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4cb6d1d6da
linux/drivers/i2c/busses
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Shinya Kuribayashi 4cb6d1d6da i2c-designware: Set Tx/Rx FIFO threshold levels 
As a hardware feature, DW I2C core generates a STOP condition whenever
the Tx FIFO becomes empty (strictly speaking, whenever the last byte in
the Tx FIFO is sent out), even if we have more bytes to be written.

In other words, we must never make "Tx FIFO underrun" happen during
a transaction, except for the last byte.  For the safety's sake, we'd
make TX_EMPTY interrupt get triggered every time one byte is processed.

The Rx FIFO threshold needs to be set as well.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-12-09 00:19:11 +00:00
..
i2c-acorn.c [ARM] acorn,ebsa110,footbridge,integrator,sa1100: Convert asm/io.h to linux/io.h 2009-03-25 10:21:35 +00:00
i2c-ali15x3.c i2c: Add missing __devinit markers to old i2c adapter drivers 2009-12-06 17:06:23 +01:00
i2c-ali1535.c i2c: Add missing __devinit markers to old i2c adapter drivers 2009-12-06 17:06:23 +01:00
i2c-ali1563.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-amd756-s4882.c i2c: Use snprintf to set adapter names 2009-01-07 14:29:18 +01:00
i2c-amd756.c i2c: Hide probe errors caused by ACPI resource conflicts 2009-10-04 22:53:45 +02:00
i2c-amd8111.c i2c: Hide probe errors caused by ACPI resource conflicts 2009-10-04 22:53:45 +02:00
i2c-at91.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-au1550.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-bfin-twi.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-cpm.c i2c: Fix stuck transaction on cpm-i2c driver 2009-06-22 01:43:32 +01:00
i2c-davinci.c i2c: Use resource_size 2009-07-15 00:03:56 +01:00
i2c-designware.c i2c-designware: Set Tx/Rx FIFO threshold levels 2009-12-09 00:19:11 +00:00
i2c-elektor.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-gpio.c i2c: i2c_gpio: keep probe resident for hotplugged devices. 2008-07-28 12:40:44 +01:00
i2c-highlander.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-hydra.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-i801.c i2c-i801: Retry on lost arbitration 2009-12-06 17:06:27 +01:00
i2c-ibm_iic.c Remove multiple KERN_ prefixes from printk formats 2009-07-08 10:30:03 -07:00
i2c-ibm_iic.h i2c-ibm_iic: Whitespace cleanup 2008-01-27 18:14:45 +01:00
i2c-imx.c i2c: imx: disable clock when it's possible to save power. 2009-11-02 23:28:47 +00:00
i2c-iop3xx.c i2c: Bus drivers don't have to support I2C_M_REV_DIR_ADDR 2009-12-06 17:06:22 +01:00
i2c-iop3xx.h
i2c-isch.c i2c: Hide probe errors caused by ACPI resource conflicts 2009-10-04 22:53:45 +02:00
i2c-ixp2000.c i2c: Make sure i2c_algo_bit_data.timeout is HZ-independent 2009-02-24 19:19:49 +01:00
i2c-mpc.c i2c-mpc: Do not generate STOP after read. 2009-11-02 23:28:47 +00:00
i2c-mv64xxx.c i2c: Bus drivers don't have to support I2C_M_REV_DIR_ADDR 2009-12-06 17:06:22 +01:00
i2c-nforce2-s4985.c i2c: Fix oops on bus multiplexer driver loading 2008-08-10 22:56:15 +02:00
i2c-nforce2.c i2c: Timeouts off by 1 2009-05-05 08:39:24 +02:00
i2c-ocores.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-omap.c i2c-omap: Enable workaround for Errata 1.153 based on 2009-08-20 22:27:58 +01:00
i2c-parport-light.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-parport.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-parport.h i2c-parport: Add support for One For All remote JP1 interface 2007-02-13 22:09:02 +01:00
i2c-pasemi.c i2c: Let bus drivers add SPD to their class 2008-07-14 22:38:29 +02:00
i2c-pca-isa.c i2c-algo-pca: Use timeout for checking the state machine 2009-03-28 21:34:45 +01:00
i2c-pca-platform.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-piix4.c i2c-piix4: Modify code name SB900 to Hudson-2 2009-11-07 13:10:46 +01:00
i2c-pmcmsp.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-pnx.c ARM: PNX4008: i2c-pnx: use the same dev_id for request_irq and free_irq 2009-11-21 19:01:05 +00:00
i2c-powermac.c i2c: Bus drivers don't have to support I2C_M_REV_DIR_ADDR 2009-12-06 17:06:22 +01:00
i2c-pxa.c I2C: Rework i2c-pxa suspend_late()/resume_early() 2009-07-22 00:28:39 +02:00
i2c-s3c2410.c Merge branch 'master' into for-linus 2009-07-30 19:38:04 +02:00
i2c-s6000.c i2c: xtensa s6000 i2c driver 2009-04-07 10:23:34 +01:00
i2c-s6000.h i2c: xtensa s6000 i2c driver 2009-04-07 10:23:34 +01:00
i2c-scmi.c ACPI: i2c-scmi: don't use acpi_device_uid() 2009-09-26 01:42:07 -04:00
i2c-sh7760.c sh: clkfwk: module_clk -> peripheral_clk rename. 2009-05-13 16:59:40 +09:00
i2c-sh_mobile.c i2c: Runtime PM for SuperH Mobile I2C 2009-08-23 18:03:19 +09:00
i2c-sibyte.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-simtec.c i2c: Use resource_size 2009-07-15 00:03:56 +01:00
i2c-sis96x.c i2c: Hide probe errors caused by ACPI resource conflicts 2009-10-04 22:53:45 +02:00
i2c-sis630.c i2c: Add missing __devinit markers to old i2c adapter drivers 2009-12-06 17:06:23 +01:00
i2c-sis5595.c i2c: Add missing __devinit markers to old i2c adapter drivers 2009-12-06 17:06:23 +01:00
i2c-stu300.c i2c-stu300: I2C STU300 stability updates 2009-08-20 22:27:58 +01:00
i2c-stub.c i2c-stub: Allow user to disable some commands 2009-12-06 17:06:29 +01:00
i2c-taos-evm.c i2c-taos-evm: Switch echo off to improve performance 2009-09-18 22:45:43 +02:00
i2c-tiny-usb.c i2c-tiny-usb: New VID/PID pair 2008-04-11 12:07:05 +02:00
i2c-versatile.c i2c: Use resource_size macro 2009-06-16 22:42:16 +01:00
i2c-via.c i2c: Delete many unused adapter IDs 2009-01-26 21:19:52 +01:00
i2c-viapro.c i2c: Hide probe errors caused by ACPI resource conflicts 2009-10-04 22:53:45 +02:00
Kconfig i2c-voodoo3: Delete 2009-12-06 17:06:21 +01:00
Makefile i2c-voodoo3: Delete 2009-12-06 17:06:21 +01:00
scx200_acb.c i2c/scx200_acb: Provide more information on bus errors 2009-09-18 22:45:47 +02:00
scx200_i2c.c i2c: Make sure i2c_algo_bit_data.timeout is HZ-independent 2009-02-24 19:19:49 +01:00