bus: ti-sysc: Implement quirk handling for CLKDM_NOAUTO

[ Upstream commit 94f6345712b37e4bb23cb265ce4c65b9d177e75a ]

For dra7 dcan and dwc3 instances we need to block clockdomain autoidle.
Let's do this with CLKDM_NOAUTO quirk flag and enable it for dcan and
dwc3.

Cc: Keerthy <j-keerthy@ti.com>
Cc: Roger Quadros <rogerq@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index d984626..a0cecb1 100644 (file)
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -479,7 +479,7 @@ static void sysc_clkdm_deny_idle(struct sysc *ddata)
 {
        struct ti_sysc_platform_data *pdata;
 
-       if (ddata->legacy_mode)
+       if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
                return;
 
        pdata = dev_get_platdata(ddata->dev);
@@ -491,7 +491,7 @@ static void sysc_clkdm_allow_idle(struct sysc *ddata)
 {
        struct ti_sysc_platform_data *pdata;
 
-       if (ddata->legacy_mode)
+       if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
                return;
 
        pdata = dev_get_platdata(ddata->dev);
@@ -1251,6 +1251,12 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
        /* Quirks that need to be set based on detected module */
        SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff,
                   SYSC_MODULE_QUIRK_AESS),
+       SYSC_QUIRK("dcan", 0x48480000, 0x20, -1, -1, 0xa3170504, 0xffffffff,
+                  SYSC_QUIRK_CLKDM_NOAUTO),
+       SYSC_QUIRK("dwc3", 0x48880000, 0, 0x10, -1, 0x500a0200, 0xffffffff,
+                  SYSC_QUIRK_CLKDM_NOAUTO),
+       SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -1, 0x500a0200, 0xffffffff,
+                  SYSC_QUIRK_CLKDM_NOAUTO),
        SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
                   SYSC_MODULE_QUIRK_HDQ1W),
        SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,

diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
index 8cfe570..2cbde65 100644 (file)
--- a/include/linux/platform_data/ti-sysc.h
+++ b/include/linux/platform_data/ti-sysc.h
@@ -49,6 +49,7 @@ struct sysc_regbits {
        s8 emufree_shift;
 };
 
+#define SYSC_QUIRK_CLKDM_NOAUTO                BIT(21)
 #define SYSC_QUIRK_FORCE_MSTANDBY      BIT(20)
 #define SYSC_MODULE_QUIRK_AESS         BIT(19)
 #define SYSC_MODULE_QUIRK_SGX          BIT(18)