1 files changed, 40 insertions, 21 deletions

diff --git a/drivers/clk/at91/at91sam9n12.c b/drivers/clk/at91/at91sam9n12.c
index 630dc5d87171..751786184ae2 100644
--- a/drivers/clk/at91/at91sam9n12.c
+++ b/drivers/clk/at91/at91sam9n12.c
@@ -7,6 +7,8 @@
 
 #include "pmc.h"
 
+static DEFINE_SPINLOCK(at91sam9n12_mck_lock);
+
 static const struct clk_master_characteristics mck_characteristics = {
 	.output = { .min = 0, .max = 133333333 },
 	.divisors = { 1, 2, 4, 3 },
@@ -52,14 +54,19 @@ static const struct clk_pll_characteristics pllb_characteristics = {
 static const struct {
 	char *n;
 	char *p;
+	unsigned long flags;
 	u8 id;
 } at91sam9n12_systemck[] = {
-	{ .n = "ddrck", .p = "masterck", .id = 2 },
-	{ .n = "lcdck", .p = "masterck", .id = 3 },
-	{ .n = "uhpck", .p = "usbck",    .id = 6 },
-	{ .n = "udpck", .p = "usbck",    .id = 7 },
-	{ .n = "pck0",  .p = "prog0",    .id = 8 },
-	{ .n = "pck1",  .p = "prog1",    .id = 9 },
+	/*
+	 * ddrck feeds DDR controller and is enabled by bootloader thus we need
+	 * to keep it enabled in case there is no Linux consumer for it.
+	 */
+	{ .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL },
+	{ .n = "lcdck", .p = "masterck_div", .id = 3 },
+	{ .n = "uhpck", .p = "usbck",        .id = 6 },
+	{ .n = "udpck", .p = "usbck",        .id = 7 },
+	{ .n = "pck0",  .p = "prog0",        .id = 8 },
+	{ .n = "pck1",  .p = "prog1",        .id = 9 },
 };
 
 static const struct clk_pcr_layout at91sam9n12_pcr_layout = {
@@ -124,7 +131,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 		return;
 	mainxtal_name = of_clk_get_parent_name(np, i);
 
-	regmap = syscon_node_to_regmap(np);
+	regmap = device_node_to_regmap(np);
 	if (IS_ERR(regmap))
 		return;
 
@@ -140,14 +147,14 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 
 	bypass = of_property_read_bool(np, "atmel,osc-bypass");
 
-	hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
+	hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL,
 					bypass);
 	if (IS_ERR(hw))
 		goto err_free;
 
 	parent_names[0] = "main_rc_osc";
 	parent_names[1] = "main_osc";
-	hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
+	hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2);
 	if (IS_ERR(hw))
 		goto err_free;
 
@@ -175,9 +182,20 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 	parent_names[1] = "mainck";
 	parent_names[2] = "plladivck";
 	parent_names[3] = "pllbck";
-	hw = at91_clk_register_master(regmap, "masterck", 4, parent_names,
-				      &at91sam9x5_master_layout,
-				      &mck_characteristics);
+	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
+					   parent_names, NULL,
+					   &at91sam9x5_master_layout,
+					   &mck_characteristics,
+					   &at91sam9n12_mck_lock);
+	if (IS_ERR(hw))
+		goto err_free;
+
+	hw = at91_clk_register_master_div(regmap, "masterck_div",
+					  "masterck_pres", NULL,
+					  &at91sam9x5_master_layout,
+					  &mck_characteristics,
+					  &at91sam9n12_mck_lock,
+					  CLK_SET_RATE_GATE, 0);
 	if (IS_ERR(hw))
 		goto err_free;
 
@@ -191,15 +209,16 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 	parent_names[1] = "mainck";
 	parent_names[2] = "plladivck";
 	parent_names[3] = "pllbck";
-	parent_names[4] = "masterck";
+	parent_names[4] = "masterck_div";
 	for (i = 0; i < 2; i++) {
 		char name[6];
 
 		snprintf(name, sizeof(name), "prog%d", i);
 
 		hw = at91_clk_register_programmable(regmap, name,
-						    parent_names, 5, i,
-						    &at91sam9x5_programmable_layout);
+						    parent_names, NULL, 5, i,
+						    &at91sam9x5_programmable_layout,
+						    NULL);
 		if (IS_ERR(hw))
 			goto err_free;
 
@@ -208,8 +227,9 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 
 	for (i = 0; i < ARRAY_SIZE(at91sam9n12_systemck); i++) {
 		hw = at91_clk_register_system(regmap, at91sam9n12_systemck[i].n,
-					      at91sam9n12_systemck[i].p,
-					      at91sam9n12_systemck[i].id);
+					      at91sam9n12_systemck[i].p, NULL,
+					      at91sam9n12_systemck[i].id,
+					      at91sam9n12_systemck[i].flags);
 		if (IS_ERR(hw))
 			goto err_free;
 
@@ -220,9 +240,9 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &at91sam9n12_pcr_layout,
 							 at91sam9n12_periphck[i].n,
-							 "masterck",
+							 "masterck_div", NULL,
 							 at91sam9n12_periphck[i].id,
-							 &range);
+							 &range, INT_MIN, 0);
 		if (IS_ERR(hw))
 			goto err_free;
 
@@ -240,5 +260,4 @@ err_free:
  * The TCB is used as the clocksource so its clock is needed early. This means
  * this can't be a platform driver.
  */
-CLK_OF_DECLARE_DRIVER(at91sam9n12_pmc, "atmel,at91sam9n12-pmc",
-		      at91sam9n12_pmc_setup);
+CLK_OF_DECLARE(at91sam9n12_pmc, "atmel,at91sam9n12-pmc", at91sam9n12_pmc_setup);