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Date: Fri, 3 Dec 2010 20:35:46 +0530 From: Sundar Iyer <sundar.iyer@...ricsson.com> To: <linux-arm-kernel@...ts.infradead.org>, <dmitry.torokhov@...il.com>, <sameo@...ux.intel.com>, <ben-linux@...ff.org> Cc: <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Sundar Iyer <sundar.iyer@...ricsson.com> Subject: [PATCH 13/20] mfd/tc3589x: add suspend/resume support Signed-off-by: Sundar Iyer <sundar.iyer@...ricsson.com> --- drivers/mfd/tc3589x.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 42 insertions(+), 0 deletions(-) diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index fd206fd..a7dd2b6 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -14,6 +14,9 @@ #include <linux/mfd/core.h> #include <linux/mfd/tc3589x.h> +#define TC3589x_CLKMODE_MODCTL_SLEEP 0x0 +#define TC3589x_CLKMODE_MODCTL_OPERATION (1 << 0) + /** * tc3589x_reg_read() - read a single TC3589x register * @tc3589x: Device to read from @@ -365,6 +368,42 @@ static int __devexit tc3589x_remove(struct i2c_client *client) return 0; } +#ifdef CONFIG_PM +static int tc3589x_suspend(struct device *dev) +{ + struct tc3589x *tc35892 = dev_get_drvdata(dev); + struct i2c_client *client = tc3589x->i2c; + int ret = 0; + + /* put the system to sleep mode */ + if (!device_may_wakeup(&client->dev)) + ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE, + TC3589x_CLKMODE_MODCTL_SLEEP); + + return ret; +} + +static int tc3589x_resume(struct device *dev) +{ + struct tc3589x *tc3589x = dev_get_drvdata(dev); + struct i2c_client *client = tc3589x->i2c; + int ret = 0; + + /* enable the system into operation */ + if (!device_may_wakeup(&client->dev)) + ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE, + TC3589x_CLKMODE_MODCTL_OPERATION); + + return ret; +} + + +static const struct dev_pm_ops tc3589x_dev_pm_ops = { + .suspend = tc3589x_suspend, + .resume = tc3589x_resume, +}; +#endif + static const struct i2c_device_id tc3589x_id[] = { { "tc3589x", 24 }, { } @@ -374,6 +413,9 @@ MODULE_DEVICE_TABLE(i2c, tc3589x_id); static struct i2c_driver tc3589x_driver = { .driver.name = "tc3589x", .driver.owner = THIS_MODULE, +#ifdef CONFIG_PM + .driver.pm = &tc3589x_dev_pm_ops, +#endif .probe = tc3589x_probe, .remove = __devexit_p(tc3589x_remove), .id_table = tc3589x_id, -- 1.7.2.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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