diff mbox

[1/1] mtd: spi-nor: fsl-qspi: support DSM fro imx6 sx chip

Message ID 1421094288-24750-1-git-send-email-Frank.Li@freescale.com
State Accepted
Commit 45c6a0caeb2bde9e043bcd833af322db57a37498
Headers show

Commit Message

Frank Li Jan. 12, 2015, 8:24 p.m. UTC 
From: Allen Xu <b45815@freescale.com>

i.mx6 sx support turn off fastmix and megamix power.
qpsi controller status will lost when suspen/resume.
add suspend/resume functions and reset qspi controller
when resume.

Signed-off-by: Allen Xu <b45815@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
---
 drivers/mtd/spi-nor/fsl-quadspi.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

Comments

Brian Norris Jan. 12, 2015, 9:53 p.m. UTC | #1 
Regarding subject: "[PATCH 1/1] mtd: spi-nor: fsl-qspi: support DSM fro imx6 sx chip"

s/fro/for/

And, what is DSM?

Brian
Zhi Li Jan. 12, 2015, 9:55 p.m. UTC | #2 
On Mon, Jan 12, 2015 at 3:53 PM, Brian Norris
<computersforpeace@gmail.com> wrote:
> Regarding subject: "[PATCH 1/1] mtd: spi-nor: fsl-qspi: support DSM fro imx6 sx chip"
>
> s/fro/for/

Sorry for that.

>
> And, what is DSM?

Deep sleep mode.  QSPI controller power can be turned off during suspend.

>
> Brian
Brian Norris Jan. 12, 2015, 9:57 p.m. UTC | #3 
On Mon, Jan 12, 2015 at 03:55:05PM -0600, Zhi Li wrote:
> On Mon, Jan 12, 2015 at 3:53 PM, Brian Norris <computersforpeace@gmail.com> wrote:
> > And, what is DSM?
> 
> Deep sleep mode.  QSPI controller power can be turned off during suspend.

OK, please include that in version 2.

Brian
diff mbox

Patch

diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index 39763b9..9d608007 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -972,6 +972,22 @@  static int fsl_qspi_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int fsl_qspi_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	return 0;
+}
+
+static int fsl_qspi_resume(struct platform_device *pdev)
+{
+	struct fsl_qspi *q = platform_get_drvdata(pdev);
+
+	fsl_qspi_nor_setup(q);
+	fsl_qspi_set_map_addr(q);
+	fsl_qspi_nor_setup_last(q);
+
+	return 0;
+}
+
 static struct platform_driver fsl_qspi_driver = {
 	.driver = {
 		.name	= "fsl-quadspi",
@@ -980,6 +996,8 @@  static struct platform_driver fsl_qspi_driver = {
 	},
 	.probe          = fsl_qspi_probe,
 	.remove		= fsl_qspi_remove,
+	.suspend	= fsl_qspi_suspend,
+	.resume		= fsl_qspi_resume,
 };
 module_platform_driver(fsl_qspi_driver);