Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 659 insertions, 0 deletions

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
new file mode 100644
index 000000000..894d5afaf
--- /dev/null
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -0,0 +1,659 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Rockchip ISP1 Driver - Base driver
+ *
+ * Copyright (C) 2019 Collabora, Ltd.
+ *
+ * Based on Rockchip ISP1 driver by Rockchip Electronics Co., Ltd.
+ * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pm_runtime.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-mc.h>
+
+#include "rkisp1-common.h"
+#include "rkisp1-csi.h"
+
+/*
+ * ISP Details
+ * -----------
+ *
+ * ISP Comprises with:
+ *	MIPI serial camera interface
+ *	Image Signal Processing
+ *	Many Image Enhancement Blocks
+ *	Crop
+ *	Resizer
+ *	RBG display ready image
+ *	Image Rotation
+ *
+ * ISP Block Diagram
+ * -----------------
+ *                                                             rkisp1-resizer.c          rkisp1-capture.c
+ *                                                          |====================|  |=======================|
+ *                                rkisp1-isp.c                              Main Picture Path
+ *                        |==========================|      |===============================================|
+ *                        +-----------+  +--+--+--+--+      +--------+  +--------+              +-----------+
+ *                        |           |  |  |  |  |  |      |        |  |        |              |           |
+ * +--------+    |\       |           |  |  |  |  |  |   -->|  Crop  |->|  RSZ   |------------->|           |
+ * |  MIPI  |--->|  \     |           |  |  |  |  |  |   |  |        |  |        |              |           |
+ * +--------+    |   |    |           |  |IE|IE|IE|IE|   |  +--------+  +--------+              |  Memory   |
+ *               |MUX|--->|    ISP    |->|0 |1 |2 |3 |---+                                      | Interface |
+ * +--------+    |   |    |           |  |  |  |  |  |   |  +--------+  +--------+  +--------+  |           |
+ * |Parallel|--->|  /     |           |  |  |  |  |  |   |  |        |  |        |  |        |  |           |
+ * +--------+    |/       |           |  |  |  |  |  |   -->|  Crop  |->|  RSZ   |->|  RGB   |->|           |
+ *                        |           |  |  |  |  |  |      |        |  |        |  | Rotate |  |           |
+ *                        +-----------+  +--+--+--+--+      +--------+  +--------+  +--------+  +-----------+
+ *                                               ^
+ * +--------+                                    |          |===============================================|
+ * |  DMA   |------------------------------------+                          Self Picture Path
+ * +--------+
+ *
+ *         rkisp1-stats.c        rkisp1-params.c
+ *       |===============|      |===============|
+ *       +---------------+      +---------------+
+ *       |               |      |               |
+ *       |      ISP      |      |      ISP      |
+ *       |               |      |               |
+ *       +---------------+      +---------------+
+ *
+ *
+ * Media Topology
+ * --------------
+ *
+ *          +----------+       +----------+
+ *          | Sensor 1 |       | Sensor X |
+ *          ------------  ...  ------------
+ *          |    0     |       |    0     |
+ *          +----------+       +----------+
+ *               |                  |
+ *                \----\       /----/
+ *                     |       |
+ *                     v       v
+ *                  +-------------+
+ *                  |      0      |
+ *                  ---------------
+ *                  |  CSI-2 RX   |
+ *                  ---------------         +-----------+
+ *                  |      1      |         |  params   |
+ *                  +-------------+         | (output)  |
+ *                         |               +-----------+
+ *                         v                     |
+ *                      +------+------+          |
+ *                      |  0   |  1   |<---------+
+ *                      |------+------|
+ *                      |     ISP     |
+ *                      |------+------|
+ *        +-------------|  2   |  3   |----------+
+ *        |             +------+------+          |
+ *        |                |                     |
+ *        v                v                     v
+ *  +- ---------+    +-----------+         +-----------+
+ *  |     0     |    |     0     |         |   stats   |
+ *  -------------    -------------         | (capture) |
+ *  |  Resizer  |    |  Resizer  |         +-----------+
+ *  ------------|    ------------|
+ *  |     1     |    |     1     |
+ *  +-----------+    +-----------+
+ *        |                |
+ *        v                v
+ *  +-----------+    +-----------+
+ *  | selfpath  |    | mainpath  |
+ *  | (capture) |    | (capture) |
+ *  +-----------+    +-----------+
+ */
+
+struct rkisp1_isr_data {
+	const char *name;
+	irqreturn_t (*isr)(int irq, void *ctx);
+};
+
+/* ----------------------------------------------------------------------------
+ * Sensor DT bindings
+ */
+
+static int rkisp1_subdev_notifier_bound(struct v4l2_async_notifier *notifier,
+					struct v4l2_subdev *sd,
+					struct v4l2_async_connection *asc)
+{
+	struct rkisp1_device *rkisp1 =
+		container_of(notifier, struct rkisp1_device, notifier);
+	struct rkisp1_sensor_async *s_asd =
+		container_of(asc, struct rkisp1_sensor_async, asd);
+	int source_pad;
+	int ret;
+
+	s_asd->sd = sd;
+
+	source_pad = media_entity_get_fwnode_pad(&sd->entity, s_asd->source_ep,
+						 MEDIA_PAD_FL_SOURCE);
+	if (source_pad < 0) {
+		dev_err(rkisp1->dev, "failed to find source pad for %s\n",
+			sd->name);
+		return source_pad;
+	}
+
+	if (s_asd->port == 0)
+		return rkisp1_csi_link_sensor(rkisp1, sd, s_asd, source_pad);
+
+	ret = media_create_pad_link(&sd->entity, source_pad,
+				    &rkisp1->isp.sd.entity,
+				    RKISP1_ISP_PAD_SINK_VIDEO,
+				    !s_asd->index ? MEDIA_LNK_FL_ENABLED : 0);
+	if (ret) {
+		dev_err(rkisp1->dev, "failed to link source pad of %s\n",
+			sd->name);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int rkisp1_subdev_notifier_complete(struct v4l2_async_notifier *notifier)
+{
+	struct rkisp1_device *rkisp1 =
+		container_of(notifier, struct rkisp1_device, notifier);
+
+	return v4l2_device_register_subdev_nodes(&rkisp1->v4l2_dev);
+}
+
+static void rkisp1_subdev_notifier_destroy(struct v4l2_async_connection *asc)
+{
+	struct rkisp1_sensor_async *rk_asd =
+		container_of(asc, struct rkisp1_sensor_async, asd);
+
+	fwnode_handle_put(rk_asd->source_ep);
+}
+
+static const struct v4l2_async_notifier_operations rkisp1_subdev_notifier_ops = {
+	.bound = rkisp1_subdev_notifier_bound,
+	.complete = rkisp1_subdev_notifier_complete,
+	.destroy = rkisp1_subdev_notifier_destroy,
+};
+
+static int rkisp1_subdev_notifier_register(struct rkisp1_device *rkisp1)
+{
+	struct v4l2_async_notifier *ntf = &rkisp1->notifier;
+	struct fwnode_handle *fwnode = dev_fwnode(rkisp1->dev);
+	struct fwnode_handle *ep;
+	unsigned int index = 0;
+	int ret = 0;
+
+	v4l2_async_nf_init(ntf, &rkisp1->v4l2_dev);
+
+	ntf->ops = &rkisp1_subdev_notifier_ops;
+
+	fwnode_graph_for_each_endpoint(fwnode, ep) {
+		struct fwnode_handle *port;
+		struct v4l2_fwnode_endpoint vep = { };
+		struct rkisp1_sensor_async *rk_asd;
+		struct fwnode_handle *source;
+		u32 reg = 0;
+
+		/* Select the bus type based on the port. */
+		port = fwnode_get_parent(ep);
+		fwnode_property_read_u32(port, "reg", &reg);
+		fwnode_handle_put(port);
+
+		switch (reg) {
+		case 0:
+			/* MIPI CSI-2 port */
+			if (!(rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)) {
+				dev_err(rkisp1->dev,
+					"internal CSI must be available for port 0\n");
+				ret = -EINVAL;
+				break;
+			}
+
+			vep.bus_type = V4L2_MBUS_CSI2_DPHY;
+			break;
+
+		case 1:
+			/*
+			 * Parallel port. The bus-type property in DT is
+			 * mandatory for port 1, it will be used to determine if
+			 * it's PARALLEL or BT656.
+			 */
+			vep.bus_type = V4L2_MBUS_UNKNOWN;
+			break;
+		}
+
+		/* Parse the endpoint and validate the bus type. */
+		ret = v4l2_fwnode_endpoint_parse(ep, &vep);
+		if (ret) {
+			dev_err(rkisp1->dev, "failed to parse endpoint %pfw\n",
+				ep);
+			break;
+		}
+
+		if (vep.base.port == 1) {
+			if (vep.bus_type != V4L2_MBUS_PARALLEL &&
+			    vep.bus_type != V4L2_MBUS_BT656) {
+				dev_err(rkisp1->dev,
+					"port 1 must be parallel or BT656\n");
+				ret = -EINVAL;
+				break;
+			}
+		}
+
+		/* Add the async subdev to the notifier. */
+		source = fwnode_graph_get_remote_endpoint(ep);
+		if (!source) {
+			dev_err(rkisp1->dev,
+				"endpoint %pfw has no remote endpoint\n",
+				ep);
+			ret = -ENODEV;
+			break;
+		}
+
+		rk_asd = v4l2_async_nf_add_fwnode(ntf, source,
+						  struct rkisp1_sensor_async);
+		if (IS_ERR(rk_asd)) {
+			fwnode_handle_put(source);
+			ret = PTR_ERR(rk_asd);
+			break;
+		}
+
+		rk_asd->index = index++;
+		rk_asd->source_ep = source;
+		rk_asd->mbus_type = vep.bus_type;
+		rk_asd->port = vep.base.port;
+
+		if (vep.bus_type == V4L2_MBUS_CSI2_DPHY) {
+			rk_asd->mbus_flags = vep.bus.mipi_csi2.flags;
+			rk_asd->lanes = vep.bus.mipi_csi2.num_data_lanes;
+		} else {
+			rk_asd->mbus_flags = vep.bus.parallel.flags;
+		}
+
+		dev_dbg(rkisp1->dev, "registered ep id %d, bus type %u, %u lanes\n",
+			vep.base.id, rk_asd->mbus_type, rk_asd->lanes);
+	}
+
+	if (ret) {
+		fwnode_handle_put(ep);
+		v4l2_async_nf_cleanup(ntf);
+		return ret;
+	}
+
+	if (!index)
+		dev_dbg(rkisp1->dev, "no remote subdevice found\n");
+
+	ret = v4l2_async_nf_register(ntf);
+	if (ret) {
+		v4l2_async_nf_cleanup(ntf);
+		return ret;
+	}
+
+	return 0;
+}
+
+/* ----------------------------------------------------------------------------
+ * Power
+ */
+
+static int __maybe_unused rkisp1_runtime_suspend(struct device *dev)
+{
+	struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
+
+	clk_bulk_disable_unprepare(rkisp1->clk_size, rkisp1->clks);
+	return pinctrl_pm_select_sleep_state(dev);
+}
+
+static int __maybe_unused rkisp1_runtime_resume(struct device *dev)
+{
+	struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
+	int ret;
+
+	ret = pinctrl_pm_select_default_state(dev);
+	if (ret)
+		return ret;
+	ret = clk_bulk_prepare_enable(rkisp1->clk_size, rkisp1->clks);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct dev_pm_ops rkisp1_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(rkisp1_runtime_suspend, rkisp1_runtime_resume, NULL)
+};
+
+/* ----------------------------------------------------------------------------
+ * Core
+ */
+
+static int rkisp1_create_links(struct rkisp1_device *rkisp1)
+{
+	unsigned int i;
+	int ret;
+
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
+		/* Link the CSI receiver to the ISP. */
+		ret = media_create_pad_link(&rkisp1->csi.sd.entity,
+					    RKISP1_CSI_PAD_SRC,
+					    &rkisp1->isp.sd.entity,
+					    RKISP1_ISP_PAD_SINK_VIDEO,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret)
+			return ret;
+	}
+
+	/* create ISP->RSZ->CAP links */
+	for (i = 0; i < 2; i++) {
+		struct media_entity *resizer =
+			&rkisp1->resizer_devs[i].sd.entity;
+		struct media_entity *capture =
+			&rkisp1->capture_devs[i].vnode.vdev.entity;
+
+		ret = media_create_pad_link(&rkisp1->isp.sd.entity,
+					    RKISP1_ISP_PAD_SOURCE_VIDEO,
+					    resizer, RKISP1_RSZ_PAD_SINK,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret)
+			return ret;
+
+		ret = media_create_pad_link(resizer, RKISP1_RSZ_PAD_SRC,
+					    capture, 0,
+					    MEDIA_LNK_FL_ENABLED |
+					    MEDIA_LNK_FL_IMMUTABLE);
+		if (ret)
+			return ret;
+	}
+
+	/* params links */
+	ret = media_create_pad_link(&rkisp1->params.vnode.vdev.entity, 0,
+				    &rkisp1->isp.sd.entity,
+				    RKISP1_ISP_PAD_SINK_PARAMS,
+				    MEDIA_LNK_FL_ENABLED |
+				    MEDIA_LNK_FL_IMMUTABLE);
+	if (ret)
+		return ret;
+
+	/* 3A stats links */
+	return media_create_pad_link(&rkisp1->isp.sd.entity,
+				     RKISP1_ISP_PAD_SOURCE_STATS,
+				     &rkisp1->stats.vnode.vdev.entity, 0,
+				     MEDIA_LNK_FL_ENABLED |
+				     MEDIA_LNK_FL_IMMUTABLE);
+}
+
+static void rkisp1_entities_unregister(struct rkisp1_device *rkisp1)
+{
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
+		rkisp1_csi_unregister(rkisp1);
+	rkisp1_params_unregister(rkisp1);
+	rkisp1_stats_unregister(rkisp1);
+	rkisp1_capture_devs_unregister(rkisp1);
+	rkisp1_resizer_devs_unregister(rkisp1);
+	rkisp1_isp_unregister(rkisp1);
+}
+
+static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
+{
+	int ret;
+
+	ret = rkisp1_isp_register(rkisp1);
+	if (ret)
+		goto error;
+
+	ret = rkisp1_resizer_devs_register(rkisp1);
+	if (ret)
+		goto error;
+
+	ret = rkisp1_capture_devs_register(rkisp1);
+	if (ret)
+		goto error;
+
+	ret = rkisp1_stats_register(rkisp1);
+	if (ret)
+		goto error;
+
+	ret = rkisp1_params_register(rkisp1);
+	if (ret)
+		goto error;
+
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
+		ret = rkisp1_csi_register(rkisp1);
+		if (ret)
+			goto error;
+	}
+
+	ret = rkisp1_create_links(rkisp1);
+	if (ret)
+		goto error;
+
+	return 0;
+
+error:
+	rkisp1_entities_unregister(rkisp1);
+	return ret;
+}
+
+static irqreturn_t rkisp1_isr(int irq, void *ctx)
+{
+	/*
+	 * Call rkisp1_capture_isr() first to handle the frame that
+	 * potentially completed using the current frame_sequence number before
+	 * it is potentially incremented by rkisp1_isp_isr() in the vertical
+	 * sync.
+	 */
+	rkisp1_capture_isr(irq, ctx);
+	rkisp1_isp_isr(irq, ctx);
+	rkisp1_csi_isr(irq, ctx);
+
+	return IRQ_HANDLED;
+}
+
+static const char * const px30_isp_clks[] = {
+	"isp",
+	"aclk",
+	"hclk",
+	"pclk",
+};
+
+static const struct rkisp1_isr_data px30_isp_isrs[] = {
+	{ "isp", rkisp1_isp_isr },
+	{ "mi", rkisp1_capture_isr },
+	{ "mipi", rkisp1_csi_isr },
+};
+
+static const struct rkisp1_info px30_isp_info = {
+	.clks = px30_isp_clks,
+	.clk_size = ARRAY_SIZE(px30_isp_clks),
+	.isrs = px30_isp_isrs,
+	.isr_size = ARRAY_SIZE(px30_isp_isrs),
+	.isp_ver = RKISP1_V12,
+	.features = RKISP1_FEATURE_MIPI_CSI2,
+};
+
+static const char * const rk3399_isp_clks[] = {
+	"isp",
+	"aclk",
+	"hclk",
+};
+
+static const struct rkisp1_isr_data rk3399_isp_isrs[] = {
+	{ NULL, rkisp1_isr },
+};
+
+static const struct rkisp1_info rk3399_isp_info = {
+	.clks = rk3399_isp_clks,
+	.clk_size = ARRAY_SIZE(rk3399_isp_clks),
+	.isrs = rk3399_isp_isrs,
+	.isr_size = ARRAY_SIZE(rk3399_isp_isrs),
+	.isp_ver = RKISP1_V10,
+	.features = RKISP1_FEATURE_MIPI_CSI2,
+};
+
+static const struct of_device_id rkisp1_of_match[] = {
+	{
+		.compatible = "rockchip,px30-cif-isp",
+		.data = &px30_isp_info,
+	},
+	{
+		.compatible = "rockchip,rk3399-cif-isp",
+		.data = &rk3399_isp_info,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, rkisp1_of_match);
+
+static int rkisp1_probe(struct platform_device *pdev)
+{
+	const struct rkisp1_info *info;
+	struct device *dev = &pdev->dev;
+	struct rkisp1_device *rkisp1;
+	struct v4l2_device *v4l2_dev;
+	unsigned int i;
+	int ret, irq;
+	u32 cif_id;
+
+	rkisp1 = devm_kzalloc(dev, sizeof(*rkisp1), GFP_KERNEL);
+	if (!rkisp1)
+		return -ENOMEM;
+
+	info = of_device_get_match_data(dev);
+	rkisp1->info = info;
+
+	dev_set_drvdata(dev, rkisp1);
+	rkisp1->dev = dev;
+
+	mutex_init(&rkisp1->stream_lock);
+
+	rkisp1->base_addr = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(rkisp1->base_addr))
+		return PTR_ERR(rkisp1->base_addr);
+
+	for (i = 0; i < info->isr_size; i++) {
+		irq = info->isrs[i].name
+		    ? platform_get_irq_byname(pdev, info->isrs[i].name)
+		    : platform_get_irq(pdev, i);
+		if (irq < 0)
+			return irq;
+
+		ret = devm_request_irq(dev, irq, info->isrs[i].isr, IRQF_SHARED,
+				       dev_driver_string(dev), dev);
+		if (ret) {
+			dev_err(dev, "request irq failed: %d\n", ret);
+			return ret;
+		}
+	}
+
+	for (i = 0; i < info->clk_size; i++)
+		rkisp1->clks[i].id = info->clks[i];
+	ret = devm_clk_bulk_get(dev, info->clk_size, rkisp1->clks);
+	if (ret)
+		return ret;
+	rkisp1->clk_size = info->clk_size;
+
+	pm_runtime_enable(&pdev->dev);
+
+	ret = pm_runtime_resume_and_get(&pdev->dev);
+	if (ret)
+		goto err_pm_runtime_disable;
+
+	cif_id = rkisp1_read(rkisp1, RKISP1_CIF_VI_ID);
+	dev_dbg(rkisp1->dev, "CIF_ID 0x%08x\n", cif_id);
+
+	pm_runtime_put(&pdev->dev);
+
+	rkisp1->media_dev.hw_revision = info->isp_ver;
+	strscpy(rkisp1->media_dev.model, RKISP1_DRIVER_NAME,
+		sizeof(rkisp1->media_dev.model));
+	rkisp1->media_dev.dev = &pdev->dev;
+	strscpy(rkisp1->media_dev.bus_info, RKISP1_BUS_INFO,
+		sizeof(rkisp1->media_dev.bus_info));
+	media_device_init(&rkisp1->media_dev);
+
+	v4l2_dev = &rkisp1->v4l2_dev;
+	v4l2_dev->mdev = &rkisp1->media_dev;
+	strscpy(v4l2_dev->name, RKISP1_DRIVER_NAME, sizeof(v4l2_dev->name));
+
+	ret = v4l2_device_register(rkisp1->dev, &rkisp1->v4l2_dev);
+	if (ret)
+		goto err_media_dev_cleanup;
+
+	ret = media_device_register(&rkisp1->media_dev);
+	if (ret) {
+		dev_err(dev, "Failed to register media device: %d\n", ret);
+		goto err_unreg_v4l2_dev;
+	}
+
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
+		ret = rkisp1_csi_init(rkisp1);
+		if (ret)
+			goto err_unreg_media_dev;
+	}
+
+	ret = rkisp1_entities_register(rkisp1);
+	if (ret)
+		goto err_cleanup_csi;
+
+	ret = rkisp1_subdev_notifier_register(rkisp1);
+	if (ret)
+		goto err_unreg_entities;
+
+	rkisp1_debug_init(rkisp1);
+
+	return 0;
+
+err_unreg_entities:
+	rkisp1_entities_unregister(rkisp1);
+err_cleanup_csi:
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
+		rkisp1_csi_cleanup(rkisp1);
+err_unreg_media_dev:
+	media_device_unregister(&rkisp1->media_dev);
+err_unreg_v4l2_dev:
+	v4l2_device_unregister(&rkisp1->v4l2_dev);
+err_media_dev_cleanup:
+	media_device_cleanup(&rkisp1->media_dev);
+err_pm_runtime_disable:
+	pm_runtime_disable(&pdev->dev);
+	return ret;
+}
+
+static void rkisp1_remove(struct platform_device *pdev)
+{
+	struct rkisp1_device *rkisp1 = platform_get_drvdata(pdev);
+
+	v4l2_async_nf_unregister(&rkisp1->notifier);
+	v4l2_async_nf_cleanup(&rkisp1->notifier);
+
+	rkisp1_entities_unregister(rkisp1);
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
+		rkisp1_csi_cleanup(rkisp1);
+	rkisp1_debug_cleanup(rkisp1);
+
+	media_device_unregister(&rkisp1->media_dev);
+	v4l2_device_unregister(&rkisp1->v4l2_dev);
+
+	media_device_cleanup(&rkisp1->media_dev);
+
+	pm_runtime_disable(&pdev->dev);
+}
+
+static struct platform_driver rkisp1_drv = {
+	.driver = {
+		.name = RKISP1_DRIVER_NAME,
+		.of_match_table = of_match_ptr(rkisp1_of_match),
+		.pm = &rkisp1_pm_ops,
+	},
+	.probe = rkisp1_probe,
+	.remove_new = rkisp1_remove,
+};
+
+module_platform_driver(rkisp1_drv);
+MODULE_DESCRIPTION("Rockchip ISP1 platform driver");
+MODULE_LICENSE("Dual MIT/GPL");