On 27.07.2018 11:32, Robin Gong wrote: > > >> -----Original Message----- >> From: Oleksij Rempel [mailto:[email protected]] >> Sent: 2018年7月26日 17:22 >> To: Shawn Guo <[email protected]>; Mark Brown <[email protected]>; >> Rafael J. Wysocki <[email protected]> >> Cc: Oleksij Rempel <[email protected]>; [email protected]; >> [email protected]; [email protected]; >> [email protected]; [email protected]; Andrew Morton >> <[email protected]>; Liam Girdwood <[email protected]>; >> Leonard Crestez <[email protected]>; Rob Herring >> <[email protected]>; Mark Rutland <[email protected]>; Michael >> Turquette <[email protected]>; Stephen Boyd >> <[email protected]>; Fabio Estevam <[email protected]>; Russell >> King <[email protected]>; dl-linux-imx <[email protected]>; Robin Gong >> <[email protected]>; A.s. Dong <[email protected]> >> Subject: [PATCH v8 5/6] regulator: pfuze100-regulator: provide >> pm_power_off_prepare handler >> >> On some boards the SoC can use one pin "PMIC_STBY_REQ" to notify th PMIC >> about state changes. In this case internal state of PMIC must be >> preconfigured >> for upcomming state change. >> It works fine with the current regulator framework, except with the power-off >> case. >> >> This patch is providing an optional pm_power_off_prepare handler which will >> configure standby state of the PMIC to disable all power lines. >> >> In my power consumption test on RIoTBoard, I got the following results: >> power off without this patch: 320 mA >> power off with this patch: 2 mA >> suspend to ram: 40 mA >> >> Signed-off-by: Oleksij Rempel <[email protected]> >> --- >> drivers/regulator/pfuze100-regulator.c | 92 ++++++++++++++++++++++++++ >> 1 file changed, 92 insertions(+) >> >> diff --git a/drivers/regulator/pfuze100-regulator.c >> b/drivers/regulator/pfuze100-regulator.c >> index 8d9dbcc775ea..e386e9acb3f7 100644 >> --- a/drivers/regulator/pfuze100-regulator.c >> +++ b/drivers/regulator/pfuze100-regulator.c >> @@ -15,6 +15,7 @@ >> #include <linux/regulator/pfuze100.h> >> #include <linux/i2c.h> >> #include <linux/slab.h> >> +#include <linux/kallsyms.h> > Is it necessary?
yes, for pm_power_off_prepare
>> #include <linux/regmap.h>
>>
>> #define PFUZE_NUMREGS 128
>> @@ -29,11 +30,17 @@
>>
>> #define PFUZE100_COINVOL 0x1a
>> #define PFUZE100_SW1ABVOL 0x20
>> +#define PFUZE100_SW1ABMODE 0x23
>> #define PFUZE100_SW1CVOL 0x2e
>> +#define PFUZE100_SW1CMODE 0x31
>> #define PFUZE100_SW2VOL 0x35
>> +#define PFUZE100_SW2MODE 0x38
>> #define PFUZE100_SW3AVOL 0x3c
>> +#define PFUZE100_SW3AMODE 0x3f
>> #define PFUZE100_SW3BVOL 0x43
>> +#define PFUZE100_SW3BMODE 0x46
>> #define PFUZE100_SW4VOL 0x4a
>> +#define PFUZE100_SW4MODE 0x4d
>> #define PFUZE100_SWBSTCON1 0x66
>> #define PFUZE100_VREFDDRCON 0x6a
>> #define PFUZE100_VSNVSVOL 0x6b
>> @@ -44,6 +51,13 @@
>> #define PFUZE100_VGEN5VOL 0x70
>> #define PFUZE100_VGEN6VOL 0x71
>>
>> +#define PFUZE100_SWxMODE_MASK 0xf
>> +#define PFUZE100_SWxMODE_APS_APS 0x8
>> +#define PFUZE100_SWxMODE_APS_OFF 0x4
>> +
>> +#define PFUZE100_VGENxLPWR BIT(6)
>> +#define PFUZE100_VGENxSTBY BIT(5)
>> +
>> enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3 };
>>
>> struct pfuze_regulator {
>> @@ -492,6 +506,69 @@ static inline struct device_node *match_of_node(int
>> index) } #endif
>>
>> +static struct pfuze_chip *syspm_pfuze_chip;
>> +
>> +static void pfuze_power_off_prepare(void)
>> + dev_info(syspm_pfuze_chip->dev, "Configure standy mode for power
>> +off");
> Add 'if (syspm_pfuze_chip ->chip_id == PFUZE100))' here is easy for extend
> Support on pfuze200/3000.. in the feature.
ok.
>> +
>> + /* Switch from default mode: APS/APS to APS/Off */
>> + regmap_update_bits(syspm_pfuze_chip->regmap,
>> PFUZE100_SW1ABMODE,
>> + PFUZE100_SWxMODE_MASK,
>> PFUZE100_SWxMODE_APS_OFF);
>> + regmap_update_bits(syspm_pfuze_chip->regmap,
>> PFUZE100_SW1CMODE,
>> + PFUZE100_SWxMODE_MASK,
>> PFUZE100_SWxMODE_APS_OFF);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW2MODE,
>> + PFUZE100_SWxMODE_MASK,
>> PFUZE100_SWxMODE_APS_OFF);
>> + regmap_update_bits(syspm_pfuze_chip->regmap,
>> PFUZE100_SW3AMODE,
>> + PFUZE100_SWxMODE_MASK,
>> PFUZE100_SWxMODE_APS_OFF);
>> + regmap_update_bits(syspm_pfuze_chip->regmap,
>> PFUZE100_SW3BMODE,
>> + PFUZE100_SWxMODE_MASK,
>> PFUZE100_SWxMODE_APS_OFF);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW4MODE,
>> + PFUZE100_SWxMODE_MASK,
>> PFUZE100_SWxMODE_APS_OFF);
>> +
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN1VOL,
>> + PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
>> + PFUZE100_VGENxSTBY);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN2VOL,
>> + PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
>> + PFUZE100_VGENxSTBY);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN3VOL,
>> + PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
>> + PFUZE100_VGENxSTBY);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN4VOL,
>> + PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
>> + PFUZE100_VGENxSTBY);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN5VOL,
>> + PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
>> + PFUZE100_VGENxSTBY);
>> + regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN6VOL,
>> + PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
>> + PFUZE100_VGENxSTBY);
>> +}
>> +
>> +static int pfuze_power_off_prepare_init(struct pfuze_chip *pfuze_chip)
>> +{
>> + if (pfuze_chip->chip_id != PFUZE100) {
>> + dev_warn(pfuze_chip->dev, "Requested pm_power_off_prepare
>> handler for not supported chip\n");
>> + return -ENODEV;
>> + }
>> +
>> + if (pm_power_off_prepare) {
>> + dev_warn(pfuze_chip->dev, "pm_power_off_prepare is already
>> registered.\n");
>> + return -EBUSY;
>> + }
>> +
>> + if (syspm_pfuze_chip) {
>> + dev_warn(pfuze_chip->dev, "syspm_pfuze_chip is already set.\n");
>> + return -EBUSY;
>> + }
>> +
>> + syspm_pfuze_chip = pfuze_chip;
>> + pm_power_off_prepare = pfuze_power_off_prepare;
>> +
>> + return 0;
>> +}
>> +
>> static int pfuze_identify(struct pfuze_chip *pfuze_chip) {
>> unsigned int value;
>> @@ -661,6 +738,20 @@ static int pfuze100_regulator_probe(struct i2c_client
>> *client,
>> }
>> }
>>
>> + if (of_property_read_bool(client->dev.of_node,
>> + "fsl,pmic-stby-poweroff"))
>> + return pfuze_power_off_prepare_init(pfuze_chip);
>> +
>> + return 0;
>> +}
>> +
>> +static int pfuze100_regulator_remove(struct i2c_client *client) {
>> + if (syspm_pfuze_chip) {
>> + syspm_pfuze_chip = NULL;
>> + pm_power_off_prepare = NULL;
>> + }
>> +
>> return 0;
>> }
>>
>> @@ -671,6 +762,7 @@ static struct i2c_driver pfuze_driver = {
>> .of_match_table = pfuze_dt_ids,
>> },
>> .probe = pfuze100_regulator_probe,
>> + .remove = pfuze100_regulator_remove,
>> };
>> module_i2c_driver(pfuze_driver);
>>
>> --
>> 2.18.0
>
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