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Message-ID: <1454927231-17662-2-git-send-email-akarwar@marvell.com>
Date: Mon, 8 Feb 2016 02:27:11 -0800
From: Amitkumar Karwar <akarwar@...vell.com>
To: <linux-bluetooth@...r.kernel.org>
CC: Nishant Sarmukadam <nishants@...vell.com>, <wnhuang@...omium.com>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Xinming Hu <huxm@...vell.com>,
Amitkumar Karwar <akarwar@...vell.com>
Subject: [PATCH v3 2/2] bluetooth: btmrvl: parse host wakeup configuration from device tree
From: Xinming Hu <huxm@...vell.com>
This patch implements a framework for board specific wakeup.
driver parse irq/gpio number from device tree, corresponding
resources will be allocated, and used for host suspend/resume.
Device tree binding file is also updated in the patch.
Signed-off-by: Xinming Hu <huxm@...vell.com>
Signed-off-by: Amitkumar Karwar <akarwar@...vell.com>
---
v2: Fixed build error reported by kbuild test robot
drivers/bluetooth/btmrvl_platform.c:141:22: error:
'btmrvl_plt_pm_ops' undeclared here (not in a function)
---
Documentation/devicetree/bindings/btmrvl.txt | 17 ++++-
drivers/bluetooth/btmrvl_platform.c | 95 ++++++++++++++++++++++++++++
2 files changed, 110 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/btmrvl.txt b/Documentation/devicetree/bindings/btmrvl.txt
index 25b804b..887c7ff 100644
--- a/Documentation/devicetree/bindings/btmrvl.txt
+++ b/Documentation/devicetree/bindings/btmrvl.txt
@@ -12,11 +12,19 @@ Optional properties:
- btmrvl,gpio-gap : gpio and gap (in msecs) combination to be
configured.
+ - interrupt-parent: phandle of the parent interrupt controller
+ - interrupts : interrupt number to the cpu
+ - gpios: specify GPIO respectively. gpio here is board specific pin.
+ while above gpio-gap represents the device side pin used to
+ wakeup host.
+ - pinctrl-names : a pinctrl state named "default" must be defined
+ - pinctrl-0 : pin control group to be used for this controller
Example:
-GPIO pin 13 and gap 100ms are configured for host wakeup, calibration
-data is also available in below example.
+GPIO pin 119 and gap 100ms are configured for host wakeup,
+pin 13 is configured so that firmware can wakeup host using this device side
+pin, calibration data is also available in below example.
btmrvl {
compatible = "marvell,btmrvl";
@@ -26,4 +34,9 @@ btmrvl {
0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0xf0 0x00>;
btmrvl,gpio-gap = <0x0d64>;
+ interrupt-parent = <&pio>;
+ interrupts = <119 IRQ_TYPE_LEVEL_LOW>;
+ gpios = <&pio 119 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&wake_pins>;
};
diff --git a/drivers/bluetooth/btmrvl_platform.c b/drivers/bluetooth/btmrvl_platform.c
index 4e91d27..6f64922 100644
--- a/drivers/bluetooth/btmrvl_platform.c
+++ b/drivers/bluetooth/btmrvl_platform.c
@@ -19,9 +19,63 @@
struct platform_device *btmrvl_plt_dev;
+struct btmrvl_wake_dev {
+ struct device *dev;
+ int irq_bt;
+ bool wake_by_bt;
+};
+
+static irqreturn_t btmrvl_wake_irq_bt(int irq, void *priv)
+{
+ struct btmrvl_wake_dev *ctx = priv;
+
+ if (ctx->irq_bt >= 0) {
+ ctx->wake_by_bt = true;
+ disable_irq_nosync(ctx->irq_bt);
+ }
+
+ return IRQ_HANDLED;
+}
+
static int btmrvl_plt_probe(struct platform_device *pdev)
{
+ int ret;
+ struct btmrvl_wake_dev *ctx;
+ int gpio;
+
btmrvl_plt_dev = pdev;
+
+ ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = &pdev->dev;
+ ctx->irq_bt = platform_get_irq(pdev, 0);
+ if (ctx->irq_bt < 0)
+ dev_err(&pdev->dev, "Failed to get irq_bt\n");
+
+ gpio = of_get_gpio(pdev->dev.of_node, 0);
+ if (gpio_is_valid(gpio))
+ gpio_direction_input(gpio);
+ else
+ dev_err(&pdev->dev, "gpio bt is invalid\n");
+
+ if (ctx->irq_bt >= 0) {
+ ret = devm_request_irq(&pdev->dev, ctx->irq_bt,
+ btmrvl_wake_irq_bt,
+ IRQF_TRIGGER_LOW,
+ "bt_wake", ctx);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to request irq_bt %d (%d)\n",
+ ctx->irq_bt, ret);
+ return -EINVAL;
+ }
+ disable_irq(ctx->irq_bt);
+ }
+
+ platform_set_drvdata(pdev, ctx);
+
return 0;
}
@@ -31,6 +85,44 @@ static int btmrvl_plt_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int btmrvl_plt_suspend(struct device *dev)
+{
+ struct btmrvl_wake_dev *ctx = dev_get_drvdata(dev);
+ int ret;
+
+ if (ctx->irq_bt >= 0) {
+ ctx->wake_by_bt = false;
+ enable_irq(ctx->irq_bt);
+ ret = enable_irq_wake(ctx->irq_bt);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int btmrvl_plt_resume(struct device *dev)
+{
+ struct btmrvl_wake_dev *ctx = dev_get_drvdata(dev);
+ int ret;
+
+ if (ctx->irq_bt >= 0) {
+ ret = disable_irq_wake(ctx->irq_bt);
+ if (!ctx->wake_by_bt)
+ disable_irq(ctx->irq_bt);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops btmrvl_plt_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(btmrvl_plt_suspend, btmrvl_plt_resume)
+};
+#endif /* CONFIG_PM_SLEEP */
+
static const struct of_device_id btmrvl_dt_match[] = {
{
.compatible = "marvell,btmrvl",
@@ -46,6 +138,9 @@ static struct platform_driver btmrvl_platform_driver = {
.driver = {
.name = "btmrvl_plt",
.of_match_table = btmrvl_dt_match,
+#ifdef CONFIG_PM_SLEEP
+ .pm = &btmrvl_plt_pm_ops,
+#endif
}
};
--
1.8.1.4
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