diff mbox series

[RESEND,v6,06/10] spmi: pmic-arb: correct duplicate APID to PPID mapping logic

Message ID 1655004286-11493-7-git-send-email-quic_fenglinw@quicinc.com (mailing list archive)
State Not Applicable
Headers show
Series A bunch of fix and optimization patches in spmi-pmic-arb.c | expand

Commit Message

Fenglin Wu June 12, 2022, 3:24 a.m. UTC 
From: David Collins <collinsd@codeaurora.org>

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: 40f318f0ed67 ("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>
---
 drivers/spmi/spmi-pmic-arb.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Comments

Stephen Boyd Aug. 31, 2022, 5:40 p.m. UTC | #1 
Quoting Fenglin Wu (2022-06-11 20:24:42)
> From: David Collins <collinsd@codeaurora.org>
> 
> 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: 40f318f0ed67 ("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>
> ---

Applied to spmi-next
diff mbox series

Patch

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 56f2294..cf92abc 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -1031,7 +1031,8 @@  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);
@@ -1054,16 +1055,16 @@  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;