On Fri, 19 May 2017 08:31:02 -0600
Simon Glass <s...@chromium.org> wrote:
> This pmic includes GPIOs which should have their own driver. Add
> a driver to support these.
Reviewed-by: Lukasz Majewski <lu...@denx.de>
>
> Signed-off-by: Simon Glass <s...@chromium.org>
> ---
>
> 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);
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
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