[PATCH 1/7] arm: imx: power-off: change to syscon to access register

Frank.Li
2015-05-15T13:36:24Z

From: Frank Li <Frank.Li@freescale.com>

snvs is MFP device, which included rtc, ON/OFF key, power off

Signed-off-by: Frank Li <Frank.Li@freescale.com>
---
drivers/power/reset/imx-snvs-poweroff.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/power/reset/imx-snvs-poweroff.c b/drivers/power/reset/imx-snvs-poweroff.c
index ad6ce50..b4881d7 100644
--- a/drivers/power/reset/imx-snvs-poweroff.c
+++ b/drivers/power/reset/imx-snvs-poweroff.c
@@ -22,21 +22,30 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>

-static void __iomem *snvs_base;
+static struct regmap *snvs;
+
+#define SNVS_LPCR 0x38

static void do_imx_poweroff(void)
{
- u32 value = readl(snvs_base);
-
/* set TOP and DP_EN bit */
- writel(value | 0x60, snvs_base);
+ regmap_update_bits(snvs, SNVS_LPCR, 0x60, 0x60);
}

static int imx_poweroff_probe(struct platform_device *pdev)
{
- snvs_base = of_iomap(pdev->dev.of_node, 0);
- if (!snvs_base) {
+ struct device_node *nd;
+
+ nd = of_get_parent(pdev->dev.of_node);
+ if (!nd)
+ return -ENODEV;
+ snvs = syscon_node_to_regmap (nd);
+ of_node_put(nd);
+
+ if (!snvs) {
dev_err(&pdev->dev, "failed to get memory\n");
return -ENODEV;
}
--
1.9.1