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Date: Thu, 25 Oct 2012 18:42:52 +0530
From: Prabhakar Lad <prabhakar.csengg@...il.com>
To: Murali Karicheri <m-karicheri2@...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
Hi Murali,
Thanks for the patch. I'll queue this patch for 3.8.
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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