summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/tps65218.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd/tps65218.c')
-rw-r--r--drivers/mfd/tps65218.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
new file mode 100644
index 0000000000..11e4e52b56
--- /dev/null
+++ b/drivers/mfd/tps65218.c
@@ -0,0 +1,357 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for TPS65218 Integrated power management chipsets
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65218.h>
+
+#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
+
+static const struct mfd_cell tps65218_cells[] = {
+ {
+ .name = "tps65218-pwrbutton",
+ .of_compatible = "ti,tps65218-pwrbutton",
+ },
+ {
+ .name = "tps65218-gpio",
+ .of_compatible = "ti,tps65218-gpio",
+ },
+ { .name = "tps65218-regulator", },
+};
+
+/**
+ * tps65218_reg_write: Write a single tps65218 register.
+ *
+ * @tps: Device to write to.
+ * @reg: Register to write to.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
+ unsigned int val, unsigned int level)
+{
+ int ret;
+ unsigned int xor_reg_val;
+
+ switch (level) {
+ case TPS65218_PROTECT_NONE:
+ return regmap_write(tps->regmap, reg, val);
+ case TPS65218_PROTECT_L1:
+ xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
+ ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
+ xor_reg_val);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write(tps->regmap, reg, val);
+ default:
+ return -EINVAL;
+ }
+}
+EXPORT_SYMBOL_GPL(tps65218_reg_write);
+
+/**
+ * tps65218_update_bits: Modify bits w.r.t mask, val and level.
+ *
+ * @tps: Device to write to.
+ * @reg: Register to read-write to.
+ * @mask: Mask.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
+ unsigned int mask, unsigned int val, unsigned int level)
+{
+ int ret;
+ unsigned int data;
+
+ ret = regmap_read(tps->regmap, reg, &data);
+ if (ret) {
+ dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
+ return ret;
+ }
+
+ data &= ~mask;
+ data |= val & mask;
+
+ mutex_lock(&tps->tps_lock);
+ ret = tps65218_reg_write(tps, reg, data, level);
+ if (ret)
+ dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
+ mutex_unlock(&tps->tps_lock);
+
+ return ret;
+}
+
+int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
+ unsigned int mask, unsigned int val, unsigned int level)
+{
+ return tps65218_update_bits(tps, reg, mask, val, level);
+}
+EXPORT_SYMBOL_GPL(tps65218_set_bits);
+
+int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
+ unsigned int mask, unsigned int level)
+{
+ return tps65218_update_bits(tps, reg, mask, 0, level);
+}
+EXPORT_SYMBOL_GPL(tps65218_clear_bits);
+
+static const struct regmap_range tps65218_yes_ranges[] = {
+ regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
+ regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
+};
+
+static const struct regmap_access_table tps65218_volatile_table = {
+ .yes_ranges = tps65218_yes_ranges,
+ .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
+};
+
+static const struct regmap_config tps65218_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_table = &tps65218_volatile_table,
+};
+
+static const struct regmap_irq tps65218_irqs[] = {
+ /* INT1 IRQs */
+ [TPS65218_PRGC_IRQ] = {
+ .mask = TPS65218_INT1_PRGC,
+ },
+ [TPS65218_CC_AQC_IRQ] = {
+ .mask = TPS65218_INT1_CC_AQC,
+ },
+ [TPS65218_HOT_IRQ] = {
+ .mask = TPS65218_INT1_HOT,
+ },
+ [TPS65218_PB_IRQ] = {
+ .mask = TPS65218_INT1_PB,
+ },
+ [TPS65218_AC_IRQ] = {
+ .mask = TPS65218_INT1_AC,
+ },
+ [TPS65218_VPRG_IRQ] = {
+ .mask = TPS65218_INT1_VPRG,
+ },
+ [TPS65218_INVALID1_IRQ] = {
+ },
+ [TPS65218_INVALID2_IRQ] = {
+ },
+ /* INT2 IRQs*/
+ [TPS65218_LS1_I_IRQ] = {
+ .mask = TPS65218_INT2_LS1_I,
+ .reg_offset = 1,
+ },
+ [TPS65218_LS2_I_IRQ] = {
+ .mask = TPS65218_INT2_LS2_I,
+ .reg_offset = 1,
+ },
+ [TPS65218_LS3_I_IRQ] = {
+ .mask = TPS65218_INT2_LS3_I,
+ .reg_offset = 1,
+ },
+ [TPS65218_LS1_F_IRQ] = {
+ .mask = TPS65218_INT2_LS1_F,
+ .reg_offset = 1,
+ },
+ [TPS65218_LS2_F_IRQ] = {
+ .mask = TPS65218_INT2_LS2_F,
+ .reg_offset = 1,
+ },
+ [TPS65218_LS3_F_IRQ] = {
+ .mask = TPS65218_INT2_LS3_F,
+ .reg_offset = 1,
+ },
+ [TPS65218_INVALID3_IRQ] = {
+ },
+ [TPS65218_INVALID4_IRQ] = {
+ },
+};
+
+static struct regmap_irq_chip tps65218_irq_chip = {
+ .name = "tps65218",
+ .irqs = tps65218_irqs,
+ .num_irqs = ARRAY_SIZE(tps65218_irqs),
+
+ .num_regs = 2,
+ .mask_base = TPS65218_REG_INT_MASK1,
+ .status_base = TPS65218_REG_INT1,
+};
+
+static const struct of_device_id of_tps65218_match_table[] = {
+ { .compatible = "ti,tps65218", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
+
+static int tps65218_voltage_set_strict(struct tps65218 *tps)
+{
+ u32 strict;
+
+ if (of_property_read_u32(tps->dev->of_node,
+ "ti,strict-supply-voltage-supervision",
+ &strict))
+ return 0;
+
+ if (strict != 0 && strict != 1) {
+ dev_err(tps->dev,
+ "Invalid ti,strict-supply-voltage-supervision value\n");
+ return -EINVAL;
+ }
+
+ tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
+ TPS65218_CONFIG1_STRICT,
+ strict ? TPS65218_CONFIG1_STRICT : 0,
+ TPS65218_PROTECT_L1);
+ return 0;
+}
+
+static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)
+{
+ u32 hyst;
+
+ if (of_property_read_u32(tps->dev->of_node,
+ "ti,under-voltage-hyst-microvolt", &hyst))
+ return 0;
+
+ if (hyst != 400000 && hyst != 200000) {
+ dev_err(tps->dev,
+ "Invalid ti,under-voltage-hyst-microvolt value\n");
+ return -EINVAL;
+ }
+
+ tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
+ TPS65218_CONFIG2_UVLOHYS,
+ hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
+ TPS65218_PROTECT_L1);
+ return 0;
+}
+
+static int tps65218_voltage_set_uvlo(struct tps65218 *tps)
+{
+ u32 uvlo;
+ int uvloval;
+
+ if (of_property_read_u32(tps->dev->of_node,
+ "ti,under-voltage-limit-microvolt", &uvlo))
+ return 0;
+
+ switch (uvlo) {
+ case 2750000:
+ uvloval = TPS65218_CONFIG1_UVLO_2750000;
+ break;
+ case 2950000:
+ uvloval = TPS65218_CONFIG1_UVLO_2950000;
+ break;
+ case 3250000:
+ uvloval = TPS65218_CONFIG1_UVLO_3250000;
+ break;
+ case 3350000:
+ uvloval = TPS65218_CONFIG1_UVLO_3350000;
+ break;
+ default:
+ dev_err(tps->dev,
+ "Invalid ti,under-voltage-limit-microvolt value\n");
+ return -EINVAL;
+ }
+
+ tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
+ TPS65218_CONFIG1_UVLO_MASK, uvloval,
+ TPS65218_PROTECT_L1);
+ return 0;
+}
+
+static int tps65218_probe(struct i2c_client *client)
+{
+ struct tps65218 *tps;
+ int ret;
+ unsigned int chipid;
+
+ tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
+ if (!tps)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, tps);
+ tps->dev = &client->dev;
+ tps->irq = client->irq;
+ tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
+ if (IS_ERR(tps->regmap)) {
+ ret = PTR_ERR(tps->regmap);
+ dev_err(tps->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ mutex_init(&tps->tps_lock);
+
+ ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq,
+ IRQF_ONESHOT, 0, &tps65218_irq_chip,
+ &tps->irq_data);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);
+ if (ret) {
+ dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
+ return ret;
+ }
+
+ tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
+
+ ret = tps65218_voltage_set_strict(tps);
+ if (ret)
+ return ret;
+
+ ret = tps65218_voltage_set_uvlo(tps);
+ if (ret)
+ return ret;
+
+ ret = tps65218_voltage_set_uv_hyst(tps);
+ if (ret)
+ return ret;
+
+ ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
+ ARRAY_SIZE(tps65218_cells), NULL, 0,
+ regmap_irq_get_domain(tps->irq_data));
+
+ return ret;
+}
+
+static const struct i2c_device_id tps65218_id_table[] = {
+ { "tps65218", TPS65218 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
+
+static struct i2c_driver tps65218_driver = {
+ .driver = {
+ .name = "tps65218",
+ .of_match_table = of_tps65218_match_table,
+ },
+ .probe = tps65218_probe,
+ .id_table = tps65218_id_table,
+};
+
+module_i2c_driver(tps65218_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
+MODULE_LICENSE("GPL v2");