From: s.nawrocki@samsung•com (Sylwester Nawrocki)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH V2 1/6] clk: exynos-audss: convert to platform device
Date: Tue, 24 Sep 2013 11:35:27 +0200 [thread overview]
Message-ID: <52415CDF.4090002@samsung.com> (raw)
In-Reply-To: <1379982078-23381-1-git-send-email-abrestic@chromium.org>
Hi,
On 24/09/13 02:21, Andrew Bresticker wrote:
> @@ -62,24 +64,29 @@ static struct syscore_ops exynos_audss_clk_syscore_ops = {
> #endif /* CONFIG_PM_SLEEP */
>
> /* register exynos_audss clocks */
> -static void __init exynos_audss_clk_init(struct device_node *np)
> +static int exynos_audss_clk_probe(struct platform_device *pdev)
> {
> - reg_base = of_iomap(np, 0);
> - if (!reg_base) {
> - pr_err("%s: failed to map audss registers\n", __func__);
> - return;
> + struct resource *res;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + reg_base = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(reg_base)) {
> + dev_err(&pdev->dev, "failed to map audss registers\n");
> + return PTR_ERR(reg_base);
> }
>
> - clk_table = kzalloc(sizeof(struct clk *) * EXYNOS_AUDSS_MAX_CLKS,
> + clk_table = devm_kzalloc(&pdev->dev,
> + sizeof(struct clk *) * EXYNOS_AUDSS_MAX_CLKS,
> GFP_KERNEL);
> if (!clk_table) {
> - pr_err("%s: could not allocate clk lookup table\n", __func__);
> - return;
> + dev_err(&pdev->dev, "could not allocate clk lookup table\n");
You could drop this error log, k*alloc() functions already log any errors.
> + return -ENOMEM;
> }
>
> clk_data.clks = clk_table;
> clk_data.clk_num = EXYNOS_AUDSS_MAX_CLKS;
> - of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
> + of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get,
> + &clk_data);
> clk_table[EXYNOS_MOUT_AUDSS] = clk_register_mux(NULL, "mout_audss",
> mout_audss_p, ARRAY_SIZE(mout_audss_p),
> @@ -128,8 +135,53 @@ static void __init exynos_audss_clk_init(struct device_node *np)
> #endif
>
> pr_info("Exynos: Audss: clock setup completed\n");
> +
> + return 0;
> +}
> +
> +static int exynos_audss_clk_remove(struct platform_device *pdev)
> +{
> + int i;
> +
> + for (i = 0; i < EXYNOS_AUDSS_MAX_CLKS; i++) {
> + if (clk_table[i])
This would need to be:
if (!IS_ERR(clk_table[i]))
Note the clock provider should be unregistered first, to avoid potential
race condition, where the clock provider returns an invalid pointer to
a clock, which has already been unregistered and freed.
I just noticed the sequence in probe needs to be fixed as well. i.e.
clocks should be created with clk_register() before the clock provider
is actually registered. It might warrant a separate patch but it's
probably also fine to make such change part of this patch.
> + clk_unregister(clk_table[i]);
> + }
> +
> + of_clk_del_provider(pdev->dev.of_node);
> +
> + return 0;
> }
--
Thanks,
Sylwester
next prev parent reply other threads:[~2013-09-24 9:35 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-20 21:13 [PATCH 1/6] clk: exynos-audss: convert to platform device Andrew Bresticker
2013-09-20 21:13 ` [PATCH 2/6] clk: exynos-audss: allow input clocks to be specified in device tree Andrew Bresticker
2013-09-21 15:12 ` Tomasz Figa
2013-09-20 21:13 ` [PATCH 3/6] clk: exynos5250: add clock ID for div_pcm0 Andrew Bresticker
2013-09-21 15:19 ` Tomasz Figa
2013-09-20 21:13 ` [PATCH 4/6] ARM: dts: exynos5250: add sclk_pcm_in to audss clock controller Andrew Bresticker
2013-09-21 15:13 ` Tomasz Figa
2013-09-20 21:13 ` [PATCH 5/6] clk: exynos-audss: add support for Exynos 5420 Andrew Bresticker
2013-09-21 15:17 ` Tomasz Figa
2013-09-20 21:13 ` [PATCH 6/6] ARM: dts: exynos5420: add sclk_pcm_in to audss clock controller Andrew Bresticker
2013-09-21 15:18 ` Tomasz Figa
2013-09-21 12:50 ` [PATCH 1/6] clk: exynos-audss: convert to platform device Tomasz Figa
2013-09-23 21:25 ` Andrew Bresticker
2013-09-23 21:30 ` Tomasz Figa
2013-09-23 21:36 ` Andrew Bresticker
2013-09-23 22:50 ` Sylwester Nawrocki
2013-09-24 0:21 ` [PATCH V2 " Andrew Bresticker
2013-09-24 0:21 ` [PATCH V2 2/6] clk: exynos-audss: allow input clocks to be specified in device tree Andrew Bresticker
2013-09-24 0:21 ` [PATCH V2 3/6] clk: exynos5250: add clock ID for div_pcm0 Andrew Bresticker
2013-09-24 0:21 ` [PATCH V2 4/6] ARM: dts: exynos5250: add input clocks to audss clock controller Andrew Bresticker
2013-09-24 0:21 ` [PATCH V2 5/6] clk: exynos-audss: add support for Exynos 5420 Andrew Bresticker
2013-09-24 0:21 ` [PATCH V2 6/6] ARM: dts: exynos5420: add input clocks to audss clock controller Andrew Bresticker
2013-09-24 9:20 ` [PATCH V2 1/6] clk: exynos-audss: convert to platform device Tomasz Figa
2013-09-24 9:47 ` Sylwester Nawrocki
2013-09-24 9:35 ` Sylwester Nawrocki [this message]
2013-09-24 18:06 ` [PATCH V3 " Andrew Bresticker
2013-09-24 18:06 ` [PATCH V3 2/6] clk: exynos-audss: allow input clocks to be specified in device tree Andrew Bresticker
2013-09-24 18:06 ` [PATCH V3 3/6] clk: exynos5250: add clock ID for div_pcm0 Andrew Bresticker
2013-09-24 18:06 ` [PATCH V3 4/6] ARM: dts: exynos5250: add input clocks to audss clock controller Andrew Bresticker
2013-09-24 18:06 ` [PATCH V3 5/6] clk: exynos-audss: add support for Exynos 5420 Andrew Bresticker
2013-09-24 18:06 ` [PATCH V3 6/6] ARM: dts: exynos5420: add input clocks to audss clock controller Andrew Bresticker
2013-09-24 19:17 ` [PATCH V3 1/6] clk: exynos-audss: convert to platform device Tomasz Figa
2013-09-24 21:15 ` Sylwester Nawrocki
2013-09-24 22:12 ` Andrew Bresticker
2013-09-24 22:16 ` Stephen Boyd
2013-09-25 21:12 ` [PATCH V4 " Andrew Bresticker
2013-09-25 21:12 ` [PATCH V4 2/6] clk: exynos-audss: allow input clocks to be specified in device tree Andrew Bresticker
2013-09-25 21:12 ` [PATCH V4 3/6] clk: exynos5250: add clock ID for div_pcm0 Andrew Bresticker
2013-09-25 21:12 ` [PATCH V4 4/6] ARM: dts: exynos5250: add input clocks to audss clock controller Andrew Bresticker
2013-09-25 21:12 ` [PATCH V4 5/6] clk: exynos-audss: add support for Exynos 5420 Andrew Bresticker
2013-09-25 21:12 ` [PATCH V4 6/6] ARM: dts: exynos5420: add input clocks to audss clock controller Andrew Bresticker
2013-10-08 16:53 ` [PATCH V4 1/6] clk: exynos-audss: convert to platform device Andrew Bresticker
2013-11-26 6:29 ` Padma Venkat
2013-11-27 18:41 ` Mike Turquette
2013-12-01 22:43 ` Kukjin Kim
2014-01-02 15:20 ` Tomasz Figa
2014-01-04 2:47 ` kgene at kernel.org
2013-11-27 18:40 ` Mike Turquette
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=52415CDF.4090002@samsung.com \
--to=s.nawrocki@samsung$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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