[J-u-boot.git] / drivers / power / power_i2c.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2011 Samsung Electronics
 * Lukasz Majewski <[email protected]>
 *
 * (C) Copyright 2010
 * Stefano Babic, DENX Software Engineering, [email protected]
 *
 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
 * (C) Copyright 2019 NXP
 */

#include <common.h>
#include <log.h>
#include <linux/types.h>
#include <power/pmic.h>
#include <i2c.h>
#include <linux/compiler.h>

int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
{
	unsigned char buf[4] = { 0 };

	if (check_reg(p, reg))
		return -EINVAL;
#if defined(CONFIG_DM_I2C)
	struct udevice *dev;
	int ret;

	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
				      1, &dev);
	if (ret) {
		printf("%s: Cannot find udev for a bus %d\n", __func__,
		       p->bus);
		return -ENXIO;
	}
#else /* Non DM I2C support - will be removed */
	I2C_SET_BUS(p->bus);
#endif

	switch (pmic_i2c_tx_num) {
	case 3:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
			buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[0] = cpu_to_le32(val) & 0xff;
		} else {
			buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[2] = cpu_to_le32(val) & 0xff;
		}
		break;
	case 2:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[0] = cpu_to_le32(val) & 0xff;
		} else {
			buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[1] = cpu_to_le32(val) & 0xff;
		}
		break;
	case 1:
		buf[0] = cpu_to_le32(val) & 0xff;
		break;
	default:
		printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
		return -EINVAL;
	}

#if defined(CONFIG_DM_I2C)
	return dm_i2c_write(dev, reg, buf, pmic_i2c_tx_num);
#else
	return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
#endif
}

int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
{
	unsigned char buf[4] = { 0 };
	u32 ret_val = 0;
	int ret;

	if (check_reg(p, reg))
		return -EINVAL;

#if defined(CONFIG_DM_I2C)
	struct udevice *dev;

	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
				      1, &dev);
	if (ret) {
		printf("%s: Cannot find udev for a bus %d\n", __func__,
		       p->bus);
		return -ENXIO;
	}
	ret = dm_i2c_read(dev, reg, buf, pmic_i2c_tx_num);
#else /* Non DM I2C support - will be removed */
	I2C_SET_BUS(p->bus);
	ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
#endif
	if (ret)
		return ret;

	switch (pmic_i2c_tx_num) {
	case 3:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
			ret_val = le32_to_cpu(buf[2] << 16
					      | buf[1] << 8 | buf[0]);
		else
			ret_val = le32_to_cpu(buf[0] << 16 |
					      buf[1] << 8 | buf[2]);
		break;
	case 2:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
			ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
		else
			ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
		break;
	case 1:
		ret_val = le32_to_cpu(buf[0]);
		break;
	default:
		printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
		return -EINVAL;
	}
	memcpy(val, &ret_val, sizeof(ret_val));

	return 0;
}

int pmic_probe(struct pmic *p)
{
	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
#if defined(CONFIG_DM_I2C)
	struct udevice *dev;
	int ret;

	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
				      1, &dev);
	if (ret) {
		printf("%s: Cannot find udev for a bus %d\n", __func__,
		       p->bus);
		return -ENXIO;
	}
#else /* Non DM I2C support - will be removed */
	i2c_set_bus_num(p->bus);
	if (i2c_probe(pmic_i2c_addr)) {
		printf("Can't find PMIC:%s\n", p->name);
		return -ENODEV;
	}
#endif

	return 0;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
e542b7f0 ŁM	2	/*
	3	* Copyright (C) 2011 Samsung Electronics
	4	* Lukasz Majewski <[email protected]>
	5	*
	6	* (C) Copyright 2010
	7	* Stefano Babic, DENX Software Engineering, [email protected]
	8	*
	9	* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
bb1165f9	10	* (C) Copyright 2019 NXP
e542b7f0 ŁM	11	*/
	12
	13	#include <common.h>
f7ae49fc	14	#include <log.h>
e542b7f0	15	#include <linux/types.h>
c7336815	16	#include <power/pmic.h>
e542b7f0	17	#include <i2c.h>
afc366f0	18	#include <linux/compiler.h>
e542b7f0 ŁM	19
	20	int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
	21	{
	22	unsigned char buf[4] = { 0 };
	23
c7336815	24	if (check_reg(p, reg))
505cf475	25	return -EINVAL;
bb1165f9 BL	26	#if defined(CONFIG_DM_I2C)
	27	struct udevice *dev;
	28	int ret;
e542b7f0	29
bb1165f9 BL	30	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
	31	1, &dev);
	32	if (ret) {
	33	printf("%s: Cannot find udev for a bus %d\n", __func__,
	34	p->bus);
	35	return -ENXIO;
	36	}
	37	#else /* Non DM I2C support - will be removed */
0b259dc2	38	I2C_SET_BUS(p->bus);
bb1165f9	39	#endif
0b259dc2	40
e542b7f0 ŁM	41	switch (pmic_i2c_tx_num) {
e542b7f0 ŁM	42	case 3:
86879d71 ŁM	43	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
	44	buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
	45	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	46	buf[0] = cpu_to_le32(val) & 0xff;
	47	} else {
	48	buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
	49	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	50	buf[2] = cpu_to_le32(val) & 0xff;
	51	}
e542b7f0	52	break;
b5bf9caf	53	case 2:
86879d71 ŁM	54	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
	55	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	56	buf[0] = cpu_to_le32(val) & 0xff;
	57	} else {
	58	buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
	59	buf[1] = cpu_to_le32(val) & 0xff;
	60	}
b5bf9caf	61	break;
e542b7f0	62	case 1:
86879d71	63	buf[0] = cpu_to_le32(val) & 0xff;
e542b7f0	64	break;
a22429d2 FE	65	default:
a22429d2 FE	66	printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
505cf475	67	return -EINVAL;
e542b7f0 ŁM	68	}
e542b7f0 ŁM	69
bb1165f9 BL	70	#if defined(CONFIG_DM_I2C)
	71	return dm_i2c_write(dev, reg, buf, pmic_i2c_tx_num);
	72	#else
505cf475	73	return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
bb1165f9	74	#endif
e542b7f0 ŁM	75	}
	76
	77	int pmic_reg_read(struct pmic p, u32 reg, u32 val)
	78	{
	79	unsigned char buf[4] = { 0 };
	80	u32 ret_val = 0;
505cf475	81	int ret;
e542b7f0	82
c7336815	83	if (check_reg(p, reg))
505cf475	84	return -EINVAL;
e542b7f0	85
bb1165f9 BL	86	#if defined(CONFIG_DM_I2C)
bb1165f9 BL	87	struct udevice *dev;
0b259dc2	88
bb1165f9 BL	89	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
	90	1, &dev);
	91	if (ret) {
	92	printf("%s: Cannot find udev for a bus %d\n", __func__,
	93	p->bus);
	94	return -ENXIO;
	95	}
	96	ret = dm_i2c_read(dev, reg, buf, pmic_i2c_tx_num);
	97	#else /* Non DM I2C support - will be removed */
	98	I2C_SET_BUS(p->bus);
505cf475	99	ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
bb1165f9	100	#endif
505cf475 JC	101	if (ret)
505cf475 JC	102	return ret;
e542b7f0 ŁM	103
	104	switch (pmic_i2c_tx_num) {
	105	case 3:
86879d71 ŁM	106	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
	107	ret_val = le32_to_cpu(buf[2] << 16
	108	\| buf[1] << 8 \| buf[0]);
	109	else
	110	ret_val = le32_to_cpu(buf[0] << 16 \|
	111	buf[1] << 8 \| buf[2]);
e542b7f0	112	break;
b5bf9caf	113	case 2:
86879d71 ŁM	114	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
	115	ret_val = le32_to_cpu(buf[1] << 8 \| buf[0]);
	116	else
	117	ret_val = le32_to_cpu(buf[0] << 8 \| buf[1]);
b5bf9caf	118	break;
e542b7f0	119	case 1:
86879d71	120	ret_val = le32_to_cpu(buf[0]);
e542b7f0	121	break;
a22429d2 FE	122	default:
a22429d2 FE	123	printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
505cf475	124	return -EINVAL;
e542b7f0 ŁM	125	}
	126	memcpy(val, &ret_val, sizeof(ret_val));
	127
	128	return 0;
	129	}
	130
	131	int pmic_probe(struct pmic *p)
	132	{
b5bf9caf	133	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
bb1165f9 BL	134	#if defined(CONFIG_DM_I2C)
	135	struct udevice *dev;
	136	int ret;
	137
	138	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
	139	1, &dev);
	140	if (ret) {
	141	printf("%s: Cannot find udev for a bus %d\n", __func__,
	142	p->bus);
	143	return -ENXIO;
	144	}
	145	#else /* Non DM I2C support - will be removed */
	146	i2c_set_bus_num(p->bus);
e542b7f0 ŁM	147	if (i2c_probe(pmic_i2c_addr)) {
e542b7f0 ŁM	148	printf("Can't find PMIC:%s\n", p->name);
505cf475	149	return -ENODEV;
e542b7f0	150	}
bb1165f9	151	#endif
e542b7f0 ŁM	152
	153	return 0;
	154	}