diff options
Diffstat (limited to 'drivers/input/touchscreen/cyttsp_core.c')
| -rw-r--r-- | drivers/input/touchscreen/cyttsp_core.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c index 106dd4962785..1dbd849c9613 100644 --- a/drivers/input/touchscreen/cyttsp_core.c +++ b/drivers/input/touchscreen/cyttsp_core.c @@ -22,6 +22,7 @@ #include <linux/slab.h> #include <linux/property.h> #include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> #include "cyttsp_core.h" @@ -45,8 +46,15 @@ #define CY_MAXZ 255 #define CY_DELAY_DFLT 20 /* ms */ #define CY_DELAY_MAX 500 -#define CY_ACT_DIST_DFLT 0xF8 +/* Active distance in pixels for a gesture to be reported */ +#define CY_ACT_DIST_DFLT 0xF8 /* pixels */ #define CY_ACT_DIST_MASK 0x0F +/* Active Power state scanning/processing refresh interval */ +#define CY_ACT_INTRVL_DFLT 0x00 /* ms */ +/* Low Power state scanning/processing refresh interval */ +#define CY_LP_INTRVL_DFLT 0x0A /* ms */ +/* touch timeout for the Active power */ +#define CY_TCH_TMOUT_DFLT 0xFF /* ms */ #define CY_HNDSHK_BIT 0x80 /* device mode bits */ #define CY_OPERATE_MODE 0x00 @@ -608,6 +616,14 @@ static int cyttsp_parse_properties(struct cyttsp *ts) return 0; } +static void cyttsp_disable_regulators(void *_ts) +{ + struct cyttsp *ts = _ts; + + regulator_bulk_disable(ARRAY_SIZE(ts->regulators), + ts->regulators); +} + struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops, struct device *dev, int irq, size_t xfer_buf_size) { @@ -628,6 +644,32 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops, ts->bus_ops = bus_ops; ts->irq = irq; + /* + * VCPIN is the analog voltage supply + * VDD is the digital voltage supply + */ + ts->regulators[0].supply = "vcpin"; + ts->regulators[1].supply = "vdd"; + error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->regulators), + ts->regulators); + if (error) { + dev_err(dev, "Failed to get regulators: %d\n", error); + return ERR_PTR(error); + } + + error = regulator_bulk_enable(ARRAY_SIZE(ts->regulators), + ts->regulators); + if (error) { + dev_err(dev, "Cannot enable regulators: %d\n", error); + return ERR_PTR(error); + } + + error = devm_add_action_or_reset(dev, cyttsp_disable_regulators, ts); + if (error) { + dev_err(dev, "failed to install chip disable handler\n"); + return ERR_PTR(error); + } + ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(ts->reset_gpio)) { error = PTR_ERR(ts->reset_gpio); @@ -664,8 +706,7 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops, } error = devm_request_threaded_irq(dev, ts->irq, NULL, cyttsp_irq, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT | - IRQF_NO_AUTOEN, + IRQF_ONESHOT | IRQF_NO_AUTOEN, "cyttsp", ts); if (error) { dev_err(ts->dev, "failed to request IRQ %d, err: %d\n", |