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x86: pch: Add an ioctl to read power-management info

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Add a new ioctl() request to read information about the power-management
system. This can be used to power off the device.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-04-25 21:59:01 -06:00 committed by Bin Meng
parent 079b38ba04
commit b69b603bcd
1 changed files with 18 additions and 0 deletions
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18
include/pch.h
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@ -16,6 +16,9 @@ enum pch_req_t {
/* Returns HDA config info if Azalia V1CTL enabled, -ENOENT if not */
PCH_REQ_HDA_CONFIG,
/* Fills out a struct pch_pmbase_info if available */
PCH_REQ_PMBASE_INFO,
PCH_REQ_TEST1, /* Test requests for sandbox driver */
PCH_REQ_TEST2,
PCH_REQ_TEST3,
@ -23,6 +26,21 @@ enum pch_req_t {
PCH_REQ_COUNT, /* Number of ioctrls supported */
};
/**
* struct pch_pmbase_info - Information filled in by PCH_REQ_PMBASE_INFO
*
* @pmbase: IO address of power-management controller
* @gpio0_en_ofs: Offset of GPIO0 enable register
* @pm1_sts_ofs: Offset of status register
* @pm1_cnt_ofs: Offset of control register
*/
struct pch_pmbase_info {
u16 base;
u8 gpio0_en_ofs;
u8 pm1_sts_ofs;
u8 pm1_cnt_ofs;
};
/**
* struct pch_ops - Operations for the Platform Controller Hub
*