[PATCH v5 6/8] ARM: dts: aspeed: yosemite5: Add power distribution board IO expanders

[Kevin Tung]

Add device tree nodes for the two IO expanders on the power
distribution board (PDB) in Yosemite5.

The updated hardware design introduces these IO expanders to support
fan presence detection, hot swap controller (HSC) fault monitoring,
and PDB CPLD update status monitoring.

Connect the IO expander interrupt to SGPIO92. This pin was previously
named ALERT_PADDLE2_SMB_N and was unused by the system. Repurpose and
rename it to FM_IOE_ALT_N to reflect its function as the PDB IO
expander interrupt.

Signed-off-by: Kevin Tung <kevin.tung.openbmc at gmail.com>
---
 .../dts/aspeed/aspeed-bmc-facebook-yosemite5.dts   | 42 +++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts
index 524597a81365ef10cd03b67d35eeb88a965cbe0a..30fb41fdaeb7a2276cdfe98654696a16cf1de5fc 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite5.dts
@@ -389,6 +389,46 @@ adc at 1d {
 		ti,mode = /bits/ 8 <1>;
 	};
 
+	/* PDB IOEXP0 */
+	pdb_io_expander0: gpio-expander at 24 {
+		compatible = "nxp,pca9555";
+		reg = <0x24>;
+		interrupt-parent = <&sgpiom0>;
+		interrupts = <92 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"FM_P52V_AUX_FLT_N","FM_P12V_AUX_ALERT_N",
+			"FM_SLOT1_HSC_FAULT","FM_SLOT2_HSC_FAULT",
+			"FM_SLOT3_HSC_FAULT","FM_SLOT4_HSC_FAULT",
+			"FM_SLOT5_HSC_FAULT","FM_SLOT6_HSC_FAULT",
+			"PRSNT_FAN0","PRSNT_FAN1",
+			"PRSNT_FAN2","PRSNT_FAN3",
+			"","",
+			"","INT_SLOT";
+	};
+
+	/* PDB IOEXP1 */
+	gpio-expander at 25 {
+		compatible = "nxp,pca9555";
+		reg = <0x25>;
+		interrupt-parent = <&pdb_io_expander0>;
+		interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"SLOT1_CM_UPDATE","SLOT2_CM_UPDATE",
+			"SLOT3_CM_UPDATE","SLOT4_CM_UPDATE",
+			"SLOT5_CM_UPDATE","SLOT6_CM_UPDATE",
+			"","",
+			"","",
+			"","",
+			"","",
+			"","";
+	};
+
 	power-sensor at 40 {
 		compatible = "ti,ina238";
 		reg = <0x40>;
@@ -937,7 +977,7 @@ &sgpiom0 {
 	"ALERT_OC_PADDLE2_N","",
 	"ALERT_OC_PWR2_N","",
 	"ALERT_OC_PWR11_N","",
-	"ALERT_PADDLE2_SMB_N","",
+	"FM_IOE_ALT_N","",
 	"ALERT_PWR14_SB2_LEAK_DETECT_N","",
 	/*bit48-bit55*/
 	"ALERT_PWR14_SB3_LEAK_DETECT_N","",

-- 
2.53.0