Merge remote-tracking branch 'rpmsg/for-next'

[deliverable/linux.git] / drivers / remoteproc / qcom_wcnss_iris.c

diff --git a/drivers/remoteproc/qcom_wcnss_iris.c b/drivers/remoteproc/qcom_wcnss_iris.c
new file mode 100644 (file)
index 0000000..f0ca24a
--- /dev/null
+++ b/drivers/remoteproc/qcom_wcnss_iris.c
@@ -0,0 +1,188 @@
+/*
+ * Qualcomm Wireless Connectivity Subsystem Iris driver
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include "qcom_wcnss.h"
+
+struct qcom_iris {
+       struct device *dev;
+
+       struct clk *xo_clk;
+
+       struct regulator_bulk_data *vregs;
+       size_t num_vregs;
+};
+
+struct iris_data {
+       const struct wcnss_vreg_info *vregs;
+       size_t num_vregs;
+
+       bool use_48mhz_xo;
+};
+
+static const struct iris_data wcn3620_data = {
+       .vregs = (struct wcnss_vreg_info[]) {
+               { "vddxo",  1800000, 1800000, 10000 },
+               { "vddrfa", 1300000, 1300000, 100000 },
+               { "vddpa",  3300000, 3300000, 515000 },
+               { "vdddig", 1800000, 1800000, 10000 },
+       },
+       .num_vregs = 4,
+       .use_48mhz_xo = false,
+};
+
+static const struct iris_data wcn3660_data = {
+       .vregs = (struct wcnss_vreg_info[]) {
+               { "vddxo",  1800000, 1800000, 10000 },
+               { "vddrfa", 1300000, 1300000, 100000 },
+               { "vddpa",  2900000, 3000000, 515000 },
+               { "vdddig", 1200000, 1225000, 10000 },
+       },
+       .num_vregs = 4,
+       .use_48mhz_xo = true,
+};
+
+static const struct iris_data wcn3680_data = {
+       .vregs = (struct wcnss_vreg_info[]) {
+               { "vddxo",  1800000, 1800000, 10000 },
+               { "vddrfa", 1300000, 1300000, 100000 },
+               { "vddpa",  3300000, 3300000, 515000 },
+               { "vdddig", 1800000, 1800000, 10000 },
+       },
+       .num_vregs = 4,
+       .use_48mhz_xo = true,
+};
+
+int qcom_iris_enable(struct qcom_iris *iris)
+{
+       int ret;
+
+       ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
+       if (ret)
+               return ret;
+
+       ret = clk_prepare_enable(iris->xo_clk);
+       if (ret) {
+               dev_err(iris->dev, "failed to enable xo clk\n");
+               goto disable_regulators;
+       }
+
+       return 0;
+
+disable_regulators:
+       regulator_bulk_disable(iris->num_vregs, iris->vregs);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_iris_enable);
+
+void qcom_iris_disable(struct qcom_iris *iris)
+{
+       clk_disable_unprepare(iris->xo_clk);
+       regulator_bulk_disable(iris->num_vregs, iris->vregs);
+}
+EXPORT_SYMBOL_GPL(qcom_iris_disable);
+
+static int qcom_iris_probe(struct platform_device *pdev)
+{
+       const struct iris_data *data;
+       struct qcom_wcnss *wcnss;
+       struct qcom_iris *iris;
+       int ret;
+       int i;
+
+       iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
+       if (!iris)
+               return -ENOMEM;
+
+       data = of_device_get_match_data(&pdev->dev);
+       wcnss = dev_get_drvdata(pdev->dev.parent);
+
+       iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
+       if (IS_ERR(iris->xo_clk)) {
+               if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
+                       dev_err(&pdev->dev, "failed to acquire xo clk\n");
+               return PTR_ERR(iris->xo_clk);
+       }
+
+       iris->num_vregs = data->num_vregs;
+       iris->vregs = devm_kcalloc(&pdev->dev,
+                                  iris->num_vregs,
+                                  sizeof(struct regulator_bulk_data),
+                                  GFP_KERNEL);
+       if (!iris->vregs)
+               return -ENOMEM;
+
+       for (i = 0; i < iris->num_vregs; i++)
+               iris->vregs[i].supply = data->vregs[i].name;
+
+       ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
+       if (ret) {
+               dev_err(&pdev->dev, "failed to get regulators\n");
+               return ret;
+       }
+
+       for (i = 0; i < iris->num_vregs; i++) {
+               if (data->vregs[i].max_voltage)
+                       regulator_set_voltage(iris->vregs[i].consumer,
+                                             data->vregs[i].min_voltage,
+                                             data->vregs[i].max_voltage);
+
+               if (data->vregs[i].load_uA)
+                       regulator_set_load(iris->vregs[i].consumer,
+                                          data->vregs[i].load_uA);
+       }
+
+       qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
+
+       return 0;
+}
+
+static int qcom_iris_remove(struct platform_device *pdev)
+{
+       struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
+
+       qcom_wcnss_assign_iris(wcnss, NULL, false);
+
+       return 0;
+}
+
+static const struct of_device_id iris_of_match[] = {
+       { .compatible = "qcom,wcn3620", .data = &wcn3620_data },
+       { .compatible = "qcom,wcn3660", .data = &wcn3660_data },
+       { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
+       {}
+};
+
+static struct platform_driver wcnss_driver = {
+       .probe = qcom_iris_probe,
+       .remove = qcom_iris_remove,
+       .driver = {
+               .name = "qcom-iris",
+               .of_match_table = iris_of_match,
+       },
+};
+
+module_platform_driver(wcnss_driver);
+MODULE_DESCRIPTION("Qualcomm Wireless Subsystem Iris driver");
+MODULE_LICENSE("GPL v2");