From 04868b407b624c414805c9e9a79195eeb3a14829 Mon Sep 17 00:00:00 2001 From: Mateusz Kulikowski Date: Thu, 31 Mar 2016 23:12:27 +0200 Subject: 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 Reviewed-by: Simon Glass Tested-by: Simon Glass --- drivers/spmi/spmi-uclass.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 drivers/spmi/spmi-uclass.c (limited to 'drivers/spmi/spmi-uclass.c') diff --git a/drivers/spmi/spmi-uclass.c b/drivers/spmi/spmi-uclass.c new file mode 100644 index 0000000..4ddd51b --- /dev/null +++ b/drivers/spmi/spmi-uclass.c @@ -0,0 +1,48 @@ +/* + * SPMI bus uclass driver + * + * (C) Copyright 2015 Mateusz Kulikowski + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include + +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, +}; -- cgit v1.1