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firmware: xilinx: Add reset API's

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This Patch Adds reset API's to support release, assert
and status functionalities by using firmware interface.

Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Nava kishore Manne 2019-01-25 13:16:52 +05:30 • committed by Michal Simek
parent bfeffd1552
commit bc3843d4d3
2 changed files with 176 additions and 0 deletions
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40
drivers/firmware/xilinx/zynqmp.c
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@ -469,6 +469,44 @@ static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
arg1, arg2, out);
}
/**
* zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
* @reset: Reset to be configured
* @assert_flag: Flag stating should reset be asserted (1) or
* released (0)
*
* Return: Returns status, either success or error+reason
*/
static int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset,
const enum zynqmp_pm_reset_action assert_flag)
{
return zynqmp_pm_invoke_fn(PM_RESET_ASSERT, reset, assert_flag,
0, 0, NULL);
}
/**
* zynqmp_pm_reset_get_status - Get status of the reset
* @reset: Reset whose status should be returned
* @status: Returned status
*
* Return: Returns status, either success or error+reason
*/
static int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset,
u32 *status)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!status)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_RESET_GET_STATUS, reset, 0,
0, 0, ret_payload);
*status = ret_payload[1];
return ret;
}
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.query_data = zynqmp_pm_query_data,
@ -482,6 +520,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.clock_setparent = zynqmp_pm_clock_setparent,
.clock_getparent = zynqmp_pm_clock_getparent,
.ioctl = zynqmp_pm_ioctl,
.reset_assert = zynqmp_pm_reset_assert,
.reset_get_status = zynqmp_pm_reset_get_status,
};
/**