From 1d5a34fe990c9e2e2f672b238ad881d0d4ed376b Mon Sep 17 00:00:00 2001 From: Shubhrajyoti D Date: Tue, 6 Dec 2011 10:25:58 -0800 Subject: [PATCH] I2C: OMAP: fix FIFO usage for OMAP4 Currently the fifo depth is set to zero for OMAP4 which disables the FIFO usage. This patch enables the FIFO usage for I2C transactions on OMAP4 also. Tested on omap4430 and 3430. Tested-and-Reported-by: Nishanth Menon Signed-off-by: Shubhrajyoti D Signed-off-by: Kevin Hilman Signed-off-by: Ben Dooks --- drivers/i2c/busses/i2c-omap.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index a43d0023446a..fa23faa20f0e 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -1047,13 +1047,14 @@ omap_i2c_probe(struct platform_device *pdev) * size. This is to ensure that we can handle the status on int * call back latencies. */ - if (dev->rev >= OMAP_I2C_REV_ON_3530_4430) { - dev->fifo_size = 0; + + dev->fifo_size = (dev->fifo_size / 2); + + if (dev->rev >= OMAP_I2C_REV_ON_3530_4430) dev->b_hw = 0; /* Disable hardware fixes */ - } else { - dev->fifo_size = (dev->fifo_size / 2); + else dev->b_hw = 1; /* Enable hardware fixes */ - } + /* calculate wakeup latency constraint for MPU */ if (dev->set_mpu_wkup_lat != NULL) dev->latency = (1000000 * dev->fifo_size) / -- 2.39.5