From: Matti Vaittinen <mazziesaccount@gmail.com>
To: Jonathan Cameron <jic23@kernel.org>
Cc: "Matti Vaittinen" <matti.vaittinen@fi.rohmeurope.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Lars-Peter Clausen" <lars@metafoo.de>,
linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 07/14] iio: ltc2688: Simplify using devm_regulator_*get_enable()
Date: Sat, 20 Aug 2022 16:38:17 +0300 [thread overview]
Message-ID: <412c5d22-d59b-9191-80dd-e3ca11360bc4@gmail.com> (raw)
In-Reply-To: <20220820122120.57dddcab@jic23-huawei>
On 8/20/22 14:21, Jonathan Cameron wrote:
> On Fri, 19 Aug 2022 22:19:17 +0300
> Matti Vaittinen <mazziesaccount@gmail.com> wrote:
>
>> Use devm_regulator_bulk_get_enable() instead of open coded bulk-get,
>> bulk-enable, add-action-to-disable-at-detach - pattern.
>>
>> Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
>>
>> ---
>> v2 => v3
>> Split to own patch.
>> ---
>> drivers/iio/dac/ltc2688.c | 23 +++--------------------
>> 1 file changed, 3 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/iio/dac/ltc2688.c b/drivers/iio/dac/ltc2688.c
>> index 28bdde2d3088..fcad3efe62ea 100644
>> --- a/drivers/iio/dac/ltc2688.c
>> +++ b/drivers/iio/dac/ltc2688.c
>> @@ -84,7 +84,6 @@ struct ltc2688_chan {
>> struct ltc2688_state {
>> struct spi_device *spi;
>> struct regmap *regmap;
>> - struct regulator_bulk_data regulators[2];
>> struct ltc2688_chan channels[LTC2688_DAC_CHANNELS];
>> struct iio_chan_spec *iio_chan;
>> /* lock to protect against multiple access to the device and shared data */
>> @@ -902,13 +901,6 @@ static int ltc2688_setup(struct ltc2688_state *st, struct regulator *vref)
>> LTC2688_CONFIG_EXT_REF);
>> }
>>
>> -static void ltc2688_disable_regulators(void *data)
>> -{
>> - struct ltc2688_state *st = data;
>> -
>> - regulator_bulk_disable(ARRAY_SIZE(st->regulators), st->regulators);
>> -}
>> -
>> static void ltc2688_disable_regulator(void *regulator)
>> {
>> regulator_disable(regulator);
>> @@ -970,6 +962,7 @@ static int ltc2688_probe(struct spi_device *spi)
>> struct regulator *vref_reg;
>> struct device *dev = &spi->dev;
>> int ret;
>> + static const char * const regulators[] = {"vcc", "iovcc"};
> trivial - slight preference for
> { "vcc", "iovcc" };
>
> This isn't as important as for numeric values as we get some readability
> from the quotes but still nice to have.
Right. I'll fix it.
> For the whole static / vs non static. My personal preference is not
> to have the static marking but I don't care that much.
>
I'd like to stick with the static here. I know this one particular array
does not have much of a footprint - but I'd like to encourage the habit
of considering the memory usage. This discussion serves as an example of
how unknown the impact of making const data static is. I didn't know
this myself until Sebastian educated me :) Hence my strong preference
on keeping this 'static' as an example for others who are as ignorant as
I were ;) After all, having const data arrays static is quite an easy
way of improving things - and it really does matter when there is many
of arrays - or when they contain large data.
Yours
-- Matti
--
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland
~~ When things go utterly wrong vim users can always type :help! ~~
next prev parent reply other threads:[~2022-08-20 13:38 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-19 19:16 [PATCH v3 00/14] Use devm helpers for regulator get and enable Matti Vaittinen
2022-08-19 19:17 ` [PATCH v3 01/14] docs: devres: regulator: Add new get_enable functions to devres.rst Matti Vaittinen
2022-08-19 19:17 ` [PATCH v3 02/14] clk: cdce925: simplify using devm_regulator_get_enable() Matti Vaittinen
2022-10-17 23:07 ` Stephen Boyd
2022-08-19 19:18 ` [PATCH v3 03/14] gpu: drm: simplify drivers using devm_regulator_*get_enable*() Matti Vaittinen
2022-08-29 14:25 ` Robert Foss
2022-08-30 7:04 ` Matti Vaittinen
2022-08-19 19:18 ` [PATCH v3 04/14] hwmon: lm90: simplify using devm_regulator_get_enable() Matti Vaittinen
2022-08-19 19:18 ` [PATCH v3 05/14] hwmon: adm1177: " Matti Vaittinen
2022-08-19 19:36 ` Guenter Roeck
2022-08-19 19:19 ` [PATCH v3 06/14] iio: ad7192: Simplify " Matti Vaittinen
2022-10-16 15:59 ` Jonathan Cameron
2022-08-19 19:19 ` [PATCH v3 07/14] iio: ltc2688: Simplify using devm_regulator_*get_enable() Matti Vaittinen
2022-08-20 11:21 ` Jonathan Cameron
2022-08-20 13:38 ` Matti Vaittinen [this message]
2022-08-20 16:09 ` Andy Shevchenko
2022-08-20 17:30 ` Matti Vaittinen
2022-08-20 17:41 ` Andy Shevchenko
2022-08-20 19:00 ` Matti Vaittinen
2022-08-21 13:13 ` Andy Shevchenko
2022-08-22 8:13 ` Vaittinen, Matti
2022-08-22 19:14 ` Jonathan Cameron
2022-08-30 11:34 ` Sa, Nuno
2022-10-16 16:04 ` Jonathan Cameron
2022-08-19 19:19 ` [PATCH v3 08/14] iio: bmg160_core: " Matti Vaittinen
2022-08-19 23:30 ` Andy Shevchenko
2022-08-20 6:19 ` Vaittinen, Matti
2022-08-20 6:25 ` Andy Shevchenko
2022-08-20 6:48 ` Vaittinen, Matti
2022-08-20 7:18 ` Andy Shevchenko
2022-08-20 10:05 ` Matti Vaittinen
2022-08-20 16:21 ` Andy Shevchenko
2022-08-20 17:27 ` Matti Vaittinen
2022-08-21 13:08 ` Andy Shevchenko
2022-08-22 5:50 ` Vaittinen, Matti
2022-08-20 11:38 ` Jonathan Cameron
2022-08-20 13:20 ` Matti Vaittinen
2022-08-20 11:22 ` Jonathan Cameron
2022-08-20 13:26 ` Matti Vaittinen
2022-10-16 16:08 ` Jonathan Cameron
2022-10-17 4:28 ` Matti Vaittinen
2022-08-19 19:19 ` [PATCH v3 09/14] iio: st_lsm6dsx: " Matti Vaittinen
2022-10-16 16:11 ` Jonathan Cameron
2022-08-19 19:20 ` [PATCH v3 10/14] iio: ad7476: simplify using devm_regulator_get_enable() Matti Vaittinen
2022-08-30 11:44 ` Sa, Nuno
2022-10-16 16:12 ` Jonathan Cameron
2022-08-19 19:20 ` [PATCH v3 11/14] iio: ad7606: " Matti Vaittinen
2022-08-30 11:46 ` Sa, Nuno
2022-08-30 12:54 ` Matti Vaittinen
2022-10-16 16:15 ` Jonathan Cameron
2022-10-16 16:24 ` Jonathan Cameron
2022-10-17 4:32 ` Matti Vaittinen
2022-08-19 19:20 ` [PATCH v3 12/14] iio: max1241: " Matti Vaittinen
2022-08-19 19:58 ` Alexandru Lazar
2022-10-16 16:17 ` Jonathan Cameron
2022-08-19 19:20 ` [PATCH v3 13/14] iio: max1363: " Matti Vaittinen
2022-08-30 11:50 ` Sa, Nuno
2022-10-16 16:18 ` Jonathan Cameron
2022-10-16 16:37 ` Jonathan Cameron
2022-08-19 19:21 ` [PATCH v3 14/14] iio: hmc425a: " Matti Vaittinen
2022-08-30 11:49 ` Sa, Nuno
2022-08-30 13:00 ` Matti Vaittinen
2022-08-30 13:55 ` Sa, Nuno
2022-10-16 16:20 ` Jonathan Cameron
2022-08-19 23:27 ` [PATCH v3 00/14] Use devm helpers for regulator get and enable Andy Shevchenko
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