7 files changed, 76 insertions, 0 deletions

diff --git a/drivers/clk/ingenic/jz4725b-cgu.c b/drivers/clk/ingenic/jz4725b-cgu.c
index 15d61793f53b..590e9c85cb25 100644
--- a/drivers/clk/ingenic/jz4725b-cgu.c
+++ b/drivers/clk/ingenic/jz4725b-cgu.c
@@ -87,6 +87,11 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = {
 
 	[JZ4725B_CLK_CCLK] = {
 		"cclk", CGU_CLK_DIV,
+		/*
+		 * Disabling the CPU clock or any parent clocks will hang the
+		 * system; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
 		.div = {
 			CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
@@ -114,6 +119,11 @@ static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = {
 
 	[JZ4725B_CLK_MCLK] = {
 		"mclk", CGU_CLK_DIV,
+		/*
+		 * Disabling MCLK or its parents will render DRAM
+		 * inaccessible; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
 		.div = {
 			CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0,
diff --git a/drivers/clk/ingenic/jz4740-cgu.c b/drivers/clk/ingenic/jz4740-cgu.c
index 43ffb62c42bb..3e0a30574ebb 100644
--- a/drivers/clk/ingenic/jz4740-cgu.c
+++ b/drivers/clk/ingenic/jz4740-cgu.c
@@ -102,6 +102,11 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
 
 	[JZ4740_CLK_CCLK] = {
 		"cclk", CGU_CLK_DIV,
+		/*
+		 * Disabling the CPU clock or any parent clocks will hang the
+		 * system; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
 		.div = {
 			CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
@@ -129,6 +134,11 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
 
 	[JZ4740_CLK_MCLK] = {
 		"mclk", CGU_CLK_DIV,
+		/*
+		 * Disabling MCLK or its parents will render DRAM
+		 * inaccessible; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
 		.div = {
 			CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0,
diff --git a/drivers/clk/ingenic/jz4760-cgu.c b/drivers/clk/ingenic/jz4760-cgu.c
index 8fdd383560fb..ecd395ac8a28 100644
--- a/drivers/clk/ingenic/jz4760-cgu.c
+++ b/drivers/clk/ingenic/jz4760-cgu.c
@@ -143,6 +143,11 @@ static const struct ingenic_cgu_clk_info jz4760_cgu_clocks[] = {
 
 	[JZ4760_CLK_CCLK] = {
 		"cclk", CGU_CLK_DIV,
+		/*
+		 * Disabling the CPU clock or any parent clocks will hang the
+		 * system; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4760_CLK_PLL0, },
 		.div = {
 			CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
@@ -175,6 +180,11 @@ static const struct ingenic_cgu_clk_info jz4760_cgu_clocks[] = {
 	},
 	[JZ4760_CLK_MCLK] = {
 		"mclk", CGU_CLK_DIV,
+		/*
+		 * Disabling MCLK or its parents will render DRAM
+		 * inaccessible; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4760_CLK_PLL0, },
 		.div = {
 			CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0,
diff --git a/drivers/clk/ingenic/jz4770-cgu.c b/drivers/clk/ingenic/jz4770-cgu.c
index 7ef91257630e..6ae1740367f9 100644
--- a/drivers/clk/ingenic/jz4770-cgu.c
+++ b/drivers/clk/ingenic/jz4770-cgu.c
@@ -149,6 +149,11 @@ static const struct ingenic_cgu_clk_info jz4770_cgu_clocks[] = {
 
 	[JZ4770_CLK_CCLK] = {
 		"cclk", CGU_CLK_DIV,
+		/*
+		 * Disabling the CPU clock or any parent clocks will hang the
+		 * system; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4770_CLK_PLL0, },
 		.div = {
 			CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
diff --git a/drivers/clk/ingenic/jz4780-cgu.c b/drivers/clk/ingenic/jz4780-cgu.c
index e357c228e0f1..b1dadc0a5e75 100644
--- a/drivers/clk/ingenic/jz4780-cgu.c
+++ b/drivers/clk/ingenic/jz4780-cgu.c
@@ -341,12 +341,22 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 
 	[JZ4780_CLK_CPU] = {
 		"cpu", CGU_CLK_DIV,
+		/*
+		 * Disabling the CPU clock or any parent clocks will hang the
+		 * system; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4780_CLK_CPUMUX, -1, -1, -1 },
 		.div = { CGU_REG_CLOCKCONTROL, 0, 1, 4, 22, -1, -1 },
 	},
 
 	[JZ4780_CLK_L2CACHE] = {
 		"l2cache", CGU_CLK_DIV,
+		/*
+		 * The L2 cache clock is critical if caches are enabled and
+		 * disabling it or any parent clocks will hang the system.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { JZ4780_CLK_CPUMUX, -1, -1, -1 },
 		.div = { CGU_REG_CLOCKCONTROL, 4, 1, 4, -1, -1, -1 },
 	},
@@ -380,6 +390,11 @@ static const struct ingenic_cgu_clk_info jz4780_cgu_clocks[] = {
 
 	[JZ4780_CLK_DDR] = {
 		"ddr", CGU_CLK_MUX | CGU_CLK_DIV,
+		/*
+		 * Disabling DDR clock or its parents will render DRAM
+		 * inaccessible; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { -1, JZ4780_CLK_SCLKA, JZ4780_CLK_MPLL, -1 },
 		.mux = { CGU_REG_DDRCDR, 30, 2 },
 		.div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 },
diff --git a/drivers/clk/ingenic/x1000-cgu.c b/drivers/clk/ingenic/x1000-cgu.c
index 3c4d5a77ccbd..b2ce3fb83f54 100644
--- a/drivers/clk/ingenic/x1000-cgu.c
+++ b/drivers/clk/ingenic/x1000-cgu.c
@@ -251,6 +251,11 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
 
 	[X1000_CLK_CPU] = {
 		"cpu", CGU_CLK_DIV | CGU_CLK_GATE,
+		/*
+		 * Disabling the CPU clock or any parent clocks will hang the
+		 * system; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { X1000_CLK_CPUMUX, -1, -1, -1 },
 		.div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
 		.gate = { CGU_REG_CLKGR, 30 },
@@ -258,6 +263,11 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
 
 	[X1000_CLK_L2CACHE] = {
 		"l2cache", CGU_CLK_DIV,
+		/*
+		 * The L2 cache clock is critical if caches are enabled and
+		 * disabling it or any parent clocks will hang the system.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { X1000_CLK_CPUMUX, -1, -1, -1 },
 		.div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
 	},
@@ -290,6 +300,11 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
 
 	[X1000_CLK_DDR] = {
 		"ddr", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+		/*
+		 * Disabling DDR clock or its parents will render DRAM
+		 * inaccessible; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { -1, X1000_CLK_SCLKA, X1000_CLK_MPLL, -1 },
 		.mux = { CGU_REG_DDRCDR, 30, 2 },
 		.div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 },
diff --git a/drivers/clk/ingenic/x1830-cgu.c b/drivers/clk/ingenic/x1830-cgu.c
index e01ec2dc7a1a..0fd46e50a513 100644
--- a/drivers/clk/ingenic/x1830-cgu.c
+++ b/drivers/clk/ingenic/x1830-cgu.c
@@ -225,6 +225,7 @@ static const struct ingenic_cgu_clk_info x1830_cgu_clocks[] = {
 
 	[X1830_CLK_CPU] = {
 		"cpu", CGU_CLK_DIV | CGU_CLK_GATE,
+		.flags = CLK_IS_CRITICAL,
 		.parents = { X1830_CLK_CPUMUX, -1, -1, -1 },
 		.div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
 		.gate = { CGU_REG_CLKGR1, 15 },
@@ -232,6 +233,11 @@ static const struct ingenic_cgu_clk_info x1830_cgu_clocks[] = {
 
 	[X1830_CLK_L2CACHE] = {
 		"l2cache", CGU_CLK_DIV,
+		/*
+		 * The L2 cache clock is critical if caches are enabled and
+		 * disabling it or any parent clocks will hang the system.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { X1830_CLK_CPUMUX, -1, -1, -1 },
 		.div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
 	},
@@ -264,6 +270,11 @@ static const struct ingenic_cgu_clk_info x1830_cgu_clocks[] = {
 
 	[X1830_CLK_DDR] = {
 		"ddr", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+		/*
+		 * Disabling DDR clock or its parents will render DRAM
+		 * inaccessible; mark it critical.
+		 */
+		.flags = CLK_IS_CRITICAL,
 		.parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 },
 		.mux = { CGU_REG_DDRCDR, 30, 2 },
 		.div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 },