Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / hi6421-pmic-core.c

diff --git a/kernel/drivers/mfd/hi6421-pmic-core.c b/kernel/drivers/mfd/hi6421-pmic-core.c
new file mode 100644 (file)
index 0000000..95b2ff8
--- /dev/null
+++ b/kernel/drivers/mfd/hi6421-pmic-core.c
@@ -0,0 +1,113 @@
+/*
+ * Device driver for Hi6421 IC
+ *
+ * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
+ *              http://www.hisilicon.com
+ * Copyright (c) <2013-2014> Linaro Ltd.
+ *              http://www.linaro.org
+ *
+ * Author: Guodong Xu <guodong.xu@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mfd/hi6421-pmic.h>
+
+static const struct mfd_cell hi6421_devs[] = {
+       { .name = "hi6421-regulator", },
+};
+
+static const struct regmap_config hi6421_regmap_config = {
+       .reg_bits = 32,
+       .reg_stride = 4,
+       .val_bits = 8,
+       .max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
+};
+
+static int hi6421_pmic_probe(struct platform_device *pdev)
+{
+       struct hi6421_pmic *pmic;
+       struct resource *res;
+       void __iomem *base;
+       int ret;
+
+       pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
+       if (!pmic)
+               return -ENOMEM;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(base))
+               return PTR_ERR(base);
+
+       pmic->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
+                                                &hi6421_regmap_config);
+       if (IS_ERR(pmic->regmap)) {
+               dev_err(&pdev->dev,
+                       "regmap init failed: %ld\n", PTR_ERR(pmic->regmap));
+               return PTR_ERR(pmic->regmap);
+       }
+
+       /* set over-current protection debounce 8ms */
+       regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
+                               (HI6421_OCP_DEB_SEL_MASK
+                                | HI6421_OCP_EN_DEBOUNCE_MASK
+                                | HI6421_OCP_AUTO_STOP_MASK),
+                               (HI6421_OCP_DEB_SEL_8MS
+                                | HI6421_OCP_EN_DEBOUNCE_ENABLE));
+
+       platform_set_drvdata(pdev, pmic);
+
+       ret = mfd_add_devices(&pdev->dev, 0, hi6421_devs,
+                       ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
+       if (ret) {
+               dev_err(&pdev->dev, "add mfd devices failed: %d\n", ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int hi6421_pmic_remove(struct platform_device *pdev)
+{
+       mfd_remove_devices(&pdev->dev);
+
+       return 0;
+}
+
+static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
+       { .compatible = "hisilicon,hi6421-pmic", },
+       { },
+};
+
+static struct platform_driver hi6421_pmic_driver = {
+       .driver = {
+               .name   = "hi6421_pmic",
+               .of_match_table = of_hi6421_pmic_match_tbl,
+       },
+       .probe  = hi6421_pmic_probe,
+       .remove = hi6421_pmic_remove,
+};
+module_platform_driver(hi6421_pmic_driver);
+
+MODULE_AUTHOR("Guodong Xu <guodong.xu@linaro.org>");
+MODULE_DESCRIPTION("Hi6421 PMIC driver");
+MODULE_LICENSE("GPL v2");