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Message-ID: <20190723014841.yyttacgagktbkwg2@vireshk-i7>
Date: Tue, 23 Jul 2019 07:18:41 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: k.konieczny@...tner.samsung.com
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Kukjin Kim <kgene@...nel.org>,
Kyungmin Park <kyungmin.park@...sung.com>,
Mark Rutland <mark.rutland@....com>,
MyungJoo Ham <myungjoo.ham@...sung.com>,
Nishanth Menon <nm@...com>, Rob Herring <robh+dt@...nel.org>,
Stephen Boyd <sboyd@...nel.org>,
Viresh Kumar <vireshk@...nel.org>, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH v3 2/5] opp: core: add regulators enable and disable
On 19-07-19, 17:05, k.konieczny@...tner.samsung.com wrote:
> Add enable regulators to dev_pm_opp_set_regulators() and disable
> regulators to dev_pm_opp_put_regulators(). Even if bootloader
> leaves regulators enabled, they should be enabled in kernel in
> order to increase the reference count.
>
> Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>
> ---
> Changes in v3:
> - corrected error path in enable
> - improved commit message
> Changes in v2:
> - move regulator enable and disable into loop
> ---
> drivers/opp/core.c | 16 +++++++++++++---
> 1 file changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 0e7703fe733f..a8a480cdabab 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1570,6 +1570,12 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
> goto free_regulators;
> }
>
> + ret = regulator_enable(reg);
> + if (ret < 0) {
> + regulator_put(reg);
> + goto free_regulators;
> + }
> +
> opp_table->regulators[i] = reg;
> }
>
> @@ -1583,8 +1589,10 @@ struct opp_table *dev_pm_opp_set_regulators(struct device *dev,
> return opp_table;
>
> free_regulators:
> - while (i != 0)
> - regulator_put(opp_table->regulators[--i]);
> + while (i--) {
> + regulator_disable(opp_table->regulators[i]);
> + regulator_put(opp_table->regulators[i]);
> + }
>
> kfree(opp_table->regulators);
> opp_table->regulators = NULL;
> @@ -1610,8 +1618,10 @@ void dev_pm_opp_put_regulators(struct opp_table *opp_table)
> /* Make sure there are no concurrent readers while updating opp_table */
> WARN_ON(!list_empty(&opp_table->opp_list));
>
> - for (i = opp_table->regulator_count - 1; i >= 0; i--)
> + for (i = opp_table->regulator_count - 1; i >= 0; i--) {
> + regulator_disable(opp_table->regulators[i]);
> regulator_put(opp_table->regulators[i]);
> + }
>
> _free_set_opp_data(opp_table);
Applied. Thanks.
--
viresh
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