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* [PATCH v3] Input: synaptics-rmi4: Support regulator supplies
@ 2016-06-11  5:25 Bjorn Andersson
       [not found] ` <1465622722-31714-1-git-send-email-bjorn.andersson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
  2016-06-25  0:40 ` Andrew Duggan
  0 siblings, 2 replies; 5+ messages in thread
From: Bjorn Andersson @ 2016-06-11  5:25 UTC (permalink / raw)
  To: Dmitry Torokhov, Rob Herring, Andrew Duggan, Christopher Heiny
  Cc: linux-input-u79uwXL29TY76Z2rM5mHXA,
	devicetree-u79uwXL29TY76Z2rM5mHXA,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA, Bjorn Andersson

From: Bjorn Andersson <bjorn.andersson-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>

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-/MT0OVThwyLZJqsBc5GL+g@public.gmane.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 .../devicetree/bindings/input/rmi4/rmi_i2c.txt     |  9 +++++
 drivers/input/rmi4/rmi_i2c.c                       | 41 ++++++++++++++++++++++
 2 files changed, 50 insertions(+)

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..71dc6cdde8ac 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 +309,7 @@ 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 +332,9 @@ 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 +344,12 @@ 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 +379,8 @@ 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 +390,12 @@ 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);
-- 
2.5.0

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^ permalink raw reply related	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2016-07-14  0:19 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-06-11  5:25 [PATCH v3] Input: synaptics-rmi4: Support regulator supplies Bjorn Andersson
     [not found] ` <1465622722-31714-1-git-send-email-bjorn.andersson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-06-14 22:01   ` Rob Herring
2016-06-25  0:40 ` Andrew Duggan
2016-07-13  4:33   ` Bjorn Andersson
2016-07-14  0:19   ` Dmitry Torokhov

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