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authorSimon Glass <sjg@chromium.org>2015-07-02 18:15:58 -0600
committerSimon Glass <sjg@chromium.org>2015-08-05 21:06:12 -0600
commit151b223b9c4e309d65166558afdfa0ce3c3b3213 (patch)
tree624862264958849dea9b13287d14b29e9ee130d9 /drivers/power/pmic/tps65090.c
parent7fb57396e632126867c360e0dc0700db3d059aef (diff)
dm: power: Add a new driver for the TPS65090 PMIC
The existing TPS65090 driver does not support driver model. Add a new one that does. This can be used as a base for a regulator driver also. It uses the standard device tree binding. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Diffstat (limited to 'drivers/power/pmic/tps65090.c')
-rw-r--r--drivers/power/pmic/tps65090.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/power/pmic/tps65090.c b/drivers/power/pmic/tps65090.c
new file mode 100644
index 0000000000..4797f327fa
--- /dev/null
+++ b/drivers/power/pmic/tps65090.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/tps65090.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+ { .prefix = "fet", .driver = TPS65090_FET_DRIVER },
+ { },
+};
+
+static int tps65090_reg_count(struct udevice *dev)
+{
+ return TPS65090_NUM_REGS;
+}
+
+static int tps65090_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 tps65090_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+ int ret;
+
+ ret = dm_i2c_read(dev, reg, buff, len);
+ if (ret) {
+ error("read error %d from device: %p register: %#x!", ret, dev,
+ reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int tps65090_bind(struct udevice *dev)
+{
+ int regulators_node;
+ const void *blob = gd->fdt_blob;
+ int children;
+
+ regulators_node = fdt_subnode_offset(blob, dev->of_offset,
+ "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);
+
+ children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+ if (!children)
+ debug("%s: %s - no child found\n", __func__, dev->name);
+
+ /* Always return success for this device */
+ return 0;
+}
+
+static struct dm_pmic_ops tps65090_ops = {
+ .reg_count = tps65090_reg_count,
+ .read = tps65090_read,
+ .write = tps65090_write,
+};
+
+static const struct udevice_id tps65090_ids[] = {
+ { .compatible = "ti,tps65090" },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_tps65090) = {
+ .name = "tps65090 pmic",
+ .id = UCLASS_PMIC,
+ .of_match = tps65090_ids,
+ .bind = tps65090_bind,
+ .ops = &tps65090_ops,
+};