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firmware: ti_sci: Add support for reboot core service

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Since system controller now has control over SoC power management, it
needs to be explicitly requested to reboot the SoC. Add support for
it.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Andreas Dannenberg 2018-08-27 15:57:36 +05:30 committed by Tom Rini
parent 9b87181fd2
commit f369b0f26c
3 changed files with 70 additions and 0 deletions
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47
drivers/firmware/ti_sci.c
View file

@ -1397,6 +1397,50 @@ static int ti_sci_cmd_clk_get_freq(const struct ti_sci_handle *handle,
return ret;
}
/**
* ti_sci_cmd_core_reboot() - Command to request system reset
* @handle: pointer to TI SCI handle
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle)
{
struct ti_sci_msg_req_reboot req;
struct ti_sci_msg_hdr *resp;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
int ret = 0;
if (IS_ERR(handle))
return PTR_ERR(handle);
if (!handle)
return -EINVAL;
info = handle_to_ti_sci_info(handle);
xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SYS_RESET,
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
(u32 *)&req, sizeof(req), sizeof(*resp));
if (IS_ERR(xfer)) {
ret = PTR_ERR(xfer);
dev_err(info->dev, "Message alloc failed(%d)\n", ret);
return ret;
}
ret = ti_sci_do_xfer(info, xfer);
if (ret) {
dev_err(dev, "Mbox send fail %d\n", ret);
return ret;
}
resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
if (!ti_sci_is_response_ack(resp))
return -ENODEV;
return ret;
}
/*
* ti_sci_setup_ops() - Setup the operations structures
* @info: pointer to TISCI pointer
@ -1407,6 +1451,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
struct ti_sci_board_ops *bops = &ops->board_ops;
struct ti_sci_dev_ops *dops = &ops->dev_ops;
struct ti_sci_clk_ops *cops = &ops->clk_ops;
struct ti_sci_core_ops *core_ops = &ops->core_ops;
bops->board_config = ti_sci_cmd_set_board_config;
bops->board_config_rm = ti_sci_cmd_set_board_config_rm;
@ -1439,6 +1484,8 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
cops->get_best_match_freq = ti_sci_cmd_clk_get_match_freq;
cops->set_freq = ti_sci_cmd_clk_set_freq;
cops->get_freq = ti_sci_cmd_clk_get_freq;
core_ops->reboot_device = ti_sci_cmd_core_reboot;
}
/**

11
drivers/firmware/ti_sci.h
View file

@ -95,6 +95,17 @@ struct ti_sci_msg_resp_version {
u8 abi_minor;
} __packed;
/**
* struct ti_sci_msg_req_reboot - Reboot the SoC
* @hdr: Generic Header
*
* Request type is TI_SCI_MSG_SYS_RESET, responded with a generic
* ACK/NACK message.
*/
struct ti_sci_msg_req_reboot {
struct ti_sci_msg_hdr hdr;
} __packed;
/**
* struct ti_sci_msg_board_config - Board configuration message
* @hdr: Generic Header

12
include/linux/soc/ti/ti_sci_protocol.h
View file

@ -212,16 +212,28 @@ struct ti_sci_clk_ops {
u64 *current_freq);
};
/**
* struct ti_sci_core_ops - SoC Core Operations
* @reboot_device: Reboot the SoC
* Returns 0 for successful request(ideally should never return),
* else returns corresponding error value.
*/
struct ti_sci_core_ops {
int (*reboot_device)(const struct ti_sci_handle *handle);
};
/**
* struct ti_sci_ops - Function support for TI SCI
* @board_ops: Miscellaneous operations
* @dev_ops: Device specific operations
* @clk_ops: Clock specific operations
* @core_ops: Core specific operations
*/
struct ti_sci_ops {
struct ti_sci_board_ops board_ops;
struct ti_sci_dev_ops dev_ops;
struct ti_sci_clk_ops clk_ops;
struct ti_sci_core_ops core_ops;
};
/**