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Commit 379749c4 authored by Lee Jones's avatar Lee Jones
Browse files

mfd: ab8500-sysctrl: Provide a platform specific pm_power_off() call-back 



The kernel allows us to specify a function call-back which will be
invoked when a system power-off request has been received. Here we
provide one which is to be used when shutting down AB8500 based
platforms.

Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 949db153

drivers/mfd/ab8500-sysctrl.c

+22 −0
Original line number Diff line number Diff line
@@ -7,12 +7,29 @@ 
#include <linux/err.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm.h>

#include <linux/signal.h>

#include <linux/mfd/abx500.h>

#include <linux/mfd/abx500/ab8500.h>

#include <linux/mfd/abx500/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) ||
@@ -51,7 +68,12 @@ int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value) 


static int 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;

}

include/linux/mfd/abx500/ab8500.h

+2 −0
Original line number Diff line number Diff line
@@ -274,6 +274,7 @@ struct ab8500_codec_platform_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

 * @num_regulator_reg_init: number of regulator init registers

 * @regulator_reg_init: regulator init registers
@@ -282,6 +283,7 @@ struct ab8500_codec_platform_data; 
 */

struct ab8500_platform_data {

	int irq_base;

	bool pm_power_off;

	void (*init) (struct ab8500 *);

	int num_regulator_reg_init;

	struct ab8500_regulator_reg_init *regulator_reg_init;