mirror of https://gitee.com/openkylin/linux.git
57eb81b14e
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> |
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| .. | ||
| algos | ||
| busses | ||
| chips | ||
| Kconfig | ||
| Makefile | ||
| i2c-boardinfo.c | ||
| i2c-core.c | ||
| i2c-core.h | ||
| i2c-dev.c | ||