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authorLaxman Dewangan <ldewangan@nvidia.com>2012-08-08 13:21:32 +0530
committerStephen Warren <swarren@nvidia.com>2012-09-13 11:40:29 -0600
commit14e92bd4ff7381e84bc7f24596721e0054b5f783 (patch)
tree323071195fe6c04ad1a5c4feae28c2d9fc4bbb9b /drivers/i2c
parente54848d9ba7114ac2fa51b104eb6b1e7c67d9b28 (diff)
downloadlinux-linaro-stable-14e92bd4ff7381e84bc7f24596721e0054b5f783.tar.gz
i2c: tegra: pass proper name for getting clock
Tegra's i2c controller require two clock sources named as div_clk and fast_clk. This change make sure that driver pass the correct clock's name when it acquires clock handle. Also change the variable name to reflect the correct clock handles. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-tegra.c46
1 files changed, 23 insertions, 23 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 9a08c57bc936..8514d3a95a68 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -117,8 +117,8 @@ enum msg_end_type {
* struct tegra_i2c_dev - per device i2c context
* @dev: device reference for power management
* @adapter: core i2c layer adapter information
- * @clk: clock reference for i2c controller
- * @i2c_clk: clock reference for i2c bus
+ * @div_clk: clock reference for div clock of i2c controller.
+ * @fast_clk: clock reference for fast clock of i2c controller.
* @base: ioremapped registers cookie
* @cont_id: i2c controller id, used for for packet header
* @irq: irq number of transfer complete interrupt
@@ -134,8 +134,8 @@ enum msg_end_type {
struct tegra_i2c_dev {
struct device *dev;
struct i2c_adapter adapter;
- struct clk *clk;
- struct clk *i2c_clk;
+ struct clk *div_clk;
+ struct clk *fast_clk;
void __iomem *base;
int cont_id;
int irq;
@@ -356,11 +356,11 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
u32 val;
int err = 0;
- clk_prepare_enable(i2c_dev->clk);
+ clk_prepare_enable(i2c_dev->div_clk);
- tegra_periph_reset_assert(i2c_dev->clk);
+ tegra_periph_reset_assert(i2c_dev->div_clk);
udelay(2);
- tegra_periph_reset_deassert(i2c_dev->clk);
+ tegra_periph_reset_deassert(i2c_dev->div_clk);
if (i2c_dev->is_dvc)
tegra_dvc_init(i2c_dev);
@@ -369,7 +369,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
(0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
i2c_writel(i2c_dev, val, I2C_CNFG);
i2c_writel(i2c_dev, 0, I2C_INT_MASK);
- clk_set_rate(i2c_dev->clk, i2c_dev->bus_clk_rate * 8);
+ clk_set_rate(i2c_dev->div_clk, i2c_dev->bus_clk_rate * 8);
if (!i2c_dev->is_dvc) {
u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG);
@@ -387,7 +387,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
if (tegra_i2c_flush_fifos(i2c_dev))
err = -ETIMEDOUT;
- clk_disable_unprepare(i2c_dev->clk);
+ clk_disable_unprepare(i2c_dev->div_clk);
if (i2c_dev->irq_disabled) {
i2c_dev->irq_disabled = 0;
@@ -563,7 +563,7 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
if (i2c_dev->is_suspended)
return -EBUSY;
- clk_prepare_enable(i2c_dev->clk);
+ clk_prepare_enable(i2c_dev->div_clk);
for (i = 0; i < num; i++) {
enum msg_end_type end_type = MSG_END_STOP;
if (i < (num - 1)) {
@@ -576,7 +576,7 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
if (ret)
break;
}
- clk_disable_unprepare(i2c_dev->clk);
+ clk_disable_unprepare(i2c_dev->div_clk);
return ret ?: i;
}
@@ -596,8 +596,8 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
struct tegra_i2c_dev *i2c_dev;
struct tegra_i2c_platform_data *pdata = pdev->dev.platform_data;
struct resource *res;
- struct clk *clk;
- struct clk *i2c_clk;
+ struct clk *div_clk;
+ struct clk *fast_clk;
const unsigned int *prop;
void __iomem *base;
int irq;
@@ -622,16 +622,16 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
}
irq = res->start;
- clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(clk)) {
+ div_clk = devm_clk_get(&pdev->dev, "div-clk");
+ if (IS_ERR(div_clk)) {
dev_err(&pdev->dev, "missing controller clock");
- return PTR_ERR(clk);
+ return PTR_ERR(div_clk);
}
- i2c_clk = devm_clk_get(&pdev->dev, "i2c");
- if (IS_ERR(i2c_clk)) {
+ fast_clk = devm_clk_get(&pdev->dev, "fast-clk");
+ if (IS_ERR(fast_clk)) {
dev_err(&pdev->dev, "missing bus clock");
- return PTR_ERR(i2c_clk);
+ return PTR_ERR(fast_clk);
}
i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
@@ -641,8 +641,8 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
}
i2c_dev->base = base;
- i2c_dev->clk = clk;
- i2c_dev->i2c_clk = i2c_clk;
+ i2c_dev->div_clk = div_clk;
+ i2c_dev->fast_clk = fast_clk;
i2c_dev->adapter.algo = &tegra_i2c_algo;
i2c_dev->irq = irq;
i2c_dev->cont_id = pdev->id;
@@ -681,7 +681,7 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
return ret;
}
- clk_prepare_enable(i2c_dev->i2c_clk);
+ clk_prepare_enable(i2c_dev->fast_clk);
i2c_set_adapdata(&i2c_dev->adapter, i2c_dev);
i2c_dev->adapter.owner = THIS_MODULE;
@@ -696,7 +696,7 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
ret = i2c_add_numbered_adapter(&i2c_dev->adapter);
if (ret) {
dev_err(&pdev->dev, "Failed to add I2C adapter\n");
- clk_disable_unprepare(i2c_dev->i2c_clk);
+ clk_disable_unprepare(i2c_dev->fast_clk);
return ret;
}