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spmi: pmic-arb: correct duplicate APID to PPID mapping logic 

[ Upstream commit 1f1693118c ]

Correct the way that duplicate PPID mappings are handled for PMIC
arbiter v5.  The final APID mapped to a given PPID should be the
one which has write owner = APPS EE, if it exists, or if not
that, then the first APID mapped to the PPID, if it exists.

Fixes: 40f318f0ed ("spmi: pmic-arb: add support for HW version 5")
Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com>
Link: https://lore.kernel.org/r/1655004286-11493-7-git-send-email-quic_fenglinw@quicinc.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20220930005019.2663064-8-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Collins 2022-09-29 17:50:16 -07:00 committed by Greg Kroah-Hartman
parent 27b0f1ef69
commit 484578e916
1 changed files with 7 additions and 6 deletions
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13
drivers/spmi/spmi-pmic-arb.c
View File

@ -992,7 +992,8 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
* version 5, there is more than one APID mapped to each PPID.
* The owner field for each of these mappings specifies the EE which is
* allowed to write to the APID. The owner of the last (highest) APID
* for a given PPID will receive interrupts from the PPID.
* which has the IRQ owner bit set for a given PPID will receive
* interrupts from the PPID.
*/
for (i = 0; ; i++, apidd++) {
offset = pmic_arb->ver_ops->apid_map_offset(i);
@ -1015,16 +1016,16 @@ static int pmic_arb_read_apid_map_v5(struct spmi_pmic_arb *pmic_arb)
apid = pmic_arb->ppid_to_apid[ppid] & ~PMIC_ARB_APID_VALID;
prev_apidd = &pmic_arb->apid_data[apid];
if (valid && is_irq_ee &&
prev_apidd->write_ee == pmic_arb->ee) {
if (!valid || apidd->write_ee == pmic_arb->ee) {
/* First PPID mapping or one for this EE */
pmic_arb->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
} else if (valid && is_irq_ee &&
prev_apidd->write_ee == pmic_arb->ee) {
/*
* Duplicate PPID mapping after the one for this EE;
* override the irq owner
*/
prev_apidd->irq_ee = apidd->irq_ee;
} else if (!valid || is_irq_ee) {
/* First PPID mapping or duplicate for another EE */
pmic_arb->ppid_to_apid[ppid] = i | PMIC_ARB_APID_VALID;
}
apidd->ppid = ppid;