diff options
Diffstat (limited to 'drivers/extcon/extcon-max14577.c')
| -rw-r--r-- | drivers/extcon/extcon-max14577.c | 199 |
1 files changed, 135 insertions, 64 deletions
diff --git a/drivers/extcon/extcon-max14577.c b/drivers/extcon/extcon-max14577.c index 3846941801b..d49e891b567 100644 --- a/drivers/extcon/extcon-max14577.c +++ b/drivers/extcon/extcon-max14577.c @@ -1,8 +1,9 @@ /* - * extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC + * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC * - * Copyright (C) 2013 Samsung Electrnoics + * Copyright (C) 2013,2014 Samsung Electrnoics * Chanwoo Choi <cw00.choi@samsung.com> + * Krzysztof Kozlowski <k.kozlowski@samsung.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -24,7 +25,6 @@ #include <linux/mfd/max14577-private.h> #include <linux/extcon.h> -#define DEV_NAME "max14577-muic" #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ enum max14577_muic_adc_debounce_time { @@ -40,6 +40,42 @@ enum max14577_muic_status { MAX14577_MUIC_STATUS_END, }; +/** + * struct max14577_muic_irq + * @irq: the index of irq list of MUIC device. + * @name: the name of irq. + * @virq: the virtual irq to use irq domain + */ +struct max14577_muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +static struct max14577_muic_irq max14577_muic_irqs[] = { + { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, + { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, + { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, + { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, + { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, + { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, + { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, + { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, +}; + +static struct max14577_muic_irq max77836_muic_irqs[] = { + { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, + { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, + { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, + { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, + { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, + { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, + { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, + { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, + { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, + { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, +}; + struct max14577_muic_info { struct device *dev; struct max14577 *max14577; @@ -48,6 +84,8 @@ struct max14577_muic_info { int prev_chg_type; u8 status[MAX14577_MUIC_STATUS_END]; + struct max14577_muic_irq *muic_irqs; + unsigned int muic_irqs_num; bool irq_adc; bool irq_chg; struct work_struct irq_work; @@ -74,29 +112,6 @@ enum max14577_muic_cable_group { MAX14577_CABLE_GROUP_CHG, }; -/** - * struct max14577_muic_irq - * @irq: the index of irq list of MUIC device. - * @name: the name of irq. - * @virq: the virtual irq to use irq domain - */ -struct max14577_muic_irq { - unsigned int irq; - const char *name; - unsigned int virq; -}; - -static struct max14577_muic_irq muic_irqs[] = { - { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, - { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, - { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, - { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, - { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, - { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, - { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, - { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, -}; - /* Define supported accessory type */ enum max14577_muic_acc_type { MAX14577_MUIC_ADC_GROUND = 0x0, @@ -528,21 +543,12 @@ static void max14577_muic_irq_work(struct work_struct *work) return; } -static irqreturn_t max14577_muic_irq_handler(int irq, void *data) +/* + * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. + * Returns 0 if irq_type does not match registered IRQ for this device type. + */ +static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type) { - struct max14577_muic_info *info = data; - int i, irq_type = -1; - - /* - * We may be called multiple times for different nested IRQ-s. - * Including changes in INT1_ADC and INT2_CGHTYP at once. - * However we only need to know whether it was ADC, charger - * or both interrupts so decode IRQ and turn on proper flags. - */ - for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) - if (irq == muic_irqs[i].virq) - irq_type = muic_irqs[i].irq; - switch (irq_type) { case MAX14577_IRQ_INT1_ADC: case MAX14577_IRQ_INT1_ADCLOW: @@ -550,7 +556,7 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data) /* Handle all of accessory except for type of charger accessory */ info->irq_adc = true; - break; + return 1; case MAX14577_IRQ_INT2_CHGTYP: case MAX14577_IRQ_INT2_CHGDETRUN: case MAX14577_IRQ_INT2_DCDTMR: @@ -558,8 +564,62 @@ static irqreturn_t max14577_muic_irq_handler(int irq, void *data) case MAX14577_IRQ_INT2_VBVOLT: /* Handle charger accessory */ info->irq_chg = true; + return 1; + default: + return 0; + } +} + +/* + * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. + * Returns 0 if irq_type does not match registered IRQ for this device type. + */ +static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type) +{ + /* First check common max14577 interrupts */ + if (max14577_parse_irq(info, irq_type)) + return 1; + + switch (irq_type) { + case MAX77836_IRQ_INT1_ADC1K: + info->irq_adc = true; + return 1; + case MAX77836_IRQ_INT2_VIDRM: + /* Handle charger accessory */ + info->irq_chg = true; + return 1; + default: + return 0; + } +} + +static irqreturn_t max14577_muic_irq_handler(int irq, void *data) +{ + struct max14577_muic_info *info = data; + int i, irq_type = -1; + bool irq_parsed; + + /* + * We may be called multiple times for different nested IRQ-s. + * Including changes in INT1_ADC and INT2_CGHTYP at once. + * However we only need to know whether it was ADC, charger + * or both interrupts so decode IRQ and turn on proper flags. + */ + for (i = 0; i < info->muic_irqs_num; i++) + if (irq == info->muic_irqs[i].virq) + irq_type = info->muic_irqs[i].irq; + + switch (info->max14577->dev_type) { + case MAXIM_DEVICE_TYPE_MAX77836: + irq_parsed = max77836_parse_irq(info, irq_type); break; + case MAXIM_DEVICE_TYPE_MAX14577: default: + irq_parsed = max14577_parse_irq(info, irq_type); + break; + } + + if (!irq_parsed) { dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", irq_type); return IRQ_HANDLED; @@ -644,13 +704,24 @@ static int max14577_muic_probe(struct platform_device *pdev) INIT_WORK(&info->irq_work, max14577_muic_irq_work); + switch (max14577->dev_type) { + case MAXIM_DEVICE_TYPE_MAX77836: + info->muic_irqs = max77836_muic_irqs; + info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs); + break; + case MAXIM_DEVICE_TYPE_MAX14577: + default: + info->muic_irqs = max14577_muic_irqs; + info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs); + } + /* Support irq domain for max14577 MUIC device */ - for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { - struct max14577_muic_irq *muic_irq = &muic_irqs[i]; + for (i = 0; i < info->muic_irqs_num; i++) { + struct max14577_muic_irq *muic_irq = &info->muic_irqs[i]; unsigned int virq = 0; virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); - if (!virq) + if (virq <= 0) return -EINVAL; muic_irq->virq = virq; @@ -668,14 +739,16 @@ static int max14577_muic_probe(struct platform_device *pdev) } /* Initialize extcon device */ - info->edev = devm_kzalloc(&pdev->dev, sizeof(*info->edev), GFP_KERNEL); - if (!info->edev) { + info->edev = devm_extcon_dev_allocate(&pdev->dev, + max14577_extcon_cable); + if (IS_ERR(info->edev)) { dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); return -ENOMEM; } - info->edev->name = DEV_NAME; - info->edev->supported_cable = max14577_extcon_cable; - ret = extcon_dev_register(info->edev); + + info->edev->name = dev_name(&pdev->dev); + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); if (ret) { dev_err(&pdev->dev, "failed to register extcon device\n"); return ret; @@ -694,7 +767,7 @@ static int max14577_muic_probe(struct platform_device *pdev) MAX14577_REG_DEVICEID, &id); if (ret < 0) { dev_err(&pdev->dev, "failed to read revision number\n"); - goto err_extcon; + return ret; } dev_info(info->dev, "device ID : 0x%x\n", id); @@ -710,19 +783,10 @@ static int max14577_muic_probe(struct platform_device *pdev) * driver should notify cable state to upper layer. */ INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); - ret = queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, delay_jiffies); - if (ret < 0) { - dev_err(&pdev->dev, - "failed to schedule delayed work for cable detect\n"); - goto err_extcon; - } return ret; - -err_extcon: - extcon_dev_unregister(info->edev); - return ret; } static int max14577_muic_remove(struct platform_device *pdev) @@ -730,23 +794,30 @@ static int max14577_muic_remove(struct platform_device *pdev) struct max14577_muic_info *info = platform_get_drvdata(pdev); cancel_work_sync(&info->irq_work); - extcon_dev_unregister(info->edev); return 0; } +static const struct platform_device_id max14577_muic_id[] = { + { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, }, + { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, }, + { } +}; +MODULE_DEVICE_TABLE(platform, max14577_muic_id); + static struct platform_driver max14577_muic_driver = { .driver = { - .name = DEV_NAME, + .name = "max14577-muic", .owner = THIS_MODULE, }, .probe = max14577_muic_probe, .remove = max14577_muic_remove, + .id_table = max14577_muic_id, }; module_platform_driver(max14577_muic_driver); -MODULE_DESCRIPTION("MAXIM 14577 Extcon driver"); -MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver"); +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:extcon-max14577"); |