Merge tag 'omap-for-v5.4/ti-sysc-part2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/late

more ti-sysc driver changes for omap variants for v5.4

Few changes mostly to deal with sgx SoC glue quirk for omap36xx that
is needed for the related sgx SoC glue dts branch. The other changes
are to simplify sysc_check_one_child() sysc_check_children() to be void
functions, and detect d2d module when debugging is enabled.

* tag 'omap-for-v5.4/ti-sysc-part2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  bus: ti-sysc: Detect d2d when debug is enabled
  bus: ti-sysc: Add module enable quirk for SGX on omap36xx
  bus: ti-sysc: Change return types of functions

Link: https://lore.kernel.org/r/pull-1567016893-318461@atomide.com-2
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

2 files changed, 30 insertions, 16 deletions

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 082fb15fa174..9207ac291341 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -73,6 +73,7 @@ static const char * const clock_names[SYSC_MAX_CLOCKS] = {
  * @clk_enable_quirk: module specific clock enable quirk
  * @clk_disable_quirk: module specific clock disable quirk
  * @reset_done_quirk: module specific reset done quirk
+ * @module_enable_quirk: module specific enable quirk
  */
 struct sysc {
 	struct device *dev;
@@ -98,6 +99,7 @@ struct sysc {
 	void (*clk_enable_quirk)(struct sysc *sysc);
 	void (*clk_disable_quirk)(struct sysc *sysc);
 	void (*reset_done_quirk)(struct sysc *sysc);
+	void (*module_enable_quirk)(struct sysc *sysc);
 };
 
 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
@@ -613,8 +615,8 @@ static void sysc_check_quirk_stdout(struct sysc *ddata,
  * node but children have "ti,hwmods". These belong to the interconnect
  * target node and are managed by this driver.
  */
-static int sysc_check_one_child(struct sysc *ddata,
-				struct device_node *np)
+static void sysc_check_one_child(struct sysc *ddata,
+				 struct device_node *np)
 {
 	const char *name;
 
@@ -624,22 +626,14 @@ static int sysc_check_one_child(struct sysc *ddata,
 
 	sysc_check_quirk_stdout(ddata, np);
 	sysc_parse_dts_quirks(ddata, np, true);
-
-	return 0;
 }
 
-static int sysc_check_children(struct sysc *ddata)
+static void sysc_check_children(struct sysc *ddata)
 {
 	struct device_node *child;
-	int error;
 
-	for_each_child_of_node(ddata->dev->of_node, child) {
-		error = sysc_check_one_child(ddata, child);
-		if (error)
-			return error;
-	}
-
-	return 0;
+	for_each_child_of_node(ddata->dev->of_node, child)
+		sysc_check_one_child(ddata, child);
 }
 
 /*
@@ -792,9 +786,7 @@ static int sysc_map_and_check_registers(struct sysc *ddata)
 	if (error)
 		return error;
 
-	error = sysc_check_children(ddata);
-	if (error)
-		return error;
+	sysc_check_children(ddata);
 
 	error = sysc_parse_registers(ddata);
 	if (error)
@@ -938,6 +930,9 @@ set_autoidle:
 		sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
 	}
 
+	if (ddata->module_enable_quirk)
+		ddata->module_enable_quirk(ddata);
+
 	return 0;
 }
 
@@ -1251,6 +1246,9 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
 		   SYSC_MODULE_QUIRK_I2C),
 	SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0,
 		   SYSC_MODULE_QUIRK_I2C),
+	SYSC_QUIRK("gpu", 0x50000000, 0x14, -1, -1, 0x00010201, 0xffffffff, 0),
+	SYSC_QUIRK("gpu", 0x50000000, 0xfe00, 0xfe10, -1, 0x40000000 , 0xffffffff,
+		   SYSC_MODULE_QUIRK_SGX),
 	SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
 		   SYSC_MODULE_QUIRK_WDT),
 
@@ -1266,8 +1264,11 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
 	SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0x4edb1902, 0xffffffff, 0),
 	SYSC_QUIRK("dmic", 0, 0, 0x10, -1, 0x50010000, 0xffffffff, 0),
 	SYSC_QUIRK("dwc3", 0, 0, 0x10, -1, 0x500a0200, 0xffffffff, 0),
+	SYSC_QUIRK("d2d", 0x4a0b6000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
+	SYSC_QUIRK("d2d", 0x4a0cd000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
 	SYSC_QUIRK("epwmss", 0, 0, 0x4, -1, 0x47400001, 0xffffffff, 0),
 	SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0),
+	SYSC_QUIRK("gpu", 0, 0xfe00, 0xfe10, -1, 0x40000000 , 0xffffffff, 0),
 	SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
 	SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0),
 	SYSC_QUIRK("lcdc", 0, 0, 0x54, -1, 0x4f201000, 0xffffffff, 0),
@@ -1419,6 +1420,15 @@ static void sysc_clk_disable_quirk_i2c(struct sysc *ddata)
 	sysc_clk_quirk_i2c(ddata, false);
 }
 
+/* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */
+static void sysc_module_enable_quirk_sgx(struct sysc *ddata)
+{
+	int offset = 0xff08;	/* OCP_DEBUG_CONFIG */
+	u32 val = BIT(31);	/* THALIA_INT_BYPASS */
+
+	sysc_write(ddata, offset, val);
+}
+
 /* Watchdog timer needs a disable sequence after reset */
 static void sysc_reset_done_quirk_wdt(struct sysc *ddata)
 {
@@ -1461,6 +1471,9 @@ static void sysc_init_module_quirks(struct sysc *ddata)
 		return;
 	}
 
+	if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX)
+		ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
+
 	if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT)
 		ddata->reset_done_quirk = sysc_reset_done_quirk_wdt;
 }
diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
index 1a0905435b32..b5b7a3423ca8 100644
--- 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_MODULE_QUIRK_SGX		BIT(18)
 #define SYSC_MODULE_QUIRK_HDQ1W		BIT(17)
 #define SYSC_MODULE_QUIRK_I2C		BIT(16)
 #define SYSC_MODULE_QUIRK_WDT		BIT(15)