[PATCH v10 2/4] i2c: tegra: add separate function for config_load programing

From: Shardar Shariff Md
Date: Tue Aug 30 2016 - 15:11:48 EST


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

Signed-off-by: Shardar Shariff Md <smohammed@xxxxxxxxxx>

---
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

Changes in v9:
- Rebase with the changes to earlier patch1

Changes in v10:
- Rebase on top of [PATCH V2 0/9] Some Tegra I2C Updates
---
---
drivers/i2c/busses/i2c-tegra.c | 42 ++++++++++++++++++++++++++----------------
1 file changed, 26 insertions(+), 16 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 5eb37ab..5e94056 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -446,6 +446,29 @@ static int tegra_i2c_runtime_suspend(struct device *dev)
return pinctrl_pm_select_idle_state(i2c_dev->dev);
}

+static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
+{
+ unsigned long reg_offset;
+ void __iomem *addr;
+ u32 val;
+ int err;
+
+ if (i2c_dev->hw->has_config_load_reg) {
+ 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 (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;
@@ -498,22 +521,9 @@ 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) {
- unsigned long reg_offset;
- void __iomem *addr;
- u32 val;
-
- 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 (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