--- /dev/null
+/*
+ * Core driver for TI TPS65090 PMIC family
+ *
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65090.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/err.h>
+
+#define NUM_INT_REG 2
+#define TOTAL_NUM_REG 0x18
+
+#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
+#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
+#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
+#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
+#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
+#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
+#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
+#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
+#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
+#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
+#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
+#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
+#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
+#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
+#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
+
+static struct resource charger_resources[] = {
+ {
+ .start = TPS65090_IRQ_VAC_STATUS_CHANGE,
+ .end = TPS65090_IRQ_VAC_STATUS_CHANGE,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+enum tps65090_cells {
+ PMIC = 0,
+ CHARGER = 1,
+};
+
+static struct mfd_cell tps65090s[] = {
+ [PMIC] = {
+ .name = "tps65090-pmic",
+ },
+ [CHARGER] = {
+ .name = "tps65090-charger",
+ .num_resources = ARRAY_SIZE(charger_resources),
+ .resources = &charger_resources[0],
+ .of_compatible = "ti,tps65090-charger",
+ },
+};
+
+static const struct regmap_irq tps65090_irqs[] = {
+ /* INT1 IRQs*/
+ [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_CHARGING_COMPLETE] = {
+ .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
+ },
+ [TPS65090_IRQ_OVERLOAD_DCDC1] = {
+ .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
+ },
+ [TPS65090_IRQ_OVERLOAD_DCDC2] = {
+ .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
+ },
+ /* INT2 IRQs*/
+ [TPS65090_IRQ_OVERLOAD_DCDC3] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET1] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET2] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET3] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET4] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET5] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET6] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET7] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
+ },
+};
+
+static struct regmap_irq_chip tps65090_irq_chip = {
+ .name = "tps65090",
+ .irqs = tps65090_irqs,
+ .num_irqs = ARRAY_SIZE(tps65090_irqs),
+ .num_regs = NUM_INT_REG,
+ .status_base = TPS65090_REG_INTR_STS,
+ .mask_base = TPS65090_REG_INTR_MASK,
+ .mask_invert = true,
+};
+
+static bool is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ /* Nearly all registers have status bits mixed in, except a few */
+ switch (reg) {
+ case TPS65090_REG_INTR_MASK:
+ case TPS65090_REG_INTR_MASK2:
+ case TPS65090_REG_CG_CTRL0:
+ case TPS65090_REG_CG_CTRL1:
+ case TPS65090_REG_CG_CTRL2:
+ case TPS65090_REG_CG_CTRL3:
+ case TPS65090_REG_CG_CTRL4:
+ case TPS65090_REG_CG_CTRL5:
+ return false;
+ }
+ return true;
+}
+
+static const struct regmap_config tps65090_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TOTAL_NUM_REG,
+ .num_reg_defaults_raw = TOTAL_NUM_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = is_volatile_reg,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id tps65090_of_match[] = {
+ { .compatible = "ti,tps65090",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, tps65090_of_match);
+#endif
+
+static int tps65090_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
+ int irq_base = 0;
+ struct tps65090 *tps65090;
+ int ret;
+
+ if (!pdata && !client->dev.of_node) {
+ dev_err(&client->dev,
+ "tps65090 requires platform data or of_node\n");
+ return -EINVAL;
+ }
+
+ if (pdata)
+ irq_base = pdata->irq_base;
+
+ tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
+ if (!tps65090) {
+ dev_err(&client->dev, "mem alloc for tps65090 failed\n");
+ return -ENOMEM;
+ }
+
+ tps65090->dev = &client->dev;
+ i2c_set_clientdata(client, tps65090);
+
+ tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
+ if (IS_ERR(tps65090->rmap)) {
+ ret = PTR_ERR(tps65090->rmap);
+ dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
+ return ret;
+ }
+
+ if (client->irq) {
+ ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
+ IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
+ &tps65090_irq_chip, &tps65090->irq_data);
+ if (ret) {
+ dev_err(&client->dev,
+ "IRQ init failed with err: %d\n", ret);
+ return ret;
+ }
+ } else {
+ /* Don't tell children they have an IRQ that'll never fire */
+ tps65090s[CHARGER].num_resources = 0;
+ }
+
+ ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
+ ARRAY_SIZE(tps65090s), NULL,
+ 0, regmap_irq_get_domain(tps65090->irq_data));
+ if (ret) {
+ dev_err(&client->dev, "add mfd devices failed with err: %d\n",
+ ret);
+ goto err_irq_exit;
+ }
+
+ return 0;
+
+err_irq_exit:
+ if (client->irq)
+ regmap_del_irq_chip(client->irq, tps65090->irq_data);
+ return ret;
+}
+
+static int tps65090_i2c_remove(struct i2c_client *client)
+{
+ struct tps65090 *tps65090 = i2c_get_clientdata(client);
+
+ mfd_remove_devices(tps65090->dev);
+ if (client->irq)
+ regmap_del_irq_chip(client->irq, tps65090->irq_data);
+
+ return 0;
+}
+
+static const struct i2c_device_id tps65090_id_table[] = {
+ { "tps65090", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
+
+static struct i2c_driver tps65090_driver = {
+ .driver = {
+ .name = "tps65090",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(tps65090_of_match),
+ },
+ .probe = tps65090_i2c_probe,
+ .remove = tps65090_i2c_remove,
+ .id_table = tps65090_id_table,
+};
+
+static int __init tps65090_init(void)
+{
+ return i2c_add_driver(&tps65090_driver);
+}
+subsys_initcall(tps65090_init);
+
+static void __exit tps65090_exit(void)
+{
+ i2c_del_driver(&tps65090_driver);
+}
+module_exit(tps65090_exit);
+
+MODULE_DESCRIPTION("TPS65090 core driver");
+MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff