/*
+ * Copyright (C) 2014-2015 Samsung Electronics
+ * Przemyslaw Marczak <p.marczak@samsung.com>
+ *
* Copyright (C) 2011-2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
#ifndef __CORE_PMIC_H_
#define __CORE_PMIC_H_
-#include <linux/list.h>
#include <i2c.h>
+#include <spi.h>
+#include <linux/list.h>
#include <power/power_chrg.h>
enum { PMIC_I2C, PMIC_SPI, PMIC_NONE};
+
+#ifdef CONFIG_POWER
enum { I2C_PMIC, I2C_NUM, };
enum { PMIC_READ, PMIC_WRITE, };
enum { PMIC_SENSOR_BYTE_ORDER_LITTLE, PMIC_SENSOR_BYTE_ORDER_BIG, };
struct pmic *parent;
struct list_head list;
};
+#endif /* CONFIG_POWER */
+
+#ifdef CONFIG_DM_PMIC
+/**
+ * U-Boot PMIC Framework
+ * =====================
+ *
+ * UCLASS_PMIC - This is designed to provide an I/O interface for PMIC devices.
+ *
+ * For the multi-function PMIC devices, this can be used as parent I/O device
+ * for each IC's interface. Then, each child uses its parent for read/write.
+ *
+ * The driver model tree could look like this:
+ *
+ *_ root device
+ * |_ BUS 0 device (e.g. I2C0) - UCLASS_I2C/SPI/...
+ * | |_ PMIC device (READ/WRITE ops) - UCLASS_PMIC
+ * | |_ REGULATOR device (ldo/buck/... ops) - UCLASS_REGULATOR
+ * | |_ CHARGER device (charger ops) - UCLASS_CHARGER (in the future)
+ * | |_ MUIC device (microUSB connector ops) - UCLASS_MUIC (in the future)
+ * | |_ ...
+ * |
+ * |_ BUS 1 device (e.g. I2C1) - UCLASS_I2C/SPI/...
+ * |_ PMIC device (READ/WRITE ops) - UCLASS_PMIC
+ * |_ RTC device (rtc ops) - UCLASS_RTC (in the future)
+ *
+ * We can find two PMIC cases in boards design:
+ * - single I/O interface
+ * - multiple I/O interfaces
+ * We bind a single PMIC device for each interface, to provide an I/O for
+ * its child devices. And each child usually implements a different function,
+ * controlled by the same interface.
+ *
+ * The binding should be done automatically. If device tree nodes/subnodes are
+ * proper defined, then:
+ *
+ * |_ the ROOT driver will bind the device for I2C/SPI node:
+ * |_ the I2C/SPI driver should bind a device for pmic node:
+ * |_ the PMIC driver should bind devices for its childs:
+ * |_ regulator (child)
+ * |_ charger (child)
+ * |_ other (child)
+ *
+ * The same for other device nodes, for multi-interface PMIC.
+ *
+ * Note:
+ * Each PMIC interface driver should use a different compatible string.
+ *
+ * If a PMIC child device driver needs access the PMIC-specific registers,
+ * it need know only the register address and the access can be done through
+ * the parent pmic driver. Like in the example:
+ *
+ *_ root driver
+ * |_ dev: bus I2C0 - UCLASS_I2C
+ * | |_ dev: my_pmic (read/write) (is parent) - UCLASS_PMIC
+ * | |_ dev: my_regulator (set value/etc..) (is child) - UCLASS_REGULATOR
+ *
+ * To ensure such device relationship, the pmic device driver should also bind
+ * all its child devices, like in the example below. It can be done by calling
+ * the 'pmic_bind_children()' - please refer to the function description, which
+ * can be found in this header file. This function, should be called inside the
+ * driver's bind() method.
+ *
+ * For the example driver, please refer the MAX77686 driver:
+ * - 'drivers/power/pmic/max77686.c'
+ */
+
+/**
+ * struct dm_pmic_ops - PMIC device I/O interface
+ *
+ * Should be implemented by UCLASS_PMIC device drivers. The standard
+ * device operations provides the I/O interface for it's childs.
+ *
+ * @reg_count: device's register count
+ * @read: read 'len' bytes at "reg" and store it into the 'buffer'
+ * @write: write 'len' bytes from the 'buffer' to the register at 'reg' address
+ */
+struct dm_pmic_ops {
+ int (*reg_count)(struct udevice *dev);
+ int (*read)(struct udevice *dev, uint reg, uint8_t *buffer, int len);
+ int (*write)(struct udevice *dev, uint reg, const uint8_t *buffer,
+ int len);
+};
+
+/**
+ * enum pmic_op_type - used for various pmic devices operation calls,
+ * for reduce a number of lines with the same code for read/write or get/set.
+ *
+ * @PMIC_OP_GET - get operation
+ * @PMIC_OP_SET - set operation
+*/
+enum pmic_op_type {
+ PMIC_OP_GET,
+ PMIC_OP_SET,
+};
+
+/**
+ * struct pmic_child_info - basic device's child info for bind child nodes with
+ * the driver by the node name prefix and driver name. This is a helper struct
+ * for function: pmic_bind_children().
+ *
+ * @prefix - child node name prefix (or its name if is unique or single)
+ * @driver - driver name for the sub-node with prefix
+ */
+struct pmic_child_info {
+ const char *prefix;
+ const char *driver;
+};
+
+/* drivers/power/pmic-uclass.c */
+
+/**
+ * pmic_bind_children() - bind drivers for given parent pmic, using child info
+ * found in 'child_info' array.
+ *
+ * @pmic - pmic device - the parent of found child's
+ * @child_info - N-childs info array
+ * @return a positive number of childs, or 0 if no child found (error)
+ *
+ * Note: For N-childs the child_info array should have N+1 entries and the last
+ * entry prefix should be NULL - the same as for drivers compatible.
+ *
+ * For example, a single prefix info (N=1):
+ * static const struct pmic_child_info bind_info[] = {
+ * { .prefix = "ldo", .driver = "ldo_driver" },
+ * { },
+ * };
+ *
+ * This function is useful for regulator sub-nodes:
+ * my_regulator@0xa {
+ * reg = <0xa>;
+ * (pmic - bind automatically by compatible)
+ * compatible = "my_pmic";
+ * ...
+ * (pmic's childs - bind by pmic_bind_children())
+ * (nodes prefix: "ldo", driver: "my_regulator_ldo")
+ * ldo1 { ... };
+ * ldo2 { ... };
+ *
+ * (nodes prefix: "buck", driver: "my_regulator_buck")
+ * buck1 { ... };
+ * buck2 { ... };
+ * };
+ */
+int pmic_bind_children(struct udevice *pmic, int offset,
+ const struct pmic_child_info *child_info);
+
+/**
+ * pmic_get: get the pmic device using its name
+ *
+ * @name - device name
+ * @devp - returned pointer to the pmic device
+ * @return 0 on success or negative value of errno.
+ *
+ * The returned devp device can be used with pmic_read/write calls
+ */
+int pmic_get(const char *name, struct udevice **devp);
+
+/**
+ * pmic_reg_count: get the pmic register count
+ *
+ * The required pmic device can be obtained by 'pmic_get()'
+ *
+ * @dev - pointer to the UCLASS_PMIC device
+ * @return register count value on success or negative value of errno.
+ */
+int pmic_reg_count(struct udevice *dev);
+
+/**
+ * pmic_read/write: read/write to the UCLASS_PMIC device
+ *
+ * The required pmic device can be obtained by 'pmic_get()'
+ *
+ * @pmic - pointer to the UCLASS_PMIC device
+ * @reg - device register offset
+ * @buffer - pointer to read/write buffer
+ * @len - byte count for read/write
+ * @return 0 on success or negative value of errno.
+ */
+int pmic_read(struct udevice *dev, uint reg, uint8_t *buffer, int len);
+int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len);
+
+/**
+ * pmic_reg_read() - read a PMIC register value
+ *
+ * @dev: PMIC device to read
+ * @reg: Register to read
+ * @return value read on success or negative value of errno.
+ */
+int pmic_reg_read(struct udevice *dev, uint reg);
+
+/**
+ * pmic_reg_write() - write a PMIC register value
+ *
+ * @dev: PMIC device to write
+ * @reg: Register to write
+ * @value: Value to write
+ * @return 0 on success or negative value of errno.
+ */
+int pmic_reg_write(struct udevice *dev, uint reg, uint value);
+
+/**
+ * pmic_clrsetbits() - clear and set bits in a PMIC register
+ *
+ * This reads a register, optionally clears some bits, optionally sets some
+ * bits, then writes the register.
+ *
+ * @dev: PMIC device to update
+ * @reg: Register to update
+ * @clr: Bit mask to clear (set those bits that you want cleared)
+ * @set: Bit mask to set (set those bits that you want set)
+ * @return 0 on success or negative value of errno.
+ */
+int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set);
+
+#endif /* CONFIG_DM_PMIC */
+#ifdef CONFIG_POWER
int pmic_init(unsigned char bus);
int power_init_board(void);
int pmic_dialog_init(unsigned char bus);
int pmic_reg_read(struct pmic *p, u32 reg, u32 *val);
int pmic_reg_write(struct pmic *p, u32 reg, u32 val);
int pmic_set_output(struct pmic *p, u32 reg, int ldo, int on);
+#endif
#define pmic_i2c_addr (p->hw.i2c.addr)
#define pmic_i2c_tx_num (p->hw.i2c.tx_num)
projects / karo-tx-uboot.git / blobdiff