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d02e83cbcc
Replace tps65910_misc_init with a dedicated init function for the 32-kHz-crystal input, and make the code more readable. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
319 lines
7.7 KiB
C
319 lines
7.7 KiB
C
/*
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* tps65910.c -- TI TPS6591x
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*
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* Copyright 2010 Texas Instruments Inc.
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*
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* Author: Graeme Gregory <gg@slimlogic.co.uk>
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* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/err.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/regmap.h>
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#include <linux/mfd/tps65910.h>
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#include <linux/of_device.h>
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static struct mfd_cell tps65910s[] = {
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{
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.name = "tps65910-gpio",
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},
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{
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.name = "tps65910-pmic",
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},
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{
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.name = "tps65910-rtc",
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},
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{
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.name = "tps65910-power",
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},
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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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struct tps65910 *tps65910 = dev_get_drvdata(dev);
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/*
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* Caching all regulator registers.
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* All regualator register address range is same for
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* TPS65910 and TPS65911
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*/
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if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
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/* Check for non-existing register */
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if (tps65910_chip_id(tps65910) == TPS65910)
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if ((reg == TPS65911_VDDCTRL_OP) ||
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(reg == TPS65911_VDDCTRL_SR))
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return true;
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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 tps65910_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.volatile_reg = is_volatile_reg,
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.max_register = TPS65910_MAX_REGISTER - 1,
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.cache_type = REGCACHE_RBTREE,
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};
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static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910,
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struct tps65910_board *pmic_pdata)
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{
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int ret;
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if (!pmic_pdata->en_ck32k_xtal)
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return 0;
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ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
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DEVCTRL_CK32K_CTRL_MASK);
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if (ret < 0) {
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dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
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struct tps65910_board *pmic_pdata)
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{
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struct device *dev = NULL;
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int ret = 0;
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dev = tps65910->dev;
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if (!pmic_pdata->en_dev_slp)
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return 0;
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/* enabling SLEEP device state */
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ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
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DEVCTRL_DEV_SLP_MASK);
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if (ret < 0) {
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dev_err(dev, "set dev_slp failed: %d\n", ret);
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goto err_sleep_init;
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}
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/* Return if there is no sleep keepon data. */
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if (!pmic_pdata->slp_keepon)
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return 0;
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if (pmic_pdata->slp_keepon->therm_keepon) {
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ret = tps65910_reg_set_bits(tps65910,
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TPS65910_SLEEP_KEEP_RES_ON,
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SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
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if (ret < 0) {
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dev_err(dev, "set therm_keepon failed: %d\n", ret);
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goto disable_dev_slp;
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}
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}
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if (pmic_pdata->slp_keepon->clkout32k_keepon) {
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ret = tps65910_reg_set_bits(tps65910,
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TPS65910_SLEEP_KEEP_RES_ON,
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SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
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if (ret < 0) {
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dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
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goto disable_dev_slp;
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}
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}
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if (pmic_pdata->slp_keepon->i2chs_keepon) {
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ret = tps65910_reg_set_bits(tps65910,
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TPS65910_SLEEP_KEEP_RES_ON,
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SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
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if (ret < 0) {
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dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
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goto disable_dev_slp;
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}
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}
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return 0;
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disable_dev_slp:
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tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
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DEVCTRL_DEV_SLP_MASK);
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err_sleep_init:
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return ret;
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}
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#ifdef CONFIG_OF
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static struct of_device_id tps65910_of_match[] = {
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{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
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{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
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{ },
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};
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MODULE_DEVICE_TABLE(of, tps65910_of_match);
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static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
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int *chip_id)
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{
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struct device_node *np = client->dev.of_node;
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struct tps65910_board *board_info;
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unsigned int prop;
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const struct of_device_id *match;
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int ret = 0;
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match = of_match_device(tps65910_of_match, &client->dev);
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if (!match) {
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dev_err(&client->dev, "Failed to find matching dt id\n");
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return NULL;
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}
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*chip_id = (int)match->data;
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board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
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GFP_KERNEL);
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if (!board_info) {
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dev_err(&client->dev, "Failed to allocate pdata\n");
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return NULL;
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}
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ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
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if (!ret)
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board_info->vmbch_threshold = prop;
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else if (*chip_id == TPS65911)
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dev_warn(&client->dev, "VMBCH-Threshold not specified");
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ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
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if (!ret)
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board_info->vmbch2_threshold = prop;
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else if (*chip_id == TPS65911)
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dev_warn(&client->dev, "VMBCH2-Threshold not specified");
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prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
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board_info->en_ck32k_xtal = prop;
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board_info->irq = client->irq;
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board_info->irq_base = -1;
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return board_info;
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}
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#else
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static inline
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struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
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int *chip_id)
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{
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return NULL;
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}
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#endif
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static __devinit int tps65910_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 tps65910 *tps65910;
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struct tps65910_board *pmic_plat_data;
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struct tps65910_board *of_pmic_plat_data = NULL;
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struct tps65910_platform_data *init_data;
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int ret = 0;
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int chip_id = id->driver_data;
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pmic_plat_data = dev_get_platdata(&i2c->dev);
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if (!pmic_plat_data && i2c->dev.of_node) {
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pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
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of_pmic_plat_data = pmic_plat_data;
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}
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if (!pmic_plat_data)
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return -EINVAL;
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init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
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if (init_data == NULL)
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return -ENOMEM;
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tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
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if (tps65910 == NULL)
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return -ENOMEM;
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tps65910->of_plat_data = of_pmic_plat_data;
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i2c_set_clientdata(i2c, tps65910);
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tps65910->dev = &i2c->dev;
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tps65910->i2c_client = i2c;
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tps65910->id = chip_id;
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mutex_init(&tps65910->io_mutex);
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tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
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if (IS_ERR(tps65910->regmap)) {
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ret = PTR_ERR(tps65910->regmap);
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dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
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return ret;
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}
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ret = mfd_add_devices(tps65910->dev, -1,
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tps65910s, ARRAY_SIZE(tps65910s),
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NULL, 0);
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if (ret < 0) {
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dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
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return ret;
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}
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init_data->irq = pmic_plat_data->irq;
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init_data->irq_base = pmic_plat_data->irq_base;
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tps65910_irq_init(tps65910, init_data->irq, init_data);
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tps65910_ck32k_init(tps65910, pmic_plat_data);
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tps65910_sleepinit(tps65910, pmic_plat_data);
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return ret;
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}
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static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
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{
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struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
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tps65910_irq_exit(tps65910);
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mfd_remove_devices(tps65910->dev);
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return 0;
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}
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static const struct i2c_device_id tps65910_i2c_id[] = {
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{ "tps65910", TPS65910 },
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{ "tps65911", TPS65911 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
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static struct i2c_driver tps65910_i2c_driver = {
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.driver = {
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.name = "tps65910",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(tps65910_of_match),
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},
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.probe = tps65910_i2c_probe,
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.remove = __devexit_p(tps65910_i2c_remove),
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.id_table = tps65910_i2c_id,
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};
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static int __init tps65910_i2c_init(void)
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{
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return i2c_add_driver(&tps65910_i2c_driver);
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}
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/* init early so consumer devices can complete system boot */
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subsys_initcall(tps65910_i2c_init);
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static void __exit tps65910_i2c_exit(void)
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{
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i2c_del_driver(&tps65910_i2c_driver);
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}
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module_exit(tps65910_i2c_exit);
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MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
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MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
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MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
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MODULE_LICENSE("GPL");
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