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9b40b030c4
Add MFD core driver support for DA9062 Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
513 lines
13 KiB
C
513 lines
13 KiB
C
/*
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* Core, IRQ and I2C device driver for DA9062 PMIC
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* Copyright (C) 2015 Dialog Semiconductor Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/regmap.h>
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#include <linux/irq.h>
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#include <linux/mfd/core.h>
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#include <linux/i2c.h>
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#include <linux/mfd/da9062/core.h>
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#include <linux/mfd/da9062/registers.h>
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#include <linux/regulator/of_regulator.h>
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#define DA9062_REG_EVENT_A_OFFSET 0
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#define DA9062_REG_EVENT_B_OFFSET 1
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#define DA9062_REG_EVENT_C_OFFSET 2
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static struct regmap_irq da9062_irqs[] = {
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/* EVENT A */
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[DA9062_IRQ_ONKEY] = {
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.reg_offset = DA9062_REG_EVENT_A_OFFSET,
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.mask = DA9062AA_M_NONKEY_MASK,
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},
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[DA9062_IRQ_ALARM] = {
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.reg_offset = DA9062_REG_EVENT_A_OFFSET,
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.mask = DA9062AA_M_ALARM_MASK,
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},
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[DA9062_IRQ_TICK] = {
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.reg_offset = DA9062_REG_EVENT_A_OFFSET,
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.mask = DA9062AA_M_TICK_MASK,
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},
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[DA9062_IRQ_WDG_WARN] = {
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.reg_offset = DA9062_REG_EVENT_A_OFFSET,
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.mask = DA9062AA_M_WDG_WARN_MASK,
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},
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[DA9062_IRQ_SEQ_RDY] = {
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.reg_offset = DA9062_REG_EVENT_A_OFFSET,
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.mask = DA9062AA_M_SEQ_RDY_MASK,
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},
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/* EVENT B */
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[DA9062_IRQ_TEMP] = {
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.reg_offset = DA9062_REG_EVENT_B_OFFSET,
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.mask = DA9062AA_M_TEMP_MASK,
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},
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[DA9062_IRQ_LDO_LIM] = {
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.reg_offset = DA9062_REG_EVENT_B_OFFSET,
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.mask = DA9062AA_M_LDO_LIM_MASK,
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},
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[DA9062_IRQ_DVC_RDY] = {
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.reg_offset = DA9062_REG_EVENT_B_OFFSET,
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.mask = DA9062AA_M_DVC_RDY_MASK,
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},
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[DA9062_IRQ_VDD_WARN] = {
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.reg_offset = DA9062_REG_EVENT_B_OFFSET,
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.mask = DA9062AA_M_VDD_WARN_MASK,
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},
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/* EVENT C */
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[DA9062_IRQ_GPI0] = {
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.reg_offset = DA9062_REG_EVENT_C_OFFSET,
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.mask = DA9062AA_M_GPI0_MASK,
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},
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[DA9062_IRQ_GPI1] = {
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.reg_offset = DA9062_REG_EVENT_C_OFFSET,
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.mask = DA9062AA_M_GPI1_MASK,
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},
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[DA9062_IRQ_GPI2] = {
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.reg_offset = DA9062_REG_EVENT_C_OFFSET,
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.mask = DA9062AA_M_GPI2_MASK,
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},
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[DA9062_IRQ_GPI3] = {
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.reg_offset = DA9062_REG_EVENT_C_OFFSET,
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.mask = DA9062AA_M_GPI3_MASK,
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},
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[DA9062_IRQ_GPI4] = {
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.reg_offset = DA9062_REG_EVENT_C_OFFSET,
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.mask = DA9062AA_M_GPI4_MASK,
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},
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};
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static struct regmap_irq_chip da9062_irq_chip = {
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.name = "da9062-irq",
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.irqs = da9062_irqs,
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.num_irqs = DA9062_NUM_IRQ,
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.num_regs = 3,
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.status_base = DA9062AA_EVENT_A,
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.mask_base = DA9062AA_IRQ_MASK_A,
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.ack_base = DA9062AA_EVENT_A,
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};
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static struct resource da9062_core_resources[] = {
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DEFINE_RES_NAMED(DA9062_IRQ_VDD_WARN, 1, "VDD_WARN", IORESOURCE_IRQ),
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};
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static struct resource da9062_regulators_resources[] = {
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DEFINE_RES_NAMED(DA9062_IRQ_LDO_LIM, 1, "LDO_LIM", IORESOURCE_IRQ),
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};
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static struct resource da9062_thermal_resources[] = {
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DEFINE_RES_NAMED(DA9062_IRQ_TEMP, 1, "THERMAL", IORESOURCE_IRQ),
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};
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static struct resource da9062_wdt_resources[] = {
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DEFINE_RES_NAMED(DA9062_IRQ_WDG_WARN, 1, "WD_WARN", IORESOURCE_IRQ),
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};
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static const struct mfd_cell da9062_devs[] = {
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{
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.name = "da9062-core",
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.num_resources = ARRAY_SIZE(da9062_core_resources),
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.resources = da9062_core_resources,
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},
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{
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.name = "da9062-regulators",
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.num_resources = ARRAY_SIZE(da9062_regulators_resources),
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.resources = da9062_regulators_resources,
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},
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{
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.name = "da9062-watchdog",
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.num_resources = ARRAY_SIZE(da9062_wdt_resources),
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.resources = da9062_wdt_resources,
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.of_compatible = "dlg,da9062-wdt",
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},
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{
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.name = "da9062-thermal",
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.num_resources = ARRAY_SIZE(da9062_thermal_resources),
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.resources = da9062_thermal_resources,
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.of_compatible = "dlg,da9062-thermal",
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},
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};
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static int da9062_clear_fault_log(struct da9062 *chip)
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{
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int ret;
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int fault_log;
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ret = regmap_read(chip->regmap, DA9062AA_FAULT_LOG, &fault_log);
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if (ret < 0)
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return ret;
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if (fault_log) {
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if (fault_log & DA9062AA_TWD_ERROR_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: TWD_ERROR\n");
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if (fault_log & DA9062AA_POR_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: POR\n");
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if (fault_log & DA9062AA_VDD_FAULT_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: VDD_FAULT\n");
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if (fault_log & DA9062AA_VDD_START_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: VDD_START\n");
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if (fault_log & DA9062AA_TEMP_CRIT_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: TEMP_CRIT\n");
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if (fault_log & DA9062AA_KEY_RESET_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: KEY_RESET\n");
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if (fault_log & DA9062AA_NSHUTDOWN_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: NSHUTDOWN\n");
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if (fault_log & DA9062AA_WAIT_SHUT_MASK)
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dev_dbg(chip->dev, "Fault log entry detected: WAIT_SHUT\n");
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ret = regmap_write(chip->regmap, DA9062AA_FAULT_LOG,
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fault_log);
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}
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return ret;
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}
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int get_device_type(struct da9062 *chip)
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{
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int device_id, variant_id, variant_mrc;
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int ret;
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ret = regmap_read(chip->regmap, DA9062AA_DEVICE_ID, &device_id);
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if (ret < 0) {
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dev_err(chip->dev, "Cannot read chip ID.\n");
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return -EIO;
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}
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if (device_id != DA9062_PMIC_DEVICE_ID) {
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dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
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return -ENODEV;
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}
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ret = regmap_read(chip->regmap, DA9062AA_VARIANT_ID, &variant_id);
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if (ret < 0) {
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dev_err(chip->dev, "Cannot read chip variant id.\n");
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return -EIO;
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}
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dev_info(chip->dev,
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"Device detected (device-ID: 0x%02X, var-ID: 0x%02X)\n",
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device_id, variant_id);
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variant_mrc = (variant_id & DA9062AA_MRC_MASK) >> DA9062AA_MRC_SHIFT;
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if (variant_mrc < DA9062_PMIC_VARIANT_MRC_AA) {
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dev_err(chip->dev,
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"Cannot support variant MRC: 0x%02X\n", variant_mrc);
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return -ENODEV;
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}
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return ret;
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}
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static const struct regmap_range da9062_aa_readable_ranges[] = {
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{
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.range_min = DA9062AA_PAGE_CON,
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.range_max = DA9062AA_STATUS_B,
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}, {
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.range_min = DA9062AA_STATUS_D,
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.range_max = DA9062AA_EVENT_C,
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}, {
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.range_min = DA9062AA_IRQ_MASK_A,
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.range_max = DA9062AA_IRQ_MASK_C,
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}, {
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.range_min = DA9062AA_CONTROL_A,
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.range_max = DA9062AA_GPIO_4,
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}, {
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.range_min = DA9062AA_GPIO_WKUP_MODE,
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.range_max = DA9062AA_BUCK4_CONT,
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}, {
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.range_min = DA9062AA_BUCK3_CONT,
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.range_max = DA9062AA_BUCK3_CONT,
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}, {
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.range_min = DA9062AA_LDO1_CONT,
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.range_max = DA9062AA_LDO4_CONT,
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}, {
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.range_min = DA9062AA_DVC_1,
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.range_max = DA9062AA_DVC_1,
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}, {
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.range_min = DA9062AA_COUNT_S,
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.range_max = DA9062AA_SECOND_D,
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}, {
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.range_min = DA9062AA_SEQ,
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.range_max = DA9062AA_ID_4_3,
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}, {
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.range_min = DA9062AA_ID_12_11,
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.range_max = DA9062AA_ID_16_15,
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}, {
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.range_min = DA9062AA_ID_22_21,
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.range_max = DA9062AA_ID_32_31,
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}, {
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.range_min = DA9062AA_SEQ_A,
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.range_max = DA9062AA_BUCK3_CFG,
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}, {
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.range_min = DA9062AA_VBUCK2_A,
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.range_max = DA9062AA_VBUCK4_A,
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}, {
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.range_min = DA9062AA_VBUCK3_A,
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.range_max = DA9062AA_VBUCK3_A,
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}, {
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.range_min = DA9062AA_VLDO1_A,
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.range_max = DA9062AA_VLDO4_A,
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}, {
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.range_min = DA9062AA_VBUCK2_B,
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.range_max = DA9062AA_VBUCK4_B,
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}, {
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.range_min = DA9062AA_VBUCK3_B,
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.range_max = DA9062AA_VBUCK3_B,
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}, {
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.range_min = DA9062AA_VLDO1_B,
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.range_max = DA9062AA_VLDO4_B,
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}, {
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.range_min = DA9062AA_BBAT_CONT,
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.range_max = DA9062AA_BBAT_CONT,
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}, {
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.range_min = DA9062AA_INTERFACE,
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.range_max = DA9062AA_CONFIG_E,
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}, {
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.range_min = DA9062AA_CONFIG_G,
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.range_max = DA9062AA_CONFIG_K,
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}, {
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.range_min = DA9062AA_CONFIG_M,
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.range_max = DA9062AA_CONFIG_M,
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}, {
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.range_min = DA9062AA_TRIM_CLDR,
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.range_max = DA9062AA_GP_ID_19,
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}, {
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.range_min = DA9062AA_DEVICE_ID,
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.range_max = DA9062AA_CONFIG_ID,
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},
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};
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static const struct regmap_range da9062_aa_writeable_ranges[] = {
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{
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.range_min = DA9062AA_PAGE_CON,
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.range_max = DA9062AA_PAGE_CON,
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}, {
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.range_min = DA9062AA_FAULT_LOG,
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.range_max = DA9062AA_EVENT_C,
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}, {
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.range_min = DA9062AA_IRQ_MASK_A,
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.range_max = DA9062AA_IRQ_MASK_C,
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}, {
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.range_min = DA9062AA_CONTROL_A,
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.range_max = DA9062AA_GPIO_4,
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}, {
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.range_min = DA9062AA_GPIO_WKUP_MODE,
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.range_max = DA9062AA_BUCK4_CONT,
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}, {
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.range_min = DA9062AA_BUCK3_CONT,
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.range_max = DA9062AA_BUCK3_CONT,
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}, {
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.range_min = DA9062AA_LDO1_CONT,
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.range_max = DA9062AA_LDO4_CONT,
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}, {
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.range_min = DA9062AA_DVC_1,
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.range_max = DA9062AA_DVC_1,
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}, {
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.range_min = DA9062AA_COUNT_S,
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.range_max = DA9062AA_ALARM_Y,
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}, {
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.range_min = DA9062AA_SEQ,
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.range_max = DA9062AA_ID_4_3,
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}, {
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.range_min = DA9062AA_ID_12_11,
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.range_max = DA9062AA_ID_16_15,
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}, {
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.range_min = DA9062AA_ID_22_21,
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.range_max = DA9062AA_ID_32_31,
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}, {
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.range_min = DA9062AA_SEQ_A,
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.range_max = DA9062AA_BUCK3_CFG,
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}, {
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.range_min = DA9062AA_VBUCK2_A,
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.range_max = DA9062AA_VBUCK4_A,
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}, {
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.range_min = DA9062AA_VBUCK3_A,
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.range_max = DA9062AA_VBUCK3_A,
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}, {
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.range_min = DA9062AA_VLDO1_A,
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.range_max = DA9062AA_VLDO4_A,
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}, {
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.range_min = DA9062AA_VBUCK2_B,
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.range_max = DA9062AA_VBUCK4_B,
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}, {
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.range_min = DA9062AA_VBUCK3_B,
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.range_max = DA9062AA_VBUCK3_B,
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}, {
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.range_min = DA9062AA_VLDO1_B,
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.range_max = DA9062AA_VLDO4_B,
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}, {
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.range_min = DA9062AA_BBAT_CONT,
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.range_max = DA9062AA_BBAT_CONT,
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}, {
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.range_min = DA9062AA_GP_ID_0,
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.range_max = DA9062AA_GP_ID_19,
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},
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};
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static const struct regmap_range da9062_aa_volatile_ranges[] = {
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{
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.range_min = DA9062AA_PAGE_CON,
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.range_max = DA9062AA_STATUS_B,
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}, {
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.range_min = DA9062AA_STATUS_D,
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.range_max = DA9062AA_EVENT_C,
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}, {
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.range_min = DA9062AA_CONTROL_F,
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.range_max = DA9062AA_CONTROL_F,
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}, {
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.range_min = DA9062AA_COUNT_S,
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.range_max = DA9062AA_SECOND_D,
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},
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};
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static const struct regmap_access_table da9062_aa_readable_table = {
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.yes_ranges = da9062_aa_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9062_aa_readable_ranges),
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};
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static const struct regmap_access_table da9062_aa_writeable_table = {
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.yes_ranges = da9062_aa_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9062_aa_writeable_ranges),
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};
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static const struct regmap_access_table da9062_aa_volatile_table = {
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.yes_ranges = da9062_aa_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9062_aa_volatile_ranges),
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};
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static const struct regmap_range_cfg da9062_range_cfg[] = {
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{
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.range_min = DA9062AA_PAGE_CON,
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.range_max = DA9062AA_CONFIG_ID,
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.selector_reg = DA9062AA_PAGE_CON,
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.selector_mask = 1 << DA9062_I2C_PAGE_SEL_SHIFT,
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.selector_shift = DA9062_I2C_PAGE_SEL_SHIFT,
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.window_start = 0,
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.window_len = 256,
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}
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};
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static struct regmap_config da9062_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.ranges = da9062_range_cfg,
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.num_ranges = ARRAY_SIZE(da9062_range_cfg),
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.max_register = DA9062AA_CONFIG_ID,
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.cache_type = REGCACHE_RBTREE,
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.rd_table = &da9062_aa_readable_table,
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.wr_table = &da9062_aa_writeable_table,
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.volatile_table = &da9062_aa_volatile_table,
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};
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static int da9062_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct da9062 *chip;
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unsigned int irq_base;
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int ret;
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chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
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if (!chip)
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return -ENOMEM;
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i2c_set_clientdata(i2c, chip);
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chip->dev = &i2c->dev;
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if (!i2c->irq) {
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dev_err(chip->dev, "No IRQ configured\n");
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return -EINVAL;
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}
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chip->regmap = devm_regmap_init_i2c(i2c, &da9062_regmap_config);
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if (IS_ERR(chip->regmap)) {
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ret = PTR_ERR(chip->regmap);
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dev_err(chip->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = da9062_clear_fault_log(chip);
|
|
if (ret < 0)
|
|
dev_warn(chip->dev, "Cannot clear fault log\n");
|
|
|
|
ret = get_device_type(chip);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
|
|
-1, &da9062_irq_chip,
|
|
&chip->regmap_irq);
|
|
if (ret) {
|
|
dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
|
|
i2c->irq, ret);
|
|
return ret;
|
|
}
|
|
|
|
irq_base = regmap_irq_chip_get_base(chip->regmap_irq);
|
|
|
|
ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, da9062_devs,
|
|
ARRAY_SIZE(da9062_devs), NULL, irq_base,
|
|
NULL);
|
|
if (ret) {
|
|
dev_err(chip->dev, "Cannot register child devices\n");
|
|
regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int da9062_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct da9062 *chip = i2c_get_clientdata(i2c);
|
|
|
|
mfd_remove_devices(chip->dev);
|
|
regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id da9062_i2c_id[] = {
|
|
{ "da9062", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, da9062_i2c_id);
|
|
|
|
static const struct of_device_id da9062_dt_ids[] = {
|
|
{ .compatible = "dlg,da9062", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, da9062_dt_ids);
|
|
|
|
static struct i2c_driver da9062_i2c_driver = {
|
|
.driver = {
|
|
.name = "da9062",
|
|
.of_match_table = of_match_ptr(da9062_dt_ids),
|
|
},
|
|
.probe = da9062_i2c_probe,
|
|
.remove = da9062_i2c_remove,
|
|
.id_table = da9062_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(da9062_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("Core device driver for Dialog DA9062");
|
|
MODULE_AUTHOR("Steve Twiss <stwiss.opensource@diasemi.com>");
|
|
MODULE_LICENSE("GPL");
|