From: Trilok Soni <tsoni@codeaurora.org>
To: Stepan Moskovchenko <stepanm@codeaurora.org>
Cc: davidb@codeaurora.org, linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] msm: iommu: Rework clock logic and add IOMMU bus clock control
Date: Fri, 25 Feb 2011 12:59:06 +0530 [thread overview]
Message-ID: <4D675A42.9090803@codeaurora.org> (raw)
In-Reply-To: <1298599242-21971-2-git-send-email-stepanm@codeaurora.org>
Hi Steve,
>
> /**
> diff --git a/arch/arm/mach-msm/iommu_dev.c b/arch/arm/mach-msm/iommu_dev.c
> index b83c73b..69acd1e 100644
> --- a/arch/arm/mach-msm/iommu_dev.c
> +++ b/arch/arm/mach-msm/iommu_dev.c
> @@ -1,4 +1,4 @@
> -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
> +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License version 2 and
> @@ -29,6 +29,7 @@
>
> #include <mach/iommu_hw-8xxx.h>
> #include <mach/iommu.h>
> +#include <mach/clk.h>
>
> struct iommu_ctx_iter_data {
> /* input */
> @@ -130,117 +131,134 @@ static int msm_iommu_probe(struct platform_device *pdev)
> {
> struct resource *r, *r2;
> struct clk *iommu_clk;
> + struct clk *iommu_pclk;
> struct msm_iommu_drvdata *drvdata;
> struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
const please.
> + iommu_pclk = clk_get(NULL, "smmu_pclk");
> + if (IS_ERR(iommu_pclk)) {
> + ret = -ENODEV;
> + goto fail;
> + }
I am not a big fan of this when you have the "device" around. You should just do
iommu_pclk = clk_get(&pdev->dev, NULL);
...error logic...
iommu_clk = clk_get(&pdev->dev, "iommu_clk");
...error logic...
> +
> + ret = clk_enable(iommu_pclk);
> + if (ret)
> + goto fail_enable;
> +
> + iommu_clk = clk_get(&pdev->dev, "iommu_clk");
> +
> + if (!IS_ERR(iommu_clk)) {
> + if (clk_get_rate(iommu_clk) == 0)
> + clk_set_min_rate(iommu_clk, 1);
> +
> + ret = clk_enable(iommu_clk);
> + if (ret) {
> clk_put(iommu_clk);
> + goto fail_pclk;
> }
> + } else
> + iommu_clk = NULL;
>
> - r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> - "physbase");
> - if (!r) {
> - ret = -ENODEV;
> - goto fail;
> - }
> + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
>
> - len = r->end - r->start + 1;
> + if (!r) {
> + ret = -ENODEV;
> + goto fail_clk;
> + }
>
> - r2 = request_mem_region(r->start, len, r->name);
> - if (!r2) {
> - pr_err("Could not request memory region: "
> - "start=%p, len=%d\n", (void *) r->start, len);
> - ret = -EBUSY;
> - goto fail;
> - }
> + len = r->end - r->start + 1;
resource_size please.
---Trilok Soni
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
WARNING: multiple messages have this Message-ID (diff)
From: tsoni@codeaurora.org (Trilok Soni)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/4] msm: iommu: Rework clock logic and add IOMMU bus clock control
Date: Fri, 25 Feb 2011 12:59:06 +0530 [thread overview]
Message-ID: <4D675A42.9090803@codeaurora.org> (raw)
In-Reply-To: <1298599242-21971-2-git-send-email-stepanm@codeaurora.org>
Hi Steve,
>
> /**
> diff --git a/arch/arm/mach-msm/iommu_dev.c b/arch/arm/mach-msm/iommu_dev.c
> index b83c73b..69acd1e 100644
> --- a/arch/arm/mach-msm/iommu_dev.c
> +++ b/arch/arm/mach-msm/iommu_dev.c
> @@ -1,4 +1,4 @@
> -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
> +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License version 2 and
> @@ -29,6 +29,7 @@
>
> #include <mach/iommu_hw-8xxx.h>
> #include <mach/iommu.h>
> +#include <mach/clk.h>
>
> struct iommu_ctx_iter_data {
> /* input */
> @@ -130,117 +131,134 @@ static int msm_iommu_probe(struct platform_device *pdev)
> {
> struct resource *r, *r2;
> struct clk *iommu_clk;
> + struct clk *iommu_pclk;
> struct msm_iommu_drvdata *drvdata;
> struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
const please.
> + iommu_pclk = clk_get(NULL, "smmu_pclk");
> + if (IS_ERR(iommu_pclk)) {
> + ret = -ENODEV;
> + goto fail;
> + }
I am not a big fan of this when you have the "device" around. You should just do
iommu_pclk = clk_get(&pdev->dev, NULL);
...error logic...
iommu_clk = clk_get(&pdev->dev, "iommu_clk");
...error logic...
> +
> + ret = clk_enable(iommu_pclk);
> + if (ret)
> + goto fail_enable;
> +
> + iommu_clk = clk_get(&pdev->dev, "iommu_clk");
> +
> + if (!IS_ERR(iommu_clk)) {
> + if (clk_get_rate(iommu_clk) == 0)
> + clk_set_min_rate(iommu_clk, 1);
> +
> + ret = clk_enable(iommu_clk);
> + if (ret) {
> clk_put(iommu_clk);
> + goto fail_pclk;
> }
> + } else
> + iommu_clk = NULL;
>
> - r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> - "physbase");
> - if (!r) {
> - ret = -ENODEV;
> - goto fail;
> - }
> + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
>
> - len = r->end - r->start + 1;
> + if (!r) {
> + ret = -ENODEV;
> + goto fail_clk;
> + }
>
> - r2 = request_mem_region(r->start, len, r->name);
> - if (!r2) {
> - pr_err("Could not request memory region: "
> - "start=%p, len=%d\n", (void *) r->start, len);
> - ret = -EBUSY;
> - goto fail;
> - }
> + len = r->end - r->start + 1;
resource_size please.
---Trilok Soni
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
next prev parent reply other threads:[~2011-02-25 7:29 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-25 2:00 [PATCH 1/4] msm: iommu: Clock control for the IOMMU driver Stepan Moskovchenko
2011-02-25 2:00 ` Stepan Moskovchenko
2011-02-25 2:00 ` [PATCH 2/4] msm: iommu: Rework clock logic and add IOMMU bus clock control Stepan Moskovchenko
2011-02-25 2:00 ` Stepan Moskovchenko
2011-02-25 7:29 ` Trilok Soni [this message]
2011-02-25 7:29 ` Trilok Soni
2011-02-25 22:09 ` Stepan Moskovchenko
2011-02-25 22:09 ` Stepan Moskovchenko
2011-02-28 12:13 ` Trilok Soni
2011-02-28 12:13 ` Trilok Soni
2011-03-01 0:03 ` [PATCH v2 " Stepan Moskovchenko
2011-03-01 0:03 ` Stepan Moskovchenko
2011-03-01 7:15 ` Trilok Soni
2011-03-01 7:15 ` Trilok Soni
2011-02-25 2:00 ` [PATCH 3/4] msm: iommu: Use ASID tagging instead of VMID tagging Stepan Moskovchenko
2011-02-25 2:00 ` Stepan Moskovchenko
2011-02-25 2:00 ` [PATCH 4/4] msm: iommu: Remove dependency on IDR Stepan Moskovchenko
2011-02-25 2:00 ` Stepan Moskovchenko
2011-03-08 23:43 ` [PATCH 1/4] msm: iommu: Clock control for the IOMMU driver David Brown
2011-03-08 23:43 ` David Brown
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