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8a232f0b0d
Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Lee Jones <lee.jones@linaro.org>
280 lines
7.2 KiB
C
280 lines
7.2 KiB
C
/*
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* Core driver for TI TPS65090 PMIC family
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*
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* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tps65090.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/err.h>
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#define NUM_INT_REG 2
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#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
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#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
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#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
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#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
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#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
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#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
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#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
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#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
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#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
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#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
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#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
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#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
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#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
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#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
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#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
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static struct resource charger_resources[] = {
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{
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.start = TPS65090_IRQ_VAC_STATUS_CHANGE,
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.end = TPS65090_IRQ_VAC_STATUS_CHANGE,
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.flags = IORESOURCE_IRQ,
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}
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};
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enum tps65090_cells {
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PMIC = 0,
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CHARGER = 1,
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};
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static struct mfd_cell tps65090s[] = {
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[PMIC] = {
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.name = "tps65090-pmic",
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},
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[CHARGER] = {
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.name = "tps65090-charger",
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.num_resources = ARRAY_SIZE(charger_resources),
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.resources = &charger_resources[0],
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.of_compatible = "ti,tps65090-charger",
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},
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};
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static const struct regmap_irq tps65090_irqs[] = {
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/* INT1 IRQs*/
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[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
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.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
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},
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[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
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.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
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},
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[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
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.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
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},
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[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
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.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
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},
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[TPS65090_IRQ_CHARGING_COMPLETE] = {
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.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
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},
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[TPS65090_IRQ_OVERLOAD_DCDC1] = {
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.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
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},
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[TPS65090_IRQ_OVERLOAD_DCDC2] = {
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.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
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},
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/* INT2 IRQs*/
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[TPS65090_IRQ_OVERLOAD_DCDC3] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
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},
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[TPS65090_IRQ_OVERLOAD_FET1] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
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},
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[TPS65090_IRQ_OVERLOAD_FET2] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
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},
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[TPS65090_IRQ_OVERLOAD_FET3] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
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},
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[TPS65090_IRQ_OVERLOAD_FET4] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
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},
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[TPS65090_IRQ_OVERLOAD_FET5] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
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},
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[TPS65090_IRQ_OVERLOAD_FET6] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
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},
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[TPS65090_IRQ_OVERLOAD_FET7] = {
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.reg_offset = 1,
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.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
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},
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};
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static struct regmap_irq_chip tps65090_irq_chip = {
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.name = "tps65090",
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.irqs = tps65090_irqs,
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.num_irqs = ARRAY_SIZE(tps65090_irqs),
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.num_regs = NUM_INT_REG,
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.status_base = TPS65090_REG_INTR_STS,
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.mask_base = TPS65090_REG_INTR_MASK,
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.mask_invert = true,
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};
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static bool is_volatile_reg(struct device *dev, unsigned int reg)
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{
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/* Nearly all registers have status bits mixed in, except a few */
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switch (reg) {
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case TPS65090_REG_INTR_MASK:
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case TPS65090_REG_INTR_MASK2:
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case TPS65090_REG_CG_CTRL0:
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case TPS65090_REG_CG_CTRL1:
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case TPS65090_REG_CG_CTRL2:
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case TPS65090_REG_CG_CTRL3:
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case TPS65090_REG_CG_CTRL4:
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case TPS65090_REG_CG_CTRL5:
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return false;
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}
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return true;
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}
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static const struct regmap_config tps65090_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = TPS65090_MAX_REG,
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.num_reg_defaults_raw = TPS65090_NUM_REGS,
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.cache_type = REGCACHE_RBTREE,
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.volatile_reg = is_volatile_reg,
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};
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#ifdef CONFIG_OF
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static const struct of_device_id tps65090_of_match[] = {
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{ .compatible = "ti,tps65090",},
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{},
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};
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MODULE_DEVICE_TABLE(of, tps65090_of_match);
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#endif
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static int tps65090_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
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int irq_base = 0;
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struct tps65090 *tps65090;
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int ret;
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if (!pdata && !client->dev.of_node) {
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dev_err(&client->dev,
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"tps65090 requires platform data or of_node\n");
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return -EINVAL;
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}
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if (pdata)
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irq_base = pdata->irq_base;
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tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
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if (!tps65090)
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return -ENOMEM;
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tps65090->dev = &client->dev;
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i2c_set_clientdata(client, tps65090);
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tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
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if (IS_ERR(tps65090->rmap)) {
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ret = PTR_ERR(tps65090->rmap);
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dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
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return ret;
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}
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if (client->irq) {
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ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
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IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
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&tps65090_irq_chip, &tps65090->irq_data);
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if (ret) {
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dev_err(&client->dev,
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"IRQ init failed with err: %d\n", ret);
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return ret;
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}
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} else {
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/* Don't tell children they have an IRQ that'll never fire */
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tps65090s[CHARGER].num_resources = 0;
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}
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ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
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ARRAY_SIZE(tps65090s), NULL,
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0, regmap_irq_get_domain(tps65090->irq_data));
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if (ret) {
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dev_err(&client->dev, "add mfd devices failed with err: %d\n",
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ret);
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goto err_irq_exit;
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}
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return 0;
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err_irq_exit:
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if (client->irq)
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regmap_del_irq_chip(client->irq, tps65090->irq_data);
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return ret;
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}
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static int tps65090_i2c_remove(struct i2c_client *client)
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{
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struct tps65090 *tps65090 = i2c_get_clientdata(client);
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mfd_remove_devices(tps65090->dev);
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if (client->irq)
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regmap_del_irq_chip(client->irq, tps65090->irq_data);
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return 0;
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}
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static const struct i2c_device_id tps65090_id_table[] = {
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{ "tps65090", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
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static struct i2c_driver tps65090_driver = {
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.driver = {
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.name = "tps65090",
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.of_match_table = of_match_ptr(tps65090_of_match),
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},
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.probe = tps65090_i2c_probe,
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.remove = tps65090_i2c_remove,
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.id_table = tps65090_id_table,
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};
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static int __init tps65090_init(void)
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{
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return i2c_add_driver(&tps65090_driver);
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}
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subsys_initcall(tps65090_init);
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static void __exit tps65090_exit(void)
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{
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i2c_del_driver(&tps65090_driver);
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}
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module_exit(tps65090_exit);
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MODULE_DESCRIPTION("TPS65090 core driver");
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MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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