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Message-ID: <20141006184101.GB5524@developer>
Date: Mon, 6 Oct 2014 14:41:03 -0400
From: Eduardo Valentin <edubezval@...il.com>
To: Pramod Gurav <pramod.gurav@...rtplayin.com>
Cc: linux-kernel@...r.kernel.org,
Eduardo Valentin <eduardo.valentin@...com>,
Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org
Subject: Re: [PATCH] thermal: ti-soc-thermal: Switch to using managed
resources
Hello Pramod,
On Fri, Sep 19, 2014 at 11:35:09PM +0530, Pramod Gurav wrote:
> This change switches to managed resource APIs to allocated resources
> such as irq, clock. Hence does away with release statements of the
> same resorces in error lables and remove function.
>
> Cc: Eduardo Valentin <eduardo.valentin@...com>
> Cc: Zhang Rui <rui.zhang@...el.com>
> Cc: linux-pm@...r.kernel.org
> Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
> ---
> drivers/thermal/ti-soc-thermal/ti-bandgap.c | 46 ++++++++---------------------
> 1 file changed, 12 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
> index 634b6ce..e068dd5 100644
> --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
> +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
> @@ -1060,7 +1060,7 @@ static int ti_bandgap_tshut_init(struct ti_bandgap *bgp,
> int status;
>
> /* Request for gpio_86 line */
> - status = gpio_request(gpio_nr, "tshut");
> + status = devm_gpio_request(&pdev->dev, gpio_nr, "tshut");
> if (status < 0) {
> dev_err(bgp->dev, "Could not request for TSHUT GPIO:%i\n", 86);
> return status;
> @@ -1071,11 +1071,12 @@ static int ti_bandgap_tshut_init(struct ti_bandgap *bgp,
> return status;
> }
>
> - status = request_irq(gpio_to_irq(gpio_nr), ti_bandgap_tshut_irq_handler,
> - IRQF_TRIGGER_RISING, "tshut", NULL);
> + status = devm_request_irq(&pdev->dev, gpio_to_irq(gpio_nr),
> + ti_bandgap_tshut_irq_handler,
> + IRQF_TRIGGER_RISING, "tshut", NULL);
> if (status) {
> - gpio_free(gpio_nr);
> dev_err(bgp->dev, "request irq failed for TSHUT");
> + return status;
> }
>
> return 0;
> @@ -1104,7 +1105,7 @@ static int ti_bandgap_talert_init(struct ti_bandgap *bgp,
> dev_err(&pdev->dev, "get_irq failed\n");
> return bgp->irq;
> }
> - ret = request_threaded_irq(bgp->irq, NULL,
> + ret = devm_request_threaded_irq(&pdev->dev, bgp->irq, NULL,
> ti_bandgap_talert_irq_handler,
> IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
> "talert", bgp);
> @@ -1212,21 +1213,17 @@ int ti_bandgap_probe(struct platform_device *pdev)
> }
> }
>
> - bgp->fclock = clk_get(NULL, bgp->conf->fclock_name);
> - ret = IS_ERR(bgp->fclock);
> - if (ret) {
> + bgp->fclock = devm_clk_get(NULL, bgp->conf->fclock_name);
> + if (IS_ERR(bgp->fclock)) {
> dev_err(&pdev->dev, "failed to request fclock reference\n");
> - ret = PTR_ERR(bgp->fclock);
> - goto free_irqs;
> + return PTR_ERR(bgp->fclock);
> }
>
> - bgp->div_clk = clk_get(NULL, bgp->conf->div_ck_name);
> - ret = IS_ERR(bgp->div_clk);
> - if (ret) {
> + bgp->div_clk = devm_clk_get(NULL, bgp->conf->div_ck_name);
How the manager is supposed to handle and free the clocks' resources if
no dev is passed to devm_ functions?
> + if (IS_ERR(bgp->div_clk)) {
> dev_err(&pdev->dev,
> "failed to request div_ts_ck clock ref\n");
> - ret = PTR_ERR(bgp->div_clk);
> - goto free_irqs;
> + return PTR_ERR(bgp->div_clk);
> }
>
> for (i = 0; i < bgp->conf->sensor_count; i++) {
> @@ -1251,7 +1248,6 @@ int ti_bandgap_probe(struct platform_device *pdev)
> clk_rate <= 0) {
> ret = -ENODEV;
> dev_err(&pdev->dev, "wrong clock rate (%d)\n", clk_rate);
> - goto put_clks;
> }
>
> ret = clk_set_rate(bgp->div_clk, clk_rate);
> @@ -1357,14 +1353,6 @@ remove_sensors:
> disable_clk:
> if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
> clk_disable_unprepare(bgp->fclock);
> -put_clks:
> - clk_put(bgp->fclock);
> - clk_put(bgp->div_clk);
> -free_irqs:
> - if (TI_BANDGAP_HAS(bgp, TSHUT)) {
> - free_irq(gpio_to_irq(bgp->tshut_gpio), NULL);
> - gpio_free(bgp->tshut_gpio);
> - }
>
> return ret;
> }
> @@ -1388,16 +1376,6 @@ int ti_bandgap_remove(struct platform_device *pdev)
>
> if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
> clk_disable_unprepare(bgp->fclock);
> - clk_put(bgp->fclock);
> - clk_put(bgp->div_clk);
> -
> - if (TI_BANDGAP_HAS(bgp, TALERT))
> - free_irq(bgp->irq, bgp);
> -
> - if (TI_BANDGAP_HAS(bgp, TSHUT)) {
> - free_irq(gpio_to_irq(bgp->tshut_gpio), NULL);
> - gpio_free(bgp->tshut_gpio);
> - }
>
> return 0;
> }
> --
> 1.8.3.2
>
> --
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