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 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot