From: Bruno D. <du...@po...> - 2004-10-11 09:49:42
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On Fri, Oct 08, 2004 at 08:36:09PM +0100, Pedro Venda wrote: > Li, Shaohua wrote: > >>On Thu, Oct 07, 2004 at 09:43:20PM +0800, Li, Shaohua wrote: > >> > >>>You needed an EC-based SMBus host driver (IIRC, some Acer latops > > > >defined > > > >>>such host in DSDT). ACPI spec has the definition for EC-based SMBus > > > >host > > > >>>interface. Second, a sensor driver for reading smart battery > > > >information > > > >>>is required. > >>> > >> > >>Some times ago, for a toshiba laptop, I began an i2c-acpi-ec driver: > >>ftp://ftp.poupinou.org/acpi/i2c-acpi-ec.c > >> > >>It's a little bit buggy though but this allowed for me to access the > >>sensors > >>behind the EC. The main trouble was that there were not actually a > >>smbus declared in the ACPI namespace and it was needed to hardcode > > > >where > > > >>is the base adress in the EC space. > >>You may try to start with that maybe, and I guess a real > > > >acpi_ec_smb_probe > > > >>function must be written. > > > >Some Acer laptops define the SMBus host as below: > > Device (SMBC) > > { > > Name (_HID, "ACPI0001") > > Name (_EC, 0x1820) > > Device (SBS0) > > { > > Name (_HID, "ACPI0002") > > Name (_SBS, 0x02) > > } > > } > >The base address and the notification number are defined on the _EC > >method. > >Please check if you system has such definition. > > my acer travelmate 4001WLmi looks like this: > > Device (SMBC) > { > Name (_HID, "ACPI0001") > Name (_EC, 0x1820) > Device (SBS0) > { > Name (_HID, "ACPI0002") > Name (_SBS, 0x02) > } > } > This mean that you have a SMB-HC with adress 0x18 and query 0x20. You may try i2c-acpi-ec, but you have to change: #define SMBUS_ADDRESS_TO_HAVE 0x60 to #define SMBUS_ADDRESS_TO_HAVE 0x18 Also, you need to get at least i2c-core in your kernel for this to work. Note that this code have 2 years... and if there is more than one EC in your system, this may not work. In that case, could you please send me a dump of the acpi tables? btw, there is two batteries, because 'Name (_SBS, 0x02)'. Cheers, -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care. |