clk: at91: mark ddr clocks as critical

Mark DDR clocks as critical for AT91 devices. These clocks are enabled
by bootloader when initializing DDR and needs to stay enabled. Up to
this patch the DDR clocks were requested from drivers/memory/atmel-sdramc.c
which does only clock request and enable. There is no need to have
a separate driver just for this, thus the atmel-sdramc.c will be deleted
in a subsequent patch.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221208114515.35179-2-claudiu.beznea@microchip.com

diff --git a/drivers/clk/at91/at91rm9200.c b/drivers/clk/at91/at91rm9200.c
index 1687094..0b86012 100644 (file)
--- a/drivers/clk/at91/at91rm9200.c
+++ b/drivers/clk/at91/at91rm9200.c
@@ -183,7 +183,7 @@ static void __init at91rm9200_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(at91rm9200_systemck); i++) {
                hw = at91_clk_register_system(regmap, at91rm9200_systemck[i].n,
                                              at91rm9200_systemck[i].p,
-                                             at91rm9200_systemck[i].id);
+                                             at91rm9200_systemck[i].id, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/at91sam9260.c b/drivers/clk/at91/at91sam9260.c
index 11550e5..b521f47 100644 (file)
--- a/drivers/clk/at91/at91sam9260.c
+++ b/drivers/clk/at91/at91sam9260.c
@@ -460,7 +460,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
        for (i = 0; i < data->num_sck; i++) {
                hw = at91_clk_register_system(regmap, data->sck[i].n,
                                              data->sck[i].p,
-                                             data->sck[i].id);
+                                             data->sck[i].id, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/at91sam9g45.c b/drivers/clk/at91/at91sam9g45.c
index 8c93444..5099669 100644 (file)
--- a/drivers/clk/at91/at91sam9g45.c
+++ b/drivers/clk/at91/at91sam9g45.c
@@ -40,9 +40,14 @@ static const struct clk_pll_characteristics plla_characteristics = {
 static const struct {
        char *n;
        char *p;
+       unsigned long flags;
        u8 id;
 } at91sam9g45_systemck[] = {
-       { .n = "ddrck", .p = "masterck_div", .id = 2 },
+       /*
+        * 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 = "uhpck", .p = "usbck",        .id = 6 },
        { .n = "pck0",  .p = "prog0",        .id = 8 },
        { .n = "pck1",  .p = "prog1",        .id = 9 },
@@ -198,7 +203,8 @@ static void __init at91sam9g45_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(at91sam9g45_systemck); i++) {
                hw = at91_clk_register_system(regmap, at91sam9g45_systemck[i].n,
                                              at91sam9g45_systemck[i].p,
-                                             at91sam9g45_systemck[i].id);
+                                             at91sam9g45_systemck[i].id,
+                                             at91sam9g45_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/at91sam9n12.c b/drivers/clk/at91/at91sam9n12.c
index 0bb1940..08a10e1 100644 (file)
--- a/drivers/clk/at91/at91sam9n12.c
+++ b/drivers/clk/at91/at91sam9n12.c
@@ -54,9 +54,14 @@ 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_div", .id = 2 },
+       /*
+        * 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 },
@@ -223,7 +228,8 @@ 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].id,
+                                             at91sam9n12_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -236,7 +242,7 @@ static void __init at91sam9n12_pmc_setup(struct device_node *np)
                                                         at91sam9n12_periphck[i].n,
                                                         "masterck_div",
                                                         at91sam9n12_periphck[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/at91sam9rl.c b/drivers/clk/at91/at91sam9rl.c
index b992137..1a1b6b2 100644 (file)
--- a/drivers/clk/at91/at91sam9rl.c
+++ b/drivers/clk/at91/at91sam9rl.c
@@ -160,7 +160,7 @@ static void __init at91sam9rl_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) {
                hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n,
                                              at91sam9rl_systemck[i].p,
-                                             at91sam9rl_systemck[i].id);
+                                             at91sam9rl_systemck[i].id, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c
index 3857db2..13e589c 100644 (file)
--- a/drivers/clk/at91/at91sam9x5.c
+++ b/drivers/clk/at91/at91sam9x5.c
@@ -41,9 +41,14 @@ static const struct clk_pll_characteristics plla_characteristics = {
 static const struct {
        char *n;
        char *p;
+       unsigned long flags;
        u8 id;
 } at91sam9x5_systemck[] = {
-       { .n = "ddrck", .p = "masterck_div", .id = 2 },
+       /*
+        * 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 = "smdck", .p = "smdclk",   .id = 4 },
        { .n = "uhpck", .p = "usbck",    .id = 6 },
        { .n = "udpck", .p = "usbck",    .id = 7 },
@@ -248,7 +253,8 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
        for (i = 0; i < ARRAY_SIZE(at91sam9x5_systemck); i++) {
                hw = at91_clk_register_system(regmap, at91sam9x5_systemck[i].n,
                                              at91sam9x5_systemck[i].p,
-                                             at91sam9x5_systemck[i].id);
+                                             at91sam9x5_systemck[i].id,
+                                             at91sam9x5_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -256,7 +262,8 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
        }
 
        if (has_lcdck) {
-               hw = at91_clk_register_system(regmap, "lcdck", "masterck_div", 3);
+               hw = at91_clk_register_system(regmap, "lcdck", "masterck_div",
+                                             3, 0);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -269,7 +276,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
                                                         at91sam9x5_periphck[i].n,
                                                         "masterck_div",
                                                         at91sam9x5_periphck[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN, 0);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -282,7 +289,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
                                                         extra_pcks[i].n,
                                                         "masterck_div",
                                                         extra_pcks[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
index 5104d40..93ea685 100644 (file)
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -445,7 +445,7 @@ at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
                                    const struct clk_pcr_layout *layout,
                                    const char *name, const char *parent_name,
                                    u32 id, const struct clk_range *range,
-                                   int chg_pid)
+                                   int chg_pid, unsigned long flags)
 {
        struct clk_sam9x5_peripheral *periph;
        struct clk_init_data init;
@@ -462,12 +462,12 @@ at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
        init.name = name;
        init.parent_names = &parent_name;
        init.num_parents = 1;
+       init.flags = flags;
        if (chg_pid < 0) {
-               init.flags = 0;
                init.ops = &sam9x5_peripheral_ops;
        } else {
-               init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE |
-                            CLK_SET_RATE_PARENT;
+               init.flags |= CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE |
+                             CLK_SET_RATE_PARENT;
                init.ops = &sam9x5_peripheral_chg_ops;
        }
 

diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 80720fd..1019365 100644 (file)
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -105,7 +105,7 @@ static const struct clk_ops system_ops = {
 
 struct clk_hw * __init
 at91_clk_register_system(struct regmap *regmap, const char *name,
-                        const char *parent_name, u8 id)
+                        const char *parent_name, u8 id, unsigned long flags)
 {
        struct clk_system *sys;
        struct clk_hw *hw;
@@ -123,7 +123,7 @@ at91_clk_register_system(struct regmap *regmap, const char *name,
        init.ops = &system_ops;
        init.parent_names = &parent_name;
        init.num_parents = 1;
-       init.flags = CLK_SET_RATE_PARENT;
+       init.flags = CLK_SET_RATE_PARENT | flags;
 
        sys->id = id;
        sys->hw.init = &init;

diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index 85a964c..97f67e2 100644 (file)
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -493,18 +493,28 @@ of_at91_clk_periph_setup(struct device_node *np, u8 type)
                                                          parent_name, id);
                } else {
                        struct clk_range range = CLK_RANGE(0, 0);
+                       unsigned long flags = 0;
 
                        of_at91_get_clk_range(periphclknp,
                                              "atmel,clk-output-range",
                                              &range);
 
+                       /*
+                        * mpddr_clk feed DDR controller and is enabled by
+                        * bootloader thus we need to keep it enabled in case
+                        * there is no Linux consumer for it.
+                        */
+                       if (!strcmp(periphclknp->name, "mpddr_clk"))
+                               flags = CLK_IS_CRITICAL;
+
                        hw = at91_clk_register_sam9x5_peripheral(regmap,
                                                                 &pmc_pcr_lock,
                                                                 &dt_pcr_layout,
                                                                 name,
                                                                 parent_name,
                                                                 id, &range,
-                                                                INT_MIN);
+                                                                INT_MIN,
+                                                                flags);
                }
 
                if (IS_ERR(hw))
@@ -879,6 +889,8 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
                return;
 
        for_each_child_of_node(np, sysclknp) {
+               unsigned long flags = 0;
+
                if (of_property_read_u32(sysclknp, "reg", &id))
                        continue;
 
@@ -887,7 +899,16 @@ static void __init of_at91rm9200_clk_sys_setup(struct device_node *np)
 
                parent_name = of_clk_get_parent_name(sysclknp, 0);
 
-               hw = at91_clk_register_system(regmap, name, parent_name, id);
+               /*
+                * 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.
+                */
+               if (!strcmp(sysclknp->name, "ddrck"))
+                       flags = CLK_IS_CRITICAL;
+
+               hw = at91_clk_register_system(regmap, name, parent_name, id,
+                                             flags);
                if (IS_ERR(hw))
                        continue;
 

diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index efe4975..1b3ca7d 100644 (file)
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -199,7 +199,7 @@ at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
                                    const struct clk_pcr_layout *layout,
                                    const char *name, const char *parent_name,
                                    u32 id, const struct clk_range *range,
-                                   int chg_pid);
+                                   int chg_pid, unsigned long flags);
 
 struct clk_hw * __init
 at91_clk_register_pll(struct regmap *regmap, const char *name,
@@ -242,7 +242,7 @@ at91sam9x5_clk_register_smd(struct regmap *regmap, const char *name,
 
 struct clk_hw * __init
 at91_clk_register_system(struct regmap *regmap, const char *name,
-                        const char *parent_name, u8 id);
+                        const char *parent_name, u8 id, unsigned long flags);
 
 struct clk_hw * __init
 at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,

diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
index 9ea4ce5..ac070db 100644 (file)
--- a/drivers/clk/at91/sam9x60.c
+++ b/drivers/clk/at91/sam9x60.c
@@ -75,9 +75,14 @@ static const struct clk_pcr_layout sam9x60_pcr_layout = {
 static const struct {
        char *n;
        char *p;
+       unsigned long flags;
        u8 id;
 } sam9x60_systemck[] = {
-       { .n = "ddrck",  .p = "masterck_div", .id = 2 },
+       /*
+        * 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 = "uhpck",  .p = "usbck",    .id = 6 },
        { .n = "pck0",   .p = "prog0",    .id = 8 },
        { .n = "pck1",   .p = "prog1",    .id = 9 },
@@ -86,6 +91,7 @@ static const struct {
 
 static const struct {
        char *n;
+       unsigned long flags;
        u8 id;
 } sam9x60_periphck[] = {
        { .n = "pioA_clk",   .id = 2, },
@@ -132,7 +138,11 @@ static const struct {
        { .n = "pioD_clk",   .id = 44, },
        { .n = "tcb1_clk",   .id = 45, },
        { .n = "dbgu_clk",   .id = 47, },
-       { .n = "mpddr_clk",  .id = 49, },
+       /*
+        * 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 = 49, .flags = CLK_IS_CRITICAL },
 };
 
 static const struct {
@@ -315,7 +325,8 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
                hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
                                              sam9x60_systemck[i].p,
-                                             sam9x60_systemck[i].id);
+                                             sam9x60_systemck[i].id,
+                                             sam9x60_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -328,7 +339,8 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
                                                         sam9x60_periphck[i].n,
                                                         "masterck_div",
                                                         sam9x60_periphck[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN,
+                                                        sam9x60_periphck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index 84156dc..c0e3e1a 100644 (file)
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -40,9 +40,14 @@ static const struct clk_pcr_layout sama5d2_pcr_layout = {
 static const struct {
        char *n;
        char *p;
+       unsigned long flags;
        u8 id;
 } sama5d2_systemck[] = {
-       { .n = "ddrck", .p = "masterck_div", .id = 2 },
+       /*
+        * 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 },
@@ -97,6 +102,7 @@ static const struct {
 
 static const struct {
        char *n;
+       unsigned long flags;
        u8 id;
 } sama5d2_periphck[] = {
        { .n = "dma0_clk",    .id = 6, },
@@ -104,7 +110,11 @@ static const struct {
        { .n = "aes_clk",     .id = 9, },
        { .n = "aesb_clk",    .id = 10, },
        { .n = "sha_clk",     .id = 12, },
-       { .n = "mpddr_clk",   .id = 13, },
+       /*
+        * 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 = 13, .flags = CLK_IS_CRITICAL },
        { .n = "matrix0_clk", .id = 15, },
        { .n = "sdmmc0_hclk", .id = 31, },
        { .n = "sdmmc1_hclk", .id = 32, },
@@ -302,7 +312,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) {
                hw = at91_clk_register_system(regmap, sama5d2_systemck[i].n,
                                              sama5d2_systemck[i].p,
-                                             sama5d2_systemck[i].id);
+                                             sama5d2_systemck[i].id,
+                                             sama5d2_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -315,7 +326,8 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
                                                         sama5d2_periphck[i].n,
                                                         "masterck_div",
                                                         sama5d2_periphck[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN,
+                                                        sama5d2_periphck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -329,7 +341,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
                                                         "h32mxck",
                                                         sama5d2_periph32ck[i].id,
                                                         &sama5d2_periph32ck[i].r,
-                                                        INT_MIN);
+                                                        INT_MIN, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/sama5d3.c b/drivers/clk/at91/sama5d3.c
index 7e93c6e..ad6068b 100644 (file)
--- a/drivers/clk/at91/sama5d3.c
+++ b/drivers/clk/at91/sama5d3.c
@@ -40,9 +40,14 @@ static const struct clk_pcr_layout sama5d3_pcr_layout = {
 static const struct {
        char *n;
        char *p;
+       unsigned long flags;
        u8 id;
 } sama5d3_systemck[] = {
-       { .n = "ddrck", .p = "masterck_div", .id = 2 },
+       /*
+        * 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 },
@@ -56,6 +61,7 @@ static const struct {
        char *n;
        u8 id;
        struct clk_range r;
+       unsigned long flags;
 } sama5d3_periphck[] = {
        { .n = "dbgu_clk", .id = 2, },
        { .n = "hsmc_clk", .id = 5, },
@@ -99,7 +105,11 @@ static const struct {
        { .n = "tdes_clk", .id = 44, },
        { .n = "trng_clk", .id = 45, },
        { .n = "fuse_clk", .id = 48, },
-       { .n = "mpddr_clk", .id = 49, },
+       /*
+        * 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 = 49, .flags = CLK_IS_CRITICAL },
 };
 
 static void __init sama5d3_pmc_setup(struct device_node *np)
@@ -222,7 +232,8 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) {
                hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n,
                                              sama5d3_systemck[i].p,
-                                             sama5d3_systemck[i].id);
+                                             sama5d3_systemck[i].id,
+                                             sama5d3_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -236,7 +247,8 @@ static void __init sama5d3_pmc_setup(struct device_node *np)
                                                         "masterck_div",
                                                         sama5d3_periphck[i].id,
                                                         &sama5d3_periphck[i].r,
-                                                        INT_MIN);
+                                                        INT_MIN,
+                                                        sama5d3_periphck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index 1a14a9b..e876ec9 100644 (file)
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -39,9 +39,14 @@ static const struct clk_pcr_layout sama5d4_pcr_layout = {
 static const struct {
        char *n;
        char *p;
+       unsigned long flags;
        u8 id;
 } sama5d4_systemck[] = {
-       { .n = "ddrck", .p = "masterck_div", .id = 2 },
+       /*
+        * 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 },
@@ -103,12 +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 },
@@ -245,7 +255,8 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
        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].id,
+                                             sama5d4_systemck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -258,7 +269,8 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
                                                         sama5d4_periphck[i].n,
                                                         "masterck_div",
                                                         sama5d4_periphck[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN,
+                                                        sama5d4_periphck[i].flags);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -271,7 +283,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
                                                         sama5d4_periph32ck[i].n,
                                                         "h32mxck",
                                                         sama5d4_periph32ck[i].id,
-                                                        &range, INT_MIN);
+                                                        &range, INT_MIN, 0);
                if (IS_ERR(hw))
                        goto err_free;
 

diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c
index 9a213ba..f135b66 100644 (file)
--- a/drivers/clk/at91/sama7g5.c
+++ b/drivers/clk/at91/sama7g5.c
@@ -1068,7 +1068,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
        for (i = 0; i < ARRAY_SIZE(sama7g5_systemck); i++) {
                hw = at91_clk_register_system(regmap, sama7g5_systemck[i].n,
                                              sama7g5_systemck[i].p,
-                                             sama7g5_systemck[i].id);
+                                             sama7g5_systemck[i].id, 0);
                if (IS_ERR(hw))
                        goto err_free;
 
@@ -1083,7 +1083,7 @@ static void __init sama7g5_pmc_setup(struct device_node *np)
                                                sama7g5_periphck[i].id,
                                                &sama7g5_periphck[i].r,
                                                sama7g5_periphck[i].chgp ? 0 :
-                                               INT_MIN);
+                                               INT_MIN, 0);
                if (IS_ERR(hw))
                        goto err_free;