linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Stephen Boyd <sboyd@codeaurora.org>
To: David Brown <davidb@codeaurora.org>,
	Daniel Walker <dwalker@fifo99.com>,
	Bryan Huntsman <bryanh@codeaurora.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Joerg Roedel <joerg.roedel@amd.com>
Subject: [PATCH/RESEND 05/12] msm: iommu: Convert to clk_prepare/unprepare
Date: Mon, 17 Jun 2013 10:43:12 -0700	[thread overview]
Message-ID: <1371490999-15501-6-git-send-email-sboyd@codeaurora.org> (raw)
In-Reply-To: <1371490999-15501-1-git-send-email-sboyd@codeaurora.org>

Add calls to clk_prepare and unprepare so that MSM can migrate to
the common clock framework. We never unprepare the clocks until
driver remove because the clocks are enabled and disabled in irq
context. Finer grained power management is possible in the future
via runtime power management techniques.

Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
 drivers/iommu/msm_iommu_dev.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/msm_iommu_dev.c b/drivers/iommu/msm_iommu_dev.c
index 8e8fb07..d344f6a 100644
--- a/drivers/iommu/msm_iommu_dev.c
+++ b/drivers/iommu/msm_iommu_dev.c
@@ -160,7 +160,7 @@ static int msm_iommu_probe(struct platform_device *pdev)
 		goto fail;
 	}
 
-	ret = clk_enable(iommu_pclk);
+	ret = clk_prepare_enable(iommu_pclk);
 	if (ret)
 		goto fail_enable;
 
@@ -170,7 +170,7 @@ static int msm_iommu_probe(struct platform_device *pdev)
 		if (clk_get_rate(iommu_clk) == 0)
 			clk_set_min_rate(iommu_clk, 1);
 
-		ret = clk_enable(iommu_clk);
+		ret = clk_prepare_enable(iommu_clk);
 		if (ret) {
 			clk_put(iommu_clk);
 			goto fail_pclk;
@@ -261,7 +261,7 @@ fail_clk:
 		clk_put(iommu_clk);
 	}
 fail_pclk:
-	clk_disable(iommu_pclk);
+	clk_disable_unprepare(iommu_pclk);
 fail_enable:
 	clk_put(iommu_pclk);
 fail:
@@ -275,8 +275,11 @@ static int msm_iommu_remove(struct platform_device *pdev)
 
 	drv = platform_get_drvdata(pdev);
 	if (drv) {
-		if (drv->clk)
+		if (drv->clk) {
+			clk_unprepare(drv->clk);
 			clk_put(drv->clk);
+		}
+		clk_unprepare(drv->pclk);
 		clk_put(drv->pclk);
 		memset(drv, 0, sizeof(*drv));
 		kfree(drv);
@@ -314,14 +317,14 @@ static int msm_iommu_ctx_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
 	platform_set_drvdata(pdev, ctx_drvdata);
 
-	ret = clk_enable(drvdata->pclk);
+	ret = clk_prepare_enable(drvdata->pclk);
 	if (ret)
 		goto fail;
 
 	if (drvdata->clk) {
-		ret = clk_enable(drvdata->clk);
+		ret = clk_prepare_enable(drvdata->clk);
 		if (ret) {
-			clk_disable(drvdata->pclk);
+			clk_disable_unprepare(drvdata->pclk);
 			goto fail;
 		}
 	}
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation


  parent reply	other threads:[~2013-06-17 17:45 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-17 17:43 [PATCH/RESEND 00/12] Convert MSM to common clock framework Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 01/12] msm_serial: Convert to clk_prepare/unprepare Stephen Boyd
2013-06-17 17:55   ` Greg Kroah-Hartman
2013-06-17 18:07     ` David Brown
2013-06-17 18:27       ` Greg Kroah-Hartman
2013-06-17 17:43 ` [PATCH/RESEND 02/12] msm_serial: Use devm_clk_get() and properly return errors Stephen Boyd
2013-06-17 17:55   ` Greg Kroah-Hartman
2013-06-17 17:43 ` [PATCH/RESEND 03/12] usb: otg: msm: Convert to clk_prepare/unprepare Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 04/12] msm_sdcc: " Stephen Boyd
2013-06-17 17:43 ` Stephen Boyd [this message]
2013-06-20 16:40   ` [PATCH/RESEND 05/12] msm: iommu: " Stephen Boyd
2013-06-20 17:04     ` Joerg Roedel
2013-06-17 17:43 ` [PATCH/RESEND 06/12] msm: iommu: Use clk_set_rate() instead of clk_set_min_rate() Stephen Boyd
2013-06-20 16:41   ` Stephen Boyd
2013-06-20 17:04     ` Joerg Roedel
2013-06-17 17:43 ` [PATCH/RESEND 07/12] ARM: msm: Remove custom clk_set_flags() API Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 08/12] ARM: msm: Remove custom clk_set_{max,min}_rate() API Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 09/12] ARM: msm: Remove clock-7x30.h include file Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 10/12] ARM: msm: Prepare clk_get() users in mach-msm for clock-pcom driver Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 11/12] ARM: msm: Make proc_comm clock control into a platform driver Stephen Boyd
2013-06-19 16:34   ` Stephen Boyd
2013-06-17 17:43 ` [PATCH/RESEND 12/12] ARM: msm: Migrate to common clock framework Stephen Boyd
2013-06-21  1:29 ` [PATCH/RESEND 00/12] Convert MSM " Stephen Boyd
2013-06-24 20:10   ` David Brown

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1371490999-15501-6-git-send-email-sboyd@codeaurora.org \
    --to=sboyd@codeaurora.org \
    --cc=bryanh@codeaurora.org \
    --cc=davidb@codeaurora.org \
    --cc=dwalker@fifo99.com \
    --cc=joerg.roedel@amd.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).