sandbox: add: sandbox PMIC device drivers: I2C emul, pmic, regulator
This commit adds emulation of sandbox PMIC device, which includes:
- PMIC I2C emulation driver
- PMIC I/O driver (UCLASS_PMIC)
- PMIC regulator driver (UCLASS_REGULATOR)
The sandbox PMIC has 12 significant registers and 4 as padding to 16 bytes,
which allows using 'i2c md' command with the default count (16).
The sandbox PMIC provides regulators:
- 2x BUCK
- 2x LDO
Each, with adjustable output:
- Enable state
- Voltage
- Current limit (LDO1/BUCK1 only)
- Operation mode (different for BUCK and LDO)
Each attribute has it's own register, beside the enable state, which depends
on operation mode.
The header file: sandbox_pmic.h includes PMIC's default register values,
which are set on i2c pmic emul driver's probe() method.
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested on sandbox:
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/power/pmic/sandbox.c b/drivers/power/pmic/sandbox.c
new file mode 100644
index 0000000..3e56acd
--- /dev/null
+++ b/drivers/power/pmic/sandbox.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 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/sandbox_pmic.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+ { .prefix = SANDBOX_OF_LDO_PREFIX, .driver = SANDBOX_LDO_DRIVER },
+ { .prefix = SANDBOX_OF_BUCK_PREFIX, .driver = SANDBOX_BUCK_DRIVER },
+ { },
+};
+
+static int sandbox_pmic_reg_count(struct udevice *dev)
+{
+ return SANDBOX_PMIC_REG_COUNT;
+}
+
+static int sandbox_pmic_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 sandbox_pmic_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 sandbox_pmic_bind(struct udevice *dev)
+{
+ if (!pmic_bind_children(dev, dev->of_offset, pmic_children_info))
+ error("%s:%d PMIC: %s - no child found!", __func__, __LINE__,
+ dev->name);
+
+ /* Always return success for this device - allows for PMIC I/O */
+ return 0;
+}
+
+static struct dm_pmic_ops sandbox_pmic_ops = {
+ .reg_count = sandbox_pmic_reg_count,
+ .read = sandbox_pmic_read,
+ .write = sandbox_pmic_write,
+};
+
+static const struct udevice_id sandbox_pmic_ids[] = {
+ { .compatible = "sandbox,pmic" },
+ { }
+};
+
+U_BOOT_DRIVER(sandbox_pmic) = {
+ .name = "sandbox_pmic",
+ .id = UCLASS_PMIC,
+ .of_match = sandbox_pmic_ids,
+ .bind = sandbox_pmic_bind,
+ .ops = &sandbox_pmic_ops,
+};