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i2c: tegra: add separate function for config_load programing

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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>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Shardar Shariff Md 2016-08-31 18:58:42 +05:30 committed by Wolfram Sang
parent 2148c01cce
commit 89120d66fc
1 changed files with 26 additions and 15 deletions
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41
drivers/i2c/busses/i2c-tegra.c
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@ -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;
@ -500,21 +523,9 @@ 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;
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;