[J-u-boot.git] / drivers / power / axp209.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2012
 * Henrik Nordstrom <[email protected]>
 */

#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, &current)) == 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, &reg);
	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, &reg);
	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;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
14bc66bd HN	2	/*
	3	* (C) Copyright 2012
	4	* Henrik Nordstrom <[email protected]>
14bc66bd HN	5	*/
	6
	7	#include <common.h>
467e92b3	8	#include <command.h>
30490b52	9	#include <asm/arch/pmic_bus.h>
6944aff1	10	#include <axp_pmic.h>
c05ed00a	11	#include <linux/delay.h>
14bc66bd	12
61436d50 OS	13	#ifdef CONFIG_AXP_ALDO3_VOLT_SLOPE_08
	14	# define AXP209_VRC_SLOPE AXP209_VRC_LDO3_800uV_uS
	15	#endif
	16	#ifdef CONFIG_AXP_ALDO3_VOLT_SLOPE_16
	17	# define AXP209_VRC_SLOPE AXP209_VRC_LDO3_1600uV_uS
	18	#endif
	19	#if defined CONFIG_AXP_ALDO3_VOLT_SLOPE_NONE \|\| !defined AXP209_VRC_SLOPE
	20	# define AXP209_VRC_SLOPE 0x00
	21	#endif
	22
14bc66bd HN	23	static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
	24	{
	25	if (mvolt < min)
	26	mvolt = min;
	27	else if (mvolt > max)
	28	mvolt = max;
	29
	30	return (mvolt - min) / div;
	31	}
	32
6944aff1	33	int axp_set_dcdc2(unsigned int mvolt)
14bc66bd HN	34	{
	35	int rc;
	36	u8 cfg, current;
	37
beba401f HG	38	if (mvolt == 0)
	39	return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
	40	AXP209_OUTPUT_CTRL_DCDC2);
	41
	42	rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2);
	43	if (rc)
	44	return rc;
	45
14bc66bd HN	46	cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
	47
	48	/* Do we really need to be this gentle? It has built-in voltage slope */
30490b52	49	while ((rc = pmic_bus_read(AXP209_DCDC2_VOLTAGE, &current)) == 0 &&
14bc66bd HN	50	current != cfg) {
	51	if (current < cfg)
	52	current++;
	53	else
	54	current--;
	55
30490b52	56	rc = pmic_bus_write(AXP209_DCDC2_VOLTAGE, current);
14bc66bd HN	57	if (rc)
	58	break;
	59	}
	60
	61	return rc;
	62	}
	63
6944aff1	64	int axp_set_dcdc3(unsigned int mvolt)
14bc66bd HN	65	{
14bc66bd HN	66	u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
beba401f HG	67	int rc;
	68
	69	if (mvolt == 0)
	70	return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
	71	AXP209_OUTPUT_CTRL_DCDC3);
14bc66bd	72
beba401f HG	73	rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg);
	74	if (rc)
	75	return rc;
	76
	77	return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3);
14bc66bd HN	78	}
14bc66bd HN	79
6944aff1	80	int axp_set_aldo2(unsigned int mvolt)
14bc66bd HN	81	{
	82	int rc;
	83	u8 cfg, reg;
	84
beba401f HG	85	if (mvolt == 0)
	86	return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
	87	AXP209_OUTPUT_CTRL_LDO2);
	88
14bc66bd HN	89	cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
14bc66bd HN	90
30490b52	91	rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, &reg);
14bc66bd HN	92	if (rc)
	93	return rc;
	94
3f7d76a7	95	reg \|= AXP209_LDO24_LDO2_SET(reg, cfg);
beba401f HG	96	rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
	97	if (rc)
	98	return rc;
	99
	100	return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2);
14bc66bd HN	101	}
14bc66bd HN	102
6944aff1	103	int axp_set_aldo3(unsigned int mvolt)
14bc66bd HN	104	{
14bc66bd HN	105	u8 cfg;
beba401f HG	106	int rc;
	107
	108	if (mvolt == 0)
	109	return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
	110	AXP209_OUTPUT_CTRL_LDO3);
14bc66bd	111
61436d50 OS	112	/*
	113	* Some boards have trouble reaching the target voltage without causing
	114	* great inrush currents. To prevent this, boards can enable a certain
	115	* slope to ramp up voltage. Note, this only works when changing an
	116	* already active power rail. When toggling power on, the AXP ramps up
	117	* steeply at 0.0167 V/uS.
	118	*/
	119	rc = pmic_bus_read(AXP209_VRC_DCDC2_LDO3, &cfg);
	120	cfg = AXP209_VRC_LDO3_SLOPE_SET(cfg, AXP209_VRC_SLOPE);
	121	rc \|= pmic_bus_write(AXP209_VRC_DCDC2_LDO3, cfg);
	122
	123	if (rc)
	124	return rc;
	125
ef52605e OS	126	#ifdef CONFIG_AXP_ALDO3_INRUSH_QUIRK
	127	/*
	128	* On some boards, LDO3 has a too big capacitor installed. When
	129	* turning on LDO3, this causes the AXP209 to shutdown on
	130	* voltages over 1.9 volt. As a workaround, we enable LDO3
	131	* first with the lowest possible voltage. If this still causes
	132	* high inrush currents, the voltage slope should be increased.
	133	*/
	134	rc = pmic_bus_read(AXP209_OUTPUT_CTRL, &cfg);
	135	if (rc)
	136	return rc;
	137
	138	if (!(cfg & AXP209_OUTPUT_CTRL_LDO3)) {
	139	rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, 0x0); /* 0.7 Volt */
	140	mdelay(1);
	141	rc \|= pmic_bus_setbits(AXP209_OUTPUT_CTRL,
	142	AXP209_OUTPUT_CTRL_LDO3);
	143
	144	if (rc)
	145	return rc;
	146	}
	147	#endif
	148
3f7d76a7 OS	149	if (mvolt == -1) {
	150	cfg = AXP209_LDO3_VOLTAGE_FROM_LDO3IN;
	151	} else {
99deda1d	152	cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
3f7d76a7 OS	153	cfg = AXP209_LDO3_VOLTAGE_SET(cfg);
3f7d76a7 OS	154	}
14bc66bd	155
beba401f HG	156	rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg);
	157	if (rc)
	158	return rc;
	159
	160	return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3);
14bc66bd HN	161	}
14bc66bd HN	162
6944aff1	163	int axp_set_aldo4(unsigned int mvolt)
14bc66bd HN	164	{
14bc66bd HN	165	int rc;
6944aff1	166	static const unsigned int vindex[] = {
14bc66bd HN	167	1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
	168	2700, 2800, 3000, 3100, 3200, 3300
	169	};
	170	u8 cfg, reg;
	171
beba401f HG	172	if (mvolt == 0)
	173	return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
	174	AXP209_OUTPUT_CTRL_LDO4);
	175
14bc66bd HN	176	/* Translate mvolt to register cfg value, requested <= selected */
	177	for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
	178
30490b52	179	rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, &reg);
14bc66bd HN	180	if (rc)
	181	return rc;
	182
3f7d76a7	183	reg \|= AXP209_LDO24_LDO4_SET(reg, cfg);
beba401f HG	184	rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
	185	if (rc)
	186	return rc;
	187
	188	return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4);
14bc66bd HN	189	}
14bc66bd HN	190
6944aff1	191	int axp_init(void)
14bc66bd HN	192	{
14bc66bd HN	193	u8 ver;
9dcf68fa	194	int i, rc;
14bc66bd	195
30490b52 HG	196	rc = pmic_bus_init();
	197	if (rc)
	198	return rc;
	199
	200	rc = pmic_bus_read(AXP209_CHIP_VERSION, &ver);
14bc66bd HN	201	if (rc)
	202	return rc;
	203
f5eebc79	204	if ((ver & AXP209_CHIP_VERSION_MASK) != 0x1)
505cf475	205	return -EINVAL;
14bc66bd	206
9dcf68fa HG	207	/* Mask all interrupts */
9dcf68fa HG	208	for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
30490b52	209	rc = pmic_bus_write(i, 0);
9dcf68fa HG	210	if (rc)
	211	return rc;
	212	}
	213
253e62bf HG	214	/*
	215	* Turn off LDOIO regulators / tri-state GPIO pins, when rebooting
	216	* from android these are sometimes on.
	217	*/
	218	rc = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT);
	219	if (rc)
	220	return rc;
	221
	222	rc = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT);
	223	if (rc)
	224	return rc;
	225
	226	rc = pmic_bus_write(AXP_GPIO2_CTRL, AXP_GPIO_CTRL_INPUT);
	227	if (rc)
	228	return rc;
	229
14bc66bd HN	230	return 0;
14bc66bd HN	231	}
467e92b3	232
09140113	233	int do_poweroff(struct cmd_tbl cmdtp, int flag, int argc, char const argv[])
467e92b3 MS	234	{
	235	pmic_bus_write(AXP209_SHUTDOWN, AXP209_POWEROFF);
	236
	237	/* infinite loop during shutdown */
	238	while (1) {}
	239
	240	/* not reached */
	241	return 0;
	242	}