* [PATCH v2] spi/fsl-espi: Add Power Management support for eSPI controller
@ 2013-12-12 4:53 ` Hou Zhiqiang
0 siblings, 0 replies; 4+ messages in thread
From: Hou Zhiqiang @ 2013-12-12 4:53 UTC (permalink / raw)
To: linux-spi-u79uwXL29TY76Z2rM5mHXA, linuxppc-dev-mnsaURCQ41sdnm+yROfE0A
Cc: broonie-DgEjT+Ai2ygdnm+yROfE0A,
grant.likely-s3s/WqlpOiPyB63q8FvJNQ,
scottwood-KZfg59tc24xl57MIdRCFDg,
Mingkai.Hu-KZfg59tc24xl57MIdRCFDg, Hou Zhiqiang
Add PM support for eSPI controller using callback function suspend
and resume in .driver.pm of platform_driver.
Signed-off-by: Hou Zhiqiang <b48286-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
---
v2:
- Replace .driver.suspend and .driver.resume with .driver.pm
- Use CONFIG_PM_SLEEP instead of CONFIG_PM
- Add spi_master_suspend and spi_master_resume
drivers/spi/spi-fsl-espi.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 8106006..428dc7a 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -727,6 +727,66 @@ static int of_fsl_espi_remove(struct platform_device *dev)
return mpc8xxx_spi_remove(&dev->dev);
}
+#ifdef CONFIG_PM_SLEEP
+static int of_fsl_espi_suspend(struct device *dev)
+{
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct mpc8xxx_spi *mpc8xxx_spi;
+ struct fsl_espi_reg *reg_base;
+ u32 regval;
+ int ret;
+
+ mpc8xxx_spi = spi_master_get_devdata(master);
+ reg_base = mpc8xxx_spi->reg_base;
+
+ ret = spi_master_suspend(master);
+ if (ret) {
+ dev_warn(dev, "cannot suspend master\n");
+ return ret;
+ }
+
+ regval = mpc8xxx_spi_read_reg(®_base->mode);
+ regval &= ~SPMODE_ENABLE;
+ mpc8xxx_spi_write_reg(®_base->mode, regval);
+
+ return 0;
+}
+
+static int of_fsl_espi_resume(struct device *dev)
+{
+ struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct mpc8xxx_spi *mpc8xxx_spi;
+ struct fsl_espi_reg *reg_base;
+ u32 regval;
+ int i;
+
+ mpc8xxx_spi = spi_master_get_devdata(master);
+ reg_base = mpc8xxx_spi->reg_base;
+
+ /* SPI controller initializations */
+ mpc8xxx_spi_write_reg(®_base->mode, 0);
+ mpc8xxx_spi_write_reg(®_base->mask, 0);
+ mpc8xxx_spi_write_reg(®_base->command, 0);
+ mpc8xxx_spi_write_reg(®_base->event, 0xffffffff);
+
+ /* Init eSPI CS mode register */
+ for (i = 0; i < pdata->max_chipselect; i++)
+ mpc8xxx_spi_write_reg(®_base->csmode[i], CSMODE_INIT_VAL);
+
+ /* Enable SPI interface */
+ regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE;
+
+ mpc8xxx_spi_write_reg(®_base->mode, regval);
+
+ return spi_master_resume(master);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops espi_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(of_fsl_espi_suspend, of_fsl_espi_resume)
+};
+
static const struct of_device_id of_fsl_espi_match[] = {
{ .compatible = "fsl,mpc8536-espi" },
{}
@@ -738,6 +798,7 @@ static struct platform_driver fsl_espi_driver = {
.name = "fsl_espi",
.owner = THIS_MODULE,
.of_match_table = of_fsl_espi_match,
+ .pm = &espi_pm,
},
.probe = of_fsl_espi_probe,
.remove = of_fsl_espi_remove,
--
1.8.4.1
--
To unsubscribe from this list: send the line "unsubscribe linux-spi" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v2] spi/fsl-espi: Add Power Management support for eSPI controller
@ 2013-12-12 4:53 ` Hou Zhiqiang
0 siblings, 0 replies; 4+ messages in thread
From: Hou Zhiqiang @ 2013-12-12 4:53 UTC (permalink / raw)
To: linux-spi, linuxppc-dev; +Cc: scottwood, Mingkai.Hu, broonie, Hou Zhiqiang
Add PM support for eSPI controller using callback function suspend
and resume in .driver.pm of platform_driver.
Signed-off-by: Hou Zhiqiang <b48286@freescale.com>
---
v2:
- Replace .driver.suspend and .driver.resume with .driver.pm
- Use CONFIG_PM_SLEEP instead of CONFIG_PM
- Add spi_master_suspend and spi_master_resume
drivers/spi/spi-fsl-espi.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 8106006..428dc7a 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -727,6 +727,66 @@ static int of_fsl_espi_remove(struct platform_device *dev)
return mpc8xxx_spi_remove(&dev->dev);
}
+#ifdef CONFIG_PM_SLEEP
+static int of_fsl_espi_suspend(struct device *dev)
+{
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct mpc8xxx_spi *mpc8xxx_spi;
+ struct fsl_espi_reg *reg_base;
+ u32 regval;
+ int ret;
+
+ mpc8xxx_spi = spi_master_get_devdata(master);
+ reg_base = mpc8xxx_spi->reg_base;
+
+ ret = spi_master_suspend(master);
+ if (ret) {
+ dev_warn(dev, "cannot suspend master\n");
+ return ret;
+ }
+
+ regval = mpc8xxx_spi_read_reg(®_base->mode);
+ regval &= ~SPMODE_ENABLE;
+ mpc8xxx_spi_write_reg(®_base->mode, regval);
+
+ return 0;
+}
+
+static int of_fsl_espi_resume(struct device *dev)
+{
+ struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct mpc8xxx_spi *mpc8xxx_spi;
+ struct fsl_espi_reg *reg_base;
+ u32 regval;
+ int i;
+
+ mpc8xxx_spi = spi_master_get_devdata(master);
+ reg_base = mpc8xxx_spi->reg_base;
+
+ /* SPI controller initializations */
+ mpc8xxx_spi_write_reg(®_base->mode, 0);
+ mpc8xxx_spi_write_reg(®_base->mask, 0);
+ mpc8xxx_spi_write_reg(®_base->command, 0);
+ mpc8xxx_spi_write_reg(®_base->event, 0xffffffff);
+
+ /* Init eSPI CS mode register */
+ for (i = 0; i < pdata->max_chipselect; i++)
+ mpc8xxx_spi_write_reg(®_base->csmode[i], CSMODE_INIT_VAL);
+
+ /* Enable SPI interface */
+ regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE;
+
+ mpc8xxx_spi_write_reg(®_base->mode, regval);
+
+ return spi_master_resume(master);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops espi_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(of_fsl_espi_suspend, of_fsl_espi_resume)
+};
+
static const struct of_device_id of_fsl_espi_match[] = {
{ .compatible = "fsl,mpc8536-espi" },
{}
@@ -738,6 +798,7 @@ static struct platform_driver fsl_espi_driver = {
.name = "fsl_espi",
.owner = THIS_MODULE,
.of_match_table = of_fsl_espi_match,
+ .pm = &espi_pm,
},
.probe = of_fsl_espi_probe,
.remove = of_fsl_espi_remove,
--
1.8.4.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2] spi/fsl-espi: Add Power Management support for eSPI controller
2013-12-12 4:53 ` Hou Zhiqiang
@ 2013-12-12 11:56 ` Mark Brown
-1 siblings, 0 replies; 4+ messages in thread
From: Mark Brown @ 2013-12-12 11:56 UTC (permalink / raw)
To: Hou Zhiqiang
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA,
linuxppc-dev-mnsaURCQ41sdnm+yROfE0A,
grant.likely-s3s/WqlpOiPyB63q8FvJNQ,
scottwood-KZfg59tc24xl57MIdRCFDg,
Mingkai.Hu-KZfg59tc24xl57MIdRCFDg
[-- Attachment #1: Type: text/plain, Size: 196 bytes --]
On Thu, Dec 12, 2013 at 12:53:52PM +0800, Hou Zhiqiang wrote:
> Add PM support for eSPI controller using callback function suspend
> and resume in .driver.pm of platform_driver.
Applied, thanks.
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] spi/fsl-espi: Add Power Management support for eSPI controller
@ 2013-12-12 11:56 ` Mark Brown
0 siblings, 0 replies; 4+ messages in thread
From: Mark Brown @ 2013-12-12 11:56 UTC (permalink / raw)
To: Hou Zhiqiang; +Cc: linuxppc-dev, Mingkai.Hu, scottwood, linux-spi
[-- Attachment #1: Type: text/plain, Size: 196 bytes --]
On Thu, Dec 12, 2013 at 12:53:52PM +0800, Hou Zhiqiang wrote:
> Add PM support for eSPI controller using callback function suspend
> and resume in .driver.pm of platform_driver.
Applied, thanks.
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-12-12 11:56 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-12-12 4:53 [PATCH v2] spi/fsl-espi: Add Power Management support for eSPI controller Hou Zhiqiang
2013-12-12 4:53 ` Hou Zhiqiang
[not found] ` <1386824032-19198-1-git-send-email-b48286-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2013-12-12 11:56 ` Mark Brown
2013-12-12 11:56 ` Mark Brown
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.