GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ * Lukasz Majewski <l.majewski@samsung.com>
+ *
+ * (C) Copyright 2010
+ * Stefano Babic, DENX Software Engineering, sbabic@denx.de
+ *
+ * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
+ */
+
+#include <common.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;
+
+	I2C_SET_BUS(p->bus);
+
+	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;
+	}
+
+	return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
+}
+
+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;
+
+	I2C_SET_BUS(p->bus);
+
+	ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
+	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)
+{
+	i2c_set_bus_num(p->bus);
+	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
+	if (i2c_probe(pmic_i2c_addr)) {
+		printf("Can't find PMIC:%s\n", p->name);
+		return -ENODEV;
+	}
+
+	return 0;
+}