[PATCH v11 4/5] i2c: tegra: use atomic poll function during configuration
From: Shardar Shariff Md <hidden>
Date: 2016-08-31 13:29:25
Also in:
linux-i2c, lkml
Subsystem:
i2c subsystem, i2c subsystem host drivers, tegra i2c driver, the rest · Maintainers:
Andi Shyti, Laxman Dewangan, Linus Torvalds
Use readl_poll_timeout_atomic() function as *wait_for_config_load() function can be called from interrupt context. Signed-off-by: Shardar Shariff Md <redacted> --- Changes in v10: - Rebase on top of [PATCH V2 0/9] Some Tegra I2C Updates Changes in v11: - Fix checkpatch error of using in_atomic() API --- --- drivers/i2c/busses/i2c-tegra.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index daab0ce..2437535 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c@@ -457,8 +457,13 @@ static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev) reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_CONFIG_LOAD); addr = i2c_dev->base + reg_offset; i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD); - err = readl_poll_timeout(addr, val, val == 0, 1000, - I2C_CONFIG_LOAD_TIMEOUT); + if (in_interrupt()) + err = readl_poll_timeout_atomic(addr, val, val == 0, + 1000, I2C_CONFIG_LOAD_TIMEOUT); + else + err = readl_poll_timeout(addr, val, val == 0, + 1000, I2C_CONFIG_LOAD_TIMEOUT); + if (err) { dev_warn(i2c_dev->dev, "timeout waiting for config load\n");
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1.8.1.5