[PATCH 1/7] arm: imx: power-off: change to syscon to access register
From: Frank.Li at freescale.com <hidden>
Date: 2015-05-14 17:18:47
Also in:
linux-devicetree, linux-input, linux-pm, linux-rtc
Subsystem:
system reset/shutdown drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
From: Frank Li <redacted> snvs is MFP device, which included rtc, ON/OFF key, power off Signed-off-by: Frank Li <redacted> --- 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