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247 lines
6.6 KiB
247 lines
6.6 KiB
/* |
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* axp20x.c - MFD core driver for the X-Powers AXP202 and AXP209 |
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* |
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* AXP20x comprises an adaptive USB-Compatible PWM charger, 2 BUCK DC-DC |
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* converters, 5 LDOs, multiple 12-bit ADCs of voltage, current and temperature |
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* as well as 4 configurable GPIOs. |
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* |
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* Author: Carlo Caione <carlo@caione.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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*/ |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/mfd/axp20x.h> |
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#include <linux/mfd/core.h> |
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#include <linux/of_device.h> |
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#include <linux/of_irq.h> |
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#define AXP20X_OFF 0x80 |
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static const struct regmap_range axp20x_writeable_ranges[] = { |
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regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE), |
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regmap_reg_range(AXP20X_DCDC_MODE, AXP20X_FG_RES), |
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}; |
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static const struct regmap_range axp20x_volatile_ranges[] = { |
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regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE), |
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}; |
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static const struct regmap_access_table axp20x_writeable_table = { |
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.yes_ranges = axp20x_writeable_ranges, |
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.n_yes_ranges = ARRAY_SIZE(axp20x_writeable_ranges), |
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}; |
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static const struct regmap_access_table axp20x_volatile_table = { |
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.yes_ranges = axp20x_volatile_ranges, |
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.n_yes_ranges = ARRAY_SIZE(axp20x_volatile_ranges), |
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}; |
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static struct resource axp20x_pek_resources[] = { |
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{ |
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.name = "PEK_DBR", |
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.start = AXP20X_IRQ_PEK_RIS_EDGE, |
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.end = AXP20X_IRQ_PEK_RIS_EDGE, |
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.flags = IORESOURCE_IRQ, |
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}, { |
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.name = "PEK_DBF", |
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.start = AXP20X_IRQ_PEK_FAL_EDGE, |
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.end = AXP20X_IRQ_PEK_FAL_EDGE, |
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.flags = IORESOURCE_IRQ, |
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}, |
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}; |
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static const struct regmap_config axp20x_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.wr_table = &axp20x_writeable_table, |
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.volatile_table = &axp20x_volatile_table, |
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.max_register = AXP20X_FG_RES, |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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#define AXP20X_IRQ(_irq, _off, _mask) \ |
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[AXP20X_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) } |
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static const struct regmap_irq axp20x_regmap_irqs[] = { |
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AXP20X_IRQ(ACIN_OVER_V, 0, 7), |
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AXP20X_IRQ(ACIN_PLUGIN, 0, 6), |
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AXP20X_IRQ(ACIN_REMOVAL, 0, 5), |
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AXP20X_IRQ(VBUS_OVER_V, 0, 4), |
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AXP20X_IRQ(VBUS_PLUGIN, 0, 3), |
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AXP20X_IRQ(VBUS_REMOVAL, 0, 2), |
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AXP20X_IRQ(VBUS_V_LOW, 0, 1), |
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AXP20X_IRQ(BATT_PLUGIN, 1, 7), |
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AXP20X_IRQ(BATT_REMOVAL, 1, 6), |
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AXP20X_IRQ(BATT_ENT_ACT_MODE, 1, 5), |
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AXP20X_IRQ(BATT_EXIT_ACT_MODE, 1, 4), |
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AXP20X_IRQ(CHARG, 1, 3), |
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AXP20X_IRQ(CHARG_DONE, 1, 2), |
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AXP20X_IRQ(BATT_TEMP_HIGH, 1, 1), |
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AXP20X_IRQ(BATT_TEMP_LOW, 1, 0), |
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AXP20X_IRQ(DIE_TEMP_HIGH, 2, 7), |
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AXP20X_IRQ(CHARG_I_LOW, 2, 6), |
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AXP20X_IRQ(DCDC1_V_LONG, 2, 5), |
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AXP20X_IRQ(DCDC2_V_LONG, 2, 4), |
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AXP20X_IRQ(DCDC3_V_LONG, 2, 3), |
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AXP20X_IRQ(PEK_SHORT, 2, 1), |
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AXP20X_IRQ(PEK_LONG, 2, 0), |
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AXP20X_IRQ(N_OE_PWR_ON, 3, 7), |
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AXP20X_IRQ(N_OE_PWR_OFF, 3, 6), |
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AXP20X_IRQ(VBUS_VALID, 3, 5), |
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AXP20X_IRQ(VBUS_NOT_VALID, 3, 4), |
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AXP20X_IRQ(VBUS_SESS_VALID, 3, 3), |
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AXP20X_IRQ(VBUS_SESS_END, 3, 2), |
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AXP20X_IRQ(LOW_PWR_LVL1, 3, 1), |
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AXP20X_IRQ(LOW_PWR_LVL2, 3, 0), |
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AXP20X_IRQ(TIMER, 4, 7), |
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AXP20X_IRQ(PEK_RIS_EDGE, 4, 6), |
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AXP20X_IRQ(PEK_FAL_EDGE, 4, 5), |
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AXP20X_IRQ(GPIO3_INPUT, 4, 3), |
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AXP20X_IRQ(GPIO2_INPUT, 4, 2), |
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AXP20X_IRQ(GPIO1_INPUT, 4, 1), |
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AXP20X_IRQ(GPIO0_INPUT, 4, 0), |
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}; |
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static const struct of_device_id axp20x_of_match[] = { |
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{ .compatible = "x-powers,axp202", .data = (void *) AXP202_ID }, |
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{ .compatible = "x-powers,axp209", .data = (void *) AXP209_ID }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, axp20x_of_match); |
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/* |
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* This is useless for OF-enabled devices, but it is needed by I2C subsystem |
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*/ |
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static const struct i2c_device_id axp20x_i2c_id[] = { |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); |
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static const struct regmap_irq_chip axp20x_regmap_irq_chip = { |
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.name = "axp20x_irq_chip", |
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.status_base = AXP20X_IRQ1_STATE, |
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.ack_base = AXP20X_IRQ1_STATE, |
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.mask_base = AXP20X_IRQ1_EN, |
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.num_regs = 5, |
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.irqs = axp20x_regmap_irqs, |
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.num_irqs = ARRAY_SIZE(axp20x_regmap_irqs), |
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.mask_invert = true, |
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.init_ack_masked = true, |
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}; |
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static struct mfd_cell axp20x_cells[] = { |
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{ |
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.name = "axp20x-pek", |
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.num_resources = ARRAY_SIZE(axp20x_pek_resources), |
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.resources = axp20x_pek_resources, |
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}, { |
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.name = "axp20x-regulator", |
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}, |
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}; |
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static struct axp20x_dev *axp20x_pm_power_off; |
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static void axp20x_power_off(void) |
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{ |
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regmap_write(axp20x_pm_power_off->regmap, AXP20X_OFF_CTRL, |
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AXP20X_OFF); |
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} |
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static int axp20x_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 axp20x_dev *axp20x; |
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const struct of_device_id *of_id; |
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int ret; |
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axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); |
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if (!axp20x) |
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return -ENOMEM; |
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of_id = of_match_device(axp20x_of_match, &i2c->dev); |
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if (!of_id) { |
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dev_err(&i2c->dev, "Unable to setup AXP20X data\n"); |
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return -ENODEV; |
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} |
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axp20x->variant = (long) of_id->data; |
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axp20x->i2c_client = i2c; |
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axp20x->dev = &i2c->dev; |
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dev_set_drvdata(axp20x->dev, axp20x); |
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axp20x->regmap = devm_regmap_init_i2c(i2c, &axp20x_regmap_config); |
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if (IS_ERR(axp20x->regmap)) { |
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ret = PTR_ERR(axp20x->regmap); |
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dev_err(&i2c->dev, "regmap init failed: %d\n", ret); |
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return ret; |
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} |
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ret = regmap_add_irq_chip(axp20x->regmap, i2c->irq, |
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IRQF_ONESHOT | IRQF_SHARED, -1, |
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&axp20x_regmap_irq_chip, |
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&axp20x->regmap_irqc); |
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if (ret) { |
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dev_err(&i2c->dev, "failed to add irq chip: %d\n", ret); |
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return ret; |
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} |
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ret = mfd_add_devices(axp20x->dev, -1, axp20x_cells, |
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ARRAY_SIZE(axp20x_cells), NULL, 0, NULL); |
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if (ret) { |
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dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); |
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regmap_del_irq_chip(i2c->irq, axp20x->regmap_irqc); |
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return ret; |
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} |
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if (!pm_power_off) { |
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axp20x_pm_power_off = axp20x; |
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pm_power_off = axp20x_power_off; |
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} |
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dev_info(&i2c->dev, "AXP20X driver loaded\n"); |
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return 0; |
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} |
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static int axp20x_i2c_remove(struct i2c_client *i2c) |
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{ |
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struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); |
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if (axp20x == axp20x_pm_power_off) { |
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axp20x_pm_power_off = NULL; |
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pm_power_off = NULL; |
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} |
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mfd_remove_devices(axp20x->dev); |
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regmap_del_irq_chip(axp20x->i2c_client->irq, axp20x->regmap_irqc); |
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return 0; |
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} |
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static struct i2c_driver axp20x_i2c_driver = { |
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.driver = { |
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.name = "axp20x", |
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.owner = THIS_MODULE, |
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.of_match_table = of_match_ptr(axp20x_of_match), |
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}, |
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.probe = axp20x_i2c_probe, |
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.remove = axp20x_i2c_remove, |
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.id_table = axp20x_i2c_id, |
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}; |
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module_i2c_driver(axp20x_i2c_driver); |
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MODULE_DESCRIPTION("PMIC MFD core driver for AXP20X"); |
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MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); |
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MODULE_LICENSE("GPL");
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