bus: ti-sysc: Add support for using ti-sysc for MCAN on dra76x

The dra76x MCAN generic interconnect module has a its own
format for the bits in the control registers.

Therefore add a new module type, new regbits and new capabilities
specific to the MCAN module.

Acked-by: Rob Herring <robh@kernel.org>
CC: Tony Lindgren <tony@atomide.com>
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

4 files changed, 22 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/bus/ti-sysc.txt b/Documentation/devicetree/bindings/bus/ti-sysc.txt
index d8ed5b780ed9..91dc2333af01 100644
--- a/Documentation/devicetree/bindings/bus/ti-sysc.txt
+++ b/Documentation/devicetree/bindings/bus/ti-sysc.txt
@@ -36,6 +36,7 @@ Required standard properties:
                 "ti,sysc-omap-aes"
                 "ti,sysc-mcasp"
                 "ti,sysc-usb-host-fs"
+                "ti,sysc-dra7-mcan"
 
 - reg           shall have register areas implemented for the interconnect
                 target module in question such as revision, sysc and syss
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 80d60f43db56..c9db5369e2ec 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1552,6 +1552,23 @@ static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
         .regbits = &sysc_regbits_omap4_usb_host_fs,
 };
 
+static const struct sysc_regbits sysc_regbits_dra7_mcan = {
+        .dmadisable_shift = -ENODEV,
+        .midle_shift = -ENODEV,
+        .sidle_shift = -ENODEV,
+        .clkact_shift = -ENODEV,
+        .enwkup_shift = 4,
+        .srst_shift = 0,
+        .emufree_shift = -ENODEV,
+        .autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_dra7_mcan = {
+        .type = TI_SYSC_DRA7_MCAN,
+        .sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
+        .regbits = &sysc_regbits_dra7_mcan,
+};
+
 static int sysc_init_pdata(struct sysc *ddata)
 {
         struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
@@ -1743,6 +1760,7 @@ static const struct of_device_id sysc_match[] = {
         { .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
         { .compatible = "ti,sysc-usb-host-fs",
           .data = &sysc_omap4_usb_host_fs, },
+        { .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
         {  },
 };
 MODULE_DEVICE_TABLE(of, sysc_match);
diff --git a/include/dt-bindings/bus/ti-sysc.h b/include/dt-bindings/bus/ti-sysc.h
index 2c005376ac0e..7138384e2ef9 100644
--- a/include/dt-bindings/bus/ti-sysc.h
+++ b/include/dt-bindings/bus/ti-sysc.h
@@ -15,6 +15,8 @@
 /* SmartReflex sysc found on 36xx and later */
 #define SYSC_OMAP3_SR_ENAWAKEUP         (1 << 26)
 
+#define SYSC_DRA7_MCAN_ENAWAKEUP        (1 << 4)
+
 /* SYSCONFIG STANDBYMODE/MIDLEMODE/SIDLEMODE supported by hardware */
 #define SYSC_IDLE_FORCE                 0
 #define SYSC_IDLE_NO                    1
diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
index 990aad477458..2efa3470a451 100644
--- a/include/linux/platform_data/ti-sysc.h
+++ b/include/linux/platform_data/ti-sysc.h
@@ -14,6 +14,7 @@ enum ti_sysc_module_type {
         TI_SYSC_OMAP4_SR,
         TI_SYSC_OMAP4_MCASP,
         TI_SYSC_OMAP4_USB_HOST_FS,
+        TI_SYSC_DRA7_MCAN,
 };
 
 struct ti_sysc_cookie {