[PATCH] MFD: pm poweroff moved to ab8500-sysctrl

[PATCH] MFD: pm poweroff moved to ab8500-sysctrl

[Mattias Wallin]

This patch moves the machine pm power off hook from the platform
code to the ab8500-sysctrl driver.

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/mfd/ab8500-sysctrl.c |   22 ++++++++++++++++++++++
 include/linux/mfd/ab8500.h   |    2 ++
 2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c
index 3921859..e6de6a2 100644
--- a/drivers/mfd/ab8500-sysctrl.c
+++ b/drivers/mfd/ab8500-sysctrl.c
@@ -6,12 +6,29 @@
 
 #include <linux/err.h>
 #include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/signal.h>
 #include <linux/mfd/ab8500.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/ab8500/sysctrl.h>
 
 static struct device *sysctrl_dev;
 
+void ab8500_power_off(void)
+{
+	sigset_t old;
+	sigset_t all;
+
+	sigfillset(&all);
+
+	if (!sigprocmask(SIG_BLOCK, &all, &old)) {
+		(void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
+					 AB8500_STW4500CTRL1_SWOFF |
+					 AB8500_STW4500CTRL1_SWRESET4500N);
+		(void)sigprocmask(SIG_SETMASK, &old, NULL);
+	}
+}
+
 static inline bool valid_bank(u8 bank)
 {
 	return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
@@ -50,7 +67,12 @@ int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
 
 static int __devinit ab8500_sysctrl_probe(struct platform_device *pdev)
 {
+	struct ab8500_platform_data *plat;
+
 	sysctrl_dev = &pdev->dev;
+	plat = dev_get_platdata(pdev->dev.parent);
+	if (plat->pm_power_off)
+		pm_power_off = ab8500_power_off;
 	return 0;
 }
 
diff --git a/include/linux/mfd/ab8500.h b/include/linux/mfd/ab8500.h
index 56f8dea..279f9f3 100644
--- a/include/linux/mfd/ab8500.h
+++ b/include/linux/mfd/ab8500.h
@@ -144,11 +144,13 @@ struct regulator_init_data;
 /**
  * struct ab8500_platform_data - AB8500 platform data
  * @irq_base: start of AB8500 IRQs, AB8500_NR_IRQS will be used
+ * @pm_power_off: Should machine pm power off hook be registered or not
  * @init: board-specific initialization after detection of ab8500
  * @regulator: machine-specific constraints for regulators
  */
 struct ab8500_platform_data {
 	int irq_base;
+	bool pm_power_off;
 	void (*init) (struct ab8500 *);
 	int num_regulator;
 	struct regulator_init_data *regulator;
-- 
1.7.4.1

Re: [PATCH] MFD: pm poweroff moved to ab8500-sysctrl

[Samuel Ortiz]

Hi Mattias,

On Wed, Mar 02, 2011 at 11:54:30AM +0100, Mattias Wallin wrote:
> This patch moves the machine pm power off hook from the platform
> code to the ab8500-sysctrl driver.
A couple questions:
- Where is the aforementioned platform code ? In LinusW tree ?
- I suppose you're moving it in the sysctrl driver to prevent the same routine
to be spread over several platforms. If that's the case, please mention it in
the changelog.

Cheers,
Samuel.

-- 
Intel Open Source Technology Centre
http://oss.intel.com/