Patchwork [3/7] powerpc/qe: Implement QE driver for handling resume on MPC85xx

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Submitter Anton Vorontsov
Date Sept. 15, 2009, 9:43 p.m.
Message ID <20090915214355.GC24821@oksana.dev.rtsoft.ru>
Download mbox | patch
Permalink /patch/33665/
State Accepted, archived
Commit fdfde24e108b49373f8702d5b9981217f35315d8
Delegated to: Kumar Gala
Headers show

Comments

Anton Vorontsov - Sept. 15, 2009, 9:43 p.m.
So far the driver is used to reset QE upon resume, which is needed on
85xx. Later we can move some QE initialization steps into probe().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
 arch/powerpc/sysdev/qe_lib/qe.c |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+), 0 deletions(-)
Kumar Gala - Nov. 5, 2009, 2:11 p.m.
On Sep 15, 2009, at 4:43 PM, Anton Vorontsov wrote:

> So far the driver is used to reset QE upon resume, which is needed on
> 85xx. Later we can move some QE initialization steps into probe().
>
> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
> ---
> arch/powerpc/sysdev/qe_lib/qe.c |   34 ++++++++++++++++++++++++++++++ 
> ++++
> 1 files changed, 34 insertions(+), 0 deletions(-)

applied to next

- k

Patch

diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index 4eaf2a9..149393c 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -27,6 +27,8 @@ 
 #include <linux/delay.h>
 #include <linux/ioport.h>
 #include <linux/crc32.h>
+#include <linux/mod_devicetable.h>
+#include <linux/of_platform.h>
 #include <asm/irq.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
@@ -647,3 +649,35 @@  unsigned int qe_get_num_of_snums(void)
 	return num_of_snums;
 }
 EXPORT_SYMBOL(qe_get_num_of_snums);
+
+#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC_85xx)
+static int qe_resume(struct of_device *ofdev)
+{
+	if (!qe_alive_during_sleep())
+		qe_reset();
+	return 0;
+}
+
+static int qe_probe(struct of_device *ofdev, const struct of_device_id *id)
+{
+	return 0;
+}
+
+static const struct of_device_id qe_ids[] = {
+	{ .compatible = "fsl,qe", },
+	{ },
+};
+
+static struct of_platform_driver qe_driver = {
+	.driver.name = "fsl-qe",
+	.match_table = qe_ids,
+	.probe = qe_probe,
+	.resume = qe_resume,
+};
+
+static int __init qe_drv_init(void)
+{
+	return of_register_platform_driver(&qe_driver);
+}
+device_initcall(qe_drv_init);
+#endif /* defined(CONFIG_SUSPEND) && defined(CONFIG_PPC_85xx) */