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| Started by | Shardar Shariff Md <smohammed@nvidia.com> |
|---|---|
| First post | 2016-08-31 15:30 +0200 |
| Last post | 2016-08-31 15:30 +0200 |
| Articles | 1 — 1 participant |
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[PATCH v11 4/5] i2c: tegra: use atomic poll function during configuration Shardar Shariff Md <smohammed@nvidia.com> - 2016-08-31 15:30 +0200
| From | Shardar Shariff Md <smohammed@nvidia.com> |
|---|---|
| Date | 2016-08-31 15:30 +0200 |
| Subject | [PATCH v11 4/5] i2c: tegra: use atomic poll function during configuration |
| Message-ID | <scdKy-2UO-9@gated-at.bofh.it> |
Use readl_poll_timeout_atomic() function as *wait_for_config_load()
function can be called from interrupt context.
Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com>
---
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");
--
1.8.1.5
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