diff options
| -rw-r--r-- | drivers/regulator/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/regulator/Makefile | 1 | ||||
| -rw-r--r-- | drivers/regulator/db8500-prcmu.c | 118 | ||||
| -rw-r--r-- | drivers/regulator/dbx500-prcmu.c | 241 | ||||
| -rw-r--r-- | drivers/regulator/dbx500-prcmu.h | 63 |
5 files changed, 341 insertions, 86 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index b9ad3d8e03c..c7e49b140be 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -299,9 +299,13 @@ config REGULATOR_AB8500 This driver supports the regulators found on the ST-Ericsson mixed signal AB8500 PMIC +config REGULATOR_DBX500_PRCMU + bool + config REGULATOR_DB8500_PRCMU bool "ST-Ericsson DB8500 Voltage Domain Regulators" depends on MFD_DB8500_PRCMU + select REGULATOR_DBX500_PRCMU help This driver supports the voltage domain regulators controlled by the DB8500 PRCMU diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 1668b2e667c..bf595135248 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o +obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o diff --git a/drivers/regulator/db8500-prcmu.c b/drivers/regulator/db8500-prcmu.c index 515443fcd26..4bd25e75efa 100644 --- a/drivers/regulator/db8500-prcmu.c +++ b/drivers/regulator/db8500-prcmu.c @@ -18,74 +18,11 @@ #include <linux/regulator/machine.h> #include <linux/regulator/db8500-prcmu.h> #include <linux/module.h> - -/* - * power state reference count - */ -static int power_state_active_cnt; /* will initialize to zero */ -static DEFINE_SPINLOCK(power_state_active_lock); - -static void power_state_active_enable(void) -{ - unsigned long flags; - - spin_lock_irqsave(&power_state_active_lock, flags); - power_state_active_cnt++; - spin_unlock_irqrestore(&power_state_active_lock, flags); -} - -static int power_state_active_disable(void) -{ - int ret = 0; - unsigned long flags; - - spin_lock_irqsave(&power_state_active_lock, flags); - if (power_state_active_cnt <= 0) { - pr_err("power state: unbalanced enable/disable calls\n"); - ret = -EINVAL; - goto out; - } - - power_state_active_cnt--; -out: - spin_unlock_irqrestore(&power_state_active_lock, flags); - return ret; -} - -/* - * Exported interface for CPUIdle only. This function is called when interrupts - * are turned off. Hence, no locking. - */ -int power_state_active_is_enabled(void) -{ - return (power_state_active_cnt > 0); -} - -/** - * struct db8500_regulator_info - db8500 regulator information - * @dev: device pointer - * @desc: regulator description - * @rdev: regulator device pointer - * @is_enabled: status of the regulator - * @epod_id: id for EPOD (power domain) - * @is_ramret: RAM retention switch for EPOD (power domain) - * @operating_point: operating point (only for vape, to be removed) - * - */ -struct db8500_regulator_info { - struct device *dev; - struct regulator_desc desc; - struct regulator_dev *rdev; - bool is_enabled; - u16 epod_id; - bool is_ramret; - bool exclude_from_power_state; - unsigned int operating_point; -}; +#include "dbx500-prcmu.h" static int db8500_regulator_enable(struct regulator_dev *rdev) { - struct db8500_regulator_info *info = rdev_get_drvdata(rdev); + struct dbx500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) return -EINVAL; @@ -93,16 +30,18 @@ static int db8500_regulator_enable(struct regulator_dev *rdev) dev_vdbg(rdev_get_dev(rdev), "regulator-%s-enable\n", info->desc.name); - info->is_enabled = true; - if (!info->exclude_from_power_state) - power_state_active_enable(); + if (!info->is_enabled) { + info->is_enabled = true; + if (!info->exclude_from_power_state) + power_state_active_enable(); + } return 0; } static int db8500_regulator_disable(struct regulator_dev *rdev) { - struct db8500_regulator_info *info = rdev_get_drvdata(rdev); + struct dbx500_regulator_info *info = rdev_get_drvdata(rdev); int ret = 0; if (info == NULL) @@ -111,16 +50,18 @@ static int db8500_regulator_disable(struct regulator_dev *rdev) dev_vdbg(rdev_get_dev(rdev), "regulator-%s-disable\n", info->desc.name); - info->is_enabled = false; - if (!info->exclude_from_power_state) - ret = power_state_active_disable(); + if (info->is_enabled) { + info->is_enabled = false; + if (!info->exclude_from_power_state) + ret = power_state_active_disable(); + } return ret; } static int db8500_regulator_is_enabled(struct regulator_dev *rdev) { - struct db8500_regulator_info *info = rdev_get_drvdata(rdev); + struct dbx500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) return -EINVAL; @@ -197,7 +138,7 @@ static int disable_epod(u16 epod_id, bool ramret) */ static int db8500_regulator_switch_enable(struct regulator_dev *rdev) { - struct db8500_regulator_info *info = rdev_get_drvdata(rdev); + struct dbx500_regulator_info *info = rdev_get_drvdata(rdev); int ret; if (info == NULL) @@ -221,7 +162,7 @@ out: static int db8500_regulator_switch_disable(struct regulator_dev *rdev) { - struct db8500_regulator_info *info = rdev_get_drvdata(rdev); + struct dbx500_regulator_info *info = rdev_get_drvdata(rdev); int ret; if (info == NULL) @@ -245,7 +186,7 @@ out: static int db8500_regulator_switch_is_enabled(struct regulator_dev *rdev) { - struct db8500_regulator_info *info = rdev_get_drvdata(rdev); + struct dbx500_regulator_info *info = rdev_get_drvdata(rdev); if (info == NULL) return -EINVAL; @@ -266,8 +207,8 @@ static struct regulator_ops db8500_regulator_switch_ops = { /* * Regulator information */ -static struct db8500_regulator_info -db8500_regulator_info[DB8500_NUM_REGULATORS] = { +static struct dbx500_regulator_info +dbx500_regulator_info[DB8500_NUM_REGULATORS] = { [DB8500_REGULATOR_VAPE] = { .desc = { .name = "db8500-vape", @@ -476,12 +417,12 @@ static int __devinit db8500_regulator_probe(struct platform_device *pdev) int i, err; /* register all regulators */ - for (i = 0; i < ARRAY_SIZE(db8500_regulator_info); i++) { - struct db8500_regulator_info *info; + for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) { + struct dbx500_regulator_info *info; struct regulator_init_data *init_data = &db8500_init_data[i]; /* assign per-regulator data */ - info = &db8500_regulator_info[i]; + info = &dbx500_regulator_info[i]; info->dev = &pdev->dev; /* register with the regulator framework */ @@ -494,7 +435,7 @@ static int __devinit db8500_regulator_probe(struct platform_device *pdev) /* if failing, unregister all earlier regulators */ while (--i >= 0) { - info = &db8500_regulator_info[i]; + info = &dbx500_regulator_info[i]; regulator_unregister(info->rdev); } return err; @@ -503,17 +444,22 @@ static int __devinit db8500_regulator_probe(struct platform_device *pdev) dev_dbg(rdev_get_dev(info->rdev), "regulator-%s-probed\n", info->desc.name); } + err = ux500_regulator_debug_init(pdev, + dbx500_regulator_info, + ARRAY_SIZE(dbx500_regulator_info)); - return 0; + return err; } static int __exit db8500_regulator_remove(struct platform_device *pdev) { int i; - for (i = 0; i < ARRAY_SIZE(db8500_regulator_info); i++) { - struct db8500_regulator_info *info; - info = &db8500_regulator_info[i]; + ux500_regulator_debug_exit(); + + for (i = 0; i < ARRAY_SIZE(dbx500_regulator_info); i++) { + struct dbx500_regulator_info *info; + info = &dbx500_regulator_info[i]; dev_vdbg(rdev_get_dev(info->rdev), "regulator-%s-remove\n", info->desc.name); diff --git a/drivers/regulator/dbx500-prcmu.c b/drivers/regulator/dbx500-prcmu.c new file mode 100644 index 00000000000..f2e5ecdc586 --- /dev/null +++ b/drivers/regulator/dbx500-prcmu.c @@ -0,0 +1,241 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * License Terms: GNU General Public License v2 + * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson + * Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson + * + * UX500 common part of Power domain regulators + */ + +#include <linux/kernel.h> +#include <linux/err.h> +#include <linux/regulator/driver.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/slab.h> + +#include "dbx500-prcmu.h" + +/* + * power state reference count + */ +static int power_state_active_cnt; /* will initialize to zero */ +static DEFINE_SPINLOCK(power_state_active_lock); + +int power_state_active_get(void) +{ + unsigned long flags; + int cnt; + + spin_lock_irqsave(&power_state_active_lock, flags); + cnt = power_state_active_cnt; + spin_unlock_irqrestore(&power_state_active_lock, flags); + + return cnt; +} + +void power_state_active_enable(void) +{ + unsigned long flags; + + spin_lock_irqsave(&power_state_active_lock, flags); + power_state_active_cnt++; + spin_unlock_irqrestore(&power_state_active_lock, flags); +} + +int power_state_active_disable(void) +{ + int ret = 0; + unsigned long flags; + + spin_lock_irqsave(&power_state_active_lock, flags); + if (power_state_active_cnt <= 0) { + pr_err("power state: unbalanced enable/disable calls\n"); + ret = -EINVAL; + goto out; + } + + power_state_active_cnt--; +out: + spin_unlock_irqrestore(&power_state_active_lock, flags); + return ret; +} + +#ifdef CONFIG_REGULATOR_DEBUG + +static struct ux500_regulator_debug { + struct dentry *dir; + struct dentry *status_file; + struct dentry *power_state_cnt_file; + struct dbx500_regulator_info *regulator_array; + int num_regulators; + u8 *state_before_suspend; + u8 *state_after_suspend; +} rdebug; + +void ux500_regulator_suspend_debug(void) +{ + int i; + for (i = 0; i < rdebug.num_regulators; i++) + rdebug.state_before_suspend[i] = + rdebug.regulator_array[i].is_enabled; +} + +void ux500_regulator_resume_debug(void) +{ + int i; + for (i = 0; i < rdebug.num_regulators; i++) + rdebug.state_after_suspend[i] = + rdebug.regulator_array[i].is_enabled; +} + +static int ux500_regulator_power_state_cnt_print(struct seq_file *s, void *p) +{ + struct device *dev = s->private; + int err; + + /* print power state count */ + err = seq_printf(s, "ux500-regulator power state count: %i\n", + power_state_active_get()); + if (err < 0) + dev_err(dev, "seq_printf overflow\n"); + + return 0; +} + +static int ux500_regulator_power_state_cnt_open(struct inode *inode, + struct file *file) +{ + return single_open(file, ux500_regulator_power_state_cnt_print, + inode->i_private); +} + +static const struct file_operations ux500_regulator_power_state_cnt_fops = { + .open = ux500_regulator_power_state_cnt_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +static int ux500_regulator_status_print(struct seq_file *s, void *p) +{ + struct device *dev = s->private; + int err; + int i; + + /* print dump header */ + err = seq_printf(s, "ux500-regulator status:\n"); + if (err < 0) + dev_err(dev, "seq_printf overflow\n"); + + err = seq_printf(s, "%31s : %8s : %8s\n", "current", + "before", "after"); + if (err < 0) + dev_err(dev, "seq_printf overflow\n"); + + for (i = 0; i < rdebug.num_regulators; i++) { + struct dbx500_regulator_info *info; + /* Access per-regulator data */ + info = &rdebug.regulator_array[i]; + + /* print status */ + err = seq_printf(s, "%20s : %8s : %8s : %8s\n", info->desc.name, + info->is_enabled ? "enabled" : "disabled", + rdebug.state_before_suspend[i] ? "enabled" : "disabled", + rdebug.state_after_suspend[i] ? "enabled" : "disabled"); + if (err < 0) + dev_err(dev, "seq_printf overflow\n"); + } + + return 0; +} + +static int ux500_regulator_status_open(struct inode *inode, struct file *file) +{ + return single_open(file, ux500_regulator_status_print, + inode->i_private); +} + +static const struct file_operations ux500_regulator_status_fops = { + .open = ux500_regulator_status_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +int __attribute__((weak)) dbx500_regulator_testcase( + struct dbx500_regulator_info *regulator_info, + int num_regulators) +{ + return 0; +} + +int __devinit +ux500_regulator_debug_init(struct platform_device *pdev, + struct dbx500_regulator_info *regulator_info, + int num_regulators) +{ + /* create directory */ + rdebug.dir = debugfs_create_dir("ux500-regulator", NULL); + if (!rdebug.dir) + goto exit_no_debugfs; + + /* create "status" file */ + rdebug.status_file = debugfs_create_file("status", + S_IRUGO, rdebug.dir, &pdev->dev, + &ux500_regulator_status_fops); + if (!rdebug.status_file) + goto exit_destroy_dir; + + /* create "power-state-count" file */ + rdebug.power_state_cnt_file = debugfs_create_file("power-state-count", + S_IRUGO, rdebug.dir, &pdev->dev, + &ux500_regulator_power_state_cnt_fops); + if (!rdebug.power_state_cnt_file) + goto exit_destroy_status; + + rdebug.regulator_array = regulator_info; + rdebug.num_regulators = num_regulators; + + rdebug.state_before_suspend = kzalloc(num_regulators, GFP_KERNEL); + if (!rdebug.state_before_suspend) { + dev_err(&pdev->dev, + "could not allocate memory for saving state\n"); + goto exit_destroy_power_state; + } + + rdebug.state_after_suspend = kzalloc(num_regulators, GFP_KERNEL); + if (!rdebug.state_after_suspend) { + dev_err(&pdev->dev, + "could not allocate memory for saving state\n"); + goto exit_free; + } + + dbx500_regulator_testcase(regulator_info, num_regulators); + return 0; + +exit_free: + kfree(rdebug.state_before_suspend); +exit_destroy_power_state: + debugfs_remove(rdebug.power_state_cnt_file); +exit_destroy_status: + debugfs_remove(rdebug.status_file); +exit_destroy_dir: + debugfs_remove(rdebug.dir); +exit_no_debugfs: + dev_err(&pdev->dev, "failed to create debugfs entries.\n"); + return -ENOMEM; +} + +int __devexit ux500_regulator_debug_exit(void) +{ + debugfs_remove_recursive(rdebug.dir); + kfree(rdebug.state_after_suspend); + kfree(rdebug.state_before_suspend); + + return 0; +} +#endif diff --git a/drivers/regulator/dbx500-prcmu.h b/drivers/regulator/dbx500-prcmu.h new file mode 100644 index 00000000000..e763883a44f --- /dev/null +++ b/drivers/regulator/dbx500-prcmu.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Bengt Jonsson <bengt.jonsson@stericsson.com> for ST-Ericsson, + * Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson + * + * License Terms: GNU General Public License v2 + * + */ + +#ifndef DBX500_REGULATOR_H +#define DBX500_REGULATOR_H + +#include <linux/platform_device.h> + +/** + * struct dbx500_regulator_info - dbx500 regulator information + * @dev: device pointer + * @desc: regulator description + * @rdev: regulator device pointer + * @is_enabled: status of the regulator + * @epod_id: id for EPOD (power domain) + * @is_ramret: RAM retention switch for EPOD (power domain) + * @operating_point: operating point (only for vape, to be removed) + * + */ +struct dbx500_regulator_info { + struct device *dev; + struct regulator_desc desc; + struct regulator_dev *rdev; + bool is_enabled; + u16 epod_id; + bool is_ramret; + bool exclude_from_power_state; + unsigned int operating_point; +}; + +void power_state_active_enable(void); +int power_state_active_disable(void); + + +#ifdef CONFIG_REGULATOR_DEBUG +int ux500_regulator_debug_init(struct platform_device *pdev, + struct dbx500_regulator_info *regulator_info, + int num_regulators); + +int ux500_regulator_debug_exit(void); +#else + +static inline int ux500_regulator_debug_init(struct platform_device *pdev, + struct dbx500_regulator_info *regulator_info, + int num_regulators) +{ + return 0; +} + +static inline int ux500_regulator_debug_exit(void) +{ + return 0; +} + +#endif +#endif |