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[78.94.0.51]) by smtp.gmail.com with ESMTPSA id f13-20020a170906824d00b00726e108b566sm12871779ejx.173.2022.07.07.01.19.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jul 2022 01:19:07 -0700 (PDT) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: linux-kernel@vger.kernel.org, Liam Girdwood , Mark Brown Cc: Laxman Dewangan , Naresh Solanki Subject: [PATCH v4 3/4] regulator: output-supply: Add devicetree support Date: Thu, 7 Jul 2022 10:18:25 +0200 Message-Id: <20220707081826.953449-4-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220707081826.953449-1-Naresh.Solanki@9elements.com> References: <20220707081826.953449-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Laxman Dewangan Add DT support of the regulator driver output-supply. The supply names for this driver is provided through DT properties so that proper regulator(s) handle can be acquired. Board DT can configure the output-supply driver to * set regulator name * turn on at boot time * specific regulator handles that needs to be controlled by the driver. Post boot facilitate control of regulator(s) from sysfs. Signed-off-by: Laxman Dewangan Signed-off-by: Naresh Solanki --- drivers/regulator/userspace-consumer.c | 47 ++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/regulator/userspace-consumer.c b/drivers/regulator/userspace-consumer.c index 8ca28664776e..b424a0ddf582 100644 --- a/drivers/regulator/userspace-consumer.c +++ b/drivers/regulator/userspace-consumer.c @@ -18,6 +18,7 @@ #include #include #include +#include struct userspace_consumer_data { const char *name; @@ -100,6 +101,40 @@ static const struct attribute_group attr_group = { .attrs = attributes, }; +static struct regulator_userspace_consumer_data *get_pdata_from_dt_node( + struct platform_device *pdev) +{ + struct regulator_userspace_consumer_data *pdata; + struct device_node *np = pdev->dev.of_node; + struct property *prop; + const char *supply; + int num_supplies; + int count = 0; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + pdata->name = of_get_property(np, "regulator-name", NULL); + pdata->init_on = of_property_read_bool(np, "regulator-boot-on"); + num_supplies = of_property_count_strings(np, "regulator-supplies"); + if (num_supplies < 0) { + dev_err(&pdev->dev, + "could not parse property regulator-supplies\n"); + return ERR_PTR(-EINVAL); + } + pdata->num_supplies = num_supplies; + pdata->supplies = devm_kzalloc(&pdev->dev, num_supplies * + sizeof(*pdata->supplies), GFP_KERNEL); + if (!pdata->supplies) + return ERR_PTR(-ENOMEM); + + of_property_for_each_string(np, "regulator-supplies", prop, supply) + pdata->supplies[count++].supply = supply; + + return pdata; +} + static int regulator_userspace_consumer_probe(struct platform_device *pdev) { struct regulator_userspace_consumer_data *pdata; @@ -107,6 +142,11 @@ static int regulator_userspace_consumer_probe(struct platform_device *pdev) int ret; pdata = dev_get_platdata(&pdev->dev); + if (!pdata && pdev->dev.of_node) { + pdata = get_pdata_from_dt_node(pdev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } if (!pdata) return -EINVAL; @@ -166,11 +206,18 @@ static int regulator_userspace_consumer_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id regulator_userspace_consumer_of_match[] = { + { .compatible = "9elements,output-supply", }, + {}, +}; +MODULE_DEVICE_TABLE(of, regulator_userspace_consumer_of_match); + static struct platform_driver regulator_userspace_consumer_driver = { .probe = regulator_userspace_consumer_probe, .remove = regulator_userspace_consumer_remove, .driver = { .name = "reg-userspace-consumer", + .of_match_table = regulator_userspace_consumer_of_match, }, }; -- 2.35.3