4 files changed, 161 insertions, 0 deletions
diff --git a/include/pbl/bio.h b/include/pbl/bio.h
new file mode 100644
index 0000000000..79e47451a0
--- /dev/null
+++ b/include/pbl/bio.h
@@ -0,0 +1,19 @@
+#ifndef __PBL_BIO_H__
+#define __PBL_BIO_H__
+
+#include <linux/types.h>
+
+struct pbl_bio {
+	void *priv;
+	int (*read)(struct pbl_bio *bio, off_t block_off, void *buf, unsigned nblocks);
+};
+
+static inline int pbl_bio_read(struct pbl_bio *bio, off_t block_off,
+			       void *buf, unsigned nblocks)
+{
+	return bio->read(bio, block_off, buf, nblocks);
+}
+
+ssize_t pbl_fat_load(struct pbl_bio *, const char *filename, void *dest, size_t len);
+
+#endif /* __PBL_H__ */
diff --git a/include/pbl/eeprom.h b/include/pbl/eeprom.h
new file mode 100644
index 0000000000..4d9ef22fc8
--- /dev/null
+++ b/include/pbl/eeprom.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PBL_EEPROM_H_
+#define __PBL_EEPROM_H_
+
+#include <common.h>
+#include <pbl/i2c.h>
+
+static inline int eeprom_read(struct pbl_i2c *i2c, u16 client_addr, u32 addr, void *buf, u16 count)
+{
+	u8 msgbuf[2];
+	struct i2c_msg msg[] = {
+		{
+			.addr = client_addr,
+			.buf = msgbuf,
+		}, {
+			.addr = client_addr,
+			.flags = I2C_M_RD,
+			.buf = buf,
+			.len = count,
+		},
+	};
+	int ret, i = 0;
+
+	if (addr & I2C_ADDR_16_BIT)
+		msgbuf[i++] = addr >> 8;
+	msgbuf[i++] = addr;
+	msg[0].len = i;
+
+	ret = pbl_i2c_xfer(i2c, msg, ARRAY_SIZE(msg));
+	if (ret < 0)
+		return ret;
+
+	if (ret != ARRAY_SIZE(msg)) {
+		pr_err("Failed to read from eeprom@%x: %d\n", client_addr, ret);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+#endif
diff --git a/include/pbl/i2c.h b/include/pbl/i2c.h
new file mode 100644
index 0000000000..b31f72bee7
--- /dev/null
+++ b/include/pbl/i2c.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __PBL_I2C_H
+#define __PBL_I2C_H
+
+#include <i2c/i2c.h>
+
+struct pbl_i2c {
+	int (*xfer)(struct pbl_i2c *, struct i2c_msg *msgs, int num);
+};
+
+static inline int pbl_i2c_xfer(struct pbl_i2c *i2c,
+			       struct i2c_msg *msgs, int num)
+{
+	return i2c->xfer(i2c, msgs, num);
+}
+
+struct pbl_i2c *imx8m_i2c_early_init(void __iomem *regs);
+struct pbl_i2c *imx6_i2c_early_init(void __iomem *regs);
+struct pbl_i2c *ls1046_i2c_init(void __iomem *regs);
+struct pbl_i2c *imx93_i2c_early_init(void __iomem *regs);
+
+static inline int i2c_dev_probe(struct pbl_i2c *i2c, int addr, bool onebyte)
+{
+	u8 buf[1];
+	struct i2c_msg msgs[] = {
+		{
+			.addr = addr,
+			.buf = buf,
+			.flags = I2C_M_RD,
+			.len = onebyte,
+		},
+	};
+
+	return pbl_i2c_xfer(i2c, msgs, 1) == 1 ? 0 : -ENODEV;
+}
+
+
+#endif /* __PBL_I2C_H */
diff --git a/include/pbl/pmic.h b/include/pbl/pmic.h
new file mode 100644
index 0000000000..91c5be3ff3
--- /dev/null
+++ b/include/pbl/pmic.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PBL_PMIC_H_
+#define __PBL_PMIC_H_
+
+#include <pbl/i2c.h>
+
+struct pmic_config {
+	u8 reg;
+	u8 val;
+};
+
+static inline void pmic_reg_read8(struct pbl_i2c *i2c, int addr, u8 reg, u8 *val)
+{
+	int ret;
+	struct i2c_msg msg[] = {
+		{
+			.addr = addr,
+			.buf = &reg,
+			.len = 1,
+		}, {
+			.addr = addr,
+			.flags = I2C_M_RD,
+			.buf = val,
+			.len = 1,
+		},
+	};
+
+	ret = pbl_i2c_xfer(i2c, msg, ARRAY_SIZE(msg));
+	if (ret != ARRAY_SIZE(msg))
+		pr_err("Failed to read from pmic@%x: %d\n", addr, ret);
+}
+
+static void pmic_reg_write8(struct pbl_i2c *i2c, int addr, u8 reg, u8 val)
+{
+	int ret;
+	u8 buf[32];
+	struct i2c_msg msgs[] = {
+		{
+			.addr = addr,
+			.buf = buf,
+		},
+	};
+
+	buf[0] = reg;
+	buf[1] = val;
+
+	msgs[0].len = 2;
+
+	ret = pbl_i2c_xfer(i2c, msgs, ARRAY_SIZE(msgs));
+	if (ret != 1)
+		pr_err("Failed to write to pmic@%x: %d\n", addr, ret);
+}
+
+static inline void pmic_configure(struct pbl_i2c *i2c, u8 addr,
+				  const struct pmic_config *config,
+				  size_t config_len)
+{
+	for (; config_len--; config++)
+		pmic_reg_write8(i2c, addr, config->reg, config->val);
+}
+
+#endif