pmic: Add support for Qualcomm PM8916 PMIC

This PMIC is connected on SPMI bus so needs SPMI support enabled.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

diff --git a/doc/device-tree-bindings/pmic/pm8916.txt b/doc/device-tree-bindings/pmic/pm8916.txt
new file mode 100644 (file)
index 0000000..15c598b
--- /dev/null
+++ b/doc/device-tree-bindings/pmic/pm8916.txt
@@ -0,0 +1,18 @@
+Qualcomm pm8916 PMIC
+
+This PMIC is connected using SPMI bus so should be child of SPMI bus controller.
+
+Required properties:
+- compatible: "qcom,spmi-pmic";
+- reg: SPMI Slave ID, size (ignored)
+- #address-cells: 0x1 (peripheral ID)
+- #size-cells: 0x1 (size of peripheral register space)
+
+Example:
+
+pm8916@0 {
+       compatible = "qcom,spmi-pmic";
+       reg = <0x0 0x1>;
+       #address-cells = <0x1>;
+       #size-cells = <0x1>;
+};

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 7f69ae1ca86a9ce6abcdc626a50fc4872f92f1cb..69f8d51885c3c64bcb640f7aa516aaeedced65aa 100644 (file)
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -54,6 +54,22 @@ config DM_PMIC_MAX77686
        This config enables implementation of driver-model pmic uclass features
        for PMIC MAX77686. The driver implements read/write operations.
 
+config PMIC_PM8916
+       bool "Enable Driver Model for Qualcomm PM8916 PMIC"
+       depends on DM_PMIC
+       ---help---
+       The PM8916 is a PMIC connected to one (or several) processors
+       with SPMI bus. It has 2 slaves with several peripherals:
+       - 18x LDO
+       - 4x GPIO
+       - Power and Reset buttons
+       - Watchdog
+       - RTC
+       - Vibrator drivers
+       - Others
+
+       Driver binding info: doc/device-tree-bindings/pmic/pm8916.txt
+
 config PMIC_RK808
        bool "Enable support for Rockchip PMIC RK808"
        depends on DM_PMIC

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index c6e8d0c610ae36c9b32d22428ff4d13216954e1d..52b4f711fbf1da6ac0cf81cdf84e5a240d130201 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze100.o
 obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o
 obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
 obj-$(CONFIG_PMIC_ACT8846) += act8846.o
+obj-$(CONFIG_PMIC_PM8916) += pm8916.o
 obj-$(CONFIG_PMIC_RK808) += rk808.o
 obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
 obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o

diff --git a/drivers/power/pmic/pm8916.c b/drivers/power/pmic/pm8916.c
new file mode 100644 (file)
index 0000000..9acf5f5
--- /dev/null
+++ b/drivers/power/pmic/pm8916.c
@@ -0,0 +1,96 @@
+/*
+ * Qualcomm pm8916 pmic driver
+ *
+ * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <dm/root.h>
+#include <power/pmic.h>
+#include <spmi/spmi.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define PID_SHIFT 8
+#define PID_MASK (0xFF << PID_SHIFT)
+#define REG_MASK 0xFF
+
+struct pm8916_priv {
+       uint16_t usid; /* Slave ID on SPMI bus */
+};
+
+static int pm8916_reg_count(struct udevice *dev)
+{
+       return 0xFFFF;
+}
+
+static int pm8916_write(struct udevice *dev, uint reg, const uint8_t *buff,
+                       int len)
+{
+       struct pm8916_priv *priv = dev_get_priv(dev);
+
+       if (len != 1)
+               return -EINVAL;
+
+       return spmi_reg_write(dev->parent, priv->usid,
+                             (reg & PID_MASK) >> PID_SHIFT, reg & REG_MASK,
+                             *buff);
+}
+
+static int pm8916_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+       struct pm8916_priv *priv = dev_get_priv(dev);
+       int val;
+
+       if (len != 1)
+               return -EINVAL;
+
+       val = spmi_reg_read(dev->parent, priv->usid,
+                           (reg & PID_MASK) >> PID_SHIFT, reg & REG_MASK);
+
+       if (val < 0)
+               return val;
+       *buff = val;
+       return 0;
+}
+
+static struct dm_pmic_ops pm8916_ops = {
+       .reg_count = pm8916_reg_count,
+       .read = pm8916_read,
+       .write = pm8916_write,
+};
+
+static const struct udevice_id pm8916_ids[] = {
+       { .compatible = "qcom,spmi-pmic" },
+       { }
+};
+
+static int pm8916_probe(struct udevice *dev)
+{
+       struct pm8916_priv *priv = dev_get_priv(dev);
+
+       priv->usid = dev_get_addr(dev);
+
+       if (priv->usid == FDT_ADDR_T_NONE)
+               return -EINVAL;
+
+       return 0;
+}
+
+
+static int pm8916_bind(struct udevice *dev)
+{
+       return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
+}
+
+U_BOOT_DRIVER(pmic_pm8916) = {
+       .name = "pmic_pm8916",
+       .id = UCLASS_PMIC,
+       .of_match = pm8916_ids,
+       .bind = pm8916_bind,
+       .probe = pm8916_probe,
+       .ops = &pm8916_ops,
+       .priv_auto_alloc_size = sizeof(struct pm8916_priv),
+};