From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tang Yuantian-B29983 Date: Fri, 29 Jul 2011 04:56:25 +0000 Subject: Re: [lm-sensors] [PATCH] hwmon: (zl6100) Add new chip support Message-Id: <3C06C26914DACA4BB3A368F78CA0B3A70A7E0D@039-SN1MPN1-004.039d.mgd.msft.net> List-Id: References: <1308707361-15558-1-git-send-email-b29983@freescale.com> In-Reply-To: <1308707361-15558-1-git-send-email-b29983@freescale.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: lm-sensors@vger.kernel.org Hi, I got this from Intersil Support. It is a zl6100 chip Errata and can't be found in zl6100 later chip. So, this chip maybe can't work on PMbus framework. Good luck! Regards, Yuantian > -----Original Message----- > From: Guenter Roeck [mailto:guenter.roeck@ericsson.com] > Sent: 2011=C4=EA7=D4=C229=C8=D5 12:35 > To: Tang Yuantian-B29983 > Cc: lm-sensors@lm-sensors.org > Subject: Re: [PATCH] hwmon: (zl6100) Add new chip support >=20 > On Wed, Jun 22, 2011 at 09:49:21AM +0800, b29983@freescale.com wrote: > > From: Tang Yuantian > > > > The ZL6100 is a digital power controller with Power Monitoring > support. > > It provides an I2C/SMBus digital interface that enables the user to > > configure all aspects of the device operation as well as monitor > the > > input and output parameters. It accepts most standard PMBus > commands. > > Four parameters are output here which are Output Current, Output > Voltage, > > Local Temperature and Remote Temperature. > > > > This chip is currently used on some PowerPC platform. > > > > Signed-off-by: Tang Yuantian >=20 > Hi, >=20 > I finally got an eval board for the ZL6100 and was able to do some > testing. >=20 > The key problem with the chip and the generic PMBus driver is reflected > by the > msleep(2); > in your driver. Problem here is that this adds a delay of up to 20ms to > each and every I2C read command, which is really not desirable. I found > that udelay(500) does the trick as well, but is not much better. I'll > need to think about this a bit. >=20 > Where do you have the 2ms value from ? I don't seem to be able to find it > in the datasheet. > Also, the ZL6105 does not seem to have the timing problem. >=20 > Thanks, > Guenter _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors