diff options
Diffstat (limited to 'drivers/platform/x86/intel')
| -rw-r--r-- | drivers/platform/x86/intel/crystal_cove_charger.c | 26 | ||||
| -rw-r--r-- | drivers/platform/x86/intel/speed_select_if/isst_if_common.c | 97 |
2 files changed, 76 insertions, 47 deletions
diff --git a/drivers/platform/x86/intel/crystal_cove_charger.c b/drivers/platform/x86/intel/crystal_cove_charger.c index 0374bc742513..e4299cfa2205 100644 --- a/drivers/platform/x86/intel/crystal_cove_charger.c +++ b/drivers/platform/x86/intel/crystal_cove_charger.c @@ -17,6 +17,7 @@ #include <linux/regmap.h> #define CHGRIRQ_REG 0x0a +#define MCHGRIRQ_REG 0x17 struct crystal_cove_charger_data { struct mutex buslock; /* irq_bus_lock */ @@ -25,8 +26,8 @@ struct crystal_cove_charger_data { struct irq_domain *irq_domain; int irq; int charger_irq; - bool irq_enabled; - bool irq_is_enabled; + u8 mask; + u8 new_mask; }; static irqreturn_t crystal_cove_charger_irq(int irq, void *data) @@ -53,13 +54,9 @@ static void crystal_cove_charger_irq_bus_sync_unlock(struct irq_data *data) { struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data); - if (charger->irq_is_enabled != charger->irq_enabled) { - if (charger->irq_enabled) - enable_irq(charger->irq); - else - disable_irq(charger->irq); - - charger->irq_is_enabled = charger->irq_enabled; + if (charger->mask != charger->new_mask) { + regmap_write(charger->regmap, MCHGRIRQ_REG, charger->new_mask); + charger->mask = charger->new_mask; } mutex_unlock(&charger->buslock); @@ -69,14 +66,14 @@ static void crystal_cove_charger_irq_unmask(struct irq_data *data) { struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data); - charger->irq_enabled = true; + charger->new_mask &= ~BIT(data->hwirq); } static void crystal_cove_charger_irq_mask(struct irq_data *data) { struct crystal_cove_charger_data *charger = irq_data_get_irq_chip_data(data); - charger->irq_enabled = false; + charger->new_mask |= BIT(data->hwirq); } static void crystal_cove_charger_rm_irq_domain(void *data) @@ -130,10 +127,13 @@ static int crystal_cove_charger_probe(struct platform_device *pdev) irq_set_nested_thread(charger->charger_irq, true); irq_set_noprobe(charger->charger_irq); + /* Mask the single 2nd level IRQ before enabling the 1st level IRQ */ + charger->mask = charger->new_mask = BIT(0); + regmap_write(charger->regmap, MCHGRIRQ_REG, charger->mask); + ret = devm_request_threaded_irq(&pdev->dev, charger->irq, NULL, crystal_cove_charger_irq, - IRQF_ONESHOT | IRQF_NO_AUTOEN, - KBUILD_MODNAME, charger); + IRQF_ONESHOT, KBUILD_MODNAME, charger); if (ret) return dev_err_probe(&pdev->dev, ret, "requesting irq\n"); diff --git a/drivers/platform/x86/intel/speed_select_if/isst_if_common.c b/drivers/platform/x86/intel/speed_select_if/isst_if_common.c index c9a85eb2e860..e8424e70d81d 100644 --- a/drivers/platform/x86/intel/speed_select_if/isst_if_common.c +++ b/drivers/platform/x86/intel/speed_select_if/isst_if_common.c @@ -596,7 +596,10 @@ static long isst_if_def_ioctl(struct file *file, unsigned int cmd, return ret; } -static DEFINE_MUTEX(punit_misc_dev_lock); +/* Lock to prevent module registration when already opened by user space */ +static DEFINE_MUTEX(punit_misc_dev_open_lock); +/* Lock to allow one share misc device for all ISST interace */ +static DEFINE_MUTEX(punit_misc_dev_reg_lock); static int misc_usage_count; static int misc_device_ret; static int misc_device_open; @@ -606,7 +609,7 @@ static int isst_if_open(struct inode *inode, struct file *file) int i, ret = 0; /* Fail open, if a module is going away */ - mutex_lock(&punit_misc_dev_lock); + mutex_lock(&punit_misc_dev_open_lock); for (i = 0; i < ISST_IF_DEV_MAX; ++i) { struct isst_if_cmd_cb *cb = &punit_callbacks[i]; @@ -628,7 +631,7 @@ static int isst_if_open(struct inode *inode, struct file *file) } else { misc_device_open++; } - mutex_unlock(&punit_misc_dev_lock); + mutex_unlock(&punit_misc_dev_open_lock); return ret; } @@ -637,7 +640,7 @@ static int isst_if_relase(struct inode *inode, struct file *f) { int i; - mutex_lock(&punit_misc_dev_lock); + mutex_lock(&punit_misc_dev_open_lock); misc_device_open--; for (i = 0; i < ISST_IF_DEV_MAX; ++i) { struct isst_if_cmd_cb *cb = &punit_callbacks[i]; @@ -645,7 +648,7 @@ static int isst_if_relase(struct inode *inode, struct file *f) if (cb->registered) module_put(cb->owner); } - mutex_unlock(&punit_misc_dev_lock); + mutex_unlock(&punit_misc_dev_open_lock); return 0; } @@ -662,6 +665,43 @@ static struct miscdevice isst_if_char_driver = { .fops = &isst_if_char_driver_ops, }; +static int isst_misc_reg(void) +{ + mutex_lock(&punit_misc_dev_reg_lock); + if (misc_device_ret) + goto unlock_exit; + + if (!misc_usage_count) { + misc_device_ret = isst_if_cpu_info_init(); + if (misc_device_ret) + goto unlock_exit; + + misc_device_ret = misc_register(&isst_if_char_driver); + if (misc_device_ret) { + isst_if_cpu_info_exit(); + goto unlock_exit; + } + } + misc_usage_count++; + +unlock_exit: + mutex_unlock(&punit_misc_dev_reg_lock); + + return misc_device_ret; +} + +static void isst_misc_unreg(void) +{ + mutex_lock(&punit_misc_dev_reg_lock); + if (misc_usage_count) + misc_usage_count--; + if (!misc_usage_count && !misc_device_ret) { + misc_deregister(&isst_if_char_driver); + isst_if_cpu_info_exit(); + } + mutex_unlock(&punit_misc_dev_reg_lock); +} + /** * isst_if_cdev_register() - Register callback for IOCTL * @device_type: The device type this callback handling. @@ -679,38 +719,31 @@ static struct miscdevice isst_if_char_driver = { */ int isst_if_cdev_register(int device_type, struct isst_if_cmd_cb *cb) { - if (misc_device_ret) - return misc_device_ret; + int ret; if (device_type >= ISST_IF_DEV_MAX) return -EINVAL; - mutex_lock(&punit_misc_dev_lock); + mutex_lock(&punit_misc_dev_open_lock); + /* Device is already open, we don't want to add new callbacks */ if (misc_device_open) { - mutex_unlock(&punit_misc_dev_lock); + mutex_unlock(&punit_misc_dev_open_lock); return -EAGAIN; } - if (!misc_usage_count) { - int ret; - - misc_device_ret = misc_register(&isst_if_char_driver); - if (misc_device_ret) - goto unlock_exit; - - ret = isst_if_cpu_info_init(); - if (ret) { - misc_deregister(&isst_if_char_driver); - misc_device_ret = ret; - goto unlock_exit; - } - } memcpy(&punit_callbacks[device_type], cb, sizeof(*cb)); punit_callbacks[device_type].registered = 1; - misc_usage_count++; -unlock_exit: - mutex_unlock(&punit_misc_dev_lock); + mutex_unlock(&punit_misc_dev_open_lock); - return misc_device_ret; + ret = isst_misc_reg(); + if (ret) { + /* + * No need of mutex as the misc device register failed + * as no one can open device yet. Hence no contention. + */ + punit_callbacks[device_type].registered = 0; + return ret; + } + return 0; } EXPORT_SYMBOL_GPL(isst_if_cdev_register); @@ -725,16 +758,12 @@ EXPORT_SYMBOL_GPL(isst_if_cdev_register); */ void isst_if_cdev_unregister(int device_type) { - mutex_lock(&punit_misc_dev_lock); - misc_usage_count--; + isst_misc_unreg(); + mutex_lock(&punit_misc_dev_open_lock); punit_callbacks[device_type].registered = 0; if (device_type == ISST_IF_DEV_MBOX) isst_delete_hash(); - if (!misc_usage_count && !misc_device_ret) { - misc_deregister(&isst_if_char_driver); - isst_if_cpu_info_exit(); - } - mutex_unlock(&punit_misc_dev_lock); + mutex_unlock(&punit_misc_dev_open_lock); } EXPORT_SYMBOL_GPL(isst_if_cdev_unregister); |