mfd: Add TI TPS80031 mfd core driver

TPS80031/ TPS80032 Fully Integrated Power Management with Power
Path and Battery Charger. The device provides five configurable
step-down converters, 11 general purpose LDOs, USB OTG Module,
ADC, RTC, 2 PWM, System Voltage Regulator/Battery Charger with
Power Path from USB, 32K clock generator.

Add the mfd core driver for TPS80031/TPS80032.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

4 files changed, 1225 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 59359a7a2493..ca633df7c330 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -265,6 +265,20 @@ config MFD_TPS65912_SPI
           If you say yes here you get support for the TPS65912 series of
           PM chips with SPI interface.
 
+config MFD_TPS80031
+        bool "TI TPS80031/TPS80032 Power Management chips"
+        depends on I2C=y && GENERIC_HARDIRQS
+        select MFD_CORE
+        select REGMAP_I2C
+        select IRQ_DOMAIN
+        help
+          If you say yes here you get support for the Texas Instruments
+          TPS80031/ TPS80032 Fully Integrated Power Management with Power
+          Path and Battery Charger. The device provides five configurable
+          step-down converters, 11 general purpose LDOs, USB OTG Module,
+          ADC, RTC, 2 PWM, System Voltage Regulator/Battery Charger with
+          Power Path from USB, 32K clock generator.
+
 config MENELAUS
         bool "Texas Instruments TWL92330/Menelaus PM chip"
         depends on I2C=y && ARCH_OMAP2
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1c3ee7c76906..8072460e99d2 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -61,6 +61,7 @@ tps65912-objs                   := tps65912-core.o tps65912-irq.o
 obj-$(CONFIG_MFD_TPS65912)      += tps65912.o
 obj-$(CONFIG_MFD_TPS65912_I2C)  += tps65912-i2c.o
 obj-$(CONFIG_MFD_TPS65912_SPI)  += tps65912-spi.o
+obj-$(CONFIG_MFD_TPS80031)      += tps80031.o
 obj-$(CONFIG_MENELAUS)          += menelaus.o
 
 obj-$(CONFIG_TWL4030_CORE)      += twl-core.o twl4030-irq.o twl6030-irq.o
diff --git a/drivers/mfd/tps80031.c b/drivers/mfd/tps80031.c
new file mode 100644
index 000000000000..f64005efa6fa
--- /dev/null
+++ b/drivers/mfd/tps80031.c
@@ -0,0 +1,573 @@
+/*
+ * tps80031.c -- TI TPS80031/TPS80032 mfd core driver.
+ *
+ * MFD core driver for TI TPS80031/TPS80032 Fully Integrated
+ * Power Management with Power Path and Battery Charger
+ *
+ * Copyright (c) 2012, NVIDIA Corporation.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; 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
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps80031.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static struct resource tps80031_rtc_resources[] = {
+        {
+                .start = TPS80031_INT_RTC_ALARM,
+                .end = TPS80031_INT_RTC_ALARM,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+/* TPS80031 sub mfd devices */
+static struct mfd_cell tps80031_cell[] = {
+        {
+                .name = "tps80031-pmic",
+        },
+        {
+                .name = "tps80031-clock",
+        },
+        {
+                .name = "tps80031-rtc",
+                .num_resources = ARRAY_SIZE(tps80031_rtc_resources),
+                .resources = tps80031_rtc_resources,
+        },
+        {
+                .name = "tps80031-gpadc",
+        },
+        {
+                .name = "tps80031-fuel-gauge",
+        },
+        {
+                .name = "tps80031-charger",
+        },
+};
+
+static int tps80031_slave_address[TPS80031_NUM_SLAVES] = {
+        TPS80031_I2C_ID0_ADDR,
+        TPS80031_I2C_ID1_ADDR,
+        TPS80031_I2C_ID2_ADDR,
+        TPS80031_I2C_ID3_ADDR,
+};
+
+struct tps80031_pupd_data {
+        u8      reg;
+        u8      pullup_bit;
+        u8      pulldown_bit;
+};
+
+#define TPS80031_IRQ(_reg, _mask)                       \
+        {                                                       \
+                .reg_offset = (TPS80031_INT_MSK_LINE_##_reg) -  \
+                                TPS80031_INT_MSK_LINE_A,        \
+                .mask = BIT(_mask),                             \
+        }
+
+static const struct regmap_irq tps80031_main_irqs[] = {
+        [TPS80031_INT_PWRON]            = TPS80031_IRQ(A, 0),
+        [TPS80031_INT_RPWRON]           = TPS80031_IRQ(A, 1),
+        [TPS80031_INT_SYS_VLOW]         = TPS80031_IRQ(A, 2),
+        [TPS80031_INT_RTC_ALARM]        = TPS80031_IRQ(A, 3),
+        [TPS80031_INT_RTC_PERIOD]       = TPS80031_IRQ(A, 4),
+        [TPS80031_INT_HOT_DIE]          = TPS80031_IRQ(A, 5),
+        [TPS80031_INT_VXX_SHORT]        = TPS80031_IRQ(A, 6),
+        [TPS80031_INT_SPDURATION]       = TPS80031_IRQ(A, 7),
+        [TPS80031_INT_WATCHDOG]         = TPS80031_IRQ(B, 0),
+        [TPS80031_INT_BAT]              = TPS80031_IRQ(B, 1),
+        [TPS80031_INT_SIM]              = TPS80031_IRQ(B, 2),
+        [TPS80031_INT_MMC]              = TPS80031_IRQ(B, 3),
+        [TPS80031_INT_RES]              = TPS80031_IRQ(B, 4),
+        [TPS80031_INT_GPADC_RT]         = TPS80031_IRQ(B, 5),
+        [TPS80031_INT_GPADC_SW2_EOC]    = TPS80031_IRQ(B, 6),
+        [TPS80031_INT_CC_AUTOCAL]       = TPS80031_IRQ(B, 7),
+        [TPS80031_INT_ID_WKUP]          = TPS80031_IRQ(C, 0),
+        [TPS80031_INT_VBUSS_WKUP]       = TPS80031_IRQ(C, 1),
+        [TPS80031_INT_ID]               = TPS80031_IRQ(C, 2),
+        [TPS80031_INT_VBUS]             = TPS80031_IRQ(C, 3),
+        [TPS80031_INT_CHRG_CTRL]        = TPS80031_IRQ(C, 4),
+        [TPS80031_INT_EXT_CHRG]         = TPS80031_IRQ(C, 5),
+        [TPS80031_INT_INT_CHRG]         = TPS80031_IRQ(C, 6),
+        [TPS80031_INT_RES2]             = TPS80031_IRQ(C, 7),
+};
+
+static struct regmap_irq_chip tps80031_irq_chip = {
+        .name = "tps80031",
+        .irqs = tps80031_main_irqs,
+        .num_irqs = ARRAY_SIZE(tps80031_main_irqs),
+        .num_regs = 3,
+        .status_base = TPS80031_INT_STS_A,
+        .mask_base = TPS80031_INT_MSK_LINE_A,
+};
+
+#define PUPD_DATA(_reg, _pulldown_bit, _pullup_bit)     \
+        {                                               \
+                .reg = TPS80031_CFG_INPUT_PUPD##_reg,   \
+                .pulldown_bit = _pulldown_bit,          \
+                .pullup_bit = _pullup_bit,              \
+        }
+
+static const struct tps80031_pupd_data tps80031_pupds[] = {
+        [TPS80031_PREQ1]                = PUPD_DATA(1, BIT(0),  BIT(1)),
+        [TPS80031_PREQ2A]               = PUPD_DATA(1, BIT(2),  BIT(3)),
+        [TPS80031_PREQ2B]               = PUPD_DATA(1, BIT(4),  BIT(5)),
+        [TPS80031_PREQ2C]               = PUPD_DATA(1, BIT(6),  BIT(7)),
+        [TPS80031_PREQ3]                = PUPD_DATA(2, BIT(0),  BIT(1)),
+        [TPS80031_NRES_WARM]            = PUPD_DATA(2, 0,       BIT(2)),
+        [TPS80031_PWM_FORCE]            = PUPD_DATA(2, BIT(5),  0),
+        [TPS80031_CHRG_EXT_CHRG_STATZ]  = PUPD_DATA(2, 0,       BIT(6)),
+        [TPS80031_SIM]                  = PUPD_DATA(3, BIT(0),  BIT(1)),
+        [TPS80031_MMC]                  = PUPD_DATA(3, BIT(2),  BIT(3)),
+        [TPS80031_GPADC_START]          = PUPD_DATA(3, BIT(4),  0),
+        [TPS80031_DVSI2C_SCL]           = PUPD_DATA(4, 0,       BIT(0)),
+        [TPS80031_DVSI2C_SDA]           = PUPD_DATA(4, 0,       BIT(1)),
+        [TPS80031_CTLI2C_SCL]           = PUPD_DATA(4, 0,       BIT(2)),
+        [TPS80031_CTLI2C_SDA]           = PUPD_DATA(4, 0,       BIT(3)),
+};
+static struct tps80031 *tps80031_power_off_dev;
+
+int tps80031_ext_power_req_config(struct device *dev,
+                unsigned long ext_ctrl_flag, int preq_bit,
+                int state_reg_add, int trans_reg_add)
+{
+        u8 res_ass_reg = 0;
+        int preq_mask_bit = 0;
+        int ret;
+
+        if (!(ext_ctrl_flag & TPS80031_EXT_PWR_REQ))
+                return 0;
+
+        if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ1) {
+                res_ass_reg = TPS80031_PREQ1_RES_ASS_A + (preq_bit >> 3);
+                preq_mask_bit = 5;
+        } else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ2) {