[PATCH V2 5/6] power: reset: change xgene reboot driver to use both acpi and dts resource for reboot.

Feng Kan
2014-01-07T22:51:29Z

Enable the X-Gene reboot driver to use either the ACPI or the DTS
resource using the platform driver method.

Signed-off-by: Feng Kan <fkan@apm.com>
---
drivers/power/reset/xgene-reboot.c | 33 ++++++++++++++++++++++++++++-----
1 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c
index 683238c..e3223c2 100644
--- a/drivers/power/reset/xgene-reboot.c
+++ b/drivers/power/reset/xgene-reboot.c
@@ -30,6 +30,8 @@
#include <linux/platform_device.h>
#include <linux/stat.h>
#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/efi.h>
#include <asm/system_misc.h>

struct xgene_reboot_context {
@@ -59,6 +61,14 @@ static void xgene_restart(enum reboot_mode reboot_mode, const char *cmd)
static int xgene_reboot_probe(struct platform_device *pdev)
{
struct xgene_reboot_context *ctx;
+ struct resource *res;
+ int rc;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no resource address\n");
+ return -ENODEV;
+ }

ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx) {
@@ -66,20 +76,27 @@ static int xgene_reboot_probe(struct platform_device *pdev)
return -ENODEV;
}

- ctx->csr = of_iomap(pdev->dev.of_node, 0);
+ ctx->csr = devm_ioremap_resource(&pdev->dev, res);
if (!ctx->csr) {
- devm_kfree(&pdev->dev, ctx);
- dev_err(&pdev->dev, "can not map resource\n");
- return -ENODEV;
+ dev_err(&pdev->dev, "can't map CSR resource\n");
+ rc = -ENOMEM;
+ goto error;
}

ctx->mask = 0x1;

+ dev_info(&pdev->dev, "X-Gene register reboot driver\n");
+
ctx->pdev = pdev;
arm_pm_restart = xgene_restart;
xgene_restart_ctx = ctx;
-
return 0;
+
+error:
+ if (ctx->csr)
+ devm_iounmap(&pdev->dev, ctx->csr);
+ devm_kfree(&pdev->dev, ctx);
+ return rc;
}

static struct of_device_id xgene_reboot_of_match[] = {
@@ -87,11 +104,17 @@ static struct of_device_id xgene_reboot_of_match[] = {
{}
};

+static const struct acpi_device_id xgene_reset_acpi_ids[] = {
+ { "APMC0D08", 0 },
+ {}
+};
+
static struct platform_driver xgene_reboot_driver = {
.probe = xgene_reboot_probe,
.driver = {
.name = "xgene-reboot",
.of_match_table = xgene_reboot_of_match,
+ .acpi_match_table = ACPI_PTR(xgene_reset_acpi_ids),
},
};

--
1.7.6.1