From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> To: alsa-devel@alsa-project.org, Mark Brown <broonie@kernel.org>, Liam Girdwood <lgirdwood@gmail.com> Cc: Masami Hiramatsu <masami.hiramatsu@linaro.org>, Jassi Brar <jaswinder.singh@linaro.org>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Subject: [PATCH] ASoC: uniphier: Fix double reset assersion when transitioning to suspend state Date: Tue, 20 Aug 2019 15:16:04 +0900 [thread overview] Message-ID: <1566281764-14059-1-git-send-email-hayashi.kunihiko@socionext.com> (raw) When transitioning to supend state, uniphier_aio_dai_suspend() is called and asserts reset lines and disables clocks. However, if there are two or more DAIs, uniphier_aio_dai_suspend() are called multiple times, and double reset assersion will cause. This patch defines the counter that has the number of DAIs at first, and whenever uniphier_aio_dai_suspend() are called, it decrements the counter. And only if the counter is zero, it asserts reset lines and disables clocks. In the same way, uniphier_aio_dai_resume() are called, it increments the counter after deasserting reset lines and enabling clocks. Fixes: 139a34200233 ("ASoC: uniphier: add support for UniPhier AIO CPU DAI driver") Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> --- sound/soc/uniphier/aio-cpu.c | 31 +++++++++++++++++++++---------- sound/soc/uniphier/aio.h | 1 + 2 files changed, 22 insertions(+), 10 deletions(-) diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c index ee90e6c..2ae582a 100644 --- a/sound/soc/uniphier/aio-cpu.c +++ b/sound/soc/uniphier/aio-cpu.c @@ -424,8 +424,11 @@ int uniphier_aio_dai_suspend(struct snd_soc_dai *dai) { struct uniphier_aio *aio = uniphier_priv(dai); - reset_control_assert(aio->chip->rst); - clk_disable_unprepare(aio->chip->clk); + aio->chip->num_wup_aios--; + if (!aio->chip->num_wup_aios) { + reset_control_assert(aio->chip->rst); + clk_disable_unprepare(aio->chip->clk); + } return 0; } @@ -439,13 +442,15 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) if (!aio->chip->active) return 0; - ret = clk_prepare_enable(aio->chip->clk); - if (ret) - return ret; + if (!aio->chip->num_wup_aios) { + ret = clk_prepare_enable(aio->chip->clk); + if (ret) + return ret; - ret = reset_control_deassert(aio->chip->rst); - if (ret) - goto err_out_clock; + ret = reset_control_deassert(aio->chip->rst); + if (ret) + goto err_out_clock; + } aio_iecout_set_enable(aio->chip, true); aio_chip_init(aio->chip); @@ -458,7 +463,7 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) ret = aio_init(sub); if (ret) - goto err_out_clock; + goto err_out_reset; if (!sub->setting) continue; @@ -466,11 +471,16 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) aio_port_reset(sub); aio_src_reset(sub); } + aio->chip->num_wup_aios++; return 0; +err_out_reset: + if (!aio->chip->num_wup_aios) + reset_control_assert(aio->chip->rst); err_out_clock: - clk_disable_unprepare(aio->chip->clk); + if (!aio->chip->num_wup_aios) + clk_disable_unprepare(aio->chip->clk); return ret; } @@ -619,6 +629,7 @@ int uniphier_aio_probe(struct platform_device *pdev) return PTR_ERR(chip->rst); chip->num_aios = chip->chip_spec->num_dais; + chip->num_wup_aios = chip->num_aios; chip->aios = devm_kcalloc(dev, chip->num_aios, sizeof(struct uniphier_aio), GFP_KERNEL); diff --git a/sound/soc/uniphier/aio.h b/sound/soc/uniphier/aio.h index ca6ccba..a7ff7e5 100644 --- a/sound/soc/uniphier/aio.h +++ b/sound/soc/uniphier/aio.h @@ -285,6 +285,7 @@ struct uniphier_aio_chip { struct uniphier_aio *aios; int num_aios; + int num_wup_aios; struct uniphier_aio_pll *plls; int num_plls; -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> To: alsa-devel@alsa-project.org, Mark Brown <broonie@kernel.org>, Liam Girdwood <lgirdwood@gmail.com> Cc: Jassi Brar <jaswinder.singh@linaro.org>, Kunihiko Hayashi <hayashi.kunihiko@socionext.com>, linux-arm-kernel@lists.infradead.org, Masami Hiramatsu <masami.hiramatsu@linaro.org>, linux-kernel@vger.kernel.org Subject: [PATCH] ASoC: uniphier: Fix double reset assersion when transitioning to suspend state Date: Tue, 20 Aug 2019 15:16:04 +0900 [thread overview] Message-ID: <1566281764-14059-1-git-send-email-hayashi.kunihiko@socionext.com> (raw) When transitioning to supend state, uniphier_aio_dai_suspend() is called and asserts reset lines and disables clocks. However, if there are two or more DAIs, uniphier_aio_dai_suspend() are called multiple times, and double reset assersion will cause. This patch defines the counter that has the number of DAIs at first, and whenever uniphier_aio_dai_suspend() are called, it decrements the counter. And only if the counter is zero, it asserts reset lines and disables clocks. In the same way, uniphier_aio_dai_resume() are called, it increments the counter after deasserting reset lines and enabling clocks. Fixes: 139a34200233 ("ASoC: uniphier: add support for UniPhier AIO CPU DAI driver") Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> --- sound/soc/uniphier/aio-cpu.c | 31 +++++++++++++++++++++---------- sound/soc/uniphier/aio.h | 1 + 2 files changed, 22 insertions(+), 10 deletions(-) diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c index ee90e6c..2ae582a 100644 --- a/sound/soc/uniphier/aio-cpu.c +++ b/sound/soc/uniphier/aio-cpu.c @@ -424,8 +424,11 @@ int uniphier_aio_dai_suspend(struct snd_soc_dai *dai) { struct uniphier_aio *aio = uniphier_priv(dai); - reset_control_assert(aio->chip->rst); - clk_disable_unprepare(aio->chip->clk); + aio->chip->num_wup_aios--; + if (!aio->chip->num_wup_aios) { + reset_control_assert(aio->chip->rst); + clk_disable_unprepare(aio->chip->clk); + } return 0; } @@ -439,13 +442,15 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) if (!aio->chip->active) return 0; - ret = clk_prepare_enable(aio->chip->clk); - if (ret) - return ret; + if (!aio->chip->num_wup_aios) { + ret = clk_prepare_enable(aio->chip->clk); + if (ret) + return ret; - ret = reset_control_deassert(aio->chip->rst); - if (ret) - goto err_out_clock; + ret = reset_control_deassert(aio->chip->rst); + if (ret) + goto err_out_clock; + } aio_iecout_set_enable(aio->chip, true); aio_chip_init(aio->chip); @@ -458,7 +463,7 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) ret = aio_init(sub); if (ret) - goto err_out_clock; + goto err_out_reset; if (!sub->setting) continue; @@ -466,11 +471,16 @@ int uniphier_aio_dai_resume(struct snd_soc_dai *dai) aio_port_reset(sub); aio_src_reset(sub); } + aio->chip->num_wup_aios++; return 0; +err_out_reset: + if (!aio->chip->num_wup_aios) + reset_control_assert(aio->chip->rst); err_out_clock: - clk_disable_unprepare(aio->chip->clk); + if (!aio->chip->num_wup_aios) + clk_disable_unprepare(aio->chip->clk); return ret; } @@ -619,6 +629,7 @@ int uniphier_aio_probe(struct platform_device *pdev) return PTR_ERR(chip->rst); chip->num_aios = chip->chip_spec->num_dais; + chip->num_wup_aios = chip->num_aios; chip->aios = devm_kcalloc(dev, chip->num_aios, sizeof(struct uniphier_aio), GFP_KERNEL); diff --git a/sound/soc/uniphier/aio.h b/sound/soc/uniphier/aio.h index ca6ccba..a7ff7e5 100644 --- a/sound/soc/uniphier/aio.h +++ b/sound/soc/uniphier/aio.h @@ -285,6 +285,7 @@ struct uniphier_aio_chip { struct uniphier_aio *aios; int num_aios; + int num_wup_aios; struct uniphier_aio_pll *plls; int num_plls; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2019-08-20 6:16 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-20 6:16 Kunihiko Hayashi [this message] 2019-08-20 6:16 ` [PATCH] ASoC: uniphier: Fix double reset assersion when transitioning to suspend state Kunihiko Hayashi 2019-08-20 6:34 ` Uwe Kleine-König 2019-08-20 6:34 ` Uwe Kleine-König 2019-08-20 12:54 ` Applied "ASoC: uniphier: Fix double reset assersion when transitioning to suspend state" to the asoc tree Mark Brown 2019-08-20 12:54 ` Mark Brown 2019-08-20 12:54 ` Mark Brown
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