diff options
Diffstat (limited to 'drivers/mfd/tc3589x.c')
| -rw-r--r-- | drivers/mfd/tc3589x.c | 131 |
1 files changed, 123 insertions, 8 deletions
diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index de979742c6f..0e79fe2d214 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -358,16 +358,114 @@ static int __devexit tc3589x_remove(struct i2c_client *client) } #ifdef CONFIG_PM + +static u32 sleep_regs[] = { + TC3589x_IOPC0_L, + TC3589x_IOPC0_H, + TC3589x_IOPC1_L, + TC3589x_IOPC1_H, + TC3589x_IOPC2_L, + TC3589x_IOPC2_H, + TC3589x_DRIVE0_L, + TC3589x_DRIVE0_H, + TC3589x_DRIVE1_L, + TC3589x_DRIVE1_H, + TC3589x_DRIVE2_L, + TC3589x_DRIVE2_H, + TC3589x_DRIVE3, + TC3589x_GPIODATA0, + TC3589x_GPIOMASK0, + TC3589x_GPIODATA1, + TC3589x_GPIOMASK1, + TC3589x_GPIODATA2, + TC3589x_GPIOMASK2, + TC3589x_GPIODIR0, + TC3589x_GPIODIR1, + TC3589x_GPIODIR2, + TC3589x_GPIOIE0, + TC3589x_GPIOIE1, + TC3589x_GPIOIE2, + TC3589x_RSTCTRL, + TC3589x_CLKCFG, +}; + +static u8 sleep_regs_val[] = { + 0x00, /* TC3589x_IOPC0_L */ + 0x00, /* TC3589x_IOPC0_H */ + 0x00, /* TC3589x_IOPC1_L */ + 0x00, /* TC3589x_IOPC1_H */ + 0x00, /* TC3589x_IOPC2_L */ + 0x00, /* TC3589x_IOPC2_H */ + 0xff, /* TC3589x_DRIVE0_L */ + 0xff, /* TC3589x_DRIVE0_H */ + 0xff, /* TC3589x_DRIVE1_L */ + 0xff, /* TC3589x_DRIVE1_H */ + 0xff, /* TC3589x_DRIVE2_L */ + 0xff, /* TC3589x_DRIVE2_H */ + 0x0f, /* TC3589x_DRIVE3 */ + 0x80, /* TC3589x_GPIODATA0 */ + 0x80, /* TC3589x_GPIOMASK0 */ + 0x80, /* TC3589x_GPIODATA1 */ + 0x80, /* TC3589x_GPIOMASK1 */ + 0x06, /* TC3589x_GPIODATA2 */ + 0x06, /* TC3589x_GPIOMASK2 */ + 0xf0, /* TC3589x_GPIODIR0 */ + 0xe0, /* TC3589x_GPIODIR1 */ + 0xee, /* TC3589x_GPIODIR2 */ + 0x0f, /* TC3589x_GPIOIE0 */ + 0x1f, /* TC3589x_GPIOIE1 */ + 0x11, /* TC3589x_GPIOIE2 */ + 0x0f, /* TC3589x_RSTCTRL */ + 0xb0 /* TC3589x_CLKCFG */ + +}; + +static u8 sleep_regs_backup[ARRAY_SIZE(sleep_regs)]; + static int tc3589x_suspend(struct device *dev) { struct tc3589x *tc3589x = dev_get_drvdata(dev); struct i2c_client *client = tc3589x->i2c; int ret = 0; + int i, j; + int val; + + /* Put the system to sleep mode */ + if (!device_may_wakeup(&client->dev)) { + for (i = 0; i < ARRAY_SIZE(sleep_regs); i++) { + val = tc3589x_reg_read(tc3589x, + sleep_regs[i]); + if (val < 0) + goto out; + + sleep_regs_backup[i] = (u8) (val & 0xff); + } - /* put the system to sleep mode */ - if (!device_may_wakeup(&client->dev)) - ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE, - TC3589x_CLKMODE_MODCTL_SLEEP); + for (i = 0; i < ARRAY_SIZE(sleep_regs); i++) { + ret = tc3589x_reg_write(tc3589x, + sleep_regs[i], + sleep_regs_val[i]); + if (ret < 0) + goto fail; + + } + + ret = tc3589x_reg_write(tc3589x, + TC3589x_CLKMODE, + TC3589x_CLKMODE_MODCTL_SLEEP); + } else { + enable_irq_wake(client->irq); + } +out: + return ret; +fail: + for (j = 0; j <= i; j++) { + ret = tc3589x_reg_write(tc3589x, + sleep_regs[i], + sleep_regs_backup[i]); + if (ret < 0) + break; + } return ret; } @@ -377,12 +475,29 @@ static int tc3589x_resume(struct device *dev) struct tc3589x *tc3589x = dev_get_drvdata(dev); struct i2c_client *client = tc3589x->i2c; int ret = 0; + int i; - /* enable the system into operation */ + /* Enable the system into operation */ if (!device_may_wakeup(&client->dev)) - ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE, - TC3589x_CLKMODE_MODCTL_OPERATION); - + { + ret = tc3589x_reg_write(tc3589x, + TC3589x_CLKMODE, + TC3589x_CLKMODE_MODCTL_OPERATION); + if (ret < 0) + goto out; + + for (i = ARRAY_SIZE(sleep_regs) - 1; i >= 0; i--) { + ret = tc3589x_reg_write(tc3589x, + sleep_regs[i], + sleep_regs_backup[i]); + /* Not much to do here if we fail */ + if (ret < 0) + break; + } + } else { + disable_irq_wake(client->irq); + } +out: return ret; } |