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Manjunatha GK 57eb81b14e i2c-omap: OMAP3: Fix I2C lockup during timeout/error cases 
Current OMAP3 I2C driver code does not follow the correct sequence for soft
reset. Due to this, lock up issues are reported during timeout/error cases.

This patch fixes above issue by disabling I2C controller as per OMAP3430 TRM
for soft reset. As per TRM, I2C controller needs to be disabled as a first
step during soft reset.

Here is correct soft reset sequence:
a. Ensure that the module is disabled
(clear the I2Ci.I2C_CON[15] I2C_EN bit to 0).
b. Set the I2Ci.I2C_SYSC[1] SRST bit to 1.
c. Enable the module by setting I2Ci.I2C_CON[15] I2C_EN bit to 1.
d. Check the I2Ci.I2C_SYSS[0] RDONE bit until it is set to 1 to
indicate the software reset is complete.

Tested on Zoom2, Zoom3, 3430SDP and 3630SDP

Signed-off-by: Manjunatha GK <manjugk@ti.com>
Signed-off-by: George, Harith<harith@ti.com>
Acked-by: Varadarajan, Charu Latha<charu@ti.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-12-24 01:30:54 +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-bfin-twi: fix CLKDIV calculation 2009-12-24 01:24:48 +00:00
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: i2c_dw_handle_tx_abort: Use dev_dbg() for NOACK cases 2009-12-09 00:19:13 +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: OMAP3: Fix I2C lockup during timeout/error cases 2009-12-24 01:30:54 +00:00
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-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 i2c-pnx: Map I2C adapter number to platform ID number 2009-12-09 00:19:13 +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 const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
i2c-s3c2410.c const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
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 ACPICA: Add post-order callback to acpi_walk_namespace 2009-11-24 21:31:10 -05:00
i2c-sh7760.c sh: clkfwk: module_clk -> peripheral_clk rename. 2009-05-13 16:59:40 +09:00
i2c-sh_mobile.c const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
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