* [PATCH 2/2] spi: spi-mem: stm32-qspi: add suspend/resume support
@ 2019-03-08 13:12 ` Ludovic Barre
0 siblings, 0 replies; 20+ messages in thread
From: Ludovic Barre @ 2019-03-08 13:12 UTC (permalink / raw)
To: Mark Brown, Marek Vasut, Boris Brezillon, Rob Herring
Cc: devicetree, Alexandre Torgue, linux-kernel, linux-spi, linux-mtd,
Ludovic Barre, Maxime Coquelin, linux-stm32, linux-arm-kernel
From: Ludovic Barre <ludovic.barre@st.com>
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/spi/spi-stm32-qspi.c | 39 +++++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d..3e8ca10 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.7.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 20+ messages in thread* [PATCH 2/2] spi: spi-mem: stm32-qspi: add suspend/resume support
@ 2019-03-08 13:12 ` Ludovic Barre
0 siblings, 0 replies; 20+ messages in thread
From: Ludovic Barre @ 2019-03-08 13:12 UTC (permalink / raw)
To: Mark Brown, Marek Vasut, Boris Brezillon, Rob Herring
Cc: devicetree, Alexandre Torgue, linux-kernel, linux-spi, linux-mtd,
Ludovic Barre, Maxime Coquelin, linux-stm32, linux-arm-kernel
From: Ludovic Barre <ludovic.barre@st.com>
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/spi/spi-stm32-qspi.c | 39 +++++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d..3e8ca10 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.7.4
______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
^ permalink raw reply related [flat|nested] 20+ messages in thread* [PATCH 2/2] spi: spi-mem: stm32-qspi: add suspend/resume support
@ 2019-03-08 13:12 ` Ludovic Barre
0 siblings, 0 replies; 20+ messages in thread
From: Ludovic Barre @ 2019-03-08 13:12 UTC (permalink / raw)
To: Mark Brown, Marek Vasut, Boris Brezillon, Rob Herring
Cc: Maxime Coquelin, Alexandre Torgue, linux-mtd, linux-spi,
linux-arm-kernel, linux-kernel, linux-stm32, devicetree,
Ludovic Barre
From: Ludovic Barre <ludovic.barre@st.com>
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/spi/spi-stm32-qspi.c | 39 +++++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d..3e8ca10 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.7.4
^ permalink raw reply related [flat|nested] 20+ messages in thread* Applied "spi: spi-mem: stm32-qspi: add suspend/resume support" to the spi tree
2019-03-08 13:12 ` Ludovic Barre
(?)
(?)
@ 2019-03-15 17:19 ` Mark Brown
-1 siblings, 0 replies; 20+ messages in thread
From: Mark Brown @ 2019-03-15 17:19 UTC (permalink / raw)
To: Ludovic Barre
Cc: Mark Brown, Mark Brown, Marek Vasut, Boris Brezillon,
Rob Herring, Maxime Coquelin, Alexandre Torgue, linux-mtd,
linux-spi, linux-arm-kernel, linux-kernel, linux-stm32,
devicetree, linux-spi
The patch
spi: spi-mem: stm32-qspi: add suspend/resume support
has been applied to the spi tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
From 2e541b64ee5269278fde5c87953a9963a8219ed4 Mon Sep 17 00:00:00 2001
From: Ludovic Barre <ludovic.barre@st.com>
Date: Fri, 8 Mar 2019 14:12:21 +0100
Subject: [PATCH] spi: spi-mem: stm32-qspi: add suspend/resume support
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/spi/spi-stm32-qspi.c | 39 ++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d68dba..3e8ca10011cc 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.20.1
^ permalink raw reply related [flat|nested] 20+ messages in thread* Applied "spi: spi-mem: stm32-qspi: add suspend/resume support" to the spi tree
@ 2019-03-15 17:19 ` Mark Brown
0 siblings, 0 replies; 20+ messages in thread
From: Mark Brown @ 2019-03-15 17:19 UTC (permalink / raw)
To: Ludovic Barre
Cc: devicetree, Alexandre Torgue, Boris Brezillon, linux-kernel,
Rob Herring, linux-spi, Marek Vasut, Mark Brown, linux-mtd,
Maxime Coquelin, linux-stm32, linux-arm-kernel
The patch
spi: spi-mem: stm32-qspi: add suspend/resume support
has been applied to the spi tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
From 2e541b64ee5269278fde5c87953a9963a8219ed4 Mon Sep 17 00:00:00 2001
From: Ludovic Barre <ludovic.barre@st.com>
Date: Fri, 8 Mar 2019 14:12:21 +0100
Subject: [PATCH] spi: spi-mem: stm32-qspi: add suspend/resume support
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/spi/spi-stm32-qspi.c | 39 ++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d68dba..3e8ca10011cc 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.20.1
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linux-arm-kernel mailing list
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^ permalink raw reply related [flat|nested] 20+ messages in thread* Applied "spi: spi-mem: stm32-qspi: add suspend/resume support" to the spi tree
@ 2019-03-15 17:19 ` Mark Brown
0 siblings, 0 replies; 20+ messages in thread
From: Mark Brown @ 2019-03-15 17:19 UTC (permalink / raw)
To: Ludovic Barre
Cc: devicetree, Alexandre Torgue, Boris Brezillon, linux-kernel,
Rob Herring, linux-spi, Marek Vasut, Mark Brown, linux-mtd,
Maxime Coquelin, linux-stm32, linux-arm-kernel
The patch
spi: spi-mem: stm32-qspi: add suspend/resume support
has been applied to the spi tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
From 2e541b64ee5269278fde5c87953a9963a8219ed4 Mon Sep 17 00:00:00 2001
From: Ludovic Barre <ludovic.barre@st.com>
Date: Fri, 8 Mar 2019 14:12:21 +0100
Subject: [PATCH] spi: spi-mem: stm32-qspi: add suspend/resume support
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/spi/spi-stm32-qspi.c | 39 ++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d68dba..3e8ca10011cc 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.20.1
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^ permalink raw reply related [flat|nested] 20+ messages in thread* Applied "spi: spi-mem: stm32-qspi: add suspend/resume support" to the spi tree
@ 2019-03-15 17:19 ` Mark Brown
0 siblings, 0 replies; 20+ messages in thread
From: Mark Brown @ 2019-03-15 17:19 UTC (permalink / raw)
To: Ludovic Barre
Cc: devicetree, Alexandre Torgue, Boris Brezillon, linux-kernel,
Rob Herring, linux-spi, Marek Vasut, Mark Brown, linux-mtd,
Maxime Coquelin, linux-stm32, linux-arm-kernel
The patch
spi: spi-mem: stm32-qspi: add suspend/resume support
has been applied to the spi tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
>From 2e541b64ee5269278fde5c87953a9963a8219ed4 Mon Sep 17 00:00:00 2001
From: Ludovic Barre <ludovic.barre@st.com>
Date: Fri, 8 Mar 2019 14:12:21 +0100
Subject: [PATCH] spi: spi-mem: stm32-qspi: add suspend/resume support
This patch adds suspend and resume support for spi-stm32-qspi
drivers.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/spi/spi-stm32-qspi.c | 39 ++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7354f9d68dba..3e8ca10011cc 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/sizes.h>
@@ -101,6 +102,9 @@ struct stm32_qspi {
struct completion data_completion;
u32 fmode;
+ u32 cr_reg;
+ u32 dcr_reg;
+
/*
* to protect device configuration, could be different between
* 2 flash access (bk1, bk2)
@@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
struct spi_controller *ctrl = spi->master;
struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl);
struct stm32_qspi_flash *flash;
- u32 cr, presc;
+ u32 presc;
if (ctrl->busy)
return -EBUSY;
@@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi)
flash->presc = presc;
mutex_lock(&qspi->lock);
- cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
- writel_relaxed(cr, qspi->io_base + QSPI_CR);
+ qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN;
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
/* set dcr fsize to max address */
- writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR);
+ qspi->dcr_reg = DCR_FSIZE_MASK;
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
mutex_unlock(&qspi->lock);
return 0;
@@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused stm32_qspi_suspend(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(qspi->clk);
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int __maybe_unused stm32_qspi_resume(struct device *dev)
+{
+ struct stm32_qspi *qspi = dev_get_drvdata(dev);
+
+ pinctrl_pm_select_default_state(dev);
+ clk_prepare_enable(qspi->clk);
+
+ writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
+ writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume);
+
static const struct of_device_id stm32_qspi_match[] = {
{.compatible = "st,stm32f469-qspi"},
{}
@@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = {
.driver = {
.name = "stm32-qspi",
.of_match_table = stm32_qspi_match,
+ .pm = &stm32_qspi_pm_ops,
},
};
module_platform_driver(stm32_qspi_driver);
--
2.20.1
^ permalink raw reply related [flat|nested] 20+ messages in thread