From mboxrd@z Thu Jan 1 00:00:00 1970 From: o.rempel@pengutronix.de (Oleksij Rempel) Date: Mon, 30 Jul 2018 09:50:55 +0200 Subject: [PATCH v8 5/6] regulator: pfuze100-regulator: provide pm_power_off_prepare handler In-Reply-To: References: <20180726092220.17250-1-o.rempel@pengutronix.de> <20180726092220.17250-6-o.rempel@pengutronix.de> Message-ID: <06313062-70db-9c10-048e-78ca267da959@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 27.07.2018 11:32, Robin Gong wrote: > > >> -----Original Message----- >> From: Oleksij Rempel [mailto:o.rempel at pengutronix.de] >> Sent: 2018?7?26? 17:22 >> To: Shawn Guo ; Mark Brown ; >> Rafael J. Wysocki >> Cc: Oleksij Rempel ; kernel at pengutronix.de; >> devicetree at vger.kernel.org; linux-arm-kernel at lists.infradead.org; >> linux-clk at vger.kernel.org; linux-kernel at vger.kernel.org; Andrew Morton >> ; Liam Girdwood ; >> Leonard Crestez ; Rob Herring >> ; Mark Rutland ; Michael >> Turquette ; Stephen Boyd >> ; Fabio Estevam ; Russell >> King ; dl-linux-imx ; Robin Gong >> ; A.s. Dong >> 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 >> --- >> 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 >> #include >> #include >> +#include > Is it necessary? yes, for pm_power_off_prepare >> #include >> >> #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 > -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 488 bytes Desc: OpenPGP digital signature URL: