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Date: Fri, 7 Nov 2014 14:11:26 -0400
From: Eduardo Valentin <edubezval@...il.com>
To: Pramod Gurav <pramod.gurav@...rtplayin.com>
Cc: linux-kernel@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
linux-pm@...r.kernel.org
Subject: Re: [PATCH v3] thermal: ti-soc-thermal: Switch to using managed
resources
Hello Pramod,
On Fri, Oct 10, 2014 at 11:32:12AM +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 <edubezval@...il.com>
> Cc: Zhang Rui <rui.zhang@...el.com>
> Cc: linux-pm@...r.kernel.org
> Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
>
> ---
> Changes since v2:
> - fix failure path of clk_get_rate by returning error.
> Change since v1:
> - Passing struct device to devm_clk_get was missing. Fix the same in v2.
>
Thanks for updating your patch. Apologize for my late answer.
> drivers/thermal/ti-soc-thermal/ti-bandgap.c | 58 ++++++++-------------------
> 1 file changed, 16 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
> index 634b6ce..22ad68e 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;
> @@ -1071,14 +1071,13 @@ 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);
> - if (status) {
> - gpio_free(gpio_nr);
> + status = devm_request_irq(&pdev->dev, gpio_to_irq(gpio_nr),
> + ti_bandgap_tshut_irq_handler,
> + IRQF_TRIGGER_RISING, "tshut", NULL);
> + if (status)
> dev_err(bgp->dev, "request irq failed for TSHUT");
> - }
>
> - return 0;
> + return status;
> }
>
> /**
> @@ -1104,16 +1103,14 @@ 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);
> - if (ret) {
> + if (ret)
> dev_err(&pdev->dev, "Request threaded irq failed.\n");
> - return ret;
> - }
>
> - return 0;
> + return ret;
> }
>
> static const struct of_device_id of_ti_bandgap_match[];
> @@ -1212,21 +1209,17 @@ 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(&pdev->dev, 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(&pdev->dev, bgp->conf->div_ck_name);
> + 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);
> }
>
This part is a little tricky. What board have you tried this patch? Are
you sure that now passing the struct device * you are really receiving
the clk struct?
The thing is, from top of my head, in order to pass the struct device *
you need also to change the OMAP clk data structures under arch/arm/.
And remember, for all the supported chips in this driver.
Have you check that?
Please, let me know how you tested this patch.
Cheers,
Eduardo Valentin
> for (i = 0; i < bgp->conf->sensor_count; i++) {
> @@ -1249,9 +1242,8 @@ int ti_bandgap_probe(struct platform_device *pdev)
> bgp->conf->sensors[0].ts_data->max_freq);
> if (clk_rate < bgp->conf->sensors[0].ts_data->min_freq ||
> clk_rate <= 0) {
> - ret = -ENODEV;
> dev_err(&pdev->dev, "wrong clock rate (%d)\n", clk_rate);
> - goto put_clks;
> + return -ENODEV;
> }
>
> ret = clk_set_rate(bgp->div_clk, clk_rate);
> @@ -1357,14 +1349,6 @@ 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 +1372,6 @@ 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;
> }
> --
> 1.7.9.5
>
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