clk: at91: allow setting PCKx parent via DT

This exposes PROGx clocks for use in assigned-clocks DeviceTree property
for selecting PCKx parent clock.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lkml.kernel.org/r/0054532c00163ddf405dad658b32f0d7d97fcc8e.1588630999.git.mirq-linux@rere.qmqm.pl
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/at91/at91rm9200.c

@@ -100,7 +100,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 
 	at91rm9200_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					    nck(at91rm9200_systemck),
-					    nck(at91rm9200_periphck), 0);
+					    nck(at91rm9200_periphck), 0, 4);
 	if (!at91rm9200_pmc)
 		return;
 
@@ -159,6 +159,8 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
 						    &at91rm9200_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		at91rm9200_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(at91rm9200_systemck); i++) {

drivers/clk/at91/at91sam9260.c

@@ -354,7 +354,8 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 
 	at91sam9260_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					    ndck(data->sck, data->num_sck),
-					    ndck(data->pck, data->num_pck), 0);
+					    ndck(data->pck, data->num_pck),
+					    0, data->num_progck);
 	if (!at91sam9260_pmc)
 		return;
 
@@ -434,6 +435,8 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 						    &at91rm9200_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		at91sam9260_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < data->num_sck; i++) {

drivers/clk/at91/at91sam9g45.c

@@ -117,7 +117,7 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 
 	at91sam9g45_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					    nck(at91sam9g45_systemck),
-					    nck(at91sam9g45_periphck), 0);
+					    nck(at91sam9g45_periphck), 0, 2);
 	if (!at91sam9g45_pmc)
 		return;
 
@@ -182,6 +182,8 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
 						    &at91sam9g45_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		at91sam9g45_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9g45_systemck); i++) {

drivers/clk/at91/at91sam9n12.c

@@ -129,7 +129,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 		return;
 
 	at91sam9n12_pmc = pmc_data_allocate(PMC_MAIN + 1,
-					   nck(at91sam9n12_systemck), 31, 0);
+					   nck(at91sam9n12_systemck), 31, 0, 2);
 	if (!at91sam9n12_pmc)
 		return;
 
@@ -198,6 +198,8 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 						    &at91sam9x5_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		at91sam9n12_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9n12_systemck); i++) {

drivers/clk/at91/at91sam9rl.c

@@ -89,7 +89,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 
 	at91sam9rl_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					   nck(at91sam9rl_systemck),
-					   nck(at91sam9rl_periphck), 0);
+					   nck(at91sam9rl_periphck), 0, 2);
 	if (!at91sam9rl_pmc)
 		return;
 
@@ -138,6 +138,8 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
 						    &at91rm9200_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		at91sam9rl_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) {

drivers/clk/at91/at91sam9x5.c

@@ -151,7 +151,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 		return;
 
 	at91sam9x5_pmc = pmc_data_allocate(PMC_MAIN + 1,
-					   nck(at91sam9x5_systemck), 31, 0);
+					   nck(at91sam9x5_systemck), 31, 0, 2);
 	if (!at91sam9x5_pmc)
 		return;
 
@@ -227,6 +227,8 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
 						    &at91sam9x5_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		at91sam9x5_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9x5_systemck); i++) {

drivers/clk/at91/pmc.c

@@ -67,6 +67,10 @@ struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data)
 		if (idx < pmc_data->ngck)
 			return pmc_data->ghws[idx];
 		break;
+	case PMC_TYPE_PROGRAMMABLE:
+		if (idx < pmc_data->npck)
+			return pmc_data->pchws[idx];
+		break;
 	default:
 		break;
 	}
@@ -77,9 +81,10 @@ struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data)
 }
 
 struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
-				   unsigned int nperiph, unsigned int ngck)
+				   unsigned int nperiph, unsigned int ngck,
+				   unsigned int npck)
 {
-	unsigned int num_clks = ncore + nsystem + nperiph + ngck;
+	unsigned int num_clks = ncore + nsystem + nperiph + ngck + npck;
 	struct pmc_data *pmc_data;
 
 	pmc_data = kzalloc(struct_size(pmc_data, hwtable, num_clks),
@@ -99,6 +104,9 @@ struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
 	pmc_data->ngck = ngck;
 	pmc_data->ghws = pmc_data->phws + nperiph;
 
+	pmc_data->npck = npck;
+	pmc_data->pchws = pmc_data->ghws + ngck;
+
 	return pmc_data;
 }
 

drivers/clk/at91/pmc.h

@@ -24,6 +24,8 @@ struct pmc_data {
 	struct clk_hw **phws;
 	unsigned int ngck;
 	struct clk_hw **ghws;
+	unsigned int npck;
+	struct clk_hw **pchws;
 
 	struct clk_hw *hwtable[];
 };
@@ -96,7 +98,8 @@ struct clk_pcr_layout {
 #define ndck(a, s) (a[s - 1].id + 1)
 #define nck(a) (a[ARRAY_SIZE(a) - 1].id + 1)
 struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
-				   unsigned int nperiph, unsigned int ngck);
+				   unsigned int nperiph, unsigned int ngck,
+				   unsigned int npck);
 
 int of_at91_get_clk_range(struct device_node *np, const char *propname,
 			  struct clk_range *range);

drivers/clk/at91/sam9x60.c

@@ -185,7 +185,7 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 	sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					nck(sam9x60_systemck),
 					nck(sam9x60_periphck),
-					nck(sam9x60_gck));
+					nck(sam9x60_gck), 8);
 	if (!sam9x60_pmc)
 		return;
 
@@ -255,6 +255,8 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 						    &sam9x60_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		sam9x60_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {

drivers/clk/at91/sama5d2.c

@@ -170,7 +170,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 	sama5d2_pmc = pmc_data_allocate(PMC_I2S1_MUX + 1,
 					nck(sama5d2_systemck),
 					nck(sama5d2_periph32ck),
-					nck(sama5d2_gck));
+					nck(sama5d2_gck), 3);
 	if (!sama5d2_pmc)
 		return;
 
@@ -268,6 +268,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 						    &sama5d2_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		sama5d2_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) {

drivers/clk/at91/sama5d3.c

@@ -127,7 +127,7 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
 
 	sama5d3_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					nck(sama5d3_systemck),
-					nck(sama5d3_periphck), 0);
+					nck(sama5d3_periphck), 0, 3);
 	if (!sama5d3_pmc)
 		return;
 
@@ -201,6 +201,8 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
 						    &at91sam9x5_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		sama5d3_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) {

drivers/clk/at91/sama5d4.c

@@ -142,7 +142,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 
 	sama5d4_pmc = pmc_data_allocate(PMC_MCK2 + 1,
 					nck(sama5d4_systemck),
-					nck(sama5d4_periph32ck), 0);
+					nck(sama5d4_periph32ck), 0, 3);
 	if (!sama5d4_pmc)
 		return;
 
@@ -224,6 +224,8 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 						    &at91sam9x5_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
+
+		sama5d4_pmc->pchws[i] = hw;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(sama5d4_systemck); i++) {

include/dt-bindings/clock/at91.h

@@ -12,6 +12,7 @@
 #define PMC_TYPE_SYSTEM		1
 #define PMC_TYPE_PERIPHERAL	2
 #define PMC_TYPE_GCK		3
+#define PMC_TYPE_PROGRAMMABLE	4
 
 #define PMC_SLOW		0
 #define PMC_MCK			1