u-boot/drivers/spmi/spmi-uclass.c
Mateusz Kulikowski 04868b407b drivers: Add SPMI bus uclass
Qualcom processors use proprietary bus to talk with PMIC devices -
SPMI (System Power Management Interface).
On wiring level it is similar to I2C, but on protocol level, it's
multi-master and has simple autodetection capabilities.
This commit adds simple uclass that provides bus read/write interface.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
2016-04-01 17:18:12 -04:00

48 lines
976 B
C

/*
* SPMI bus uclass driver
*
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <dm/root.h>
#include <spmi/spmi.h>
#include <linux/ctype.h>
DECLARE_GLOBAL_DATA_PTR;
int spmi_reg_read(struct udevice *dev, int usid, int pid, int reg)
{
const struct dm_spmi_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->read)
return -ENOSYS;
return ops->read(dev, usid, pid, reg);
}
int spmi_reg_write(struct udevice *dev, int usid, int pid, int reg,
uint8_t value)
{
const struct dm_spmi_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->write)
return -ENOSYS;
return ops->write(dev, usid, pid, reg, value);
}
static int spmi_post_bind(struct udevice *dev)
{
return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
}
UCLASS_DRIVER(spmi) = {
.id = UCLASS_SPMI,
.name = "spmi",
.post_bind = spmi_post_bind,
};