From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: [PATCH] I2C: OMAP: fix FIFO usage for OMAP4 Date: Tue, 6 Dec 2011 10:25:58 -0800 Message-ID: <1323195958-17982-1-git-send-email-khilman@ti.com> Return-path: Sender: linux-omap-owner@vger.kernel.org To: Ben Dooks Cc: linux-i2c@vger.kernel.org, linux-omap@vger.kernel.org, Shubhrajyoti D List-Id: linux-i2c@vger.kernel.org From: Shubhrajyoti D 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 --- Ben, can you queue this fix for v3.2-rc? Patch applies to v3.2-rc4. drivers/i2c/busses/i2c-omap.c | 11 ++++++----- 1 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index a43d002..fa23faa 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) / -- 1.7.6