From: Shardar Shariff Md <smohammed@nvidia.com>
To: <smohammed@nvidia.com>, <wsa@the-dreams.de>,
<swarren@wwwdotorg.org>, <thierry.reding@gmail.com>,
<gnurou@gmail.com>, <linux-i2c@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<jonathanh@nvidia.com>, <ldewangan@nvidia.com>
Subject: [PATCH v11 4/5] i2c: tegra: use atomic poll function during configuration
Date: Wed, 31 Aug 2016 18:58:43 +0530 [thread overview]
Message-ID: <1472650124-5702-4-git-send-email-smohammed@nvidia.com> (raw)
In-Reply-To: <1472650124-5702-1-git-send-email-smohammed@nvidia.com>
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
next prev parent reply other threads:[~2016-08-31 13:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-31 13:28 [PATCH v11 1/5] i2c: tegra: use readl_poll_timeout after config_load reg programmed Shardar Shariff Md
2016-08-31 13:28 ` [PATCH v11 2/5] i2c: tegra: If fifo flush fails return error Shardar Shariff Md
2016-08-31 13:28 ` [PATCH v11 3/5] i2c: tegra: add separate function for config_load programing Shardar Shariff Md
2016-08-31 13:28 ` Shardar Shariff Md [this message]
2016-08-31 13:28 ` [PATCH v11 5/5] i2c: tegra: proper handling of error cases Shardar Shariff Md
2016-09-08 20:37 ` [PATCH v11 1/5] i2c: tegra: use readl_poll_timeout after config_load reg programmed Wolfram Sang
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