MLK-11556-1 pmic: max17135: add hwmon, mfd and regulator drivers for this pmic

Add PMIC 'MAX17135' module drivers to 4.1.y kernel. These are necessary
to supply power for E-ink panel display functions.

Signed-off-by: Robby Cai <r63905@freescale.com>

2 files changed, 302 insertions, 0 deletions

diff --git a/include/linux/mfd/max17135.h b/include/linux/mfd/max17135.h
new file mode 100644
index 000000000000..e3b8777c8630
--- /dev/null
+++ b/include/linux/mfd/max17135.h
@@ -0,0 +1,220 @@
+/*
+ * Copyright (C) 2010-2015 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+#ifndef __LINUX_REGULATOR_MAX17135_H_
+#define __LINUX_REGULATOR_MAX17135_H_
+
+/*
+ * PMIC Register Addresses
+ */
+enum {
+    REG_MAX17135_EXT_TEMP = 0x0,
+    REG_MAX17135_CONFIG,
+    REG_MAX17135_INT_TEMP = 0x4,
+    REG_MAX17135_STATUS,
+    REG_MAX17135_PRODUCT_REV,
+    REG_MAX17135_PRODUCT_ID,
+    REG_MAX17135_DVR,
+    REG_MAX17135_ENABLE,
+    REG_MAX17135_FAULT,  /*0x0A*/
+    REG_MAX17135_HVINP,
+    REG_MAX17135_PRGM_CTRL,
+    REG_MAX17135_TIMING1 = 0x10,    /* Timing regs base address is 0x10 */
+    REG_MAX17135_TIMING2,
+    REG_MAX17135_TIMING3,
+    REG_MAX17135_TIMING4,
+    REG_MAX17135_TIMING5,
+    REG_MAX17135_TIMING6,
+    REG_MAX17135_TIMING7,
+    REG_MAX17135_TIMING8,
+};
+#define MAX17135_REG_NUM        21
+#define MAX17135_MAX_REGISTER   0xFF
+
+/*
+ * Bitfield macros that use rely on bitfield width/shift information.
+ */
+#define BITFMASK(field) (((1U << (field ## _WID)) - 1) << (field ## _LSH))
+#define BITFVAL(field, val) ((val) << (field ## _LSH))
+#define BITFEXT(var, bit) ((var & BITFMASK(bit)) >> (bit ## _LSH))
+
+/*
+ * Shift and width values for each register bitfield
+ */
+#define EXT_TEMP_LSH    7
+#define EXT_TEMP_WID    9
+
+#define THERMAL_SHUTDOWN_LSH    0
+#define THERMAL_SHUTDOWN_WID    1
+
+#define INT_TEMP_LSH    7
+#define INT_TEMP_WID    9
+
+#define STAT_BUSY_LSH   0
+#define STAT_BUSY_WID   1
+#define STAT_OPEN_LSH   1
+#define STAT_OPEN_WID   1
+#define STAT_SHRT_LSH   2
+#define STAT_SHRT_WID   1
+
+#define PROD_REV_LSH    0
+#define PROD_REV_WID    8
+
+#define PROD_ID_LSH     0
+#define PROD_ID_WID     8
+
+#define DVR_LSH         0
+#define DVR_WID         8
+
+#define ENABLE_LSH      0
+#define ENABLE_WID      1
+#define VCOM_ENABLE_LSH 1
+#define VCOM_ENABLE_WID 1
+
+#define FAULT_FBPG_LSH      0
+#define FAULT_FBPG_WID      1
+#define FAULT_HVINP_LSH     1
+#define FAULT_HVINP_WID     1
+#define FAULT_HVINN_LSH     2
+#define FAULT_HVINN_WID     1
+#define FAULT_FBNG_LSH      3
+#define FAULT_FBNG_WID      1
+#define FAULT_HVINPSC_LSH   4
+#define FAULT_HVINPSC_WID   1
+#define FAULT_HVINNSC_LSH   5
+#define FAULT_HVINNSC_WID   1
+#define FAULT_OT_LSH        6
+#define FAULT_OT_WID        1
+#define FAULT_POK_LSH       7
+#define FAULT_POK_WID       1
+
+#define HVINP_LSH           0
+#define HVINP_WID           4
+
+#define CTRL_DVR_LSH        0
+#define CTRL_DVR_WID        1
+#define CTRL_TIMING_LSH     1
+#define CTRL_TIMING_WID     1
+
+#define TIMING1_LSH         0
+#define TIMING1_WID         8
+#define TIMING2_LSH         0
+#define TIMING2_WID         8
+#define TIMING3_LSH         0
+#define TIMING3_WID         8
+#define TIMING4_LSH         0
+#define TIMING4_WID         8
+#define TIMING5_LSH         0
+#define TIMING5_WID         8
+#define TIMING6_LSH         0
+#define TIMING6_WID         8
+#define TIMING7_LSH         0
+#define TIMING7_WID         8
+#define TIMING8_LSH         0
+#define TIMING8_WID         8
+
+struct max17135 {
+	/* chip revision */
+	int rev;
+
+	struct device *dev;
+	struct max17135_platform_data *pdata;
+
+	/* Platform connection */
+	struct i2c_client *i2c_client;
+
+	/* Timings */
+	unsigned int gvee_pwrup;
+	unsigned int vneg_pwrup;
+	unsigned int vpos_pwrup;
+	unsigned int gvdd_pwrup;
+	unsigned int gvdd_pwrdn;
+	unsigned int vpos_pwrdn;
+	unsigned int vneg_pwrdn;
+	unsigned int gvee_pwrdn;
+
+	/* GPIOs */
+	int gpio_pmic_pwrgood;
+	int gpio_pmic_vcom_ctrl;
+	int gpio_pmic_wakeup;
+	int gpio_pmic_v3p3;
+	int gpio_pmic_intr;
+
+	/* MAX17135 part variables */
+	int pass_num;
+	int vcom_uV;
+
+	/* One-time VCOM setup marker */
+	bool vcom_setup;
+
+	/* powerup/powerdown wait time */
+	int max_wait;
+};
+
+enum {
+    /* In alphabetical order */
+    MAX17135_DISPLAY, /* virtual master enable */
+    MAX17135_GVDD,
+    MAX17135_GVEE,
+    MAX17135_HVINN,
+    MAX17135_HVINP,
+    MAX17135_VCOM,
+    MAX17135_VNEG,
+    MAX17135_VPOS,
+    MAX17135_V3P3,
+    MAX17135_NUM_REGULATORS,
+};
+
+/*
+ * Declarations
+ */
+struct regulator_init_data;
+struct max17135_regulator_data;
+
+struct max17135_platform_data {
+	unsigned int gvee_pwrup;
+	unsigned int vneg_pwrup;
+	unsigned int vpos_pwrup;
+	unsigned int gvdd_pwrup;
+	unsigned int gvdd_pwrdn;
+	unsigned int vpos_pwrdn;
+	unsigned int vneg_pwrdn;
+	unsigned int gvee_pwrdn;
+	int gpio_pmic_pwrgood;
+	int gpio_pmic_vcom_ctrl;
+	int gpio_pmic_wakeup;
+	int gpio_pmic_v3p3;
+	int gpio_pmic_intr;
+	int pass_num;
+	int vcom_uV;
+
+	/* PMIC */
+	struct max17135_regulator_data *regulators;
+	int num_regulators;
+};
+
+struct max17135_regulator_data {
+	int id;
+	struct regulator_init_data *initdata;
+	struct device_node *reg_node;
+};
+
+int max17135_reg_read(int reg_num, unsigned int *reg_val);
+int max17135_reg_write(int reg_num, const unsigned int reg_val);
+
+#endif
diff --git a/include/linux/pmic_status.h b/include/linux/pmic_status.h
new file mode 100644
index 000000000000..a127c7117e13
--- /dev/null
+++ b/include/linux/pmic_status.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2004-2015 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU Lesser General
+ * Public License.  You may obtain a copy of the GNU Lesser General
+ * Public License Version 2.1 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/lgpl-license.html
+ * http://www.gnu.org/copyleft/lgpl.html
+ */
+#ifndef __ASM_ARCH_MXC_PMIC_STATUS_H__
+#define __ASM_ARCH_MXC_PMIC_STATUS_H__
+#include <asm-generic/errno-base.h>
+#ifdef __KERNEL__
+#include <asm/uaccess.h>	/* copy_{from,to}_user() */
+#endif
+/*!
+ * @file arch-mxc/pmic_status.h
+ * @brief PMIC APIs return code definition.
+ *
+ * @ingroup PMIC_CORE
+ */
+
+/*!
+ * @enum PMIC_STATUS
+ * @brief Define return values for all PMIC APIs.
+ *
+ * These return values are used by all of the PMIC APIs.
+ *
+ * @ingroup PMIC
+ */
+typedef enum {
+	PMIC_SUCCESS = 0,	/*!< The requested operation was successfully
+				   completed.                                     */
+	PMIC_ERROR = -1,	/*!< The requested operation could not be completed
+				   due to an error.                               */
+	PMIC_PARAMETER_ERROR = -2,	/*!< The requested operation failed because
+					   one or more of the parameters was
+					   invalid.                             */
+	PMIC_NOT_SUPPORTED = -3,	/*!< The requested operation could not be
+					   completed because the PMIC hardware
+					   does not support it. */
+	PMIC_SYSTEM_ERROR_EINTR = -EINTR,
+
+	PMIC_MALLOC_ERROR = -5,	/*!< Error in malloc function             */
+	PMIC_UNSUBSCRIBE_ERROR = -6,	/*!< Error in un-subscribe event          */
+	PMIC_EVENT_NOT_SUBSCRIBED = -7,	/*!< Event occur and not subscribed       */
+	PMIC_EVENT_CALL_BACK = -8,	/*!< Error - bad call back                */
+	PMIC_CLIENT_NBOVERFLOW = -9,	/*!< The requested operation could not be
+					   completed because there are too many
+					   PMIC client requests */
+} PMIC_STATUS;
+
+/*
+ * Bitfield macros that use rely on bitfield width/shift information.
+ */
+#define BITFMASK(field) (((1U << (field ## _WID)) - 1) << (field ## _LSH))
+#define BITFVAL(field, val) ((val) << (field ## _LSH))
+#define BITFEXT(var, bit) ((var & BITFMASK(bit)) >> (bit ## _LSH))
+
+/*
+ * Macros implementing error handling
+ */
+#define CHECK_ERROR(a)			\
+do {					\
+		int ret = (a); 			\
+		if (ret != PMIC_SUCCESS)	\
+	return ret; 			\
+} while (0)
+
+#define CHECK_ERROR_KFREE(func, freeptrs) \
+do { \
+	int ret = (func); \
+	if (ret != PMIC_SUCCESS) { \
+		freeptrs;	\
+		return ret;	\
+	}	\
+} while (0);
+
+#endif				/* __ASM_ARCH_MXC_PMIC_STATUS_H__ */