kernel/linux.git/drivers/i2c/chips, branch linux-2.6.18.y

i2c: fix broken ds1337 initialization

2007-02-23T23:49:51+00:00

On a custom board with ds1337 RTC I found that upgrade from 2.6.15 to 2.6.18 broke RTC support. The main problem are changes to ds1337_init_client(). When a ds1337 recognizes a problem (e.g. power or clock failure) bit 7 in status register is set. This has to be reset by writing 0 to status register. But since there are only 16 byte written to the chip and the first byte is interpreted as an address, the status register (which is the 16th) is never written. The other problem is, that initializing all registers to zero is not valid for day, date and month register. Funny enough this is checked by ds1337_detect(), which depends on this values not being zero. So then treated by ds1337_init_client() the ds1337 is not detected anymore, whereas the failure bit in the status register is still set. Broken by commit f9e8957937ebf60d22732a5ca9130f48a7603f60 (2.6.16-rc1, 2006-01-06). This fix is in Linus' tree since 2.6.20-rc1 (commit 763d9c046a2e511ec090a8986d3f85edf7448e7e). Signed-off-by: Dirk Stieler Signed-off-by: Dirk Eibach Signed-off-by: Jean Delvare Signed-off-by: Chris Wright Signed-off-by: Greg Kroah-Hartman

[PATCH] i2c: tps65010 build fixes

2006-08-26T20:05:12+00:00

The tps65010.c driver in the main tree never got updated with build fixes since the last batch of I2C driver changes; and the genirq trigger flags were updated wierdly too. This also includes a minor tweak to reduce the frequency used to poll for unplug-the-AC-power on the TPS chips that don't provide relevant IRQs. It _would_ be nice to sense whether there's even a battery, but that'd normally be an HDQ/1-wire interface to a smart battery, and such APIs aren't standardized. Signed-off-by: David Brownell Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman

[PATCH] pca9539: Honor the force parameter

2006-07-12T22:43:07+00:00

The pca9539 driver doesn't honor the force parameter; it always does detection. This patch will skip detection if forced. Signed-off-by: Ben Gardner Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman

[PATCH] irq-flags: misc drivers: Use the new IRQF_ constants

2006-07-02T20:58:50+00:00

Signed-off-by: Thomas Gleixner Cc: Ingo Molnar Cc: "David S. Miller" Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel Signed-off-by: Adrian Bunk

[PATCH] i2c: Suggest N for rare devices in Kconfig

2006-06-22T18:10:33+00:00

Improve the Kconfig help text of the follwing i2c drivers: * busses/i2c-pca-isa.c * chips/pcf8574.c * chips/pcf8591.c These are hard to detect and building them into the kernel results in long delays at boot. March 2006, thread "I2C_PCA_ISA causes boot delays" http://marc.theaimsgroup.com/?l=linux-kernel&m=114360399415744&w=2 April 2006, thread "i2c-related 1-minute hang during bootup" http://marc.theaimsgroup.com/?l=linux-kernel&m=114640992330721&w=2 Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman

[PATCH] I2C: m41t00: Add support for the ST M41T81 and M41T85

2006-06-22T18:10:32+00:00

This patch adds support for the ST m41t81 and m41t85 i2c rtc chips to the existing m41t00 driver. Since there is no way to reliably determine what type of rtc chip is in use, the chip type is passed in via platform_data. The i2c address and square wave frequency are passed in via platform_data as well. To accommodate the use of platform_data, a new header file include/linux/m41t00.h has been added. The m41t81 and m41t85 chips halt the updating of their time registers while they are being accessed. They resume when a stop condition exists on the i2c bus or when non-time related regs are accessed. To make the best use of that facility and to make more efficient use of the i2c bus, this patch replaces multiple i2c_smbus_xxx calls with a single i2c_transfer call. Signed-off-by: Mark A. Greer Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman

[PATCH] i2c: cleanup m41t00

2006-06-22T18:10:32+00:00

This patch does some cleanup to the m41t00 i2c/rtc driver including: - use BCD2BIN/BIN2BCD instead of BCD_TO_BIN/BIN_TO_BCD - use strlcpy instead of strncpy - some whitespace cleanup Signed-off-by: Mark A. Greer Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman

[PATCH] m41t00: fix bitmasks when writing to chip

2006-04-19T16:13:49+00:00

Fix the bitmasks used when writing to the M41T00 registers. The original code used a mask of 0x7f when writing to each register, this is incorrect and probably the result of a copy-paste error. As a result years from 1980 to 1999 will be read back as 2000 to 2019. Signed-off-by: David Barksdale Acked-by: Jean Delvare Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] i2c: convert m41t00 to use a workqueue

2006-04-14T18:18:33+00:00

The m41t00 i2c/rtc driver currently uses a tasklet to schedule interrupt-level writes to the rtc. This patch causes the driver to use a workqueue instead. Signed-off-by: Mark A. Greer Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman