[PATCH v7 3/4] i2c: tegra: add separate function for config_load

Shardar Shariff Md
2016-04-25T13:39:29Z

Define separate function for configuration load register handling
to make it use by different functions later.

Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com>

---
Changes in v2:
- Remove unnecessary paranthesis and align to 80 characters per line

Changes in v3:
- Add separate function for config load handling

Changes in v4:
- Move timeout calculation to separate patch
---
drivers/i2c/busses/i2c-tegra.c | 38 ++++++++++++++++++++++++--------------
1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index c1b02c7..8d49995 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -426,6 +426,27 @@ static inline void tegra_i2c_clock_disable(struct tegra_i2c_dev *i2c_dev)
clk_disable(i2c_dev->fast_clk);
}

+static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
+{
+ if (i2c_dev->hw->has_config_load_reg) {
+ u32 val;
+ int err;
+
+ i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD);
+ err = readx_poll_timeout(readl, i2c_dev->base +
+ tegra_i2c_reg_addr(i2c_dev,
+ I2C_CONFIG_LOAD), val, val == 0,
+ 1000, I2C_CONFIG_LOAD_TIMEOUT);
+ if (err) {
+ dev_warn(i2c_dev->dev,
+ "timeout waiting for config load\n");
+ return err;
+ }
+ }
+
+ return 0;
+}
+
static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
{
u32 val;
@@ -479,20 +500,9 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
if (i2c_dev->is_multimaster_mode && i2c_dev->hw->has_slcg_override_reg)
i2c_writel(i2c_dev, I2C_MST_CORE_CLKEN_OVR, I2C_CLKEN_OVERRIDE);

- if (i2c_dev->hw->has_config_load_reg) {
- u32 val;
-
- i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD);
- err = readx_poll_timeout(readl, i2c_dev->base +
- tegra_i2c_reg_addr(i2c_dev,
- I2C_CONFIG_LOAD), val, val == 0,
- 1000, I2C_CONFIG_LOAD_TIMEOUT);
- if (err) {
- dev_warn(i2c_dev->dev,
- "timeout waiting for config load\n");
- goto err;
- }
- }
+ err = tegra_i2c_wait_for_config_load(i2c_dev);
+ if (err)
+ goto err;

if (i2c_dev->irq_disabled) {
i2c_dev->irq_disabled = 0;
--
1.8.1.5