diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/808-i2c-0010-i2c-imx-fix-system-hang-due-to-access-i2c-registers-.patch')
-rw-r--r-- | target/linux/layerscape/patches-5.4/808-i2c-0010-i2c-imx-fix-system-hang-due-to-access-i2c-registers-.patch | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/target/linux/layerscape/patches-5.4/808-i2c-0010-i2c-imx-fix-system-hang-due-to-access-i2c-registers-.patch b/target/linux/layerscape/patches-5.4/808-i2c-0010-i2c-imx-fix-system-hang-due-to-access-i2c-registers-.patch deleted file mode 100644 index 435bb14e8d..0000000000 --- a/target/linux/layerscape/patches-5.4/808-i2c-0010-i2c-imx-fix-system-hang-due-to-access-i2c-registers-.patch +++ /dev/null @@ -1,52 +0,0 @@ -From 97db2ca4485dc7b10b8382832befe607ade59a6b Mon Sep 17 00:00:00 2001 -From: Dong Aisheng <aisheng.dong@nxp.com> -Date: Sat, 26 Jan 2019 17:51:59 +0800 -Subject: [PATCH] i2c: imx: fix system hang due to access i2c registers without - clock - -Currently, i2c_imx_bus_busy in i2c_imx_xfer is called before -pm_runtime_get which means the clocks are still not enabled. -This will cause a hang on IMX as IMX requires accessing registers -with clocks. - -So let's change the order to ensure the clocks are enabled before -accessing registers. This is also a more safe way to access registers, -suppose shouldn't affect other platforms. - -Fixes: 4a6ebf1c125c ("i2c: imx: add workaround for erratum ERR010027") -Reviewed-by: Biwen Li <biwen.li@nxp.com> -Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> ---- - drivers/i2c/busses/i2c-imx.c | 9 ++++----- - 1 file changed, 4 insertions(+), 5 deletions(-) - ---- a/drivers/i2c/busses/i2c-imx.c -+++ b/drivers/i2c/busses/i2c-imx.c -@@ -1094,12 +1094,15 @@ static int i2c_imx_xfer(struct i2c_adapt - - dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); - -- - if (!pm_runtime_enabled(i2c_imx->adapter.dev.parent)) { - pm_runtime_enable(i2c_imx->adapter.dev.parent); - enable_runtime_pm = true; - } - -+ result = pm_runtime_get_sync(i2c_imx->adapter.dev.parent); -+ if (result < 0) -+ goto out; -+ - /* - * workround for ERR010027: ensure that the I2C BUS is idle - * before switching to master mode and attempting a Start cycle -@@ -1113,10 +1116,6 @@ static int i2c_imx_xfer(struct i2c_adapt - goto out; - } - -- result = pm_runtime_get_sync(i2c_imx->adapter.dev.parent); -- if (result < 0) -- goto out; -- - /* Start I2C transfer */ - result = i2c_imx_start(i2c_imx); - if (result) { |