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Miller" , Jakub Kicinski , Stanimir Varbanov Cc: linux-arm-msm@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v1 05/15] pwrseq: implement onecell helper Date: Wed, 6 Oct 2021 06:53:57 +0300 Message-Id: <20211006035407.1147909-6-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211006035407.1147909-1-dmitry.baryshkov@linaro.org> References: <20211006035407.1147909-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Provide of_pwrseq_xlate_onecell() - a helper easing implementation of power sequencers using one cell to determine pwrseq instance to return. Signed-off-by: Dmitry Baryshkov --- drivers/power/pwrseq/core.c | 26 ++++++++++++++++++++++++++ include/linux/pwrseq/driver.h | 12 ++++++++++++ 2 files changed, 38 insertions(+) -- 2.33.0 diff --git a/drivers/power/pwrseq/core.c b/drivers/power/pwrseq/core.c index 0aaba4e79a44..3dffa52f65ee 100644 --- a/drivers/power/pwrseq/core.c +++ b/drivers/power/pwrseq/core.c @@ -449,6 +449,32 @@ struct pwrseq_provider *__devm_of_pwrseq_provider_register(struct device *dev, } EXPORT_SYMBOL_GPL(__devm_of_pwrseq_provider_register); +/** + * of_pwrseq_xlate_single() - returns the pwrseq instance from pwrseq provider using single index + * @data: the pwrseq provider data, struct pwrseq_onecell_data + * @args: of_phandle_args containing single integer index + * + * Intended to be used by pwrseq provider for the common case where + * #pwrseq-cells is 1. It will return corresponding pwrseq instance. + */ +struct pwrseq *of_pwrseq_xlate_onecell(void *data, struct of_phandle_args *args) +{ + struct pwrseq_onecell_data *pwrseq_data = data; + unsigned int idx; + + if (args->args_count != 1) + return ERR_PTR(-EINVAL); + + idx = args->args[0]; + if (idx >= pwrseq_data->num) { + pr_err("%s: invalid index %u\n", __func__, idx); + return ERR_PTR(-EINVAL); + } + + return pwrseq_data->pwrseqs[idx]; +} +EXPORT_SYMBOL_GPL(of_pwrseq_xlate_onecell); + static int __init pwrseq_core_init(void) { return class_register(&pwrseq_class); diff --git a/include/linux/pwrseq/driver.h b/include/linux/pwrseq/driver.h index 0ca1d0311ab6..8d46940981bf 100644 --- a/include/linux/pwrseq/driver.h +++ b/include/linux/pwrseq/driver.h @@ -157,4 +157,16 @@ static inline struct pwrseq *of_pwrseq_xlate_single(void *data, return data; } +/** + * struct pwrseq_onecell_data - pwrseq data for of_pwrseq_xlate_onecell + * @num: amount of instances in @owrseqs + * @pwrseqs: array of pwrseq instances + */ +struct pwrseq_onecell_data { + unsigned int num; + struct pwrseq *pwrseqs[]; +}; + +struct pwrseq *of_pwrseq_xlate_onecell(void *data, struct of_phandle_args *args); + #endif /* __LINUX_PWRSEQ_DRIVER_H__ */