@@ -642,6 +642,19 @@ config MFD_IPAQ_MICRO
AT90LS8535 microcontroller flashed with a special iPAQ
firmware using the custom protocol implemented in this driver.
+config MFD_IQS62X
+ tristate "Azoteq IQS620A/621/622/624/625 core support"
+ depends on I2C
+ select MFD_CORE
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build core support for the Azoteq IQS620A,
+ IQS621, IQS622, IQS624 and IQS625 multi-function sensors. Additional
+ options must be selected to enable device-specific functions.
+
+ To compile this driver as a module, choose M here: the module will
+ be called iqs62x.
+
config MFD_JANZ_CMODIO
tristate "Janz CMOD-IO PCI MODULbus Carrier Board"
select MFD_CORE
@@ -226,6 +226,7 @@ obj-$(CONFIG_MFD_AS3711) += as3711.o
obj-$(CONFIG_MFD_AS3722) += as3722.o
obj-$(CONFIG_MFD_STW481X) += stw481x.o
obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
+obj-$(CONFIG_MFD_IQS62X) += iqs62x.o
obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
obj-$(CONFIG_MFD_HI655X_PMIC) += hi655x-pmic.o
new file mode 100644
@@ -0,0 +1,1063 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Azoteq IQS620A/621/622/624/625 Multi-Function Sensors
+ *
+ * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
+ *
+ * These devices rely on application-specific register settings and calibration
+ * data developed in and exported from a suite of GUIs offered by the vendor. A
+ * separate tool converts the GUIs' ASCII-based output into a standard firmware
+ * file parsed by the driver.
+ *
+ * Link to datasheets and GUIs: https://www.azoteq.com/
+ *
+ * Link to conversion tool: https://github.com/jlabundy/iqs62x-h2bin.git
+ */
+
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/iqs62x.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of_device.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#define IQS62X_PROD_NUM 0x00
+
+#define IQS62X_SYS_FLAGS 0x10
+#define IQS62X_SYS_FLAGS_IN_ATI BIT(2)
+
+#define IQS620_HALL_FLAGS 0x16
+#define IQS621_HALL_FLAGS 0x19
+#define IQS622_HALL_FLAGS IQS621_HALL_FLAGS
+
+#define IQS624_INTERVAL_NUM 0x18
+#define IQS625_INTERVAL_NUM 0x12
+
+#define IQS622_PROX_SETTINGS_4 0x48
+#define IQS620_PROX_SETTINGS_4 0x50
+#define IQS620_PROX_SETTINGS_4_SAR_EN BIT(7)
+
+#define IQS621_ALS_CAL_DIV_LUX 0x82
+#define IQS621_ALS_CAL_DIV_IR 0x83
+
+#define IQS620_TEMP_CAL_MULT 0xC2
+#define IQS620_TEMP_CAL_DIV 0xC3
+#define IQS620_TEMP_CAL_OFFS 0xC4
+
+#define IQS62X_SYS_SETTINGS 0xD0
+#define IQS62X_SYS_SETTINGS_SOFT_RESET BIT(7)
+#define IQS62X_SYS_SETTINGS_ACK_RESET BIT(6)
+#define IQS62X_SYS_SETTINGS_EVENT_MODE BIT(5)
+#define IQS62X_SYS_SETTINGS_CLK_DIV BIT(4)
+#define IQS62X_SYS_SETTINGS_REDO_ATI BIT(1)
+
+#define IQS62X_PWR_SETTINGS 0xD2
+#define IQS62X_PWR_SETTINGS_DIS_AUTO BIT(5)
+#define IQS62X_PWR_SETTINGS_PWR_MODE_MASK (BIT(4) | BIT(3))
+#define IQS62X_PWR_SETTINGS_PWR_MODE_HALT (BIT(4) | BIT(3))
+#define IQS62X_PWR_SETTINGS_PWR_MODE_NORM 0
+
+#define IQS62X_OTP_CMD 0xF0
+#define IQS62X_OTP_CMD_FG3 0x13
+#define IQS62X_OTP_DATA 0xF1
+#define IQS62X_MAX_REG 0xFF
+
+#define IQS62X_HALL_CAL_MASK GENMASK(3, 0)
+
+#define IQS62X_FW_REC_TYPE_INFO 0
+#define IQS62X_FW_REC_TYPE_PROD 1
+#define IQS62X_FW_REC_TYPE_HALL 2
+#define IQS62X_FW_REC_TYPE_MASK 3
+#define IQS62X_FW_REC_TYPE_DATA 4
+
+#define IQS62X_ATI_POLL_SLEEP_US 10000
+#define IQS62X_ATI_POLL_TIMEOUT_US 500000
+#define IQS62X_ATI_STABLE_DELAY_MS 150
+
+struct iqs62x_fw_rec {
+ u8 type;
+ u8 addr;
+ u8 len;
+ u8 data;
+} __packed;
+
+struct iqs62x_fw_blk {
+ struct list_head list;
+ u8 addr;
+ u8 mask;
+ u8 len;
+ u8 data[];
+};
+
+struct iqs62x_info {
+ u8 prod_num;
+ u8 sw_num;
+ u8 hw_num;
+} __packed;
+
+static int iqs62x_dev_init(struct iqs62x_core *iqs62x)
+{
+ struct iqs62x_fw_blk *fw_blk;
+ unsigned int val;
+ int ret;
+ u8 clk_div = 1;
+
+ list_for_each_entry(fw_blk, &iqs62x->fw_blk_head, list) {
+ if (fw_blk->mask)
+ ret = regmap_update_bits(iqs62x->regmap, fw_blk->addr,
+ fw_blk->mask, *fw_blk->data);
+ else
+ ret = regmap_raw_write(iqs62x->regmap, fw_blk->addr,
+ fw_blk->data, fw_blk->len);
+ if (ret)
+ return ret;
+ }
+
+ switch (iqs62x->dev_desc->prod_num) {
+ case IQS620_PROD_NUM:
+ case IQS622_PROD_NUM:
+ ret = regmap_read(iqs62x->regmap,
+ iqs62x->dev_desc->prox_settings, &val);
+ if (ret)
+ return ret;
+
+ if (val & IQS620_PROX_SETTINGS_4_SAR_EN)
+ iqs62x->ui_sel = IQS62X_UI_SAR1;
+
+ /* fall through */
+
+ case IQS621_PROD_NUM:
+ ret = regmap_write(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
+ IQS620_GLBL_EVENT_MASK_PMU |
+ iqs62x->dev_desc->prox_mask |
+ iqs62x->dev_desc->sar_mask |
+ iqs62x->dev_desc->hall_mask |
+ iqs62x->dev_desc->hyst_mask |
+ iqs62x->dev_desc->temp_mask |
+ iqs62x->dev_desc->als_mask |
+ iqs62x->dev_desc->ir_mask);
+ if (ret)
+ return ret;
+ break;
+
+ default:
+ ret = regmap_write(iqs62x->regmap, IQS624_HALL_UI,
+ IQS624_HALL_UI_WHL_EVENT |
+ IQS624_HALL_UI_INT_EVENT |
+ IQS624_HALL_UI_AUTO_CAL);
+ if (ret)
+ return ret;
+
+ /*
+ * The IQS625 default interval divider is below the minimum
+ * permissible value, and the datasheet mandates that it is
+ * corrected during initialization (unless an updated value
+ * has already been provided by firmware).
+ *
+ * To protect against an unacceptably low user-entered value
+ * stored in the firmware, the same check is extended to the
+ * IQS624 as well.
+ */
+ ret = regmap_read(iqs62x->regmap, IQS624_INTERVAL_DIV, &val);
+ if (ret)
+ return ret;
+
+ if (val >= iqs62x->dev_desc->interval_div)
+ break;
+
+ ret = regmap_write(iqs62x->regmap, IQS624_INTERVAL_DIV,
+ iqs62x->dev_desc->interval_div);
+ if (ret)
+ return ret;
+ }
+
+ ret = regmap_read(iqs62x->regmap, IQS62X_SYS_SETTINGS, &val);
+ if (ret)
+ return ret;
+
+ if (val & IQS62X_SYS_SETTINGS_CLK_DIV)
+ clk_div = iqs62x->dev_desc->clk_div;
+
+ ret = regmap_write(iqs62x->regmap, IQS62X_SYS_SETTINGS, val |
+ IQS62X_SYS_SETTINGS_ACK_RESET |
+ IQS62X_SYS_SETTINGS_EVENT_MODE |
+ IQS62X_SYS_SETTINGS_REDO_ATI);
+ if (ret)
+ return ret;
+
+ ret = regmap_read_poll_timeout(iqs62x->regmap, IQS62X_SYS_FLAGS, val,
+ !(val & IQS62X_SYS_FLAGS_IN_ATI),
+ IQS62X_ATI_POLL_SLEEP_US,
+ IQS62X_ATI_POLL_TIMEOUT_US * clk_div);
+ if (ret)
+ return ret;
+
+ msleep(IQS62X_ATI_STABLE_DELAY_MS * clk_div);
+
+ return 0;
+}
+
+static int iqs62x_firmware_parse(struct iqs62x_core *iqs62x,
+ const struct firmware *fw)
+{
+ struct i2c_client *client = iqs62x->client;
+ struct iqs62x_fw_rec *fw_rec;
+ struct iqs62x_fw_blk *fw_blk;
+ unsigned int val;
+ size_t pos = 0;
+ int ret = 0;
+ u8 mask, len, *data;
+ u8 hall_cal_index = 0;
+
+ while (pos < fw->size) {
+ if (pos + sizeof(*fw_rec) > fw->size) {
+ ret = -EINVAL;
+ break;
+ }
+ fw_rec = (struct iqs62x_fw_rec *)(fw->data + pos);
+ pos += sizeof(*fw_rec);
+
+ if (pos + fw_rec->len - 1 > fw->size) {
+ ret = -EINVAL;
+ break;
+ }
+ pos += fw_rec->len - 1;
+
+ switch (fw_rec->type) {
+ case IQS62X_FW_REC_TYPE_INFO:
+ continue;
+
+ case IQS62X_FW_REC_TYPE_PROD:
+ if (fw_rec->data == iqs62x->dev_desc->prod_num)
+ continue;
+
+ dev_err(&client->dev,
+ "Incompatible product number: 0x%02X\n",
+ fw_rec->data);
+ ret = -EINVAL;
+ break;
+
+ case IQS62X_FW_REC_TYPE_HALL:
+ if (!hall_cal_index) {
+ ret = regmap_write(iqs62x->regmap,
+ IQS62X_OTP_CMD,
+ IQS62X_OTP_CMD_FG3);
+ if (ret)
+ break;
+
+ ret = regmap_read(iqs62x->regmap,
+ IQS62X_OTP_DATA, &val);
+ if (ret)
+ break;
+
+ hall_cal_index = val & IQS62X_HALL_CAL_MASK;
+ if (!hall_cal_index) {
+ dev_err(&client->dev,
+ "Uncalibrated device\n");
+ ret = -ENODATA;
+ break;
+ }
+ }
+
+ if (hall_cal_index > fw_rec->len) {
+ ret = -EINVAL;
+ break;
+ }
+
+ mask = 0;
+ data = &fw_rec->data + hall_cal_index - 1;
+ len = sizeof(*data);
+ break;
+
+ case IQS62X_FW_REC_TYPE_MASK:
+ if (fw_rec->len < (sizeof(mask) + sizeof(*data))) {
+ ret = -EINVAL;
+ break;
+ }
+
+ mask = fw_rec->data;
+ data = &fw_rec->data + sizeof(mask);
+ len = sizeof(*data);
+ break;
+
+ case IQS62X_FW_REC_TYPE_DATA:
+ mask = 0;
+ data = &fw_rec->data;
+ len = fw_rec->len;
+ break;
+
+ default:
+ dev_err(&client->dev,
+ "Unrecognized record type: 0x%02X\n",
+ fw_rec->type);
+ ret = -EINVAL;
+ }
+
+ if (ret)
+ break;
+
+ fw_blk = devm_kzalloc(&client->dev,
+ struct_size(fw_blk, data, len),
+ GFP_KERNEL);
+ if (!fw_blk) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ fw_blk->addr = fw_rec->addr;
+ fw_blk->mask = mask;
+ fw_blk->len = len;
+ memcpy(fw_blk->data, data, len);
+
+ list_add(&fw_blk->list, &iqs62x->fw_blk_head);
+ }
+
+ release_firmware(fw);
+
+ return ret;
+}
+
+const struct iqs62x_event_desc iqs62x_events[IQS62X_NUM_EVENTS] = {
+ [IQS62X_EVENT_PROX_CH0_T] = {
+ .reg = IQS62X_EVENT_PROX,
+ .mask = BIT(4),
+ .val = BIT(4),
+ },
+ [IQS62X_EVENT_PROX_CH0_P] = {
+ .reg = IQS62X_EVENT_PROX,
+ .mask = BIT(0),
+ .val = BIT(0),
+ },
+ [IQS62X_EVENT_PROX_CH1_T] = {
+ .reg = IQS62X_EVENT_PROX,
+ .mask = BIT(5),
+ .val = BIT(5),
+ },
+ [IQS62X_EVENT_PROX_CH1_P] = {
+ .reg = IQS62X_EVENT_PROX,
+ .mask = BIT(1),
+ .val = BIT(1),
+ },
+ [IQS62X_EVENT_PROX_CH2_T] = {
+ .reg = IQS62X_EVENT_PROX,
+ .mask = BIT(6),
+ .val = BIT(6),
+ },
+ [IQS62X_EVENT_PROX_CH2_P] = {
+ .reg = IQS62X_EVENT_PROX,
+ .mask = BIT(2),
+ .val = BIT(2),
+ },
+ [IQS62X_EVENT_HYST_POS_T] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(6) | BIT(7),
+ .val = BIT(6),
+ },
+ [IQS62X_EVENT_HYST_POS_P] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(5) | BIT(7),
+ .val = BIT(5),
+ },
+ [IQS62X_EVENT_HYST_NEG_T] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(6) | BIT(7),
+ .val = BIT(6) | BIT(7),
+ },
+ [IQS62X_EVENT_HYST_NEG_P] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(5) | BIT(7),
+ .val = BIT(5) | BIT(7),
+ },
+ [IQS62X_EVENT_SAR1_ACT] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(4),
+ .val = BIT(4),
+ },
+ [IQS62X_EVENT_SAR1_QRD] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(2),
+ .val = BIT(2),
+ },
+ [IQS62X_EVENT_SAR1_MOVE] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(1),
+ .val = BIT(1),
+ },
+ [IQS62X_EVENT_SAR1_HALT] = {
+ .reg = IQS62X_EVENT_HYST,
+ .mask = BIT(0),
+ .val = BIT(0),
+ },
+ [IQS62X_EVENT_WHEEL_UP] = {
+ .reg = IQS62X_EVENT_WHEEL,
+ .mask = BIT(7) | BIT(6),
+ .val = BIT(7),
+ },
+ [IQS62X_EVENT_WHEEL_DN] = {
+ .reg = IQS62X_EVENT_WHEEL,
+ .mask = BIT(7) | BIT(6),
+ .val = BIT(7) | BIT(6),
+ },
+ [IQS62X_EVENT_HALL_N_T] = {
+ .reg = IQS62X_EVENT_HALL,
+ .mask = BIT(2) | BIT(0),
+ .val = BIT(2),
+ },
+ [IQS62X_EVENT_HALL_N_P] = {
+ .reg = IQS62X_EVENT_HALL,
+ .mask = BIT(1) | BIT(0),
+ .val = BIT(1),
+ },
+ [IQS62X_EVENT_HALL_S_T] = {
+ .reg = IQS62X_EVENT_HALL,
+ .mask = BIT(2) | BIT(0),
+ .val = BIT(2) | BIT(0),
+ },
+ [IQS62X_EVENT_HALL_S_P] = {
+ .reg = IQS62X_EVENT_HALL,
+ .mask = BIT(1) | BIT(0),
+ .val = BIT(1) | BIT(0),
+ },
+ [IQS62X_EVENT_SYS_RESET] = {
+ .reg = IQS62X_EVENT_SYS,
+ .mask = BIT(7),
+ .val = BIT(7),
+ },
+};
+EXPORT_SYMBOL_GPL(iqs62x_events);
+
+static irqreturn_t iqs62x_irq(int irq, void *context)
+{
+ struct iqs62x_core *iqs62x = context;
+ struct i2c_client *client = iqs62x->client;
+ struct iqs62x_event_data event_data;
+ struct iqs62x_event_desc event_desc;
+ enum iqs62x_event_reg event_reg;
+ unsigned long event_flags = 0;
+ int ret, i, j;
+ u8 event_map[IQS62X_EVENT_SIZE];
+
+ /*
+ * The device asserts the RDY output to signal the beginning of a
+ * communication window, which is closed by an I2C stop condition.
+ * As such, all interrupt status is captured in a single read and
+ * broadcast to any interested sub-device drivers.
+ */
+ ret = regmap_raw_read(iqs62x->regmap, IQS62X_SYS_FLAGS, event_map,
+ sizeof(event_map));
+ if (ret) {
+ dev_err(&client->dev, "Failed to read device status: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ for (i = 0; i < sizeof(event_map); i++) {
+ event_reg = iqs62x->dev_desc->event_regs[iqs62x->ui_sel][i];
+
+ switch (event_reg) {
+ case IQS62X_EVENT_UI_LO:
+ event_data.ui_data = get_unaligned_le16(&event_map[i]);
+
+ /* fall through */
+
+ case IQS62X_EVENT_UI_HI:
+ case IQS62X_EVENT_NONE:
+ continue;
+
+ case IQS62X_EVENT_ALS:
+ event_data.als_flags = event_map[i];
+ continue;
+
+ case IQS62X_EVENT_IR:
+ event_data.ir_flags = event_map[i];
+ continue;
+
+ case IQS62X_EVENT_INTER:
+ event_data.interval = event_map[i];
+ continue;
+
+ case IQS62X_EVENT_HYST:
+ event_map[i] <<= iqs62x->dev_desc->hyst_shift;
+
+ /* fall through */
+
+ case IQS62X_EVENT_WHEEL:
+ case IQS62X_EVENT_HALL:
+ case IQS62X_EVENT_PROX:
+ case IQS62X_EVENT_SYS:
+ break;
+ }
+
+ for (j = 0; j < IQS62X_NUM_EVENTS; j++) {
+ event_desc = iqs62x_events[j];
+
+ if (event_desc.reg != event_reg)
+ continue;
+
+ if ((event_map[i] & event_desc.mask) == event_desc.val)
+ event_flags |= BIT(j);
+ }
+ }
+
+ /*
+ * The device resets itself in response to the I2C master stalling
+ * communication past a fixed timeout. In this case, all registers
+ * are restored and any interested sub-device drivers are notified.
+ */
+ if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) {
+ dev_err(&client->dev, "Unexpected device reset\n");
+
+ ret = iqs62x_dev_init(iqs62x);
+ if (ret) {
+ dev_err(&client->dev,
+ "Failed to re-initialize device: %d\n", ret);
+ return IRQ_NONE;
+ }
+ }
+
+ ret = blocking_notifier_call_chain(&iqs62x->nh, event_flags,
+ &event_data);
+ if (ret & NOTIFY_STOP_MASK)
+ return IRQ_NONE;
+
+ /*
+ * Once the communication window is closed, a small delay is added to
+ * ensure the device's RDY output has been deasserted by the time the
+ * interrupt handler returns.
+ */
+ usleep_range(50, 100);
+
+ return IRQ_HANDLED;
+}
+
+static void iqs62x_firmware_load(const struct firmware *fw, void *context)
+{
+ struct iqs62x_core *iqs62x = context;
+ struct i2c_client *client = iqs62x->client;
+ int ret;
+
+ if (fw) {
+ ret = iqs62x_firmware_parse(iqs62x, fw);
+ if (ret) {
+ dev_err(&client->dev, "Failed to parse firmware: %d\n",
+ ret);
+ goto err_out;
+ }
+ }
+
+ ret = iqs62x_dev_init(iqs62x);
+ if (ret) {
+ dev_err(&client->dev, "Failed to initialize device: %d\n", ret);
+ goto err_out;
+ }
+
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, iqs62x_irq, IRQF_ONESHOT,
+ client->name, iqs62x);
+ if (ret) {
+ dev_err(&client->dev, "Failed to request IRQ: %d\n", ret);
+ goto err_out;
+ }
+
+ ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
+ iqs62x->dev_desc->sub_devs,
+ iqs62x->dev_desc->num_sub_devs,
+ NULL, 0, NULL);
+ if (ret)
+ dev_err(&client->dev, "Failed to add sub-devices: %d\n", ret);
+
+err_out:
+ complete_all(&iqs62x->fw_done);
+}
+
+static const struct mfd_cell iqs620at_sub_devs[] = {
+ {
+ .name = "iqs62x-keys",
+ .of_compatible = "azoteq,iqs620a-keys",
+ },
+ {
+ .name = "iqs620a-pwm",
+ .of_compatible = "azoteq,iqs620a-pwm",
+ },
+ { .name = "iqs620at-temp", },
+};
+
+static const struct mfd_cell iqs620a_sub_devs[] = {
+ {
+ .name = "iqs62x-keys",
+ .of_compatible = "azoteq,iqs620a-keys",
+ },
+ {
+ .name = "iqs620a-pwm",
+ .of_compatible = "azoteq,iqs620a-pwm",
+ },
+};
+
+static const struct mfd_cell iqs621_sub_devs[] = {
+ {
+ .name = "iqs62x-keys",
+ .of_compatible = "azoteq,iqs621-keys",
+ },
+ { .name = "iqs621-als", },
+};
+
+static const struct mfd_cell iqs622_sub_devs[] = {
+ {
+ .name = "iqs62x-keys",
+ .of_compatible = "azoteq,iqs622-keys",
+ },
+ { .name = "iqs621-als", },
+};
+
+static const struct mfd_cell iqs624_sub_devs[] = {
+ {
+ .name = "iqs62x-keys",
+ .of_compatible = "azoteq,iqs624-keys",
+ },
+ { .name = "iqs624-pos", },
+};
+
+static const struct mfd_cell iqs625_sub_devs[] = {
+ {
+ .name = "iqs62x-keys",
+ .of_compatible = "azoteq,iqs625-keys",
+ },
+ { .name = "iqs624-pos", },
+};
+
+static const u8 iqs620at_cal_regs[] = {
+ IQS620_TEMP_CAL_MULT,
+ IQS620_TEMP_CAL_DIV,
+ IQS620_TEMP_CAL_OFFS,
+};
+
+static const u8 iqs621_cal_regs[] = {
+ IQS621_ALS_CAL_DIV_LUX,
+ IQS621_ALS_CAL_DIV_IR,
+};
+
+static const enum iqs62x_event_reg iqs620a_event_regs[][IQS62X_EVENT_SIZE] = {
+ [IQS62X_UI_PROX] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_PROX, /* 0x12 */
+ IQS62X_EVENT_HYST, /* 0x13 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_HALL, /* 0x16 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ },
+ [IQS62X_UI_SAR1] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_HYST, /* 0x13 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_HALL, /* 0x16 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ },
+};
+
+static const enum iqs62x_event_reg iqs621_event_regs[][IQS62X_EVENT_SIZE] = {
+ [IQS62X_UI_PROX] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_PROX, /* 0x12 */
+ IQS62X_EVENT_HYST, /* 0x13 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_ALS, /* 0x16 */
+ IQS62X_EVENT_UI_LO, /* 0x17 */
+ IQS62X_EVENT_UI_HI, /* 0x18 */
+ IQS62X_EVENT_HALL, /* 0x19 */
+ },
+};
+
+static const enum iqs62x_event_reg iqs622_event_regs[][IQS62X_EVENT_SIZE] = {
+ [IQS62X_UI_PROX] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_PROX, /* 0x12 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_ALS, /* 0x14 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_IR, /* 0x16 */
+ IQS62X_EVENT_UI_LO, /* 0x17 */
+ IQS62X_EVENT_UI_HI, /* 0x18 */
+ IQS62X_EVENT_HALL, /* 0x19 */
+ },
+ [IQS62X_UI_SAR1] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_HYST, /* 0x13 */
+ IQS62X_EVENT_ALS, /* 0x14 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_IR, /* 0x16 */
+ IQS62X_EVENT_UI_LO, /* 0x17 */
+ IQS62X_EVENT_UI_HI, /* 0x18 */
+ IQS62X_EVENT_HALL, /* 0x19 */
+ },
+};
+
+static const enum iqs62x_event_reg iqs624_event_regs[][IQS62X_EVENT_SIZE] = {
+ [IQS62X_UI_PROX] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_PROX, /* 0x12 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_WHEEL, /* 0x14 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_UI_LO, /* 0x16 */
+ IQS62X_EVENT_UI_HI, /* 0x17 */
+ IQS62X_EVENT_INTER, /* 0x18 */
+ IQS62X_EVENT_NONE,
+ },
+};
+
+static const enum iqs62x_event_reg iqs625_event_regs[][IQS62X_EVENT_SIZE] = {
+ [IQS62X_UI_PROX] = {
+ IQS62X_EVENT_SYS, /* 0x10 */
+ IQS62X_EVENT_PROX, /* 0x11 */
+ IQS62X_EVENT_INTER, /* 0x12 */
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_NONE,
+ },
+};
+
+static const struct iqs62x_dev_desc iqs62x_devs[] = {
+ {
+ .dev_name = "iqs620at",
+ .sub_devs = iqs620at_sub_devs,
+ .num_sub_devs = ARRAY_SIZE(iqs620at_sub_devs),
+
+ .prod_num = IQS620_PROD_NUM,
+ .sw_num = 0x08,
+ .cal_regs = iqs620at_cal_regs,
+ .num_cal_regs = ARRAY_SIZE(iqs620at_cal_regs),
+
+ .prox_mask = BIT(0),
+ .sar_mask = BIT(1) | BIT(7),
+ .hall_mask = BIT(2),
+ .hyst_mask = BIT(3),
+ .temp_mask = BIT(4),
+
+ .prox_settings = IQS620_PROX_SETTINGS_4,
+ .hall_flags = IQS620_HALL_FLAGS,
+
+ .clk_div = 4,
+ .fw_name = "iqs620a.bin",
+ .event_regs = &iqs620a_event_regs[IQS62X_UI_PROX],
+ },
+ {
+ .dev_name = "iqs620a",
+ .sub_devs = iqs620a_sub_devs,
+ .num_sub_devs = ARRAY_SIZE(iqs620a_sub_devs),
+
+ .prod_num = IQS620_PROD_NUM,
+ .sw_num = 0x08,
+
+ .prox_mask = BIT(0),
+ .sar_mask = BIT(1) | BIT(7),
+ .hall_mask = BIT(2),
+ .hyst_mask = BIT(3),
+ .temp_mask = BIT(4),
+
+ .prox_settings = IQS620_PROX_SETTINGS_4,
+ .hall_flags = IQS620_HALL_FLAGS,
+
+ .clk_div = 4,
+ .fw_name = "iqs620a.bin",
+ .event_regs = &iqs620a_event_regs[IQS62X_UI_PROX],
+ },
+ {
+ .dev_name = "iqs621",
+ .sub_devs = iqs621_sub_devs,
+ .num_sub_devs = ARRAY_SIZE(iqs621_sub_devs),
+
+ .prod_num = IQS621_PROD_NUM,
+ .sw_num = 0x09,
+ .cal_regs = iqs621_cal_regs,
+ .num_cal_regs = ARRAY_SIZE(iqs621_cal_regs),
+
+ .prox_mask = BIT(0),
+ .hall_mask = BIT(1),
+ .als_mask = BIT(2),
+ .hyst_mask = BIT(3),
+ .temp_mask = BIT(4),
+
+ .als_flags = IQS621_ALS_FLAGS,
+ .hall_flags = IQS621_HALL_FLAGS,
+ .hyst_shift = 5,
+
+ .clk_div = 2,
+ .fw_name = "iqs621.bin",
+ .event_regs = &iqs621_event_regs[IQS62X_UI_PROX],
+ },
+ {
+ .dev_name = "iqs622",
+ .sub_devs = iqs622_sub_devs,
+ .num_sub_devs = ARRAY_SIZE(iqs622_sub_devs),
+
+ .prod_num = IQS622_PROD_NUM,
+ .sw_num = 0x06,
+
+ .prox_mask = BIT(0),
+ .sar_mask = BIT(1),
+ .hall_mask = BIT(2),
+ .als_mask = BIT(3),
+ .ir_mask = BIT(4),
+
+ .prox_settings = IQS622_PROX_SETTINGS_4,
+ .als_flags = IQS622_ALS_FLAGS,
+ .hall_flags = IQS622_HALL_FLAGS,
+
+ .clk_div = 2,
+ .fw_name = "iqs622.bin",
+ .event_regs = &iqs622_event_regs[IQS62X_UI_PROX],
+ },
+ {
+ .dev_name = "iqs624",
+ .sub_devs = iqs624_sub_devs,
+ .num_sub_devs = ARRAY_SIZE(iqs624_sub_devs),
+
+ .prod_num = IQS624_PROD_NUM,
+ .sw_num = 0x0B,
+
+ .interval = IQS624_INTERVAL_NUM,
+ .interval_div = 3,
+
+ .clk_div = 2,
+ .fw_name = "iqs624.bin",
+ .event_regs = &iqs624_event_regs[IQS62X_UI_PROX],
+ },
+ {
+ .dev_name = "iqs625",
+ .sub_devs = iqs625_sub_devs,
+ .num_sub_devs = ARRAY_SIZE(iqs625_sub_devs),
+
+ .prod_num = IQS625_PROD_NUM,
+ .sw_num = 0x0B,
+
+ .interval = IQS625_INTERVAL_NUM,
+ .interval_div = 10,
+
+ .clk_div = 2,
+ .fw_name = "iqs625.bin",
+ .event_regs = &iqs625_event_regs[IQS62X_UI_PROX],
+ },
+};
+
+static const struct regmap_config iqs62x_map_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = IQS62X_MAX_REG,
+};
+
+static int iqs62x_probe(struct i2c_client *client)
+{
+ struct iqs62x_core *iqs62x;
+ struct iqs62x_info info;
+ unsigned int val;
+ int ret, i, j;
+ u8 sw_num = 0;
+ const char *fw_name = NULL;
+
+ iqs62x = devm_kzalloc(&client->dev, sizeof(*iqs62x), GFP_KERNEL);
+ if (!iqs62x)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, iqs62x);
+ iqs62x->client = client;
+
+ BLOCKING_INIT_NOTIFIER_HEAD(&iqs62x->nh);
+ INIT_LIST_HEAD(&iqs62x->fw_blk_head);
+ init_completion(&iqs62x->fw_done);
+
+ iqs62x->regmap = devm_regmap_init_i2c(client, &iqs62x_map_config);
+ if (IS_ERR(iqs62x->regmap)) {
+ ret = PTR_ERR(iqs62x->regmap);
+ dev_err(&client->dev, "Failed to initialize register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = regmap_raw_read(iqs62x->regmap, IQS62X_PROD_NUM, &info,
+ sizeof(info));
+ if (ret)
+ return ret;
+
+ /*
+ * The following sequence validates the device's product and software
+ * numbers. It then determines if the device is factory-calibrated by
+ * checking for nonzero values in the device's designated calibration
+ * registers (if applicable). Depending on the device, the absence of
+ * calibration data indicates a reduced feature set or invalid device.
+ *
+ * For devices given in both calibrated and uncalibrated versions, the
+ * calibrated version (e.g. IQS620AT) appears first in the iqs62x_devs
+ * array. The uncalibrated version (e.g. IQS620A) appears next and has
+ * the same product and software numbers, but no calibration registers
+ * are specified.
+ */
+ for (i = 0; i < ARRAY_SIZE(iqs62x_devs); i++) {
+ if (info.prod_num != iqs62x_devs[i].prod_num)
+ continue;
+
+ iqs62x->dev_desc = &iqs62x_devs[i];
+
+ if (info.sw_num < iqs62x->dev_desc->sw_num)
+ continue;
+
+ sw_num = info.sw_num;
+
+ /*
+ * Read each of the device's designated calibration registers,
+ * if any, and exit from the inner loop early if any are equal
+ * to zero (indicating the device is uncalibrated). This could
+ * be acceptable depending on the device (e.g. IQS620A instead
+ * of IQS620AT).
+ */
+ for (j = 0; j < iqs62x->dev_desc->num_cal_regs; j++) {
+ ret = regmap_read(iqs62x->regmap,
+ iqs62x->dev_desc->cal_regs[j], &val);
+ if (ret)
+ return ret;
+
+ if (!val)
+ break;
+ }
+
+ /*
+ * If the number of nonzero values read from the device equals
+ * the number of designated calibration registers (which could
+ * be zero), exit from the outer loop early to signal that the
+ * device's product and software numbers match a known device,
+ * and the device is calibrated (if applicable).
+ */
+ if (j == iqs62x->dev_desc->num_cal_regs)
+ break;
+ }
+
+ if (!iqs62x->dev_desc) {
+ dev_err(&client->dev, "Unrecognized product number: 0x%02X\n",
+ info.prod_num);
+ return -EINVAL;
+ }
+
+ if (!sw_num) {
+ dev_err(&client->dev, "Unrecognized software number: 0x%02X\n",
+ info.sw_num);
+ return -EINVAL;
+ }
+
+ if (i == ARRAY_SIZE(iqs62x_devs)) {
+ dev_err(&client->dev, "Uncalibrated device\n");
+ return -ENODATA;
+ }
+
+ device_property_read_string(&client->dev, "firmware-name", &fw_name);
+
+ ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
+ fw_name ? : iqs62x->dev_desc->fw_name,
+ &client->dev, GFP_KERNEL, iqs62x,
+ iqs62x_firmware_load);
+ if (ret)
+ dev_err(&client->dev, "Failed to request firmware: %d\n", ret);
+
+ return ret;
+}
+
+static int iqs62x_remove(struct i2c_client *client)
+{
+ struct iqs62x_core *iqs62x = i2c_get_clientdata(client);
+
+ wait_for_completion(&iqs62x->fw_done);
+
+ return 0;
+}
+
+static int __maybe_unused iqs62x_suspend(struct device *dev)
+{
+ struct iqs62x_core *iqs62x = dev_get_drvdata(dev);
+ int ret;
+
+ wait_for_completion(&iqs62x->fw_done);
+
+ /*
+ * As per the datasheet, automatic mode switching must be disabled
+ * before the device is placed in or taken out of halt mode.
+ */
+ ret = regmap_update_bits(iqs62x->regmap, IQS62X_PWR_SETTINGS,
+ IQS62X_PWR_SETTINGS_DIS_AUTO, 0xFF);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(iqs62x->regmap, IQS62X_PWR_SETTINGS,
+ IQS62X_PWR_SETTINGS_PWR_MODE_MASK,
+ IQS62X_PWR_SETTINGS_PWR_MODE_HALT);
+}
+
+static int __maybe_unused iqs62x_resume(struct device *dev)
+{
+ struct iqs62x_core *iqs62x = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regmap_update_bits(iqs62x->regmap, IQS62X_PWR_SETTINGS,
+ IQS62X_PWR_SETTINGS_PWR_MODE_MASK,
+ IQS62X_PWR_SETTINGS_PWR_MODE_NORM);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(iqs62x->regmap, IQS62X_PWR_SETTINGS,
+ IQS62X_PWR_SETTINGS_DIS_AUTO, 0);
+}
+
+static SIMPLE_DEV_PM_OPS(iqs62x_pm, iqs62x_suspend, iqs62x_resume);
+
+static const struct of_device_id iqs62x_of_match[] = {
+ { .compatible = "azoteq,iqs620a" },
+ { .compatible = "azoteq,iqs621" },
+ { .compatible = "azoteq,iqs622" },
+ { .compatible = "azoteq,iqs624" },
+ { .compatible = "azoteq,iqs625" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, iqs62x_of_match);
+
+static struct i2c_driver iqs62x_i2c_driver = {
+ .driver = {
+ .name = "iqs62x",
+ .of_match_table = iqs62x_of_match,
+ .pm = &iqs62x_pm,
+ },
+ .probe_new = iqs62x_probe,
+ .remove = iqs62x_remove,
+};
+module_i2c_driver(iqs62x_i2c_driver);
+
+MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
+MODULE_DESCRIPTION("Azoteq IQS620A/621/622/624/625 Multi-Function Sensors");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,139 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Azoteq IQS620A/621/622/624/625 Multi-Function Sensors
+ *
+ * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
+ */
+
+#ifndef __LINUX_MFD_IQS62X_H
+#define __LINUX_MFD_IQS62X_H
+
+#define IQS620_PROD_NUM 0x41
+#define IQS621_PROD_NUM 0x46
+#define IQS622_PROD_NUM 0x42
+#define IQS624_PROD_NUM 0x43
+#define IQS625_PROD_NUM 0x4E
+
+#define IQS621_ALS_FLAGS 0x16
+#define IQS622_ALS_FLAGS 0x14
+
+#define IQS624_HALL_UI 0x70
+#define IQS624_HALL_UI_WHL_EVENT BIT(4)
+#define IQS624_HALL_UI_INT_EVENT BIT(3)
+#define IQS624_HALL_UI_AUTO_CAL BIT(2)
+
+#define IQS624_INTERVAL_DIV 0x7D
+
+#define IQS620_GLBL_EVENT_MASK 0xD7
+#define IQS620_GLBL_EVENT_MASK_PMU BIT(6)
+
+#define IQS62X_NUM_KEYS 16
+#define IQS62X_NUM_EVENTS (IQS62X_NUM_KEYS + 5)
+
+#define IQS62X_EVENT_SIZE 10
+
+enum iqs62x_ui_sel {
+ IQS62X_UI_PROX,
+ IQS62X_UI_SAR1,
+};
+
+enum iqs62x_event_reg {
+ IQS62X_EVENT_NONE,
+ IQS62X_EVENT_SYS,
+ IQS62X_EVENT_PROX,
+ IQS62X_EVENT_HYST,
+ IQS62X_EVENT_HALL,
+ IQS62X_EVENT_ALS,
+ IQS62X_EVENT_IR,
+ IQS62X_EVENT_WHEEL,
+ IQS62X_EVENT_INTER,
+ IQS62X_EVENT_UI_LO,
+ IQS62X_EVENT_UI_HI,
+};
+
+enum iqs62x_event_flag {
+ /* keys */
+ IQS62X_EVENT_PROX_CH0_T,
+ IQS62X_EVENT_PROX_CH0_P,
+ IQS62X_EVENT_PROX_CH1_T,
+ IQS62X_EVENT_PROX_CH1_P,
+ IQS62X_EVENT_PROX_CH2_T,
+ IQS62X_EVENT_PROX_CH2_P,
+ IQS62X_EVENT_HYST_POS_T,
+ IQS62X_EVENT_HYST_POS_P,
+ IQS62X_EVENT_HYST_NEG_T,
+ IQS62X_EVENT_HYST_NEG_P,
+ IQS62X_EVENT_SAR1_ACT,
+ IQS62X_EVENT_SAR1_QRD,
+ IQS62X_EVENT_SAR1_MOVE,
+ IQS62X_EVENT_SAR1_HALT,
+ IQS62X_EVENT_WHEEL_UP,
+ IQS62X_EVENT_WHEEL_DN,
+
+ /* switches */
+ IQS62X_EVENT_HALL_N_T,
+ IQS62X_EVENT_HALL_N_P,
+ IQS62X_EVENT_HALL_S_T,
+ IQS62X_EVENT_HALL_S_P,
+
+ /* everything else */
+ IQS62X_EVENT_SYS_RESET,
+};
+
+struct iqs62x_event_data {
+ u16 ui_data;
+ u8 als_flags;
+ u8 ir_flags;
+ u8 interval;
+};
+
+struct iqs62x_event_desc {
+ enum iqs62x_event_reg reg;
+ u8 mask;
+ u8 val;
+};
+
+struct iqs62x_dev_desc {
+ const char *dev_name;
+ const struct mfd_cell *sub_devs;
+ int num_sub_devs;
+
+ u8 prod_num;
+ u8 sw_num;
+ const u8 *cal_regs;
+ int num_cal_regs;
+
+ u8 prox_mask;
+ u8 sar_mask;
+ u8 hall_mask;
+ u8 hyst_mask;
+ u8 temp_mask;
+ u8 als_mask;
+ u8 ir_mask;
+
+ u8 prox_settings;
+ u8 als_flags;
+ u8 hall_flags;
+ u8 hyst_shift;
+
+ u8 interval;
+ u8 interval_div;
+
+ u8 clk_div;
+ const char *fw_name;
+ const enum iqs62x_event_reg (*event_regs)[IQS62X_EVENT_SIZE];
+};
+
+struct iqs62x_core {
+ const struct iqs62x_dev_desc *dev_desc;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct blocking_notifier_head nh;
+ struct list_head fw_blk_head;
+ struct completion fw_done;
+ enum iqs62x_ui_sel ui_sel;
+};
+
+extern const struct iqs62x_event_desc iqs62x_events[IQS62X_NUM_EVENTS];
+
+#endif /* __LINUX_MFD_IQS62X_H */
This patch adds core support for the Azoteq IQS620A, IQS621, IQS622, IQS624 and IQS625 multi-function sensors. Signed-off-by: Jeff LaBundy <jeff@labundy.com> --- Changes in v5: - Merged iqs62x-core.c and iqs62x-tables.c into a single iqs62x.c - Corrected spelling of "data sheet" to "datasheet" - Added one line of whitespace in various places to improve readability - Replaced iqs62x->map with iqs62x->regmap throughout - Added the prox_settings member to the iqs62x_dev_desc struct and eliminated the ternary operator in iqs62x_dev_init to determine SAR UI enable register address - Added a comment in iqs62x_dev_init to explain the background for the bounds checking done on the IQS624/625 interval divider - Added #defines for the delays used within iqs62x_dev_init - Renamed iqs62x_fw_prs and iqs62x_fw_cb to iqs62x_firmware_parse and iqs62x_firmware_load, respectively - Updated the call to devm_mfd_add_devices to use PLATFORM_DEVID_NONE instead of -1 and printed "sub-devices" instead of "devices" in the error message - Dropped #defines for mfd_cell names in favor of the actual string names and collapsed mfd_cells with no other members into one line - Demoted iqs62x_devs to a static array as it is not used by any sub-devices - Removed unnecessary { IQS620A_DEV, ... } enum and IQS62X_NUM_DEV #define - Removed the soft reset and associated delay in iqs62x_probe to preserve any PWM-related changes made by a bootloader - Updated the comments in iqs62x_probe to highlight the significance of blank calibration registers and why the outer loop may be exited early - Made the first call to regmap_update_bits in iqs62x_suspend consistent with other instances in the series that set a single bit by passing all ones for the value instead of the mask Changes in v4: - None Changes in v3: - None Changes in v2: - Merged 'Copyright' and 'Author' lines into one in introductory comments - Replaced 'error' with 'ret' throughout - Updated iqs62x_dev_init to account for 4/8/16-MHz clock divider in start-up delays and replaced ATI timeout routine with regmap_read_poll_timeout - Added an error message to iqs62x_irq in case device status fails to be read - Replaced sw_num member of iqs62x_core with a local variable in iqs62x_probe as the former was unused anywhere else - Added comments throughout iqs62x_probe to clarify how devices are matched based on the presence of calibration data - Inverted the product and software number comparison logic in iqs62x_probe to avoid an else...continue branch - Changed iqs62x_probe from .probe callback to .probe_new callback, thereby eliminating the otherwise unused iqs62x_id array - Moved iqs62x_suspend and iqs62x_resume below iqs62x_remove - Eliminated tabbed alignment of regmap_config and i2c_driver struct members - Added register definitions for register addresses used in iqs621_cal_regs, iqs620at_cal_regs and iqs62x_devs arrays - Removed of_compatible string from IQS622 mfd_cell struct as its proximity (now ambient light) sensing functionality need not be represented using a child node - Dissolved union in iqs62x_event_data to allow simultaneous use of ir_flags and als_flags - Removed temp_flags member of iqs62x_event_data, IQS62X_EVENT_TEMP register enumeration and IQS62X_EVENT_UI_HI/LO from iqs620a_event_regs (thereby re- ducing IQS62X_EVENT_SIZE to 10) as they were unused drivers/mfd/Kconfig | 13 + drivers/mfd/Makefile | 1 + drivers/mfd/iqs62x.c | 1063 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/iqs62x.h | 139 ++++++ 4 files changed, 1216 insertions(+) create mode 100644 drivers/mfd/iqs62x.c create mode 100644 include/linux/mfd/iqs62x.h -- 2.7.4