This pmic includes GPIOs which should have their own driver. Add
a driver to support these.
Signed-off-by: Simon Glass <s...@chromium.org>
Reviewed-by: Lukasz Majewski <lu...@denx.de>
---
Changes in v2: None
drivers/power/pmic/as3722_gpio.c | 120 +++++++++++++++++++++++++++++++++++++++
include/power/as3722.h | 5 ++
2 files changed, 125 insertions(+)
create mode 100644 drivers/power/pmic/as3722_gpio.c
diff --git a/drivers/power/pmic/as3722_gpio.c b/drivers/power/pmic/as3722_gpio.c
new file mode 100644
index 0000000000..d0b681ca4a
--- /dev/null
+++ b/drivers/power/pmic/as3722_gpio.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2014 NVIDIA Corporation
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/gpio.h>
+#include <power/as3722.h>
+#include <power/pmic.h>
+
+#define NUM_GPIOS 8
+
+int as3722_gpio_configure(struct udevice *pmic, unsigned int gpio,
+ unsigned long flags)
+{
+ u8 value = 0;
+ int err;
+
+ if (flags & AS3722_GPIO_OUTPUT_VDDH)
+ value |= AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
+
+ if (flags & AS3722_GPIO_INVERT)
+ value |= AS3722_GPIO_CONTROL_INVERT;
+
+ err = pmic_reg_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
+ if (err) {
+ error("failed to configure GPIO#%u: %d", gpio, err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int as3722_gpio_set_value(struct udevice *dev, unsigned int gpio,
+ int level)
+{
+ struct udevice *pmic = dev_get_parent(dev);
+ const char *l;
+ u8 value;
+ int err;
+
+ if (gpio >= NUM_GPIOS)
+ return -EINVAL;
+
+ err = pmic_reg_read(pmic, AS3722_GPIO_SIGNAL_OUT);
+ if (err < 0) {
+ error("failed to read GPIO signal out register: %d", err);
+ return err;
+ }
+ value = err;
+
+ if (level == 0) {
+ value &= ~(1 << gpio);
+ l = "low";
+ } else {
+ value |= 1 << gpio;
+ l = "high";
+ }
+
+ err = pmic_reg_write(pmic, AS3722_GPIO_SIGNAL_OUT, value);
+ if (err) {
+ error("failed to set GPIO#%u %s: %d", gpio, l, err);
+ return err;
+ }
+
+ return 0;
+}
+
+int as3722_gpio_direction_output(struct udevice *dev, unsigned int gpio,
+ int value)
+{
+ struct udevice *pmic = dev_get_parent(dev);
+ int err;
+
+ if (gpio > 7)
+ return -EINVAL;
+
+ if (value == 0)
+ value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL;
+ else
+ value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
+
+ err = pmic_reg_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
+ if (err) {
+ error("failed to configure GPIO#%u as output: %d", gpio, err);
+ return err;
+ }
+
+ err = as3722_gpio_set_value(pmic, gpio, value);
+ if (err < 0) {
+ error("failed to set GPIO#%u high: %d", gpio, err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int as3722_gpio_probe(struct udevice *dev)
+{
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+ uc_priv->gpio_count = NUM_GPIOS;
+ uc_priv->bank_name = "as3722_";
+
+ return 0;
+}
+
+static const struct dm_gpio_ops gpio_as3722_ops = {
+ .direction_output = as3722_gpio_direction_output,
+ .set_value = as3722_gpio_set_value,
+};
+
+U_BOOT_DRIVER(gpio_as3722) = {
+ .name = "gpio_as3722",
+ .id = UCLASS_GPIO,
+ .ops = &gpio_as3722_ops,
+ .probe = as3722_gpio_probe,
+};
diff --git a/include/power/as3722.h b/include/power/as3722.h
index 14afa0c81a..713e79840f 100644
--- a/include/power/as3722.h
+++ b/include/power/as3722.h
@@ -20,6 +20,11 @@
#define AS3722_ASIC_ID1 0x90
#define AS3722_ASIC_ID2 0x91
+#define AS3722_GPIO_CONTROL(n) (0x08 + (n))
+#define AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH (1 << 0)
+#define AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL (7 << 0)
+#define AS3722_GPIO_CONTROL_INVERT (1 << 7)
+
struct udevice;
int as3722_init(struct udevice **devp);
--
2.13.0.506.g27d5fe0cd-goog
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