From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Thu, 9 Nov 2017 22:45:40 +0100 Subject: [PATCH] Add support for bq27521 battery monitor In-Reply-To: <20171109212945.2sgu56zkse7nbzo3@pali> References: <20171109210615.GA27638@amd> <20171109212945.2sgu56zkse7nbzo3@pali> Message-ID: <20171109214540.GB23376@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu 2017-11-09 22:29:45, Pali Roh?r wrote: > On Thursday 09 November 2017 22:06:15 Pavel Machek wrote: > > diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c > > index ed44439..ee2851a 100644 > > --- a/drivers/power/supply/bq27xxx_battery.c > > +++ b/drivers/power/supply/bq27xxx_battery.c > > @@ -381,6 +381,30 @@ static u8 bq27xxx_regs[][BQ27XXX_REG_MAX] = { > > [BQ27XXX_REG_AP] = INVALID_REG_ADDR, > > BQ27XXX_DM_REG_ROWS, > > }, > > + [BQ27521] = { /* FIXME */ > > + [BQ27XXX_REG_CTRL] = 0x02, > > + [BQ27XXX_REG_TEMP] = 0x0a, > > + [BQ27XXX_REG_INT_TEMP] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_VOLT] = 0x0c, > > + [BQ27XXX_REG_AI] = 0x0e, > > + [BQ27XXX_REG_FLAGS] = 0x08, > > + [BQ27XXX_REG_TTE] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_TTF] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_TTES] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_TTECP] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_NAC] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_FCC] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_CYCT] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_AE] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_SOC] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_DCAP] = INVALID_REG_ADDR, > > + [BQ27XXX_REG_AP] = INVALID_REG_ADDR, > > + [BQ27XXX_DM_CTRL] = INVALID_REG_ADDR, > > + [BQ27XXX_DM_CLASS] = INVALID_REG_ADDR, > > + [BQ27XXX_DM_BLOCK] = INVALID_REG_ADDR, > > + [BQ27XXX_DM_DATA] = INVALID_REG_ADDR, > > + [BQ27XXX_DM_CKSUM] = INVALID_REG_ADDR, > > + }, > > [BQ27530] = { > > [BQ27XXX_REG_CTRL] = 0x00, > > [BQ27XXX_REG_TEMP] = 0x06, > > Hi! IIRC those registers are valid only for sn27521 chip in revision 14 > (or new). For older revision is used different register map. And > detection of chip revision is somehow possible via some registers. Yes, I know.. I even had this, but as I can't test it, and early N950 samples should be very very rare, I'd prefer the patch as is. @@ -1905,6 +1940,23 @@ int bq27xxx_battery_setup(struct bq27xxx_device_info *di) dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION); + if (di->chip == BQ27521) { + int val; + val = di->bus.read(di, 0x32, false); + if (val == 0x2100) { + printk("rev. 13 chip detected; add support\n"); + /* https://elinux.org/N950 has details */ + return PTR_ERR(ENODEV); + } + + val = di->bus.read(di, 0x34, false); + if ((val & 0xff00) != 0x2100) { + printk("rev. 14 chip not detected?!\n"); + return PTR_ERR(EINVAL); + } + printk("verified chip rev. 14\n"); + } + bq27xxx_battery_settings(di); bq27xxx_battery_update(di); -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: