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Date: Wed, 25 Mar 2015 10:51:56 +0100
From: Holger Dengler <dengler@...utronix.de>
To: linux-kernel@...r.kernel.org
Cc: Peter Mahler <mahler@...ug.com>, Juergen Bubeck <bubeck@...ug.com>,
Benedikt Spranger <b.spranger@...utronix.de>,
Holger Dengler <dengler@...utronix.de>,
Samuel Ortiz <sameo@...ux.intel.com>,
Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 07/11] mfd: flexcard: add UIO IRQ devices
From: Benedikt Spranger <b.spranger@...utronix.de>
Add an UIO device for each Flexcard Flexray related trigger. The trigger
devide into:
- Flexray cycle start (CCYS)
- Flexray timer 0 (CCxT0)
- Bus wakeup (WAKE)
The UIO IRQ devices can be used to synchronize an application
with these events.
Signed-off-by: Holger Dengler <dengler@...utronix.de>
Signed-off-by: Benedikt Spranger <b.spranger@...utronix.de>
cc: Samuel Ortiz <sameo@...ux.intel.com>
cc: Lee Jones <lee.jones@...aro.org>
---
drivers/mfd/flexcard/core.c | 52 +++++++++++++++++++++++++++++++++++++++++
drivers/mfd/flexcard/flexcard.h | 23 ++++++++++++++++++
2 files changed, 75 insertions(+)
diff --git a/drivers/mfd/flexcard/core.c b/drivers/mfd/flexcard/core.c
index a6f92b4..cd06854 100644
--- a/drivers/mfd/flexcard/core.c
+++ b/drivers/mfd/flexcard/core.c
@@ -19,6 +19,7 @@
#include <linux/miscdevice.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/flexcard.h>
@@ -51,6 +52,42 @@ static struct mfd_cell flexcard_clk_dev[] = {
},
};
+irq_res(CC1CCYS);
+irq_res(CC2CCYS);
+irq_res(CC3CCYS);
+irq_res(CC4CCYS);
+irq_res(WAKE4A);
+irq_res(WAKE4B);
+irq_res(WAKE3A);
+irq_res(WAKE3B);
+irq_res(WAKE2A);
+irq_res(WAKE2B);
+irq_res(WAKE1A);
+irq_res(WAKE1B);
+irq_res(CC1T0);
+irq_res(CC2T0);
+irq_res(CC3T0);
+irq_res(CC4T0);
+
+static struct mfd_cell flexcard_uio_dev[] = {
+ flexcard_irq_cell(CC3CCYS, 0),
+ flexcard_irq_cell(CC4CCYS, 1),
+ flexcard_irq_cell(WAKE4A, 2),
+ flexcard_irq_cell(WAKE4B, 3),
+ flexcard_irq_cell(WAKE3A, 4),
+ flexcard_irq_cell(WAKE3B, 5),
+ flexcard_irq_cell(WAKE2A, 6),
+ flexcard_irq_cell(WAKE2B, 7),
+ flexcard_irq_cell(WAKE1A, 8),
+ flexcard_irq_cell(WAKE1B, 9),
+ flexcard_irq_cell(CC1CCYS, 10),
+ flexcard_irq_cell(CC2CCYS, 11),
+ flexcard_irq_cell(CC1T0, 12),
+ flexcard_irq_cell(CC2T0, 13),
+ flexcard_irq_cell(CC3T0, 14),
+ flexcard_irq_cell(CC4T0, 15),
+};
+
static int flexcard_tiny_can(struct flexcard_device *priv,
int idx, int id, u32 offset)
{
@@ -150,6 +187,15 @@ static int flexcard_clk_setup(struct flexcard_device *priv)
&pdev->resource[0], 0, NULL);
}
+static int flexcard_add_uio(struct flexcard_device *priv)
+{
+ struct pci_dev *pdev = priv->pdev;
+
+ return mfd_add_devices(&pdev->dev, 0, flexcard_uio_dev,
+ ARRAY_SIZE(flexcard_uio_dev),
+ NULL, 0, priv->irq_domain);
+}
+
static int flexcard_misc_open(struct inode *inode, struct file *filp)
{
struct flexcard_device *priv =
@@ -284,6 +330,12 @@ static int flexcard_probe(struct pci_dev *pdev,
goto out_remove;
}
+ ret = flexcard_add_uio(priv);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to add irq UIO devices: %d", ret);
+ goto out_remove;
+ }
+
ret = misc_register(&priv->dev);
if (ret) {
dev_err(&pdev->dev, "unable to register miscdevice: %d\n", ret);
diff --git a/drivers/mfd/flexcard/flexcard.h b/drivers/mfd/flexcard/flexcard.h
index 038c138..0d05f78 100644
--- a/drivers/mfd/flexcard/flexcard.h
+++ b/drivers/mfd/flexcard/flexcard.h
@@ -6,4 +6,27 @@ void flexcard_misc_del_attrs(struct device *dev);
int flexcard_setup_irq(struct pci_dev *pdev);
void flexcard_remove_irq(struct pci_dev *pdev);
+#define irq_res(irq_name) \
+ static struct resource flexcard_irq_res_##irq_name = { \
+ .name = __stringify(fc_irq_##irq_name##_off), \
+ .start = FLEXCARD_IRQ_##irq_name##_OFF, \
+ .end = FLEXCARD_IRQ_##irq_name##_OFF, \
+ .flags = IORESOURCE_IRQ, \
+ }; \
+ \
+ static struct uio_info flexcard_irq_pdata_##irq_name = { \
+ .name = __stringify(irq_name), \
+ .version = "0", \
+ }
+
+#define flexcard_irq_cell(irq_name, irq_id) \
+ { \
+ .id = irq_id, \
+ .name = "uio_pdrv_genirq", \
+ .platform_data = &flexcard_irq_pdata_##irq_name, \
+ .pdata_size = sizeof(flexcard_irq_pdata_##irq_name), \
+ .num_resources = 1, \
+ .resources = &flexcard_irq_res_##irq_name \
+ }
+
#endif /* __FLEXCARD_H */
--
2.1.4
--
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