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Date: Thu, 6 Mar 2014 21:15:20 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: Roger Quadros <rogerq@...com>, <tony@...mide.com>, <balbi@...com>
CC: <george.cherian@...com>, <balajitk@...com>, <hdegoede@...hat.com>,
<linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-usb@...r.kernel.org>, <linux-ide@...r.kernel.org>,
Benoît Cousson
<bcousson@...libre.com>
Subject: Re: [PATCH v2 04/13] phy: ti-pipe3: cleanup clock handling
Roger,
On Thursday 06 March 2014 08:08 PM, Roger Quadros wrote:
> As this driver is no longer USB specific, use generic clock names.
> - Use 'wkupclk', 'sysclk' and 'refclk' clock-names. Update DT binding info.
> - Fix PLL_SD_SHIFT from 9 to 10
> - Don't separate prepare/unprepare clock from enable/disable. This
> ensures optimal power savings.
>
> Update omap5 usb3_phy device tree node.
>
> CC: Benoît Cousson <bcousson@...libre.com>
> CC: Tony Lindgren <tony@...mide.com>
> Signed-off-by: Roger Quadros <rogerq@...com>
> ---
> Documentation/devicetree/bindings/phy/ti-phy.txt | 12 ++++++
> arch/arm/boot/dts/omap5.dtsi | 7 ++-
> drivers/phy/phy-ti-pipe3.c | 55 ++++++++++++------------
Here you have to split the patch. omap5.dtsi should be a separate patch
to Tony. I could take only phy-ti-pipe3.c again since ti-phy.txt is only
in Felipe's branch.
Regards
Kishon
> 3 files changed, 46 insertions(+), 28 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
> index 28e674b..8d13349 100644
> --- a/Documentation/devicetree/bindings/phy/ti-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
> @@ -59,6 +59,12 @@ Required properties:
> filled in "reg".
> - #phy-cells: determine the number of cells that should be given in the
> phandle while referencing this phy.
> + - clocks: a list of phandles and clock-specifier pairs, one for each entry in
> + clock-names.
> + - clock-names: should include:
> + * "wkupclk" - wakup clock.
> + * "sysclk" - system clock.
> + * "refclk" - reference clock.
>
> Optional properties:
> - ctrl-module : phandle of the control module used by PHY driver to power on
> @@ -74,4 +80,10 @@ usb3phy@...84400 {
> reg-names = "phy_rx", "phy_tx", "pll_ctrl";
> ctrl-module = <&omap_control_usb>;
> #phy-cells = <0>;
> + clocks = <&usb_phy_cm_clk32k>,
> + <&sys_clkin>,
> + <&usb_otg_ss_refclk960m>;
> + clock-names = "wkupclk",
> + "sysclk",
> + "refclk";
> };
> diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
> index 859a800..e47601a 100644
> --- a/arch/arm/boot/dts/omap5.dtsi
> +++ b/arch/arm/boot/dts/omap5.dtsi
> @@ -778,7 +778,12 @@
> <0x4a084800 0x64>,
> <0x4a084c00 0x40>;
> reg-names = "phy_rx", "phy_tx", "pll_ctrl";
> - ctrl-module = <&omap_control_usb3phy>;
> + clocks = <&usb_phy_cm_clk32k>,
> + <&sys_clkin>,
> + <&usb_otg_ss_refclk960m>;
> + clock-names = "wkupclk",
> + "sysclk",
> + "refclk";
> #phy-cells = <0>;
> };
> };
> diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
> index fd029b1..211703c 100644
> --- a/drivers/phy/phy-ti-pipe3.c
> +++ b/drivers/phy/phy-ti-pipe3.c
> @@ -45,7 +45,7 @@
> #define PLL_SELFREQDCO_MASK 0x0000000E
> #define PLL_SELFREQDCO_SHIFT 0x1
> #define PLL_SD_MASK 0x0003FC00
> -#define PLL_SD_SHIFT 0x9
> +#define PLL_SD_SHIFT 10
> #define SET_PLL_GO 0x1
> #define PLL_TICOPWDN 0x10000
> #define PLL_LOCK 0x2
> @@ -72,7 +72,7 @@ struct ti_pipe3 {
> struct device *control_dev;
> struct clk *wkupclk;
> struct clk *sys_clk;
> - struct clk *optclk;
> + struct clk *refclk;
> };
>
> struct pipe3_dpll_map {
> @@ -270,23 +270,21 @@ static int ti_pipe3_probe(struct platform_device *pdev)
>
> phy->dev = &pdev->dev;
>
> - phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
> + phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
> if (IS_ERR(phy->wkupclk)) {
> - dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
> + dev_err(&pdev->dev, "unable to get wkupclk\n");
> return PTR_ERR(phy->wkupclk);
> }
> - clk_prepare(phy->wkupclk);
>
> - phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
> - if (IS_ERR(phy->optclk)) {
> - dev_err(&pdev->dev, "unable to get usb_otg_ss_refclk960m\n");
> - return PTR_ERR(phy->optclk);
> + phy->refclk = devm_clk_get(phy->dev, "refclk");
> + if (IS_ERR(phy->refclk)) {
> + dev_err(&pdev->dev, "unable to get refclk\n");
> + return PTR_ERR(phy->refclk);
> }
> - clk_prepare(phy->optclk);
>
> - phy->sys_clk = devm_clk_get(phy->dev, "sys_clkin");
> + phy->sys_clk = devm_clk_get(phy->dev, "sysclk");
> if (IS_ERR(phy->sys_clk)) {
> - pr_err("%s: unable to get sys_clkin\n", __func__);
> + dev_err(&pdev->dev, "unable to get sysclk\n");
> return -EINVAL;
> }
>
> @@ -326,10 +324,6 @@ static int ti_pipe3_probe(struct platform_device *pdev)
>
> static int ti_pipe3_remove(struct platform_device *pdev)
> {
> - struct ti_pipe3 *phy = platform_get_drvdata(pdev);
> -
> - clk_unprepare(phy->wkupclk);
> - clk_unprepare(phy->optclk);
> if (!pm_runtime_suspended(&pdev->dev))
> pm_runtime_put(&pdev->dev);
> pm_runtime_disable(&pdev->dev);
> @@ -343,8 +337,10 @@ static int ti_pipe3_runtime_suspend(struct device *dev)
> {
> struct ti_pipe3 *phy = dev_get_drvdata(dev);
>
> - clk_disable(phy->wkupclk);
> - clk_disable(phy->optclk);
> + if (!IS_ERR(phy->wkupclk))
> + clk_disable_unprepare(phy->wkupclk);
> + if (!IS_ERR(phy->refclk))
> + clk_disable_unprepare(phy->refclk);
>
> return 0;
> }
> @@ -354,22 +350,27 @@ static int ti_pipe3_runtime_resume(struct device *dev)
> u32 ret = 0;
> struct ti_pipe3 *phy = dev_get_drvdata(dev);
>
> - ret = clk_enable(phy->optclk);
> - if (ret) {
> - dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
> - goto err1;
> + if (!IS_ERR(phy->refclk)) {
> + ret = clk_prepare_enable(phy->refclk);
> + if (ret) {
> + dev_err(phy->dev, "Failed to enable refclk %d\n", ret);
> + goto err1;
> + }
> }
>
> - ret = clk_enable(phy->wkupclk);
> - if (ret) {
> - dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
> - goto err2;
> + if (!IS_ERR(phy->wkupclk)) {
> + ret = clk_prepare_enable(phy->wkupclk);
> + if (ret) {
> + dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
> + goto err2;
> + }
> }
>
> return 0;
>
> err2:
> - clk_disable(phy->optclk);
> + if (!IS_ERR(phy->refclk))
> + clk_disable_unprepare(phy->refclk);
>
> err1:
> return ret;
>
--
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