On Sun, 13 Sep 2015, Krzysztof Kozlowski wrote: > You acked this patch. However finally it did not go through other tree > so maybe you could pick it up for 4.4? > > If you want I could reabse and resend it. Yes, please rebase and resend. > 2015-08-11 19:09 GMT+09:00 Krzysztof Kozlowski <k.kozlowski.k@xxxxxxxxx>: > > > > On Odroid XU3 board (with S2MPS11 PMIC) the PWRHOLD bit in CTRL1 > > register must be manually set to 0 before initiating power off sequence. > > > > One of usual power down methods for Exynos based devices looks like: > > 1. PWRHOLD pin of PMIC is connected to PSHOLD of Exynos. > > 2. Exynos holds up this pin during system operation. > > 3. ACOKB pin of PMIC is pulled up to VBATT and optionally to pin in > > other device. > > 4. When PWRHOLD/PSHOLD goes low, the PMIC will turn off the power if > > ACOKB goes high. > > > > On Odroid XU3 family the difference is in (3) - the ACOKB is grounded. > > This means that PMIC must manually set PWRHOLD field to low and then > > wait for signal from Application Processor (the usual change in > > PWRHOLD/PSHOLD pin will actually cut off the power). > > > > The patch adds respective binding allowing Odroid XU3 device to be > > powered off. > > > > Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@xxxxxxxxx> > > Reported-by: Anand Moon <linux.amoon@xxxxxxxxx> > > Tested-by: Anand Moon <linux.amoon@xxxxxxxxx> > > Reviewed-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx> > > Acked-by: Lee Jones <lee.jones@xxxxxxxxxx> > > > > --- > > > > Changes since v1: > > 1. Split bindings documentation to separate patch (suggested by Lee). > > 2. Fix additional empty line (suggested by Lee). > > 3. Add Anand's tested-by, Javier's reviewed-by and Lee's acked-by. > > > > Patch is losely based on patch in Hardkernel repository [0] and previous > > work of Anand Moon [1]. > > > > [0] https://github.com/hardkernel/linux/commit/6897e62ba328bd1c8c095d918101863250cd73e7 > > [1] http://www.spinics.net/lists/linux-samsung-soc/msg45959.html > > --- > > drivers/mfd/sec-core.c | 30 ++++++++++++++++++++++++++++++ > > include/linux/mfd/samsung/core.h | 2 ++ > > include/linux/mfd/samsung/s2mps11.h | 1 + > > 3 files changed, 33 insertions(+) > > > > diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c > > index d206a3e8fe87..2d1137a7a0ee 100644 > > --- a/drivers/mfd/sec-core.c > > +++ b/drivers/mfd/sec-core.c > > @@ -278,6 +278,8 @@ static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( > > * not parsed here. > > */ > > > > + pd->manual_poweroff = of_property_read_bool(dev->of_node, > > + "samsung,s2mps11-acokb-ground"); > > return pd; > > } > > #else > > @@ -440,6 +442,33 @@ static int sec_pmic_remove(struct i2c_client *i2c) > > return 0; > > } > > > > +static void sec_pmic_shutdown(struct i2c_client *i2c) > > +{ > > + struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); > > + unsigned int reg, mask; > > + > > + if (!sec_pmic->pdata->manual_poweroff) > > + return; > > + > > + switch (sec_pmic->device_type) { > > + case S2MPS11X: > > + reg = S2MPS11_REG_CTRL1; > > + mask = S2MPS11_CTRL1_PWRHOLD_MASK; > > + break; > > + default: > > + /* > > + * Currently only one board with S2MPS11 needs this, so just > > + * ignore the rest. > > + */ > > + dev_warn(sec_pmic->dev, > > + "Unsupported device %lu for manual power off\n", > > + sec_pmic->device_type); > > + return; > > + } > > + > > + regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0); > > +} > > + > > #ifdef CONFIG_PM_SLEEP > > static int sec_pmic_suspend(struct device *dev) > > { > > @@ -491,6 +520,7 @@ static struct i2c_driver sec_pmic_driver = { > > }, > > .probe = sec_pmic_probe, > > .remove = sec_pmic_remove, > > + .shutdown = sec_pmic_shutdown, > > .id_table = sec_pmic_id, > > }; > > > > diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h > > index 75115384f3fc..aa78957e092f 100644 > > --- a/include/linux/mfd/samsung/core.h > > +++ b/include/linux/mfd/samsung/core.h > > @@ -132,6 +132,8 @@ struct sec_platform_data { > > int buck2_init; > > int buck3_init; > > int buck4_init; > > + /* Whether or not manually set PWRHOLD to low during shutdown. */ > > + bool manual_poweroff; > > }; > > > > /** > > diff --git a/include/linux/mfd/samsung/s2mps11.h b/include/linux/mfd/samsung/s2mps11.h > > index 7981a9d77d3f..b288965e8101 100644 > > --- a/include/linux/mfd/samsung/s2mps11.h > > +++ b/include/linux/mfd/samsung/s2mps11.h > > @@ -179,6 +179,7 @@ enum s2mps11_regulators { > > #define S2MPS11_BUCK_N_VOLTAGES (S2MPS11_BUCK_VSEL_MASK + 1) > > #define S2MPS11_RAMP_DELAY 25000 /* uV/us */ > > > > +#define S2MPS11_CTRL1_PWRHOLD_MASK BIT(4) > > > > #define S2MPS11_BUCK2_RAMP_SHIFT 6 > > #define S2MPS11_BUCK34_RAMP_SHIFT 4 > > -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
