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i3c: mipi-i3c-hci: Add PIO suspend and resume support

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Introduce helper functions to suspend and resume PIO operations.  These
are required to prepare for upcoming Runtime PM support, ensuring that
PIO state is properly managed during power transitions.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260113072702.16268-14-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Hunter 2026-01-13 09:26:54 +02:00 committed by Alexandre Belloni
parent ca4d4682d3
commit 8afa0dd83b
1 changed files with 14 additions and 0 deletions
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14
drivers/i3c/master/mipi-i3c-hci/pio.c
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@ -190,6 +190,18 @@ static void __hci_pio_init(struct i3c_hci *hci, u32 *size_val_ptr)
pio->enabled_irqs = STAT_ALL_ERRORS;
}
static void hci_pio_suspend(struct i3c_hci *hci)
{
pio_reg_write(INTR_SIGNAL_ENABLE, 0);
i3c_hci_sync_irq_inactive(hci);
}
static void hci_pio_resume(struct i3c_hci *hci)
{
__hci_pio_init(hci, NULL);
}
static int hci_pio_init(struct i3c_hci *hci)
{
struct hci_pio_data *pio;
@ -1059,4 +1071,6 @@ const struct hci_io_ops mipi_i3c_hci_pio = {
.request_ibi = hci_pio_request_ibi,
.free_ibi = hci_pio_free_ibi,
.recycle_ibi_slot = hci_pio_recycle_ibi_slot,
.suspend = hci_pio_suspend,
.resume = hci_pio_resume,
};