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Diffstat (limited to 'drivers/mfd/max77541.c')
-rw-r--r--drivers/mfd/max77541.c224
1 files changed, 224 insertions, 0 deletions
diff --git a/drivers/mfd/max77541.c b/drivers/mfd/max77541.c
new file mode 100644
index 0000000000..10c2e274b4
--- /dev/null
+++ b/drivers/mfd/max77541.c
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2022 Analog Devices, Inc.
+ * Driver for the MAX77540 and MAX77541
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77541.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+
+static const struct regmap_config max77541_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static const struct regmap_irq max77541_src_irqs[] = {
+ { .mask = MAX77541_BIT_INT_SRC_TOPSYS },
+ { .mask = MAX77541_BIT_INT_SRC_BUCK },
+};
+
+static const struct regmap_irq_chip max77541_src_irq_chip = {
+ .name = "max77541-src",
+ .status_base = MAX77541_REG_INT_SRC,
+ .mask_base = MAX77541_REG_INT_SRC_M,
+ .num_regs = 1,
+ .irqs = max77541_src_irqs,
+ .num_irqs = ARRAY_SIZE(max77541_src_irqs),
+};
+
+static const struct regmap_irq max77541_topsys_irqs[] = {
+ { .mask = MAX77541_BIT_TOPSYS_INT_TJ_120C },
+ { .mask = MAX77541_BIT_TOPSYS_INT_TJ_140C },
+ { .mask = MAX77541_BIT_TOPSYS_INT_TSHDN },
+ { .mask = MAX77541_BIT_TOPSYS_INT_UVLO },
+ { .mask = MAX77541_BIT_TOPSYS_INT_ALT_SWO },
+ { .mask = MAX77541_BIT_TOPSYS_INT_EXT_FREQ_DET },
+};
+
+static const struct regmap_irq_chip max77541_topsys_irq_chip = {
+ .name = "max77541-topsys",
+ .status_base = MAX77541_REG_TOPSYS_INT,
+ .mask_base = MAX77541_REG_TOPSYS_INT_M,
+ .num_regs = 1,
+ .irqs = max77541_topsys_irqs,
+ .num_irqs = ARRAY_SIZE(max77541_topsys_irqs),
+};
+
+static const struct regmap_irq max77541_buck_irqs[] = {
+ { .mask = MAX77541_BIT_BUCK_INT_M1_POK_FLT },
+ { .mask = MAX77541_BIT_BUCK_INT_M2_POK_FLT },
+ { .mask = MAX77541_BIT_BUCK_INT_M1_SCFLT },
+ { .mask = MAX77541_BIT_BUCK_INT_M2_SCFLT },
+};
+
+static const struct regmap_irq_chip max77541_buck_irq_chip = {
+ .name = "max77541-buck",
+ .status_base = MAX77541_REG_BUCK_INT,
+ .mask_base = MAX77541_REG_BUCK_INT_M,
+ .num_regs = 1,
+ .irqs = max77541_buck_irqs,
+ .num_irqs = ARRAY_SIZE(max77541_buck_irqs),
+};
+
+static const struct regmap_irq max77541_adc_irqs[] = {
+ { .mask = MAX77541_BIT_ADC_INT_CH1_I },
+ { .mask = MAX77541_BIT_ADC_INT_CH2_I },
+ { .mask = MAX77541_BIT_ADC_INT_CH3_I },
+ { .mask = MAX77541_BIT_ADC_INT_CH6_I },
+};
+
+static const struct regmap_irq_chip max77541_adc_irq_chip = {
+ .name = "max77541-adc",
+ .status_base = MAX77541_REG_ADC_INT,
+ .mask_base = MAX77541_REG_ADC_INT_M,
+ .num_regs = 1,
+ .irqs = max77541_adc_irqs,
+ .num_irqs = ARRAY_SIZE(max77541_adc_irqs),
+};
+
+static const struct mfd_cell max77540_devs[] = {
+ MFD_CELL_OF("max77540-regulator", NULL, NULL, 0, 0, NULL),
+};
+
+static const struct mfd_cell max77541_devs[] = {
+ MFD_CELL_OF("max77541-regulator", NULL, NULL, 0, 0, NULL),
+ MFD_CELL_OF("max77541-adc", NULL, NULL, 0, 0, NULL),
+};
+
+static int max77541_pmic_irq_init(struct device *dev)
+{
+ struct max77541 *max77541 = dev_get_drvdata(dev);
+ int irq = max77541->i2c->irq;
+ int ret;
+
+ ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
+ &max77541_src_irq_chip,
+ &max77541->irq_data);
+ if (ret)
+ return ret;
+
+ ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
+ &max77541_topsys_irq_chip,
+ &max77541->irq_topsys);
+ if (ret)
+ return ret;
+
+ ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
+ &max77541_buck_irq_chip,
+ &max77541->irq_buck);
+ if (ret)
+ return ret;
+
+ if (max77541->id == MAX77541) {
+ ret = devm_regmap_add_irq_chip(dev, max77541->regmap, irq,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
+ &max77541_adc_irq_chip,
+ &max77541->irq_adc);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int max77541_pmic_setup(struct device *dev)
+{
+ struct max77541 *max77541 = dev_get_drvdata(dev);
+ const struct mfd_cell *cells;
+ int n_devs;
+ int ret;
+
+ switch (max77541->id) {
+ case MAX77540:
+ cells = max77540_devs;
+ n_devs = ARRAY_SIZE(max77540_devs);
+ break;
+ case MAX77541:
+ cells = max77541_devs;
+ n_devs = ARRAY_SIZE(max77541_devs);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = max77541_pmic_irq_init(dev);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to initialize IRQ\n");
+
+ ret = device_init_wakeup(dev, true);
+ if (ret)
+ return dev_err_probe(dev, ret, "Unable to init wakeup\n");
+
+ return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
+ cells, n_devs, NULL, 0, NULL);
+}
+
+static int max77541_probe(struct i2c_client *client)
+{
+ const struct i2c_device_id *id = i2c_client_get_device_id(client);
+ struct device *dev = &client->dev;
+ struct max77541 *max77541;
+
+ max77541 = devm_kzalloc(dev, sizeof(*max77541), GFP_KERNEL);
+ if (!max77541)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, max77541);
+ max77541->i2c = client;
+
+ max77541->id = (uintptr_t)device_get_match_data(dev);
+ if (!max77541->id)
+ max77541->id = (enum max7754x_ids)id->driver_data;
+
+ if (!max77541->id)
+ return -EINVAL;
+
+ max77541->regmap = devm_regmap_init_i2c(client,
+ &max77541_regmap_config);
+ if (IS_ERR(max77541->regmap))
+ return dev_err_probe(dev, PTR_ERR(max77541->regmap),
+ "Failed to allocate register map\n");
+
+ return max77541_pmic_setup(dev);
+}
+
+static const struct of_device_id max77541_of_id[] = {
+ {
+ .compatible = "adi,max77540",
+ .data = (void *)MAX77540,
+ },
+ {
+ .compatible = "adi,max77541",
+ .data = (void *)MAX77541,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max77541_of_id);
+
+static const struct i2c_device_id max77541_id[] = {
+ { "max77540", MAX77540 },
+ { "max77541", MAX77541 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max77541_id);
+
+static struct i2c_driver max77541_driver = {
+ .driver = {
+ .name = "max77541",
+ .of_match_table = max77541_of_id,
+ },
+ .probe = max77541_probe,
+ .id_table = max77541_id,
+};
+module_i2c_driver(max77541_driver);
+
+MODULE_DESCRIPTION("MAX7740/MAX7741 Driver");
+MODULE_AUTHOR("Okan Sahin <okan.sahin@analog.com>");
+MODULE_LICENSE("GPL");