From: Shubhrajyoti D Date: Tue, 29 May 2012 10:56:15 +0000 (+0530) Subject: I2C: OMAP: Fix the interrupt clearing in OMAP4 X-Git-Tag: firefly_0821_release~3680^2~2323^2~56 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bd16c82f67a267b533e747c74c2fcd23578d4601;p=firefly-linux-kernel-4.4.55.git I2C: OMAP: Fix the interrupt clearing in OMAP4 On OMAP4 we were writing 1 to IRQENABLE_CLR which cleared only the arbitration lost interrupt. The patch intends to fix the same by writing 0 to the IE register clearing all interrupts. This is based on the work done by Vikram Pandita . The changes from the original patch ... - Does not use the IRQENABLE_CLR register to clear as it is not mentioned to be legacy register IRQENABLE_CLR helps in atomically setting/clearing specific interrupts, instead use the OMAP_I2C_IE_REG as we are clearing all interrupts. Cc: Vikram Pandita Reviewed-by: Kevin Hilman Signed-off-by: Shubhrajyoti D Signed-off-by: Wolfram Sang --- diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index c851672eb6a8..bf07ffd83c1e 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -1127,10 +1127,8 @@ static int omap_i2c_runtime_suspend(struct device *dev) u16 iv; _dev->iestate = omap_i2c_read_reg(_dev, OMAP_I2C_IE_REG); - if (_dev->dtrev == OMAP_I2C_IP_VERSION_2) - omap_i2c_write_reg(_dev, OMAP_I2C_IP_V2_IRQENABLE_CLR, 1); - else - omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, 0); + + omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, 0); if (_dev->rev < OMAP_I2C_OMAP1_REV_2) { iv = omap_i2c_read_reg(_dev, OMAP_I2C_IV_REG); /* Read clears */