| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-id: <1418226513-14105-10-git-send-email-a.hajda@samsung.com>
Date: Wed, 10 Dec 2014 16:48:27 +0100
From: Andrzej Hajda <a.hajda@...sung.com>
To: linux-kernel@...r.kernel.org (open list)
Cc: Andrzej Hajda <a.hajda@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mike Turquette <mturquette@...aro.org>,
Russell King <linux@....linux.org.uk>,
Linus Walleij <linus.walleij@...aro.org>,
Alexandre Courbot <gnurou@...il.com>,
Thierry Reding <thierry.reding@...il.com>,
Inki Dae <inki.dae@...sung.com>,
Kishon Vijay Abraham I <kishon@...com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
linux-arm-kernel@...ts.infradead.org (moderated list:ARM/CLKDEV SUPPORT),
linux-gpio@...r.kernel.org (open list:GPIO SUBSYSTEM),
dri-devel@...ts.freedesktop.org (open list:DRM PANEL DRIVERS),
linux-samsung-soc@...r.kernel.org (moderated list:ARM/S5P EXYNOS AR...),
devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND...),
boris.brezillon@...e-electrons.com
Subject: [RFC 09/15] phy: add restrack support
PHYs supports different methods of lookup.
The patch adds restrack support only to DT based PHYs.
Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
drivers/phy/phy-core.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/phy/phy.h | 3 ++
include/linux/restrack.h | 1 +
3 files changed, 94 insertions(+)
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index ff5eec5..449ec4e 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -22,6 +22,7 @@
#include <linux/idr.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
+#include <linux/restrack.h>
static struct class *phy_class;
static DEFINE_MUTEX(phy_provider_mutex);
@@ -754,6 +755,8 @@ struct phy_provider *__of_phy_provider_register(struct device *dev,
list_add_tail(&phy_provider->list, &phy_provider_list);
mutex_unlock(&phy_provider_mutex);
+ restrack_up(RESTRACK_TYPE_PHY, dev->of_node, phy_provider);
+
return phy_provider;
}
EXPORT_SYMBOL_GPL(__of_phy_provider_register);
@@ -804,6 +807,9 @@ void of_phy_provider_unregister(struct phy_provider *phy_provider)
if (IS_ERR(phy_provider))
return;
+ restrack_down(RESTRACK_TYPE_PHY, phy_provider->dev->of_node,
+ phy_provider);
+
mutex_lock(&phy_provider_mutex);
list_del(&phy_provider->list);
kfree(phy_provider);
@@ -828,6 +834,90 @@ void devm_of_phy_provider_unregister(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);
+int of_get_phy_spec(struct device *dev, const char *name,
+ struct of_phandle_args *spec)
+{
+ struct device_node *np = dev->of_node;
+ int idx;
+
+ idx = of_property_match_string(np, "phy-names", name);
+
+ return of_parse_phandle_with_args(np, "phys", "#phy-cells", idx, spec);
+}
+
+struct phy_restrack_desc {
+ struct phy **ptr;
+ const char *name;
+ struct of_phandle_args spec;
+ struct restrack_desc desc;
+};
+
+static int phy_restrack_init(struct device *dev,
+ struct restrack_desc *desc)
+{
+ struct phy_restrack_desc *rd = restrack_desc_to_rd(rd, desc);
+ int ret;
+
+ ret = of_get_phy_spec(dev, rd->name, &rd->spec);
+ if (!ret)
+ desc->if_id = rd->spec.np;
+ return ret;
+}
+
+static void phy_restrack_destroy(struct device *dev,
+ struct restrack_desc *desc)
+{
+ struct phy_restrack_desc *rd = restrack_desc_to_rd(rd, desc);
+
+ of_node_put(desc->if_id);
+ kfree(rd);
+}
+
+static int phy_restrack_ifup(struct device *dev,
+ struct restrack_desc *desc, void *data)
+{
+ struct phy_restrack_desc *rd = restrack_desc_to_rd(rd, desc);
+ struct phy_provider *phy_provider = data;
+
+ *rd->ptr = phy_provider->of_xlate(phy_provider->dev, &rd->spec);
+ return PTR_ERR_OR_ZERO(*rd->ptr);
+}
+
+static void phy_restrack_ifdown(struct device *dev,
+ struct restrack_desc *desc, void *data)
+{
+ struct phy_restrack_desc *rd = restrack_desc_to_rd(rd, desc);
+
+ *rd->ptr = ERR_PTR(-EPROBE_DEFER);
+}
+
+static const struct restrack_ops phy_restrack_ops = {
+ .if_type = RESTRACK_TYPE_PHY,
+ .init = phy_restrack_init,
+ .destroy = phy_restrack_destroy,
+ .if_up = phy_restrack_ifup,
+ .if_down = phy_restrack_ifdown,
+};
+
+/**
+ * phy_restrack_desc - phy resource descriptor allocator
+ * @phy: pointer to variable which will be set to phy handle
+ * @name: name of phy
+ *
+ * The function creates resource description for phy, which shall be used
+ * by *restrack_register functions.
+ */
+struct restrack_desc *phy_restrack_desc(struct phy **phy, const char *name)
+{
+ struct phy_restrack_desc *rd;
+
+ RESTRACK_DESC_ALLOC(rd, phy_restrack_ops, phy, name);
+
+ return rd ? &rd->desc : ERR_PTR(-ENOMEM);
+}
+EXPORT_SYMBOL_GPL(phy_restrack_desc);
+
+
/**
* phy_release() - release the phy
* @dev: the dev member within phy
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 8cb6f81..14d176c 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -174,6 +174,9 @@ struct phy_provider *__devm_of_phy_provider_register(struct device *dev,
void of_phy_provider_unregister(struct phy_provider *phy_provider);
void devm_of_phy_provider_unregister(struct device *dev,
struct phy_provider *phy_provider);
+
+struct restrack_desc;
+struct restrack_desc *phy_restrack_desc(struct phy **phy, const char *name);
#else
static inline int phy_pm_runtime_get(struct phy *phy)
{
diff --git a/include/linux/restrack.h b/include/linux/restrack.h
index 6707dce..411d791 100644
--- a/include/linux/restrack.h
+++ b/include/linux/restrack.h
@@ -7,6 +7,7 @@
#define RESTRACK_TYPE_REGULATOR 2
#define RESTRACK_TYPE_GPIO 3
#define RESTRACK_TYPE_CLOCK 4
+#define RESTRACK_TYPE_PHY 5
struct device;
struct restrack_ctx;
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists