From 3321371b5d648479058fa6f9441168abbc1467c9 Mon Sep 17 00:00:00 2001
From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Date: Fri, 18 Aug 2017 17:57:35 +0300
Subject: [PATCH] intel_th: pci: Use drvdata for quirks

Allow attaching miscellaneous quirk information to devices as drvdata.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
---
 drivers/hwtracing/intel_th/core.c     |  6 ++++--
 drivers/hwtracing/intel_th/intel_th.h | 27 ++++++++++++++++++++-------
 drivers/hwtracing/intel_th/pci.c      |  3 ++-
 3 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index d1760003b4a4..e915ab24f434 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -576,6 +576,7 @@ intel_th_subdevice_alloc(struct intel_th *th,
 	if (!thdev)
 		return ERR_PTR(-ENOMEM);
 
+	thdev->drvdata = th->drvdata;
 
 	memcpy(res, subdev->res,
 	       sizeof(struct resource) * subdev->nres);
@@ -789,8 +790,8 @@ static const struct file_operations intel_th_output_fops = {
  * @irq:	irq number
  */
 struct intel_th *
-intel_th_alloc(struct device *dev, struct resource *devres,
-	       unsigned int ndevres, int irq)
+intel_th_alloc(struct device *dev, struct intel_th_drvdata *drvdata,
+	       struct resource *devres, unsigned int ndevres, int irq)
 {
 	struct intel_th *th;
 	int err;
@@ -812,6 +813,7 @@ intel_th_alloc(struct device *dev, struct resource *devres,
 		goto err_ida;
 	}
 	th->dev = dev;
+	th->drvdata = drvdata;
 
 	th->resource = devres;
 	th->num_resources = ndevres;
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h
index 3f4558404dca..68244602ca29 100644
--- a/drivers/hwtracing/intel_th/intel_th.h
+++ b/drivers/hwtracing/intel_th/intel_th.h
@@ -47,9 +47,20 @@ struct intel_th_output {
 	bool		active;
 };
 
+/**
+ * struct intel_th_drvdata - describes hardware capabilities and quirks
+ * @tscu_enable:	device needs SW to enable time stamping unit
+ */
+struct intel_th_drvdata {
+	unsigned int	tscu_enable        : 1;
+};
+
+#define INTEL_TH_CAP(_th, _cap) ((_th)->drvdata ? (_th)->drvdata->_cap : 0)
+
 /**
  * struct intel_th_device - device on the intel_th bus
  * @dev:		device
+ * @drvdata:		hardware capabilities/quirks
  * @resource:		array of resources available to this device
  * @num_resources:	number of resources in @resource array
  * @type:		INTEL_TH_{SOURCE,OUTPUT,SWITCH}
@@ -59,11 +70,12 @@ struct intel_th_output {
  * @name:		device name to match the driver
  */
 struct intel_th_device {
-	struct device	dev;
-	struct resource	*resource;
-	unsigned int	num_resources;
-	unsigned int	type;
-	int		id;
+	struct device		dev;
+	struct intel_th_drvdata *drvdata;
+	struct resource		*resource;
+	unsigned int		num_resources;
+	unsigned int		type;
+	int			id;
 
 	/* INTEL_TH_SWITCH specific */
 	bool			host_mode;
@@ -206,8 +218,8 @@ static inline struct intel_th *to_intel_th(struct intel_th_device *thdev)
 }
 
 struct intel_th *
-intel_th_alloc(struct device *dev, struct resource *devres,
-	       unsigned int ndevres, int irq);
+intel_th_alloc(struct device *dev, struct intel_th_drvdata *drvdata,
+	       struct resource *devres, unsigned int ndevres, int irq);
 void intel_th_free(struct intel_th *th);
 
 int intel_th_driver_register(struct intel_th_driver *thdrv);
@@ -248,6 +260,7 @@ struct intel_th {
 
 	struct intel_th_device	*thdev[TH_SUBDEVICE_MAX];
 	struct intel_th_device	*hub;
+	struct intel_th_drvdata	*drvdata;
 
 	struct resource		*resource;
 	unsigned int		num_thdevs;
diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c
index 5a9a9e8072a9..aed6d594991e 100644
--- a/drivers/hwtracing/intel_th/pci.c
+++ b/drivers/hwtracing/intel_th/pci.c
@@ -30,6 +30,7 @@
 static int intel_th_pci_probe(struct pci_dev *pdev,
 			      const struct pci_device_id *id)
 {
+	struct intel_th_drvdata *drvdata = (void *)id->driver_data;
 	struct intel_th *th;
 	int err;
 
@@ -41,7 +42,7 @@ static int intel_th_pci_probe(struct pci_dev *pdev,
 	if (err)
 		return err;
 
-	th = intel_th_alloc(&pdev->dev, pdev->resource,
+	th = intel_th_alloc(&pdev->dev, drvdata, pdev->resource,
 			    DEVICE_COUNT_RESOURCE, pdev->irq);
 	if (IS_ERR(th))
 		return PTR_ERR(th);