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authorPrzemyslaw Marczak <p.marczak@samsung.com>2015-04-20 20:07:46 +0200
committerSimon Glass <sjg@chromium.org>2015-05-14 18:49:38 -0600
commit52a3de5e123b3c36706b3904464a409b70e2d481 (patch)
treefe4daecccf8a33a6f5525a569c50a984543b7c29 /drivers
parentf37df0f877347808db1102f95839c47b92c9b3e0 (diff)
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dm: pmic: add max77686 pmic driver
This is the implementation of driver model PMIC driver. The max77686 PMIC driver implements read/write operations and driver bind method - to bind its childs. This driver will try to bind the regulator devices by using it's child info array with regulator prefixes and driver names. This should succeed when compatible regulator driver is compiled. If no regulator driver found, then the pmic can still provide read/write operations, and can be used with PMIC function calls. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/power/pmic/Kconfig7
-rw-r--r--drivers/power/pmic/Makefile1
-rw-r--r--drivers/power/pmic/max77686.c87
-rw-r--r--drivers/power/pmic/pmic_max77686.c2
4 files changed, 96 insertions, 1 deletions
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index d06d632e89..af68783987 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -9,3 +9,10 @@ config DM_PMIC
for read/write. For detailed description, please refer to the files:
- 'drivers/power/pmic/pmic-uclass.c'
- 'include/power/pmic.h'
+
+config DM_PMIC_MAX77686
+ bool "Enable Driver Model for PMIC MAX77686"
+ depends on DM_PMIC
+ ---help---
+ This config enables implementation of driver-model pmic uclass features
+ for PMIC MAX77686. The driver implements read/write operations. \ No newline at end of file
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 594f620218..8cb993d0a7 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o
obj-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o
obj-$(CONFIG_POWER_MAX77686) += pmic_max77686.o
+obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o
obj-$(CONFIG_POWER_TPS65090_I2C) += pmic_tps65090.o
obj-$(CONFIG_POWER_TPS65090_EC) += pmic_tps65090_ec.o
diff --git a/drivers/power/pmic/max77686.c b/drivers/power/pmic/max77686.c
new file mode 100644
index 0000000000..e9503e24a4
--- /dev/null
+++ b/drivers/power/pmic/max77686.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2014-2015 Samsung Electronics
+ * Przemyslaw Marczak <p.marczak@samsung.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/max77686_pmic.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_childs_info[] = {
+ { .prefix = "ldo", .driver = MAX77686_LDO_DRIVER },
+ { .prefix = "buck", .driver = MAX77686_BUCK_DRIVER },
+ { },
+};
+
+static int max77686_write(struct udevice *dev, uint reg, const uint8_t *buff,
+ int len)
+{
+ if (dm_i2c_write(dev, reg, buff, len)) {
+ error("write error to device: %p register: %#x!", dev, reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int max77686_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+ if (dm_i2c_read(dev, reg, buff, len)) {
+ error("read error from device: %p register: %#x!", dev, reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int max77686_bind(struct udevice *dev)
+{
+ int regulators_node;
+ const void *blob = gd->fdt_blob;
+ int childs;
+
+ regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+ "voltage-regulators");
+ if (regulators_node <= 0) {
+ debug("%s: %s regulators subnode not found!", __func__,
+ dev->name);
+ return -ENXIO;
+ }
+
+ debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
+
+ childs = pmic_bind_childs(dev, regulators_node, pmic_childs_info);
+ if (!childs)
+ debug("%s: %s - no child found\n", __func__, dev->name);
+
+ /* Always return success for this device */
+ return 0;
+}
+
+static struct dm_pmic_ops max77686_ops = {
+ .reg_count = MAX77686_NUM_OF_REGS,
+ .read = max77686_read,
+ .write = max77686_write,
+};
+
+static const struct udevice_id max77686_ids[] = {
+ { .compatible = "maxim,max77686" },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_max77686) = {
+ .name = "max77686 pmic",
+ .id = UCLASS_PMIC,
+ .of_match = max77686_ids,
+ .bind = max77686_bind,
+ .ops = &max77686_ops,
+};
diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c
index 95b1a57ca2..1ad810acc2 100644
--- a/drivers/power/pmic/pmic_max77686.c
+++ b/drivers/power/pmic/pmic_max77686.c
@@ -295,7 +295,7 @@ int pmic_init(unsigned char bus)
p->name = name;
p->interface = PMIC_I2C;
- p->number_of_regs = PMIC_NUM_OF_REGS;
+ p->number_of_regs = MAX77686_NUM_OF_REGS;
p->hw.i2c.tx_num = 1;
puts("Board PMIC init\n");