From: Sameer Pujar <spujar@nvidia.com>
To: Sowjanya Komatineni <skomatineni@nvidia.com>,
<thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
<broonie@kernel.org>, <lgirdwood@gmail.com>, <perex@perex.cz>,
<tiwai@suse.com>, <digetx@gmail.com>, <mperttunen@nvidia.com>,
<gregkh@linuxfoundation.org>, <sboyd@kernel.org>,
<robh+dt@kernel.org>, <mark.rutland@arm.com>
Cc: <pdeschrijver@nvidia.com>, <pgaikwad@nvidia.com>,
<josephl@nvidia.com>, <daniel.lezcano@linaro.org>,
<mmaddireddy@nvidia.com>, <markz@nvidia.com>,
<devicetree@vger.kernel.org>, <linux-clk@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v7 15/21] ASoC: tegra: Add fallback implementation for audio mclk
Date: Wed, 8 Jan 2020 11:58:56 +0530 [thread overview]
Message-ID: <a3c5293b-9ed4-3266-f792-38b980e54b1e@nvidia.com> (raw)
In-Reply-To: <d7ac6135-73b0-1087-dafa-4df558a06ef4@nvidia.com>
On 1/8/2020 11:18 AM, Sowjanya Komatineni wrote:
>
> On 1/7/20 9:34 PM, Sameer Pujar wrote:
>>
>> On 1/8/2020 9:55 AM, Sowjanya Komatineni wrote:
>>> mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks
>>> are moved to Tegra PMC driver with pmc as clock provider and using pmc
>>> clock ids.
>>>
>>> New device tree uses clk_out_1 from pmc clock provider.
>>>
>>> So, this patch adds implementation for mclk fallback to extern1 when
>>> retrieving mclk returns -ENOENT to be backward compatible of new device
>>> tree with older kernels.
>>>
>>> Tested-by: Dmitry Osipenko <digetx@gmail.com>
>>> Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
>>> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
>>> ---
>>> sound/soc/tegra/tegra_asoc_utils.c | 11 ++++++++++-
>>> 1 file changed, 10 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/sound/soc/tegra/tegra_asoc_utils.c
>>> b/sound/soc/tegra/tegra_asoc_utils.c
>>> index 9cfebef74870..9a5f81039491 100644
>>> --- a/sound/soc/tegra/tegra_asoc_utils.c
>>> +++ b/sound/soc/tegra/tegra_asoc_utils.c
>>> @@ -183,7 +183,16 @@ int tegra_asoc_utils_init(struct
>>> tegra_asoc_utils_data *data,
>>> data->clk_cdev1 = devm_clk_get(dev, "mclk");
>>> if (IS_ERR(data->clk_cdev1)) {
>>> dev_err(data->dev, "Can't retrieve clk cdev1\n");
>>
>> This error print can be moved inside below if, when this actually
>> meant to be an error condition.
>>
> Want to show error even if mclk retrieval returns ENOENT to clearly
> indicate mclk does not exist along with message of falling back to
> extern1.
Yes, but falling back essentially means 'mclk' is not available and
fallback print is not an error.
Not a major issue though, you can consider updating. Otherwise LGTM.
>>> - return PTR_ERR(data->clk_cdev1);
>>> + if (PTR_ERR(data->clk_cdev1) != -ENOENT)
>>> + return PTR_ERR(data->clk_cdev1);
>>> + /* Fall back to extern1 */
>>> + data->clk_cdev1 = devm_clk_get(dev, "extern1");
>>> + if (IS_ERR(data->clk_cdev1)) {
>>> + dev_err(data->dev, "Can't retrieve clk extern1\n");
>>> + return PTR_ERR(data->clk_cdev1);
>>> + }
>>> +
>>> + dev_err(data->dev, "Falling back to extern1\n");
>>
>> This can be a info print?
>
>>> }
>>> /*
next prev parent reply other threads:[~2020-01-08 6:29 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 4:24 [PATCH v7 00/21] Move PMC clocks into Tegra PMC driver Sowjanya Komatineni
2020-01-08 4:24 ` [PATCH v7 01/21] dt-bindings: clock: tegra: Change CLK_M_DIV to OSC_DIV clocks Sowjanya Komatineni
2020-01-08 4:24 ` [PATCH v7 02/21] clk: tegra: Change CLK_M_DIV clocks " Sowjanya Komatineni
2020-01-08 4:24 ` [PATCH v7 03/21] dt-bindings: clock: tegra: Add DT id for OSC clock Sowjanya Komatineni
2020-01-08 19:18 ` Dmitry Osipenko
2020-01-13 22:03 ` Rob Herring
2020-01-08 4:24 ` [PATCH v7 04/21] clk: tegra: Add Tegra OSC to clock lookup Sowjanya Komatineni
2020-01-08 19:18 ` Dmitry Osipenko
2020-01-08 4:24 ` [PATCH v7 05/21] clk: tegra: Fix Tegra PMC clock out parents Sowjanya Komatineni
2020-01-08 8:34 ` Nicolas Chauvet
2020-01-09 17:18 ` Sowjanya Komatineni
2020-01-09 19:45 ` Dmitry Osipenko
2020-01-08 4:25 ` [PATCH v7 06/21] dt-bindings: tegra: Convert Tegra PMC bindings to YAML Sowjanya Komatineni
2020-01-13 22:30 ` Rob Herring
2020-01-08 4:25 ` [PATCH v7 07/21] dt-bindings: soc: tegra-pmc: Add Tegra PMC clock bindings Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 08/21] soc: tegra: Add Tegra PMC clocks registration into PMC driver Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 09/21] dt-bindings: soc: tegra-pmc: Add id for Tegra PMC 32KHz blink clock Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 10/21] soc: tegra: Add support for " Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 11/21] clk: tegra: Remove tegra_pmc_clk_init along with clk ids Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 12/21] dt-bindings: clock: tegra: Remove pmc clock ids from clock dt-bindings Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 13/21] ASoC: tegra: Use device managed resource APIs to get the clock Sowjanya Komatineni
2020-01-08 5:26 ` Sameer Pujar
2020-01-08 4:25 ` [PATCH v7 14/21] ASoC: tegra: Add audio mclk configuration Sowjanya Komatineni
2020-01-08 5:15 ` Sameer Pujar
2020-01-08 4:25 ` [PATCH v7 15/21] ASoC: tegra: Add fallback implementation for audio mclk Sowjanya Komatineni
2020-01-08 5:34 ` Sameer Pujar
2020-01-08 5:48 ` Sowjanya Komatineni
2020-01-08 6:28 ` Sameer Pujar [this message]
[not found] ` <745b8c7b-4fe3-c9ea-284e-b89546e8ad87@nvidia.com>
[not found] ` <705edf9b-d1bc-8090-017e-fa4ad445f9fb@nvidia.com>
2020-01-10 22:05 ` Dmitry Osipenko
2020-01-10 22:13 ` Sowjanya Komatineni
2020-01-10 23:02 ` Dmitry Osipenko
2020-01-10 23:14 ` Sowjanya Komatineni
2020-01-11 15:32 ` Dmitry Osipenko
2020-01-08 4:25 ` [PATCH v7 16/21] clk: tegra: Remove audio related clock enables from init_table Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 17/21] ARM: dts: tegra: Add clock-cells property to pmc Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 18/21] arm64: tegra: Add clock-cells property to Tegra PMC node Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 19/21] ARM: tegra: Update sound node clocks in device tree Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 20/21] arm64: tegra: smaug: Change clk_out_2 provider to pmc Sowjanya Komatineni
2020-01-08 4:25 ` [PATCH v7 21/21] ASoC: nau8825: change Tegra clk_out_2 provider to tegra_pmc Sowjanya Komatineni
2020-01-09 19:44 ` [PATCH v7 00/21] Move PMC clocks into Tegra PMC driver Dmitry Osipenko
2020-01-10 1:39 ` Sowjanya Komatineni
2020-01-10 3:24 ` Sowjanya Komatineni
2020-01-10 3:32 ` Sowjanya Komatineni
2020-01-10 4:36 ` Sowjanya Komatineni
2020-01-10 4:43 ` Sameer Pujar
2020-01-10 4:47 ` Sowjanya Komatineni
2020-01-10 14:54 ` Dmitry Osipenko
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