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>
diff --git a/drivers/mfd/tps80031.c b/drivers/mfd/tps80031.c
new file mode 100644
index 0000000..f64005e
--- /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) {
+ res_ass_reg = TPS80031_PREQ2_RES_ASS_A + (preq_bit >> 3);
+ preq_mask_bit = 6;
+ } else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ3) {
+ res_ass_reg = TPS80031_PREQ3_RES_ASS_A + (preq_bit >> 3);
+ preq_mask_bit = 7;
+ }
+
+ /* Configure REQ_ASS registers */
+ ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1, res_ass_reg,
+ BIT(preq_bit & 0x7));
+ if (ret < 0) {
+ dev_err(dev, "reg 0x%02x setbit failed, err = %d\n",
+ res_ass_reg, ret);
+ return ret;
+ }
+
+ /* Unmask the PREQ */
+ ret = tps80031_clr_bits(dev, TPS80031_SLAVE_ID1,
+ TPS80031_PHOENIX_MSK_TRANSITION, BIT(preq_mask_bit));
+ if (ret < 0) {
+ dev_err(dev, "reg 0x%02x clrbit failed, err = %d\n",
+ TPS80031_PHOENIX_MSK_TRANSITION, ret);
+ return ret;
+ }
+
+ /* Switch regulator control to resource now */
+ if (ext_ctrl_flag & (TPS80031_PWR_REQ_INPUT_PREQ2 |
+ TPS80031_PWR_REQ_INPUT_PREQ3)) {
+ ret = tps80031_update(dev, TPS80031_SLAVE_ID1, state_reg_add,
+ 0x0, TPS80031_STATE_MASK);
+ if (ret < 0)
+ dev_err(dev, "reg 0x%02x update failed, err = %d\n",
+ state_reg_add, ret);
+ } else {
+ ret = tps80031_update(dev, TPS80031_SLAVE_ID1, trans_reg_add,
+ TPS80031_TRANS_SLEEP_OFF,
+ TPS80031_TRANS_SLEEP_MASK);
+ if (ret < 0)
+ dev_err(dev, "reg 0x%02x update failed, err = %d\n",
+ trans_reg_add, ret);
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(tps80031_ext_power_req_config);
+
+static void tps80031_power_off(void)
+{
+ dev_info(tps80031_power_off_dev->dev, "switching off PMU\n");
+ tps80031_write(tps80031_power_off_dev->dev, TPS80031_SLAVE_ID1,
+ TPS80031_PHOENIX_DEV_ON, TPS80031_DEVOFF);
+}
+
+static void tps80031_pupd_init(struct tps80031 *tps80031,
+ struct tps80031_platform_data *pdata)
+{
+ struct tps80031_pupd_init_data *pupd_init_data = pdata->pupd_init_data;
+ int data_size = pdata->pupd_init_data_size;
+ int i;
+
+ for (i = 0; i < data_size; ++i) {
+ struct tps80031_pupd_init_data *pupd_init = &pupd_init_data[i];
+ const struct tps80031_pupd_data *pupd =
+ &tps80031_pupds[pupd_init->input_pin];
+ u8 update_value = 0;
+ u8 update_mask = pupd->pulldown_bit | pupd->pullup_bit;
+
+ if (pupd_init->setting == TPS80031_PUPD_PULLDOWN)
+ update_value = pupd->pulldown_bit;
+ else if (pupd_init->setting == TPS80031_PUPD_PULLUP)
+ update_value = pupd->pullup_bit;
+
+ tps80031_update(tps80031->dev, TPS80031_SLAVE_ID1, pupd->reg,
+ update_value, update_mask);
+ }
+}
+
+static int tps80031_init_ext_control(struct tps80031 *tps80031,
+ struct tps80031_platform_data *pdata)
+{
+ struct device *dev = tps80031->dev;
+ int ret;
+ int i;
+
+ /* Clear all external control for this rail */
+ for (i = 0; i < 9; ++i) {
+ ret = tps80031_write(dev, TPS80031_SLAVE_ID1,
+ TPS80031_PREQ1_RES_ASS_A + i, 0);
+ if (ret < 0) {
+ dev_err(dev, "reg 0x%02x write failed, err = %d\n",
+ TPS80031_PREQ1_RES_ASS_A + i, ret);
+ return ret;
+ }
+ }
+
+ /* Mask the PREQ */
+ ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1,
+ TPS80031_PHOENIX_MSK_TRANSITION, 0x7 << 5);
+ if (ret < 0) {
+ dev_err(dev, "reg 0x%02x set_bits failed, err = %d\n",
+ TPS80031_PHOENIX_MSK_TRANSITION, ret);
+ return ret;
+ }
+ return ret;
+}
+
+static int __devinit tps80031_irq_init(struct tps80031 *tps80031, int irq,
+ int irq_base)
+{
+ struct device *dev = tps80031->dev;
+ int i, ret;
+
+ /*
+ * The MASK register used for updating status register when
+ * interrupt occurs and LINE register used to pass the status
+ * to actual interrupt line. As per datasheet:
+ * When INT_MSK_LINE [i] is set to 1, the associated interrupt
+ * number i is INT line masked, which means that no interrupt is
+ * generated on the INT line.
+ * When INT_MSK_LINE [i] is set to 0, the associated interrupt
+ * number i is line enabled: An interrupt is generated on the
+ * INT line.
+ * In any case, the INT_STS [i] status bit may or may not be updated,
+ * only linked to the INT_MSK_STS [i] configuration register bit.
+ *
+ * When INT_MSK_STS [i] is set to 1, the associated interrupt number
+ * i is status masked, which means that no interrupt is stored in
+ * the INT_STS[i] status bit. Note that no interrupt number i is
+ * generated on the INT line, even if the INT_MSK_LINE [i] register
+ * bit is set to 0.
+ * When INT_MSK_STS [i] is set to 0, the associated interrupt number i
+ * is status enabled: An interrupt status is updated in the INT_STS [i]
+ * register. The interrupt may or may not be generated on the INT line,
+ * depending on the INT_MSK_LINE [i] configuration register bit.
+ */
+ for (i = 0; i < 3; i++)
+ tps80031_write(dev, TPS80031_SLAVE_ID2,
+ TPS80031_INT_MSK_STS_A + i, 0x00);
+
+ ret = regmap_add_irq_chip(tps80031->regmap[TPS80031_SLAVE_ID2], irq,
+ IRQF_ONESHOT, irq_base,
+ &tps80031_irq_chip, &tps80031->irq_data);
+ if (ret < 0) {
+ dev_err(dev, "add irq failed, err = %d\n", ret);
+ return ret;
+ }
+ return ret;
+}
+
+static bool rd_wr_reg_id0(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS80031_SMPS1_CFG_FORCE ... TPS80031_SMPS2_CFG_VOLTAGE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rd_wr_reg_id1(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS80031_SECONDS_REG ... TPS80031_RTC_RESET_STATUS_REG:
+ case TPS80031_VALIDITY0 ... TPS80031_VALIDITY7:
+ case TPS80031_PHOENIX_START_CONDITION ... TPS80031_KEY_PRESS_DUR_CFG:
+ case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
+ case TPS80031_BROADCAST_ADDR_ALL ... TPS80031_BROADCAST_ADDR_CLK_RST:
+ case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
+ case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
+ case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
+ case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
+ case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
+ case TPS80031_BACKUP_REG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool is_volatile_reg_id1(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
+ case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
+ case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
+ case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
+ case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
+ case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rd_wr_reg_id2(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS80031_USB_VENDOR_ID_LSB ... TPS80031_USB_OTG_REVISION:
+ case TPS80031_GPADC_CTRL ... TPS80031_CTRL_P1:
+ case TPS80031_RTCH0_LSB ... TPS80031_GPCH0_MSB:
+ case TPS80031_TOGGLE1 ... TPS80031_VIBMODE:
+ case TPS80031_PWM1ON ... TPS80031_PWM2OFF:
+ case TPS80031_FG_REG_00 ... TPS80031_FG_REG_11:
+ case TPS80031_INT_STS_A ... TPS80031_INT_MSK_STS_C:
+ case TPS80031_CONTROLLER_CTRL2 ... TPS80031_LED_PWM_CTRL2:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rd_wr_reg_id3(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS80031_GPADC_TRIM0 ... TPS80031_GPADC_TRIM18:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config tps80031_regmap_configs[] = {
+ {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = rd_wr_reg_id0,
+ .readable_reg = rd_wr_reg_id0,
+ .max_register = TPS80031_MAX_REGISTER,
+ },
+ {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = rd_wr_reg_id1,
+ .readable_reg = rd_wr_reg_id1,
+ .volatile_reg = is_volatile_reg_id1,
+ .max_register = TPS80031_MAX_REGISTER,
+ },
+ {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = rd_wr_reg_id2,
+ .readable_reg = rd_wr_reg_id2,
+ .max_register = TPS80031_MAX_REGISTER,
+ },
+ {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = rd_wr_reg_id3,
+ .readable_reg = rd_wr_reg_id3,
+ .max_register = TPS80031_MAX_REGISTER,
+ },
+};
+
+static int __devinit tps80031_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tps80031_platform_data *pdata = client->dev.platform_data;
+ struct tps80031 *tps80031;
+ int ret;
+ uint8_t es_version;
+ uint8_t ep_ver;
+ int i;
+
+ if (!pdata) {
+ dev_err(&client->dev, "tps80031 requires platform data\n");
+ return -EINVAL;
+ }
+
+ tps80031 = devm_kzalloc(&client->dev, sizeof(*tps80031), GFP_KERNEL);
+ if (!tps80031) {
+ dev_err(&client->dev, "Malloc failed for tps80031\n");
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
+ if (tps80031_slave_address[i] == client->addr)
+ tps80031->clients[i] = client;
+ else
+ tps80031->clients[i] = i2c_new_dummy(client->adapter,
+ tps80031_slave_address[i]);
+ if (!tps80031->clients[i]) {
+ dev_err(&client->dev, "can't attach client %d\n", i);
+ ret = -ENOMEM;
+ goto fail_client_reg;
+ }
+
+ i2c_set_clientdata(tps80031->clients[i], tps80031);
+ tps80031->regmap[i] = devm_regmap_init_i2c(tps80031->clients[i],
+ &tps80031_regmap_configs[i]);
+ if (IS_ERR(tps80031->regmap[i])) {
+ ret = PTR_ERR(tps80031->regmap[i]);
+ dev_err(&client->dev,
+ "regmap %d init failed, err %d\n", i, ret);
+ goto fail_client_reg;
+ }
+ }
+
+ ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
+ TPS80031_JTAGVERNUM, &es_version);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "Silicon version number read failed: %d\n", ret);
+ goto fail_client_reg;
+ }
+
+ ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
+ TPS80031_EPROM_REV, &ep_ver);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "Silicon eeprom version read failed: %d\n", ret);
+ goto fail_client_reg;
+ }
+
+ dev_info(&client->dev, "ES version 0x%02x and EPROM version 0x%02x\n",
+ es_version, ep_ver);
+ tps80031->es_version = es_version;
+ tps80031->dev = &client->dev;
+ i2c_set_clientdata(client, tps80031);
+ tps80031->chip_info = id->driver_data;
+
+ ret = tps80031_irq_init(tps80031, client->irq, pdata->irq_base);
+ if (ret) {
+ dev_err(&client->dev, "IRQ init failed: %d\n", ret);
+ goto fail_client_reg;
+ }
+
+ tps80031_pupd_init(tps80031, pdata);
+
+ tps80031_init_ext_control(tps80031, pdata);
+
+ ret = mfd_add_devices(tps80031->dev, -1,
+ tps80031_cell, ARRAY_SIZE(tps80031_cell),
+ NULL, 0,
+ regmap_irq_get_domain(tps80031->irq_data));
+ if (ret < 0) {
+ dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
+ goto fail_mfd_add;
+ }
+
+ if (pdata->use_power_off && !pm_power_off) {
+ tps80031_power_off_dev = tps80031;
+ pm_power_off = tps80031_power_off;
+ }
+ return 0;
+
+fail_mfd_add:
+ regmap_del_irq_chip(client->irq, tps80031->irq_data);
+
+fail_client_reg:
+ for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
+ if (tps80031->clients[i] && (tps80031->clients[i] != client))
+ i2c_unregister_device(tps80031->clients[i]);
+ }
+ return ret;
+}
+
+static int __devexit tps80031_remove(struct i2c_client *client)
+{
+ struct tps80031 *tps80031 = i2c_get_clientdata(client);
+ int i;
+
+ if (tps80031_power_off_dev == tps80031) {
+ tps80031_power_off_dev = NULL;
+ pm_power_off = NULL;
+ }
+
+ mfd_remove_devices(tps80031->dev);
+
+ regmap_del_irq_chip(client->irq, tps80031->irq_data);
+
+ for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
+ if (tps80031->clients[i] != client)
+ i2c_unregister_device(tps80031->clients[i]);
+ }
+ return 0;
+}
+
+static const struct i2c_device_id tps80031_id_table[] = {
+ { "tps80031", TPS80031 },
+ { "tps80032", TPS80032 },
+};
+MODULE_DEVICE_TABLE(i2c, tps80031_id_table);
+
+static struct i2c_driver tps80031_driver = {
+ .driver = {
+ .name = "tps80031",
+ .owner = THIS_MODULE,
+ },
+ .probe = tps80031_probe,
+ .remove = __devexit_p(tps80031_remove),
+ .id_table = tps80031_id_table,
+};
+
+static int __init tps80031_init(void)
+{
+ return i2c_add_driver(&tps80031_driver);
+}
+subsys_initcall(tps80031_init);
+
+static void __exit tps80031_exit(void)
+{
+ i2c_del_driver(&tps80031_driver);
+}
+module_exit(tps80031_exit);
+
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_DESCRIPTION("TPS80031 core driver");
+MODULE_LICENSE("GPL v2");