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path: root/drivers/clk/at91/sama5d4.c
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Diffstat (limited to 'drivers/clk/at91/sama5d4.c')
-rw-r--r--drivers/clk/at91/sama5d4.c99
1 files changed, 68 insertions, 31 deletions
diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index e358be7f6c8d..160c0bddb6a3 100644
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -7,6 +7,8 @@
#include "pmc.h"
+static DEFINE_SPINLOCK(mck_lock);
+
static const struct clk_master_characteristics mck_characteristics = {
.output = { .min = 125000000, .max = 200000000 },
.divisors = { 1, 2, 4, 3 },
@@ -16,7 +18,7 @@ static u8 plla_out[] = { 0 };
static u16 plla_icpll[] = { 0 };
-static struct clk_range plla_outputs[] = {
+static const struct clk_range plla_outputs[] = {
{ .min = 600000000, .max = 1200000000 },
};
@@ -28,19 +30,30 @@ static const struct clk_pll_characteristics plla_characteristics = {
.out = plla_out,
};
+static const struct clk_pcr_layout sama5d4_pcr_layout = {
+ .offset = 0x10c,
+ .cmd = BIT(12),
+ .pid_mask = GENMASK(6, 0),
+};
+
static const struct {
char *n;
char *p;
+ unsigned long flags;
u8 id;
} sama5d4_systemck[] = {
- { .n = "ddrck", .p = "masterck", .id = 2 },
- { .n = "lcdck", .p = "masterck", .id = 3 },
- { .n = "smdck", .p = "smdclk", .id = 4 },
- { .n = "uhpck", .p = "usbck", .id = 6 },
- { .n = "udpck", .p = "usbck", .id = 7 },
- { .n = "pck0", .p = "prog0", .id = 8 },
- { .n = "pck1", .p = "prog1", .id = 9 },
- { .n = "pck2", .p = "prog2", .id = 10 },
+ /*
+ * 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 = "smdck", .p = "smdclk", .id = 4 },
+ { .n = "uhpck", .p = "usbck", .id = 6 },
+ { .n = "udpck", .p = "usbck", .id = 7 },
+ { .n = "pck0", .p = "prog0", .id = 8 },
+ { .n = "pck1", .p = "prog1", .id = 9 },
+ { .n = "pck2", .p = "prog2", .id = 10 },
};
static const struct {
@@ -95,12 +108,17 @@ static const struct {
static const struct {
char *n;
+ unsigned long flags;
u8 id;
} sama5d4_periphck[] = {
{ .n = "dma0_clk", .id = 8 },
{ .n = "cpkcc_clk", .id = 10 },
{ .n = "aesb_clk", .id = 13 },
- { .n = "mpddr_clk", .id = 16 },
+ /*
+ * mpddr_clk 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 = "mpddr_clk", .id = 16, .flags = CLK_IS_CRITICAL },
{ .n = "matrix0_clk", .id = 18 },
{ .n = "vdec_clk", .id = 19 },
{ .n = "dma1_clk", .id = 50 },
@@ -130,13 +148,13 @@ static void __init sama5d4_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;
- sama5d4_pmc = pmc_data_allocate(PMC_MCK2 + 1,
+ sama5d4_pmc = pmc_data_allocate(PMC_PLLACK + 1,
nck(sama5d4_systemck),
- nck(sama5d4_periph32ck), 0);
+ nck(sama5d4_periph32ck), 0, 3);
if (!sama5d4_pmc)
return;
@@ -147,14 +165,14 @@ static void __init sama5d4_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;
@@ -167,7 +185,9 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
if (IS_ERR(hw))
goto err_free;
- hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck");
+ sama5d4_pmc->chws[PMC_PLLACK] = hw;
+
+ hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
if (IS_ERR(hw))
goto err_free;
@@ -177,15 +197,24 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
parent_names[1] = "mainck";
parent_names[2] = "plladivck";
parent_names[3] = "utmick";
- 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, &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, &mck_lock,
+ CLK_SET_RATE_GATE, 0);
if (IS_ERR(hw))
goto err_free;
sama5d4_pmc->chws[PMC_MCK] = hw;
- hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck");
+ hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div");
if (IS_ERR(hw))
goto err_free;
@@ -207,23 +236,27 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
parent_names[1] = "mainck";
parent_names[2] = "plladivck";
parent_names[3] = "utmick";
- parent_names[4] = "mck";
+ parent_names[4] = "masterck_div";
for (i = 0; i < 3; 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;
+
+ sama5d4_pmc->pchws[i] = hw;
}
for (i = 0; i < ARRAY_SIZE(sama5d4_systemck); i++) {
hw = at91_clk_register_system(regmap, sama5d4_systemck[i].n,
- sama5d4_systemck[i].p,
- sama5d4_systemck[i].id);
+ sama5d4_systemck[i].p, NULL,
+ sama5d4_systemck[i].id,
+ sama5d4_systemck[i].flags);
if (IS_ERR(hw))
goto err_free;
@@ -232,10 +265,12 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
for (i = 0; i < ARRAY_SIZE(sama5d4_periphck); i++) {
hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &sama5d4_pcr_layout,
sama5d4_periphck[i].n,
- "masterck",
+ "masterck_div", NULL,
sama5d4_periphck[i].id,
- &range);
+ &range, INT_MIN,
+ sama5d4_periphck[i].flags);
if (IS_ERR(hw))
goto err_free;
@@ -244,10 +279,11 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
for (i = 0; i < ARRAY_SIZE(sama5d4_periph32ck); i++) {
hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &sama5d4_pcr_layout,
sama5d4_periph32ck[i].n,
- "h32mxck",
+ "h32mxck", NULL,
sama5d4_periph32ck[i].id,
- &range);
+ &range, INT_MIN, 0);
if (IS_ERR(hw))
goto err_free;
@@ -259,6 +295,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
return;
err_free:
- pmc_data_free(sama5d4_pmc);
+ kfree(sama5d4_pmc);
}
-CLK_OF_DECLARE_DRIVER(sama5d4_pmc, "atmel,sama5d4-pmc", sama5d4_pmc_setup);
+
+CLK_OF_DECLARE(sama5d4_pmc, "atmel,sama5d4-pmc", sama5d4_pmc_setup);
generated by cgit (git 2.34.1) at 2025-12-25 08:32:45 +0000