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Date: Tue, 6 Mar 2007 23:02:15 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: bryan.wu@...log.com Cc: Alexey Dobriyan <adobriyan@...il.com>, Sonic Zhang <sonic.adi@...il.com>, Mike Frysinger <vapier.adi@...il.com>, khali@...ux-fr.org, linux-kernel@...r.kernel.org, mhfan@...c.edu, Roman Zippel <zippel@...ux-m68k.org> Subject: Re: [PATCH -mm] Blackfin: blackfin i2c driver On Wed, 07 Mar 2007 13:57:58 +0800 "Wu, Bryan" <bryan.wu@...log.com> wrote: > Here is the updated blackfin i2c driver. > > [PATCH] Blackfin: blackfin i2c driver > > The i2c linux driver for blackfin architecture which supports both GPIO > i2c operation and blackfin on-chip TWI controller i2c operation. > > Signed-off-by: Bryan Wu <bryan.wu@...log.com> > --- > drivers/i2c/busses/Kconfig | 47 ++++ > drivers/i2c/busses/i2c-bfin-gpio.c | 98 +++++++++ > drivers/i2c/busses/i2c-bfin-twi.c | 589 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 734 insertions(+) > > Index: linux-2.6/drivers/i2c/busses/Kconfig > =================================================================== > --- linux-2.6.orig/drivers/i2c/busses/Kconfig 2007-03-07 13:32:02.000000000 +0800 > +++ linux-2.6/drivers/i2c/busses/Kconfig 2007-03-07 13:44:19.000000000 +0800 > @@ -5,6 +5,53 @@ > menu "I2C Hardware Bus support" > depends on I2C > > +config I2C_BFIN_GPIO > + tristate "Generic Blackfin and HHBF533/561 development board I2C support" > + depends on I2C && EXPERIMENTAL > + select I2C_ALGOBIT > + help > + -- > + > +menu "BFIN I2C SDA/SCL Selection" > + depends on I2C_BFIN_GPIO > +config BFIN_SDA > + int "SDA is GPIO Number" > + range 0 15 if (BF533 || BF532 || BF531) > + range 0 47 if (BF534 || BF536 || BF537) > + range 0 47 if BF561 > + default 2 if (BF533 || BF532 || BF531) > + > +config BFIN_SCL > + int "SCL is GPIO Number" > + range 0 15 if (BF533 || BF532 || BF531) > + range 0 47 if (BF534 || BF536 || BF537) > + range 0 47 if BF561 > + default 3 > +endmenu > + > +config I2C_BFIN_GPIO_CYCLE_DELAY > + int "Cycle Delay in usec" > + depends on I2C_BFIN_GPIO > + range 1 100 > + default 40 > + > +config I2C_BFIN_TWI > + tristate "Blackfin TWI I2C support" > + depends on I2C && (BF534 || BF536 || BF537) > + help > + This the TWI I2C device driver for Blackfin 534/536/537. > + > + This driver can also be built as a module. If so, the module > + will be called i2c-bfin-twi. > + > +config TWICLK_KHZ > + int "TWI clock (kHZ)" > + depends on I2C_BFIN_TWI > + default 50 > + help > + The unit of the TWI clock is kilo HZ. Please divide the clock > + by 1024 if you count it in HZ. The value should be less than 400. > + Well that's cute. This patch causes an i386 `make allmodconfig' to spew these: SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) SDA is GPIO Number (BFIN_SDA) [] (NEW) out at about 1,000,000/sec, infinitely. I'll put a `depends on BFIN' in there to shut it up, but I think you've tickled a Kconfig bug. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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