3 files changed, 17 insertions, 24 deletions

diff --git a/arch/arm/boot/dts/am33xx-l4.dtsi b/arch/arm/boot/dts/am33xx-l4.dtsi
index ca6d9f02a800..ced1a19d5f89 100644
--- a/arch/arm/boot/dts/am33xx-l4.dtsi
+++ b/arch/arm/boot/dts/am33xx-l4.dtsi
@@ -1759,11 +1759,10 @@
                 target-module@cc000 {                   /* 0x481cc000, ap 60 46.0 */
                         compatible = "ti,sysc-omap4", "ti,sysc";
                         ti,hwmods = "d_can0";
-                        reg = <0xcc000 0x4>;
-                        reg-names = "rev";
                         /* Domains (P, C): per_pwrdm, l4ls_clkdm */
-                        clocks = <&l4ls_clkctrl AM3_L4LS_D_CAN0_CLKCTRL 0>;
-                        clock-names = "fck";
+                        clocks = <&l4ls_clkctrl AM3_L4LS_D_CAN0_CLKCTRL 0>,
+                                 <&dcan0_fck>;
+                        clock-names = "fck", "osc";
                         #address-cells = <1>;
                         #size-cells = <1>;
                         ranges = <0x0 0xcc000 0x2000>;
@@ -1782,11 +1781,10 @@
                 target-module@d0000 {                   /* 0x481d0000, ap 62 42.0 */
                         compatible = "ti,sysc-omap4", "ti,sysc";
                         ti,hwmods = "d_can1";
-                        reg = <0xd0000 0x4>;
-                        reg-names = "rev";
                         /* Domains (P, C): per_pwrdm, l4ls_clkdm */
-                        clocks = <&l4ls_clkctrl AM3_L4LS_D_CAN1_CLKCTRL 0>;
-                        clock-names = "fck";
+                        clocks = <&l4ls_clkctrl AM3_L4LS_D_CAN1_CLKCTRL 0>,
+                                 <&dcan1_fck>;
+                        clock-names = "fck", "osc";
                         #address-cells = <1>;
                         #size-cells = <1>;
                         ranges = <0x0 0xd0000 0x2000>;
diff --git a/arch/arm/boot/dts/am437x-l4.dtsi b/arch/arm/boot/dts/am437x-l4.dtsi
index 85c6f4ff1824..989cb60b9029 100644
--- a/arch/arm/boot/dts/am437x-l4.dtsi
+++ b/arch/arm/boot/dts/am437x-l4.dtsi
@@ -1575,8 +1575,6 @@
                 target-module@cc000 {                   /* 0x481cc000, ap 50 46.0 */
                         compatible = "ti,sysc-omap4", "ti,sysc";
                         ti,hwmods = "d_can0";
-                        reg = <0xcc000 0x4>;
-                        reg-names = "rev";
                         /* Domains (P, C): per_pwrdm, l4ls_clkdm */
                         clocks = <&l4ls_clkctrl AM4_L4LS_D_CAN0_CLKCTRL 0>;
                         clock-names = "fck";
@@ -1596,8 +1594,6 @@
                 target-module@d0000 {                   /* 0x481d0000, ap 52 3a.0 */
                         compatible = "ti,sysc-omap4", "ti,sysc";
                         ti,hwmods = "d_can1";
-                        reg = <0xd0000 0x4>;
-                        reg-names = "rev";
                         /* Domains (P, C): per_pwrdm, l4ls_clkdm */
                         clocks = <&l4ls_clkctrl AM4_L4LS_D_CAN1_CLKCTRL 0>;
                         clock-names = "fck";
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 308475ed4b32..b72741668c92 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -660,12 +660,6 @@ static int sysc_check_registers(struct sysc *ddata)
                 nr_regs++;
         }
 
-        if (nr_regs < 1) {
-                dev_err(ddata->dev, "missing registers\n");
-
-                return -EINVAL;
-        }
-
         if (nr_matches > nr_regs) {
                 dev_err(ddata->dev, "overlapping registers: (%i/%i)",
                         nr_regs, nr_matches);
@@ -691,12 +685,18 @@ static int sysc_ioremap(struct sysc *ddata)
 {
         int size;
 
-        size = max3(ddata->offsets[SYSC_REVISION],
-                    ddata->offsets[SYSC_SYSCONFIG],
-                    ddata->offsets[SYSC_SYSSTATUS]);
+        if (ddata->offsets[SYSC_REVISION] < 0 &&
+            ddata->offsets[SYSC_SYSCONFIG] < 0 &&
+            ddata->offsets[SYSC_SYSSTATUS] < 0) {
+                size = ddata->module_size;
+        } else {
+                size = max3(ddata->offsets[SYSC_REVISION],
+                            ddata->offsets[SYSC_SYSCONFIG],
+                            ddata->offsets[SYSC_SYSSTATUS]);
 
-        if (size < 0 || (size + sizeof(u32)) > ddata->module_size)
-                return -EINVAL;
+                if ((size + sizeof(u32)) > ddata->module_size)
+                        return -EINVAL;
+        }
 
         ddata->module_va = devm_ioremap(ddata->dev,
                                         ddata->module_pa,
@@ -1128,7 +1128,6 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
         SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902,
                    0xffff00f0, 0),
         SYSC_QUIRK("dcan", 0, 0, -1, -1, 0xffffffff, 0xffffffff, 0),
-        SYSC_QUIRK("dcan", 0, 0, -1, -1, 0x00001401, 0xffffffff, 0),
         SYSC_QUIRK("dmic", 0, 0, 0x10, -1, 0x50010000, 0xffffffff, 0),
         SYSC_QUIRK("dwc3", 0, 0, 0x10, -1, 0x500a0200, 0xffffffff, 0),
         SYSC_QUIRK("epwmss", 0, 0, 0x4, -1, 0x47400001, 0xffffffff, 0),