt == -1)
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cfg = 0x80; /* determined by LDO3IN pin */
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else
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cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
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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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/* LDO4 configuration is in lower 4 bits */
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reg = (reg & 0xf0) | (cfg << 0);
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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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/* Low 4 bits is chip version */
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ver &= 0x0f;
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if (ver != 0x1)
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return -1;
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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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return 0;
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}
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