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Message-ID: <1406932118-13885-4-git-send-email-atull@opensource.altera.com>
Date: Fri, 1 Aug 2014 17:28:38 -0500
From: <atull@...nsource.altera.com>
To: <gregkh@...uxfoundation.org>, <jgunthorpe@...idianresearch.com>,
<hpa@...or.com>, <monstr@...str.eu>, <michal.simek@...inx.com>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<pantelis.antoniou@...sulko.com>, <robh+dt@...nel.org>,
<grant.likely@...aro.org>, <pavel@...x.de>, <broonie@...nel.org>,
<philip@...ister.org>, <rubini@...dd.com>,
<s.trumtrar@...gutronix.de>, <jason@...edaemon.net>,
<kyle.teske@...com>, <nico@...aro.org>, <balbi@...com>,
<m.chehab@...sung.com>, <davidb@...eaurora.org>, <rob@...dley.net>,
<davem@...emloft.net>, <cesarb@...arb.net>,
<sameo@...ux.intel.com>, <akpm@...ux-foundation.org>,
<linus.walleij@...aro.org>, <delicious.quinoa@...il.com>,
<dinguyen@...nsource.altera.com>, <yvanderv@...nsource.altera.com>,
Alan Tull <atull@...nsource.altera.com>
Subject: [PATCH 3/3] fpga sysfs interface
From: Alan Tull <atull@...nsource.altera.com>
Add basic sysfs interface. Only exports two files:
/sys/class/fpga_manager/fpga0/name
Name of low level driver.
/sys/class/fpga_manager/fpga0/status
status of fpga framework as returned by core
fpga-mgr.c's fpga_mgr_ops_framework_status
function or by the low level driver's status
function.
Signed-off-by: Alan Tull <atull@...nsource.altera.com>
---
drivers/fpga/Kconfig | 7 +++++
drivers/fpga/Makefile | 1 +
drivers/fpga/fpga-mgr.c | 2 ++
drivers/fpga/sysfs.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++
include/linux/fpga-mgr.h | 12 ++++++++
5 files changed, 91 insertions(+)
create mode 100644 drivers/fpga/sysfs.c
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 9a2c25b..113b8b4 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -17,4 +17,11 @@ config FPGA_MGR_BUS
help
FPGA Manager Bus interface. Allows loading FPGA images
from Device Tree or from other drivers.
+
+config FPGA_MGR_SYSFS
+ bool "FPGA Manager SysFS Interface"
+ depends on FPGA
+ depends on SYSFS
+ help
+ FPGA Manager SysFS interface.
endmenu
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index e39911f..cad3d8c 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -7,5 +7,6 @@ fpga-mgr-core-y += fpga-mgr.o
# Core FPGA Manager Framework
obj-$(CONFIG_FPGA) += fpga-mgr-core.o
obj-$(CONFIG_FPGA_MGR_BUS) += bus.o
+obj-$(CONFIG_FPGA_MGR_SYSFS) += sysfs.o
# FPGA Manager Drivers
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index 93327ea..a604de7 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -402,6 +402,8 @@ static int __init fpga_mgr_dev_init(void)
if (IS_ERR(fpga_mgr_class))
return PTR_ERR(fpga_mgr_class);
+ fpga_mgr_sysfs_init(fpga_mgr_class);
+
ret = alloc_chrdev_region(&fpga_mgr_dev, 0, FPGA_MAX_MINORS,
"fpga_manager");
if (ret) {
diff --git a/drivers/fpga/sysfs.c b/drivers/fpga/sysfs.c
new file mode 100644
index 0000000..ba2332d
--- /dev/null
+++ b/drivers/fpga/sysfs.c
@@ -0,0 +1,69 @@
+/*
+ * FPGA Manager SysFS Interface
+ *
+ * Copyright (C) 2013-2014 Altera Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/fpga-mgr.h>
+
+/*
+ * class attributes
+ */
+static ssize_t fpga_mgr_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fpga_manager *mgr = dev_get_drvdata(dev);
+
+ return fpga_mgr_name(mgr, buf);
+}
+
+static ssize_t fpga_mgr_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fpga_manager *mgr = dev_get_drvdata(dev);
+
+ return fpga_mgr_status_get(mgr, buf);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, fpga_mgr_name_show, NULL);
+static DEVICE_ATTR(status, S_IRUGO, fpga_mgr_status_show, NULL);
+
+static struct attribute *fpga_mgr_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_status.attr,
+ NULL,
+};
+
+static const struct attribute_group fpga_mgr_group = {
+ .attrs = fpga_mgr_attrs,
+};
+
+const struct attribute_group *fpga_mgr_groups[] = {
+ &fpga_mgr_group,
+ NULL,
+};
+
+void fpga_mgr_sysfs_init(struct class *fpga_mgr_class)
+{
+ fpga_mgr_class->dev_groups = fpga_mgr_groups;
+}
+EXPORT_SYMBOL_GPL(fpga_mgr_sysfs_init);
+
+MODULE_AUTHOR("Alan Tull <atull@...nsource.altera.com>");
+MODULE_DESCRIPTION("FPGA Manager framework driver sysfs interface");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/fpga-mgr.h b/include/linux/fpga-mgr.h
index 35d3380..86eeff5 100644
--- a/include/linux/fpga-mgr.h
+++ b/include/linux/fpga-mgr.h
@@ -105,6 +105,18 @@ struct fpga_manager {
#if IS_ENABLED(CONFIG_FPGA)
+#ifdef CONFIG_FPGA_MGR_SYSFS
+
+void fpga_mgr_sysfs_init(struct class *fpga_mgr_class);
+
+#else
+
+static inline void fpga_mgr_sysfs_init(struct class *fpga_mgr_class)
+{
+}
+
+#endif /* CONFIG_FPGA_MGR_SYSFS */
+
struct fpga_manager *of_fpga_mgr_dev_lookup(struct device_node *node,
const char *mgr_property,
int *ret);
--
1.7.9.5
--
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