[PATCH v2 2/9] i2c: tegra: Add clk_prepare/clk_unprepare

[PATCH v2 2/9] i2c: tegra: Add clk_prepare/clk_unprepare

[Prashant Gaikwad]

Use clk_prepare/clk_unprepare as required by the generic clk framework.

Signed-off-by: Prashant Gaikwad <pgaikwad-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
This patch should go through Tegra tree since other patches to port tegra
to generic clock framework are dependent on it. Posting here to get ack from
the maintainers.

 drivers/i2c/busses/i2c-tegra.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 8b2e555..3da7ee3 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -341,7 +341,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
 	u32 val;
 	int err = 0;
 
-	clk_enable(i2c_dev->clk);
+	clk_prepare_enable(i2c_dev->clk);
 
 	tegra_periph_reset_assert(i2c_dev->clk);
 	udelay(2);
@@ -372,7 +372,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
 	if (tegra_i2c_flush_fifos(i2c_dev))
 		err = -ETIMEDOUT;
 
-	clk_disable(i2c_dev->clk);
+	clk_disable_unprepare(i2c_dev->clk);
 
 	if (i2c_dev->irq_disabled) {
 		i2c_dev->irq_disabled = 0;
@@ -546,14 +546,14 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
 	if (i2c_dev->is_suspended)
 		return -EBUSY;
 
-	clk_enable(i2c_dev->clk);
+	clk_prepare_enable(i2c_dev->clk);
 	for (i = 0; i < num; i++) {
 		int stop = (i == (num - 1)) ? 1  : 0;
 		ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], stop);
 		if (ret)
 			break;
 	}
-	clk_disable(i2c_dev->clk);
+	clk_disable_unprepare(i2c_dev->clk);
 	return ret ?: i;
 }
 
@@ -666,7 +666,7 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
 		goto err_free;
 	}
 
-	clk_enable(i2c_dev->i2c_clk);
+	clk_prepare_enable(i2c_dev->i2c_clk);
 
 	i2c_set_adapdata(&i2c_dev->adapter, i2c_dev);
 	i2c_dev->adapter.owner = THIS_MODULE;
-- 
1.7.4.1

[PATCH v2 3/9] mmc: tegra: add clk_prepare/clk_unprepare

[Prashant Gaikwad]

Use clk_prepare/clk_unprepare as required by the generic clk framework.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
---
This patch should go through Tegra tree since other patches to port tegra
to generic clock framework are dependent on it. Posting here to get ack from
the maintainers.

 drivers/mmc/host/sdhci-tegra.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index b38d8a7..2789656 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -334,7 +334,7 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
 		rc = PTR_ERR(clk);
 		goto err_clk_get;
 	}
-	clk_enable(clk);
+	clk_prepare_enable(clk);
 	pltfm_host->clk = clk;
 
 	host->mmc->pm_caps = plat->pm_flags;
@@ -349,7 +349,7 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
 	return 0;
 
 err_add_host:
-	clk_disable(pltfm_host->clk);
+	clk_disable_unprepare(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
 err_clk_get:
 	if (gpio_is_valid(plat->wp_gpio))
@@ -390,7 +390,7 @@ static int __devexit sdhci_tegra_remove(struct platform_device *pdev)
 	if (gpio_is_valid(plat->power_gpio))
 		gpio_free(plat->power_gpio);
 
-	clk_disable(pltfm_host->clk);
+	clk_disable_unprepare(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
 
 	sdhci_pltfm_free(pdev);
-- 
1.7.4.1

[PATCH v2 5/9] Input: tegra-kbc - add clk_prepare/clk_unprepare

[Prashant Gaikwad]

Use clk_prepare/clk_unprepare as required by the generic clk framework.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
---
This patch should go through Tegra tree since other patches to port tegra
to generic clock framework are dependent on it. Posting here to get ack from
the maintainers.

 drivers/input/keyboard/tegra-kbc.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index 4ffe64d..2c1c9ed 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -492,7 +492,7 @@ static int tegra_kbc_start(struct tegra_kbc *kbc)
 	unsigned int debounce_cnt;
 	u32 val = 0;
 
-	clk_enable(kbc->clk);
+	clk_prepare_enable(kbc->clk);
 
 	/* Reset the KBC controller to clear all previous status.*/
 	tegra_periph_reset_assert(kbc->clk);
@@ -556,7 +556,7 @@ static void tegra_kbc_stop(struct tegra_kbc *kbc)
 	disable_irq(kbc->irq);
 	del_timer_sync(&kbc->timer);
 
-	clk_disable(kbc->clk);
+	clk_disable_unprepare(kbc->clk);
 }
 
 static int tegra_kbc_open(struct input_dev *dev)
-- 
1.7.4.1

[PATCH v2 6/9] spi/tegra: add clk_prepare/clk_unprepare

[Prashant Gaikwad]

Use clk_prepare/clk_unprepare as required by the generic clk framework.

Signed-off-by: Prashant Gaikwad <pgaikwad-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
This patch should go through Tegra tree since other patches to port Tegra
to generic clock framework are dependent on it. Posting here to get ack from
the maintainers.

 drivers/spi/spi-tegra.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-tegra.c b/drivers/spi/spi-tegra.c
index ae6d78a..7f99ff3 100644
--- a/drivers/spi/spi-tegra.c
+++ b/drivers/spi/spi-tegra.c
@@ -261,7 +261,7 @@ static void spi_tegra_start_transfer(struct spi_device *spi,
 		clk_set_rate(tspi->clk, speed);
 
 	if (tspi->cur_speed == 0)
-		clk_enable(tspi->clk);
+		clk_prepare_enable(tspi->clk);
 
 	tspi->cur_speed = speed;
 
@@ -373,7 +373,7 @@ static void tegra_spi_rx_dma_complete(struct tegra_dma_req *req)
 			spi = m->state;
 			spi_tegra_start_message(spi, m);
 		} else {
-			clk_disable(tspi->clk);
+			clk_disable_unprepare(tspi->clk);
 			tspi->cur_speed = 0;
 		}
 	}
-- 
1.7.4.1


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[PATCH v2 9/9] crypto: add clk_prepare/clk_unprepare

[Prashant Gaikwad]

Use clk_prepare/clk_unprepare as required by the generic clk framework.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
---
This patch should go through Tegra tree since other patches to port Tegra
to generic clock framework are dependent on it. Posting here to get ack from
the maintainers.

 drivers/crypto/tegra-aes.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/tegra-aes.c b/drivers/crypto/tegra-aes.c
index 422a976..ac236f6 100644
--- a/drivers/crypto/tegra-aes.c
+++ b/drivers/crypto/tegra-aes.c
@@ -572,7 +572,7 @@ static void aes_workqueue_handler(struct work_struct *work)
 	struct tegra_aes_dev *dd = aes_dev;
 	int ret;
 
-	ret = clk_enable(dd->aes_clk);
+	ret = clk_prepare_enable(dd->aes_clk);
 	if (ret)
 		BUG_ON("clock enable failed");
 
@@ -581,7 +581,7 @@ static void aes_workqueue_handler(struct work_struct *work)
 		ret = tegra_aes_handle_req(dd);
 	} while (!ret);
 
-	clk_disable(dd->aes_clk);
+	clk_disable_unprepare(dd->aes_clk);
 }
 
 static irqreturn_t aes_irq(int irq, void *dev_id)
@@ -673,7 +673,7 @@ static int tegra_aes_get_random(struct crypto_rng *tfm, u8 *rdata,
 	/* take mutex to access the aes hw */
 	mutex_lock(&aes_lock);
 
-	ret = clk_enable(dd->aes_clk);
+	ret = clk_prepare_enable(dd->aes_clk);
 	if (ret)
 		return ret;
 
@@ -700,7 +700,7 @@ static int tegra_aes_get_random(struct crypto_rng *tfm, u8 *rdata,
 	}
 
 out:
-	clk_disable(dd->aes_clk);
+	clk_disable_unprepare(dd->aes_clk);
 	mutex_unlock(&aes_lock);
 
 	dev_dbg(dd->dev, "%s: done\n", __func__);
@@ -758,7 +758,7 @@ static int tegra_aes_rng_reset(struct crypto_rng *tfm, u8 *seed,
 
 	dd->flags = FLAGS_ENCRYPT | FLAGS_RNG;
 
-	ret = clk_enable(dd->aes_clk);
+	ret = clk_prepare_enable(dd->aes_clk);
 	if (ret)
 		return ret;
 
@@ -788,7 +788,7 @@ static int tegra_aes_rng_reset(struct crypto_rng *tfm, u8 *seed,
 	memcpy(dd->dt, dt, DEFAULT_RNG_BLK_SZ);
 
 out:
-	clk_disable(dd->aes_clk);
+	clk_disable_unprepare(dd->aes_clk);
 	mutex_unlock(&aes_lock);
 
 	dev_dbg(dd->dev, "%s: done\n", __func__);
-- 
1.7.4.1

Re: [PATCH v2 5/9] Input: tegra-kbc - add clk_prepare/clk_unprepare

[Shubhrajyoti]

On Tuesday 05 June 2012 09:49 AM, Prashant Gaikwad wrote:
> Use clk_prepare/clk_unprepare as required by the generic clk framework.
Not a comment just curious to know what does

clk_prepare/clk_unprepare do differently vis a vis enable.

> Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
> ---