From: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Juergen Borleis <jbe@xxxxxxxxxxxxxx>
---
drivers/mfd/Kconfig | 4 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/da9063.c | 160 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 165 insertions(+)
create mode 100644 drivers/mfd/da9063.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index bf012bf..1be9f61 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -20,6 +20,10 @@ config MFD_DA9053_RESET_FEATURE
help
This PMIC unit can be used to reset/restart the system.
+config MFD_DA9063
+ depends on I2C
+ bool "DA9063 PMIC driver"
+
config MFD_LP3972
depends on I2C
bool "LP3972 driver"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 2899dde..041915a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_MFD_ACT8846) += act8846.o
obj-$(CONFIG_MFD_DA9053) += da9053.o
+obj-$(CONFIG_MFD_DA9063) += da9063.o
obj-$(CONFIG_MFD_LP3972) += lp3972.o
obj-$(CONFIG_MFD_MC13XXX) += mc13xxx.o
obj-$(CONFIG_MFD_MC34704) += mc34704.o
diff --git a/drivers/mfd/da9063.c b/drivers/mfd/da9063.c
new file mode 100644
index 0000000..65b1fad
--- /dev/null
+++ b/drivers/mfd/da9063.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2015 Pengutronix, Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
+ *
+ * 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 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 <common.h>
+#include <driver.h>
+#include <init.h>
+#include <i2c/i2c.h>
+#include <malloc.h>
+#include <notifier.h>
+#include <reset_source.h>
+#include <watchdog.h>
+
+struct da9063 {
+ struct watchdog wd;
+ struct i2c_client *client;
+ struct notifier_block notify;
+};
+
+/* System Control and Event Registers */
+#define DA9063_REG_FAULT_LOG 0x05
+#define DA9063_REG_CONTROL_D 0x11
+#define DA9063_REG_CONTROL_F 0x13
+
+/* DA9063_REG_FAULT_LOG (addr=0x05) */
+#define DA9063_TWD_ERROR 0x01
+#define DA9063_POR 0x02
+#define DA9063_NSHUTDOWN 0x40
+
+/* DA9063_REG_CONTROL_D (addr=0x11) */
+#define DA9063_TWDSCALE_MASK 0x07
+
+/* DA9063_REG_CONTROL_F (addr=0x13) */
+#define DA9063_SHUTDOWN 0x02
+
+static int da9063_watchdog_set_timeout(struct watchdog *wd, unsigned timeout)
+{
+ struct da9063 *priv = container_of(wd, struct da9063, wd);
+ struct device_d *dev = &priv->client->dev;
+ unsigned int scale = 0;
+ int ret;
+ u8 val;
+
+ if (timeout > 131)
+ return -EINVAL;
+
+ if (timeout) {
+ timeout *= 1000; /* convert to ms */
+ scale = 0;
+ while (timeout > (2048 << scale) && scale <= 6)
+ scale++;
+ dev_dbg(dev, "calculated TWDSCALE=%u (req=%ims calc=%ims)\n",
+ scale, timeout, 2048 << scale);
+ scale++; /* scale 0 disables the WD */
+ }
+
+ ret = i2c_read_reg(priv->client, DA9063_REG_CONTROL_D, &val, 1);
+ if (ret < 0)
+ return ret;
+
+ val &= ~DA9063_TWDSCALE_MASK;
+ val |= scale;
+
+ return i2c_write_reg(priv->client, DA9063_REG_CONTROL_D, &val, 1);
+}
+
+static void da9063_detect_reset_source(struct da9063 *priv)
+{
+ int ret;
+ u8 val;
+
+ ret = i2c_read_reg(priv->client, DA9063_REG_FAULT_LOG, &val, 1);
+ if (ret < 0)
+ return;
+
+ /* Write one to clear */
+ i2c_write_reg(priv->client, DA9063_REG_FAULT_LOG, &val, 1);
+
+ if (val & DA9063_TWD_ERROR) {
+ reset_source_set(RESET_WDG);
+ return;
+ }
+
+ if (val & DA9063_POR) {
+ reset_source_set(RESET_POR);
+ return;
+ }
+
+ if (val & DA9063_NSHUTDOWN) {
+ reset_source_set(RESET_RST);
+ return;
+ }
+
+ /* else keep the default 'unknown' state */
+}
+
+static int da9063_restart(struct notifier_block *nb, unsigned long event, void *data)
+{
+ struct da9063 *priv = container_of(nb, struct da9063, notify);
+ u8 val = DA9063_SHUTDOWN;
+
+ return i2c_write_reg(priv->client, DA9063_REG_CONTROL_F, &val, 1);
+}
+
+static int da9063_probe(struct device_d *dev)
+{
+ struct da9063 *priv = NULL;
+ int ret;
+
+ priv = xzalloc(sizeof(struct da9063));
+ priv->wd.set_timeout = da9063_watchdog_set_timeout;
+ priv->client = to_i2c_client(dev);
+ priv->notify.notifier_call = da9063_restart;
+
+ ret = watchdog_register(&priv->wd);
+ if (ret)
+ goto on_error;
+
+ da9063_detect_reset_source(priv);
+
+ register_restart_handler(&priv->notify);
+
+ dev->priv = priv;
+
+ return 0;
+
+on_error:
+ if (priv)
+ free(priv);
+ return ret;
+}
+
+static struct platform_device_id da9063_id[] = {
+ { "da9063", },
+ { }
+};
+
+static struct driver_d da9063_driver = {
+ .name = "da9063",
+ .probe = da9063_probe,
+ .id_table = da9063_id,
+};
+
+static int da9063_init(void)
+{
+ return i2c_driver_register(&da9063_driver);
+}
+
+device_initcall(da9063_init);
--
2.1.4
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