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0cb160f1b6
This driver adds the base support of pinctrl over SCMI. The driver
does two main things. First, it allows you to configure the initial
pin states. Secondly, it's used a base to build a GPIO driver on
top of it.
To configure the states then add a pinmux config to the scmi_pinctrl
section:
scmi_pinctrl: protocol@19 {
reg = <0x19>;
pinmux1: pinmux_test {
pinmux = <0 1 0xFFFFFFFF 18 1
0 2 0xFFFFFFFF 18 1
0 3 0xFFFFFFFF 18 1>;
function = "f_gpio1";
groups = "grp_1", "grp_3";
};
};
Under linux the pinctrl subsystem will parse the function and group
properties and use that to handle muxing. However, under u-boot the
pin muxing is done using the "pinmux" property, which feeds raw SCMI
pinctrl PINCTRL_SETTINGS_CONFIGURE commands to the server. The
numbers are: selector, identifier, function_id, config_type, and
config_value. In the example above, it sets pins 1, 2, and 3 to 1.
The linux-kernel ignores this pinmux property.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2019-2020 Linaro Limited.
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*/
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#ifndef _SCMI_AGENT_UCLASS_H
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#define _SCMI_AGENT_UCLASS_H
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#include <scmi_protocols.h>
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#include <dm/device.h>
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struct scmi_msg;
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struct scmi_channel;
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/**
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* struct scmi_agent_priv - private data maintained by agent instance
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* @version: Version
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* @num_agents: Number of agents
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* @num_protocols: Number of protocols
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* @impl_version: Implementation version
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* @protocols: Array of protocol IDs
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* @vendor: Vendor name
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* @sub_vendor: Sub-vendor name
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* @agent_name: Agent name
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* @agent_id: Identifier of agent
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* @base_dev: SCMI base protocol device
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* @pwdom_dev: SCMI power domain management protocol device
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* @clock_dev: SCMI clock protocol device
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* @resetdom_dev: SCMI reset domain protocol device
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* @voltagedom_dev: SCMI voltage domain protocol device
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* @pinctrl_dev: SCMI pin control protocol device
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*/
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struct scmi_agent_priv {
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u32 version;
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u32 num_agents;
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u32 num_protocols;
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u32 impl_version;
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u8 *protocols;
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u8 *vendor;
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u8 *sub_vendor;
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u8 *agent_name;
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u32 agent_id;
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struct udevice *base_dev;
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#if IS_ENABLED(CONFIG_SCMI_POWER_DOMAIN)
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struct udevice *pwdom_dev;
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#endif
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#if IS_ENABLED(CONFIG_CLK_SCMI)
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struct udevice *clock_dev;
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#endif
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#if IS_ENABLED(CONFIG_RESET_SCMI)
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struct udevice *resetdom_dev;
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#endif
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#if IS_ENABLED(CONFIG_DM_REGULATOR_SCMI)
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struct udevice *voltagedom_dev;
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#endif
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#if IS_ENABLED(CONFIG_PINCTRL_SCMI) || IS_ENABLED(CONFIG_PINCTRL_IMX_SCMI)
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struct udevice *pinctrl_dev;
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#endif
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#if IS_ENABLED(CONFIG_SCMI_ID_VENDOR_80)
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struct udevice *vendor_dev_80;
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#endif
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#if IS_ENABLED(CONFIG_SCMI_ID_VENDOR_82)
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struct udevice *vendor_dev_82;
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#endif
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};
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static inline u32 scmi_version(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->version;
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}
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static inline u32 scmi_num_agents(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->num_agents;
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}
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static inline u32 scmi_num_protocols(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->num_protocols;
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}
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static inline u32 scmi_impl_version(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->impl_version;
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}
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static inline u8 *scmi_protocols(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->protocols;
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}
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static inline u8 *scmi_vendor(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->vendor;
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}
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static inline u8 *scmi_sub_vendor(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->sub_vendor;
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}
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static inline u8 *scmi_agent_name(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->agent_name;
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}
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static inline u32 scmi_agent_id(struct udevice *dev)
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{
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return ((struct scmi_agent_priv *)dev_get_uclass_plat(dev))->agent_id;
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}
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/**
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* struct scmi_transport_ops - The functions that a SCMI transport layer must implement.
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*/
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struct scmi_agent_ops {
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/*
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* of_get_channel - Get SCMI channel from SCMI agent device tree node
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*
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* @dev: SCMI agent device using the transport
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* @protocol: SCMI protocol device using the transport
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* @channel: Output reference to SCMI channel upon success
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* Return 0 upon success and a negative errno on failure
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*/
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int (*of_get_channel)(struct udevice *dev, struct udevice *protocol,
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struct scmi_channel **channel);
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/*
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* process_msg - Request transport to get the SCMI message processed
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*
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* @dev: SCMI agent device using the transport
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* @msg: SCMI message to be transmitted
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*/
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int (*process_msg)(struct udevice *dev, struct scmi_channel *channel,
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struct scmi_msg *msg);
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};
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struct scmi_proto_match {
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unsigned int proto_id;
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};
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struct scmi_proto_driver {
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struct driver *driver;
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const struct scmi_proto_match *match;
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};
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#define U_BOOT_SCMI_PROTO_DRIVER(__name, __match) \
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ll_entry_declare(struct scmi_proto_driver, __name, scmi_proto_driver) = { \
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.driver = llsym(struct driver, __name, driver), \
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.match = __match, \
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}
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#endif /* _SCMI_TRANSPORT_UCLASS_H */
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