pmic: Add Renesas RAA215300 PMIC driver

The RZ/G2L SMARC module is powered via a Renesas RAA215300 PMIC which
provides several voltage converters, a real time clock (RTC) and reset
control. A basic driver is implemented for this device so that we can
read, write and dump the PMIC registers.

The raa215300_bind() function is added as a stub, binding of the
sysreset driver will be added in a later patch.

Additional features of this PMIC (such as reset control) may be
supported by future patches.

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 454a6e0cf87ad9f9d88ee1766c37e6a71cd07f37..9b61b18e11fda2854cabc789d45fb93c3403f15b 100644 (file)
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -404,6 +404,15 @@ config PMIC_TPS65219
        help
        The TPS65219 is a PMIC containing a bunch of SMPS & LDOs.
        This driver binds the pmic children.
+
+config PMIC_RAA215300
+       bool "Renesas RAA215300 PMIC driver"
+       depends on DM_PMIC
+       help
+         The Renesas RAA215300 PMIC driver includes RTC support, system reset
+         support and several voltage regulators. For now, this driver simply
+         allows register access and will bind the sysreset driver
+         (CONFIG_SYSRESET_RAA215300) if it is enabled.
 endif
 
 config PMIC_TPS65217

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 55ee614364be082136892d6f22216dd11af45ba2..a2d59deeed8bfc6006ade2d02ff24ca2d0243f91 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_PMIC_STPMIC1) += stpmic1.o
 obj-$(CONFIG_PMIC_TPS65217) += pmic_tps65217.o
 obj-$(CONFIG_PMIC_TPS65219) += tps65219.o
 obj-$(CONFIG_PMIC_TPS65941) += tps65941.o
+obj-$(CONFIG_PMIC_RAA215300) += raa215300.o
 obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
 
 ifeq ($(CONFIG_$(SPL_)POWER_LEGACY),y)

diff --git a/drivers/power/pmic/raa215300.c b/drivers/power/pmic/raa215300.c
new file mode 100644 (file)
index 0000000..b93a0d3
--- /dev/null
+++ b/drivers/power/pmic/raa215300.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <i2c.h>
+#include <power/pmic.h>
+
+#define RAA215300_REG_COUNT 0x80
+
+static int raa215300_reg_count(struct udevice *dev)
+{
+       return RAA215300_REG_COUNT;
+}
+
+static struct dm_pmic_ops raa215300_ops = {
+       .reg_count = raa215300_reg_count,
+       .read = dm_i2c_read,
+       .write = dm_i2c_write,
+};
+
+static const struct udevice_id raa215300_ids[] = {
+       { .compatible = "renesas,raa215300" },
+       { /* sentinel */ }
+};
+
+static int raa215300_bind(struct udevice *dev)
+{
+       return 0;
+}
+
+U_BOOT_DRIVER(raa215300_pmic) = {
+       .name = "raa215300_pmic",
+       .id = UCLASS_PMIC,
+       .of_match = raa215300_ids,
+       .bind = raa215300_bind,
+       .ops = &raa215300_ops,
+};