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From: Fabien Dessenne <fabien.dessenne@st.com>
To: Ohad Ben-Cohen <ohad@wizery.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	linux-remoteproc@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Fabien Dessenne <fabien.dessenne@st.com>,
	Benjamin Gaignard <benjamin.gaignard@st.com>
Subject: [PATCH] hwspinlock: stm32: implement the relax() ops
Date: Thu, 7 Mar 2019 16:42:16 +0100	[thread overview]
Message-ID: <1551973336-23048-1-git-send-email-fabien.dessenne@st.com> (raw)

Implement this optional ops, called by hwspinlock core while spinning on
a lock, between two successive invocations of trylock().

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
---
 drivers/hwspinlock/stm32_hwspinlock.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c
index 4418392..c8eacf4 100644
--- a/drivers/hwspinlock/stm32_hwspinlock.c
+++ b/drivers/hwspinlock/stm32_hwspinlock.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/hwspinlock.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
@@ -42,9 +43,15 @@ static void stm32_hwspinlock_unlock(struct hwspinlock *lock)
 	writel(STM32_MUTEX_COREID, lock_addr);
 }
 
+static void stm32_hwspinlock_relax(struct hwspinlock *lock)
+{
+	ndelay(50);
+}
+
 static const struct hwspinlock_ops stm32_hwspinlock_ops = {
 	.trylock	= stm32_hwspinlock_trylock,
 	.unlock		= stm32_hwspinlock_unlock,
+	.relax		= stm32_hwspinlock_relax,
 };
 
 static int stm32_hwspinlock_probe(struct platform_device *pdev)
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)
From: Fabien Dessenne <fabien.dessenne@st.com>
To: Ohad Ben-Cohen <ohad@wizery.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	<linux-remoteproc@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>
Cc: Fabien Dessenne <fabien.dessenne@st.com>,
	Benjamin Gaignard <benjamin.gaignard@st.com>
Subject: [PATCH] hwspinlock: stm32: implement the relax() ops
Date: Thu, 7 Mar 2019 16:42:16 +0100	[thread overview]
Message-ID: <1551973336-23048-1-git-send-email-fabien.dessenne@st.com> (raw)

Implement this optional ops, called by hwspinlock core while spinning on
a lock, between two successive invocations of trylock().

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
---
 drivers/hwspinlock/stm32_hwspinlock.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c
index 4418392..c8eacf4 100644
--- a/drivers/hwspinlock/stm32_hwspinlock.c
+++ b/drivers/hwspinlock/stm32_hwspinlock.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/hwspinlock.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
@@ -42,9 +43,15 @@ static void stm32_hwspinlock_unlock(struct hwspinlock *lock)
 	writel(STM32_MUTEX_COREID, lock_addr);
 }
 
+static void stm32_hwspinlock_relax(struct hwspinlock *lock)
+{
+	ndelay(50);
+}
+
 static const struct hwspinlock_ops stm32_hwspinlock_ops = {
 	.trylock	= stm32_hwspinlock_trylock,
 	.unlock		= stm32_hwspinlock_unlock,
+	.relax		= stm32_hwspinlock_relax,
 };
 
 static int stm32_hwspinlock_probe(struct platform_device *pdev)
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: Fabien Dessenne <fabien.dessenne@st.com>
To: Ohad Ben-Cohen <ohad@wizery.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	<linux-remoteproc@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>
Cc: Benjamin Gaignard <benjamin.gaignard@st.com>,
	Fabien Dessenne <fabien.dessenne@st.com>
Subject: [PATCH] hwspinlock: stm32: implement the relax() ops
Date: Thu, 7 Mar 2019 16:42:16 +0100	[thread overview]
Message-ID: <1551973336-23048-1-git-send-email-fabien.dessenne@st.com> (raw)

Implement this optional ops, called by hwspinlock core while spinning on
a lock, between two successive invocations of trylock().

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
---
 drivers/hwspinlock/stm32_hwspinlock.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c
index 4418392..c8eacf4 100644
--- a/drivers/hwspinlock/stm32_hwspinlock.c
+++ b/drivers/hwspinlock/stm32_hwspinlock.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/hwspinlock.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
@@ -42,9 +43,15 @@ static void stm32_hwspinlock_unlock(struct hwspinlock *lock)
 	writel(STM32_MUTEX_COREID, lock_addr);
 }
 
+static void stm32_hwspinlock_relax(struct hwspinlock *lock)
+{
+	ndelay(50);
+}
+
 static const struct hwspinlock_ops stm32_hwspinlock_ops = {
 	.trylock	= stm32_hwspinlock_trylock,
 	.unlock		= stm32_hwspinlock_unlock,
+	.relax		= stm32_hwspinlock_relax,
 };
 
 static int stm32_hwspinlock_probe(struct platform_device *pdev)
-- 
2.7.4


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             reply	other threads:[~2019-03-07 15:42 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-07 15:42 Fabien Dessenne [this message]
2019-03-07 15:42 ` [PATCH] hwspinlock: stm32: implement the relax() ops Fabien Dessenne
2019-03-07 15:42 ` Fabien Dessenne
2019-03-08 12:42 ` Benjamin Gaignard
2019-03-08 12:42   ` Benjamin Gaignard
2019-05-13  9:07   ` Fabien DESSENNE
2019-05-13  9:07     ` Fabien DESSENNE
2019-05-13  9:07     ` Fabien DESSENNE
2019-06-30  4:05 ` Bjorn Andersson
2019-06-30  4:05   ` Bjorn Andersson

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