[PATCH v2 2/3] ARM: dts: ti/omap: describe omap3 i2c via ti-sysc

[Andreas Kemnade <andreas@kemnade.info>]

ti,hwmods is deprecated, and the power management there is working a bit
different than the one in the ti-sysc way. So if something is changed
with pm incfluence, it has to be tested on both. To reduce that maintenance
work, convert to ti-sysc. Also fixes an actual crash with OMAP3 and
suspend.  That was caused by a commit enabling i2c access in later phases
of suspend until the noirq phase. But that causes some state expectation
mismatch between omap_device.c code and the i2c code leading to the
following:

Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa060004
[...]
PC is at omap_i2c_runtime_suspend+0x1c/0xd8
[...]
Call trace:
omap_i2c_runtime_suspend from _od_suspend_noirq+0x44/0xe0
_od_suspend_noirq from dpm_run_callback+0x4c/0x1f0
dpm_run_callback from device_suspend_noirq+0x208/0x594
device_suspend_noirq from dpm_suspend_noirq+0x1c8/0x3a4
dpm_suspend_noirq from suspend_devices_and_enter+0x10c/0x840
suspend_devices_and_enter from pm_suspend+0x25c/0x3fc
pm_suspend from state_store+0x114/0x130

Fixes: 7da7fd7e66ac9 ("i2c: omap: wakeup the controller during suspend() callback")
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 arch/arm/boot/dts/ti/omap/omap3.dtsi | 96 +++++++++++++++++++++++++++++-------
 1 file changed, 78 insertions(+), 18 deletions(-)

diff --git a/arch/arm/boot/dts/ti/omap/omap3.dtsi b/arch/arm/boot/dts/ti/omap/omap3.dtsi
index 447736d2e53ca..2ee5fd4888ce5 100644
--- a/arch/arm/boot/dts/ti/omap/omap3.dtsi
+++ b/arch/arm/boot/dts/ti/omap/omap3.dtsi
@@ -396,31 +396,91 @@ uart3: serial@49020000 {
 			clock-frequency = <48000000>;
 		};
 
-		i2c1: i2c@48070000 {
-			compatible = "ti,omap3-i2c";
-			reg = <0x48070000 0x80>;
-			interrupts = <56>;
+		i2c1_target: target-module@48070000 {
+			compatible = "ti,sysc-omap2", "ti,sysc";
+			reg = <0x48070000 0x4>,
+			      <0x48070020 0x4>,
+			      <0x48070010 0x4>;
+			reg-names = "rev", "sysc", "syss";
+			ti,sysc-mask = <(SYSC_OMAP2_CLOCKACTIVITY |
+					 SYSC_OMAP2_ENAWAKEUP |
+					 SYSC_OMAP2_SOFTRESET |
+					 SYSC_OMAP2_AUTOIDLE)>;
+			ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			ti,syss-mask = <1>;
+			clocks = <&i2c1_fck>, <&i2c1_ick>;
+			clock-names = "fck", "ick";
 			#address-cells = <1>;
-			#size-cells = <0>;
-			ti,hwmods = "i2c1";
+			#size-cells = <1>;
+			ranges = <0 0x48070000 0x1000>;
+
+			i2c1: i2c@0 {
+				compatible = "ti,omap3-i2c";
+				reg = <0x0 0x80>;
+				interrupts = <56>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
 		};
 
-		i2c2: i2c@48072000 {
-			compatible = "ti,omap3-i2c";
-			reg = <0x48072000 0x80>;
-			interrupts = <57>;
+		i2c2_target: target-module@48072000 {
+			compatible = "ti,sysc-omap2", "ti,sysc";
+			reg = <0x48072000 0x4>,
+			      <0x48072020 0x4>,
+			      <0x48072010 0x4>;
+			reg-names = "rev", "sysc", "syss";
+			ti,sysc-mask = <(SYSC_OMAP2_CLOCKACTIVITY |
+					 SYSC_OMAP2_ENAWAKEUP |
+					 SYSC_OMAP2_SOFTRESET |
+					 SYSC_OMAP2_AUTOIDLE)>;
+			ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			ti,syss-mask = <1>;
+			clocks = <&i2c2_fck>, <&i2c2_ick>;
+			clock-names = "fck", "ick";
 			#address-cells = <1>;
-			#size-cells = <0>;
-			ti,hwmods = "i2c2";
+			#size-cells = <1>;
+			ranges = <0 0x48072000 0x1000>;
+
+			i2c2: i2c@0 {
+				compatible = "ti,omap3-i2c";
+				reg = <0x0 0x80>;
+				interrupts = <57>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
 		};
 
-		i2c3: i2c@48060000 {
-			compatible = "ti,omap3-i2c";
-			reg = <0x48060000 0x80>;
-			interrupts = <61>;
+		i2c3_target: target-module@48060000 {
+			compatible = "ti,sysc-omap2", "ti,sysc";
+			reg = <0x48060000 0x4>,
+			      <0x48060020 0x4>,
+			      <0x48060010 0x4>;
+			reg-names = "rev", "sysc", "syss";
+			ti,sysc-mask = <(SYSC_OMAP2_CLOCKACTIVITY |
+					 SYSC_OMAP2_ENAWAKEUP |
+					 SYSC_OMAP2_SOFTRESET |
+					 SYSC_OMAP2_AUTOIDLE)>;
+			ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+					<SYSC_IDLE_NO>,
+					<SYSC_IDLE_SMART>;
+			ti,syss-mask = <1>;
+			clocks = <&i2c3_fck>, <&i2c3_ick>;
+			clock-names = "fck", "ick";
 			#address-cells = <1>;
-			#size-cells = <0>;
-			ti,hwmods = "i2c3";
+			#size-cells = <1>;
+			ranges = <0 0x48060000 0x1000>;
+
+			i2c3: i2c@0 {
+				compatible = "ti,omap3-i2c";
+				reg = <0x0 0x80>;
+				interrupts = <61>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+			};
 		};
 
 		mailbox: mailbox@48094000 {

-- 
2.47.3