diff options
Diffstat (limited to 'drivers/mfd/tps65217.c')
| -rw-r--r-- | drivers/mfd/tps65217.c | 205 |
1 files changed, 197 insertions, 8 deletions
diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c index 049a6fcac651..9a4d8684dd32 100644 --- a/drivers/mfd/tps65217.c +++ b/drivers/mfd/tps65217.c @@ -15,22 +15,103 @@ * GNU General Public License for more details. */ -#include <linux/kernel.h> #include <linux/device.h> -#include <linux/module.h> -#include <linux/platform_device.h> +#include <linux/err.h> #include <linux/init.h> +#include <linux/interrupt.h> #include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/regmap.h> -#include <linux/err.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> #include <linux/mfd/core.h> #include <linux/mfd/tps65217.h> -static const struct mfd_cell tps65217s[] = { +static struct resource charger_resources[] = { + DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"), + DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"), +}; + +static struct resource pb_resources[] = { + DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"), +}; + +struct tps65217_irq { + int mask; + int interrupt; +}; + +static const struct tps65217_irq tps65217_irqs[] = { + [TPS65217_IRQ_PB] = { + .mask = TPS65217_INT_PBM, + .interrupt = TPS65217_INT_PBI, + }, + [TPS65217_IRQ_AC] = { + .mask = TPS65217_INT_ACM, + .interrupt = TPS65217_INT_ACI, + }, + [TPS65217_IRQ_USB] = { + .mask = TPS65217_INT_USBM, + .interrupt = TPS65217_INT_USBI, + }, +}; + +static void tps65217_irq_lock(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + + mutex_lock(&tps->irq_lock); +} + +static void tps65217_irq_sync_unlock(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + int ret; + + ret = tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask, + TPS65217_PROTECT_NONE); + if (ret != 0) + dev_err(tps->dev, "Failed to sync IRQ masks\n"); + + mutex_unlock(&tps->irq_lock); +} + +static inline const struct tps65217_irq * +irq_to_tps65217_irq(struct tps65217 *tps, struct irq_data *data) +{ + return &tps65217_irqs[data->hwirq]; +} + +static void tps65217_irq_enable(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data); + + tps->irq_mask &= ~irq_data->mask; +} + +static void tps65217_irq_disable(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data); + + tps->irq_mask |= irq_data->mask; +} + +static struct irq_chip tps65217_irq_chip = { + .irq_bus_lock = tps65217_irq_lock, + .irq_bus_sync_unlock = tps65217_irq_sync_unlock, + .irq_enable = tps65217_irq_enable, + .irq_disable = tps65217_irq_disable, +}; + +static struct mfd_cell tps65217s[] = { { .name = "tps65217-pmic", .of_compatible = "ti,tps65217-pmic", @@ -41,10 +122,96 @@ static const struct mfd_cell tps65217s[] = { }, { .name = "tps65217-charger", + .num_resources = ARRAY_SIZE(charger_resources), + .resources = charger_resources, .of_compatible = "ti,tps65217-charger", }, + { + .name = "tps65217-pwrbutton", + .num_resources = ARRAY_SIZE(pb_resources), + .resources = pb_resources, + .of_compatible = "ti,tps65217-pwrbutton", + }, +}; + +static irqreturn_t tps65217_irq_thread(int irq, void *data) +{ + struct tps65217 *tps = data; + unsigned int status; + bool handled = false; + int i; + int ret; + + ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status); + if (ret < 0) { + dev_err(tps->dev, "Failed to read IRQ status: %d\n", + ret); + return IRQ_NONE; + } + + for (i = 0; i < ARRAY_SIZE(tps65217_irqs); i++) { + if (status & tps65217_irqs[i].interrupt) { + handle_nested_irq(irq_find_mapping(tps->irq_domain, i)); + handled = true; + } + } + + if (handled) + return IRQ_HANDLED; + + return IRQ_NONE; +} + +static int tps65217_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct tps65217 *tps = h->host_data; + + irq_set_chip_data(virq, tps); + irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq); + irq_set_nested_thread(virq, 1); + irq_set_parent(virq, tps->irq); + irq_set_noprobe(virq); + + return 0; +} + +static const struct irq_domain_ops tps65217_irq_domain_ops = { + .map = tps65217_irq_map, }; +static int tps65217_irq_init(struct tps65217 *tps, int irq) +{ + int ret; + + mutex_init(&tps->irq_lock); + tps->irq = irq; + + /* Mask all interrupt sources */ + tps->irq_mask = (TPS65217_INT_RESERVEDM | TPS65217_INT_PBM + | TPS65217_INT_ACM | TPS65217_INT_USBM); + tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask, + TPS65217_PROTECT_NONE); + + tps->irq_domain = irq_domain_add_linear(tps->dev->of_node, + TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps); + if (!tps->irq_domain) { + dev_err(tps->dev, "Could not create IRQ domain\n"); + return -ENOMEM; + } + + ret = devm_request_threaded_irq(tps->dev, irq, NULL, + tps65217_irq_thread, IRQF_ONESHOT, + "tps65217-irq", tps); + if (ret) { + dev_err(tps->dev, "Failed to request IRQ %d: %d\n", + irq, ret); + return ret; + } + + return 0; +} + /** * tps65217_reg_read: Read a single tps65217 register. * @@ -149,11 +316,22 @@ int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg, } EXPORT_SYMBOL_GPL(tps65217_clear_bits); +static bool tps65217_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TPS65217_REG_INT: + return true; + default: + return false; + } +} + static const struct regmap_config tps65217_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TPS65217_REG_MAX, + .volatile_reg = tps65217_volatile_reg, }; static const struct of_device_id tps65217_of_match[] = { @@ -205,8 +383,19 @@ static int tps65217_probe(struct i2c_client *client, return ret; } + if (client->irq) { + tps65217_irq_init(tps, client->irq); + } else { + int i; + + /* Don't tell children about IRQ resources which won't fire */ + for (i = 0; i < ARRAY_SIZE(tps65217s); i++) + tps65217s[i].num_resources = 0; + } + ret = devm_mfd_add_devices(tps->dev, -1, tps65217s, - ARRAY_SIZE(tps65217s), NULL, 0, NULL); + ARRAY_SIZE(tps65217s), NULL, 0, + tps->irq_domain); if (ret < 0) { dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret); return ret; |