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author | Bjorn Andersson <bjorn.andersson@sonymobile.com> | 2016-07-14 02:15:38 +0200 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-07-14 02:27:24 +0200 |
commit | 946c8432aab03feba14104aebcb3037636297eee (patch) | |
tree | 9290d13c8c586fc867681f71fd287e5c6587dc41 | |
parent | Input: raydium_i2c_ts - check CRC of incoming packets (diff) | |
download | linux-946c8432aab03feba14104aebcb3037636297eee.tar.xz linux-946c8432aab03feba14104aebcb3037636297eee.zip |
Input: synaptics-rmi4 - support regulator supplies
Support the two supplies - vdd and vio - to make it possible to control
power to the Synaptics chip.
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
-rw-r--r-- | Documentation/devicetree/bindings/input/rmi4/rmi_i2c.txt | 9 | ||||
-rw-r--r-- | drivers/input/rmi4/rmi_i2c.c | 46 |
2 files changed, 55 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/rmi4/rmi_i2c.txt b/Documentation/devicetree/bindings/input/rmi4/rmi_i2c.txt index 95fa715c6046..ec908b91fd90 100644 --- a/Documentation/devicetree/bindings/input/rmi4/rmi_i2c.txt +++ b/Documentation/devicetree/bindings/input/rmi4/rmi_i2c.txt @@ -22,6 +22,15 @@ See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt - syna,reset-delay-ms: The number of milliseconds to wait after resetting the device. +- syna,startup-delay-ms: The number of milliseconds to wait after powering on + the device. + +- vdd-supply: VDD power supply. +See ../regulator/regulator.txt + +- vio-supply: VIO power supply +See ../regulator/regulator.txt + Function Parameters: Parameters specific to RMI functions are contained in child nodes of the rmi device node. Documentation for the parameters of each function can be found in: diff --git a/drivers/input/rmi4/rmi_i2c.c b/drivers/input/rmi4/rmi_i2c.c index a96a326b53bd..6f2e0e4f0296 100644 --- a/drivers/input/rmi4/rmi_i2c.c +++ b/drivers/input/rmi4/rmi_i2c.c @@ -11,6 +11,8 @@ #include <linux/rmi.h> #include <linux/irq.h> #include <linux/of.h> +#include <linux/delay.h> +#include <linux/regulator/consumer.h> #include "rmi_driver.h" #define BUFFER_SIZE_INCREMENT 32 @@ -37,6 +39,9 @@ struct rmi_i2c_xport { u8 *tx_buf; size_t tx_buf_size; + + struct regulator_bulk_data supplies[2]; + u32 startup_delay; }; #define RMI_PAGE_SELECT_REGISTER 0xff @@ -246,6 +251,24 @@ static int rmi_i2c_probe(struct i2c_client *client, return -ENODEV; } + rmi_i2c->supplies[0].supply = "vdd"; + rmi_i2c->supplies[1].supply = "vio"; + retval = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); + if (retval < 0) + return retval; + + retval = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); + if (retval < 0) + return retval; + + of_property_read_u32(client->dev.of_node, "syna,startup-delay-ms", + &rmi_i2c->startup_delay); + + msleep(rmi_i2c->startup_delay); + rmi_i2c->client = client; mutex_init(&rmi_i2c->page_mutex); @@ -286,6 +309,8 @@ static int rmi_i2c_remove(struct i2c_client *client) struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client); rmi_unregister_transport_device(&rmi_i2c->xport); + regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); return 0; } @@ -308,6 +333,10 @@ static int rmi_i2c_suspend(struct device *dev) dev_warn(dev, "Failed to enable irq for wake: %d\n", ret); } + + regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); + return ret; } @@ -317,6 +346,13 @@ static int rmi_i2c_resume(struct device *dev) struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client); int ret; + ret = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); + if (ret) + return ret; + + msleep(rmi_i2c->startup_delay); + enable_irq(rmi_i2c->irq); if (device_may_wakeup(&client->dev)) { ret = disable_irq_wake(rmi_i2c->irq); @@ -346,6 +382,9 @@ static int rmi_i2c_runtime_suspend(struct device *dev) disable_irq(rmi_i2c->irq); + regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); + return 0; } @@ -355,6 +394,13 @@ static int rmi_i2c_runtime_resume(struct device *dev) struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client); int ret; + ret = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies), + rmi_i2c->supplies); + if (ret) + return ret; + + msleep(rmi_i2c->startup_delay); + enable_irq(rmi_i2c->irq); ret = rmi_driver_resume(rmi_i2c->xport.rmi_dev); |