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Date: Fri, 26 Oct 2012 11:52:50 -0400
From: Murali Karicheri <m-karicheri2@...com>
To: Prabhakar Lad <prabhakar.csengg@...il.com>
CC: <mchehab@...radead.org>, <laurent.pinchart@...asonboard.com>,
<manjunath.hadli@...com>, <prabhakar.lad@...com>,
<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<davinci-linux-open-source@...ux.davincidsp.com>
Subject: Re: [RESEND-PATCH] media:davinci: clk - {prepare/unprepare} for common
clk
On 10/25/2012 09:12 AM, Prabhakar Lad wrote:
> Hi Murali,
>
> Thanks for the patch. I'll queue this patch for 3.8.
Please check with Sekhar as well. This is a preparation patch for common
clk framework support. ALso fixes some bugs on the existing code. As the
clk
patches are dependent on these patches, I would suggest you queue this
against 3.7 rcx.
Murali
>
> On Mon, Oct 22, 2012 at 9:06 PM, Murali Karicheri <m-karicheri2@...com> wrote:
>> As a first step towards migrating davinci platforms to use common clock
>> framework, replace all instances of clk_enable() with clk_prepare_enable()
>> and clk_disable() with clk_disable_unprepare().
>>
>> Also fixes some issues related to clk clean up in the driver
>>
>> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
> Acked-by: Lad, Prabhakar <prabhakar.lad@...com>
> Tested-by: Lad, Prabhakar <prabhakar.lad@...com>
>
> Regards,
> --Prabhakar
>
>> ---
>> rebased to v3.7-rc1
>>
>> drivers/media/platform/davinci/dm355_ccdc.c | 8 ++++++--
>> drivers/media/platform/davinci/dm644x_ccdc.c | 16 ++++++++++------
>> drivers/media/platform/davinci/isif.c | 5 ++++-
>> drivers/media/platform/davinci/vpbe.c | 10 +++++++---
>> drivers/media/platform/davinci/vpif.c | 8 ++++----
>> 5 files changed, 31 insertions(+), 16 deletions(-)
>>
>> diff --git a/drivers/media/platform/davinci/dm355_ccdc.c b/drivers/media/platform/davinci/dm355_ccdc.c
>> index ce0e413..030950d 100644
>> --- a/drivers/media/platform/davinci/dm355_ccdc.c
>> +++ b/drivers/media/platform/davinci/dm355_ccdc.c
>> @@ -1003,7 +1003,7 @@ static int __devinit dm355_ccdc_probe(struct platform_device *pdev)
>> status = PTR_ERR(ccdc_cfg.mclk);
>> goto fail_nomap;
>> }
>> - if (clk_enable(ccdc_cfg.mclk)) {
>> + if (clk_prepare_enable(ccdc_cfg.mclk)) {
>> status = -ENODEV;
>> goto fail_mclk;
>> }
>> @@ -1014,7 +1014,7 @@ static int __devinit dm355_ccdc_probe(struct platform_device *pdev)
>> status = PTR_ERR(ccdc_cfg.sclk);
>> goto fail_mclk;
>> }
>> - if (clk_enable(ccdc_cfg.sclk)) {
>> + if (clk_prepare_enable(ccdc_cfg.sclk)) {
>> status = -ENODEV;
>> goto fail_sclk;
>> }
>> @@ -1034,8 +1034,10 @@ static int __devinit dm355_ccdc_probe(struct platform_device *pdev)
>> printk(KERN_NOTICE "%s is registered with vpfe.\n", ccdc_hw_dev.name);
>> return 0;
>> fail_sclk:
>> + clk_disable_unprepare(ccdc_cfg.sclk);
>> clk_put(ccdc_cfg.sclk);
>> fail_mclk:
>> + clk_disable_unprepare(ccdc_cfg.mclk);
>> clk_put(ccdc_cfg.mclk);
>> fail_nomap:
>> iounmap(ccdc_cfg.base_addr);
>> @@ -1050,6 +1052,8 @@ static int dm355_ccdc_remove(struct platform_device *pdev)
>> {
>> struct resource *res;
>>
>> + clk_disable_unprepare(ccdc_cfg.sclk);
>> + clk_disable_unprepare(ccdc_cfg.mclk);
>> clk_put(ccdc_cfg.mclk);
>> clk_put(ccdc_cfg.sclk);
>> iounmap(ccdc_cfg.base_addr);
>> diff --git a/drivers/media/platform/davinci/dm644x_ccdc.c b/drivers/media/platform/davinci/dm644x_ccdc.c
>> index ee7942b..0215ab6 100644
>> --- a/drivers/media/platform/davinci/dm644x_ccdc.c
>> +++ b/drivers/media/platform/davinci/dm644x_ccdc.c
>> @@ -994,7 +994,7 @@ static int __devinit dm644x_ccdc_probe(struct platform_device *pdev)
>> status = PTR_ERR(ccdc_cfg.mclk);
>> goto fail_nomap;
>> }
>> - if (clk_enable(ccdc_cfg.mclk)) {
>> + if (clk_prepare_enable(ccdc_cfg.mclk)) {
>> status = -ENODEV;
>> goto fail_mclk;
>> }
>> @@ -1005,7 +1005,7 @@ static int __devinit dm644x_ccdc_probe(struct platform_device *pdev)
>> status = PTR_ERR(ccdc_cfg.sclk);
>> goto fail_mclk;
>> }
>> - if (clk_enable(ccdc_cfg.sclk)) {
>> + if (clk_prepare_enable(ccdc_cfg.sclk)) {
>> status = -ENODEV;
>> goto fail_sclk;
>> }
>> @@ -1013,8 +1013,10 @@ static int __devinit dm644x_ccdc_probe(struct platform_device *pdev)
>> printk(KERN_NOTICE "%s is registered with vpfe.\n", ccdc_hw_dev.name);
>> return 0;
>> fail_sclk:
>> + clk_disable_unprepare(ccdc_cfg.sclk);
>> clk_put(ccdc_cfg.sclk);
>> fail_mclk:
>> + clk_disable_unprepare(ccdc_cfg.mclk);
>> clk_put(ccdc_cfg.mclk);
>> fail_nomap:
>> iounmap(ccdc_cfg.base_addr);
>> @@ -1029,6 +1031,8 @@ static int dm644x_ccdc_remove(struct platform_device *pdev)
>> {
>> struct resource *res;
>>
>> + clk_disable_unprepare(ccdc_cfg.mclk);
>> + clk_disable_unprepare(ccdc_cfg.sclk);
>> clk_put(ccdc_cfg.mclk);
>> clk_put(ccdc_cfg.sclk);
>> iounmap(ccdc_cfg.base_addr);
>> @@ -1046,8 +1050,8 @@ static int dm644x_ccdc_suspend(struct device *dev)
>> /* Disable CCDC */
>> ccdc_enable(0);
>> /* Disable both master and slave clock */
>> - clk_disable(ccdc_cfg.mclk);
>> - clk_disable(ccdc_cfg.sclk);
>> + clk_disable_unprepare(ccdc_cfg.mclk);
>> + clk_disable_unprepare(ccdc_cfg.sclk);
>>
>> return 0;
>> }
>> @@ -1055,8 +1059,8 @@ static int dm644x_ccdc_suspend(struct device *dev)
>> static int dm644x_ccdc_resume(struct device *dev)
>> {
>> /* Enable both master and slave clock */
>> - clk_enable(ccdc_cfg.mclk);
>> - clk_enable(ccdc_cfg.sclk);
>> + clk_prepare_enable(ccdc_cfg.mclk);
>> + clk_prepare_enable(ccdc_cfg.sclk);
>> /* Restore CCDC context */
>> ccdc_restore_context();
>>
>> diff --git a/drivers/media/platform/davinci/isif.c b/drivers/media/platform/davinci/isif.c
>> index b99d542..2c26c3e 100644
>> --- a/drivers/media/platform/davinci/isif.c
>> +++ b/drivers/media/platform/davinci/isif.c
>> @@ -1053,7 +1053,7 @@ static int __devinit isif_probe(struct platform_device *pdev)
>> status = PTR_ERR(isif_cfg.mclk);
>> goto fail_mclk;
>> }
>> - if (clk_enable(isif_cfg.mclk)) {
>> + if (clk_prepare_enable(isif_cfg.mclk)) {
>> status = -ENODEV;
>> goto fail_mclk;
>> }
>> @@ -1125,6 +1125,7 @@ fail_nobase_res:
>> i--;
>> }
>> fail_mclk:
>> + clk_disable_unprepare(isif_cfg.mclk);
>> clk_put(isif_cfg.mclk);
>> vpfe_unregister_ccdc_device(&isif_hw_dev);
>> return status;
>> @@ -1145,6 +1146,8 @@ static int isif_remove(struct platform_device *pdev)
>> i++;
>> }
>> vpfe_unregister_ccdc_device(&isif_hw_dev);
>> + clk_disable_unprepare(isif_cfg.mclk);
>> + clk_put(isif_cfg.mclk);
>> return 0;
>> }
>>
>> diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c
>> index 69d7a58..7f5cf9b 100644
>> --- a/drivers/media/platform/davinci/vpbe.c
>> +++ b/drivers/media/platform/davinci/vpbe.c
>> @@ -612,7 +612,7 @@ static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev)
>> ret = PTR_ERR(vpbe_dev->dac_clk);
>> goto fail_mutex_unlock;
>> }
>> - if (clk_enable(vpbe_dev->dac_clk)) {
>> + if (clk_prepare_enable(vpbe_dev->dac_clk)) {
>> ret = -ENODEV;
>> goto fail_mutex_unlock;
>> }
>> @@ -759,8 +759,10 @@ fail_kfree_encoders:
>> fail_dev_unregister:
>> v4l2_device_unregister(&vpbe_dev->v4l2_dev);
>> fail_clk_put:
>> - if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0)
>> + if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
>> + clk_disable_unprepare(vpbe_dev->dac_clk);
>> clk_put(vpbe_dev->dac_clk);
>> + }
>> fail_mutex_unlock:
>> mutex_unlock(&vpbe_dev->lock);
>> return ret;
>> @@ -777,8 +779,10 @@ fail_mutex_unlock:
>> static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev)
>> {
>> v4l2_device_unregister(&vpbe_dev->v4l2_dev);
>> - if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0)
>> + if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) {
>> + clk_disable_unprepare(vpbe_dev->dac_clk);
>> clk_put(vpbe_dev->dac_clk);
>> + }
>>
>> kfree(vpbe_dev->amp);
>> kfree(vpbe_dev->encoders);
>> diff --git a/drivers/media/platform/davinci/vpif.c b/drivers/media/platform/davinci/vpif.c
>> index cff3c0a..0d6cc8e 100644
>> --- a/drivers/media/platform/davinci/vpif.c
>> +++ b/drivers/media/platform/davinci/vpif.c
>> @@ -444,7 +444,7 @@ static int __devinit vpif_probe(struct platform_device *pdev)
>> status = PTR_ERR(vpif_clk);
>> goto clk_fail;
>> }
>> - clk_enable(vpif_clk);
>> + clk_prepare_enable(vpif_clk);
>>
>> spin_lock_init(&vpif_lock);
>> dev_info(&pdev->dev, "vpif probe success\n");
>> @@ -460,7 +460,7 @@ fail:
>> static int __devexit vpif_remove(struct platform_device *pdev)
>> {
>> if (vpif_clk) {
>> - clk_disable(vpif_clk);
>> + clk_disable_unprepare(vpif_clk);
>> clk_put(vpif_clk);
>> }
>>
>> @@ -472,13 +472,13 @@ static int __devexit vpif_remove(struct platform_device *pdev)
>> #ifdef CONFIG_PM
>> static int vpif_suspend(struct device *dev)
>> {
>> - clk_disable(vpif_clk);
>> + clk_disable_unprepare(vpif_clk);
>> return 0;
>> }
>>
>> static int vpif_resume(struct device *dev)
>> {
>> - clk_enable(vpif_clk);
>> + clk_prepare_enable(vpif_clk);
>> return 0;
>> }
>>
>> --
>> 1.7.9.5
>>
>> --
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