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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
This commit is contained in:
Claudiu Beznea 2022-12-08 13:45:13 +02:00
parent 1b929c02af
commit 68b3b6f177
15 changed files with 131 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/clk/at91/at91rm9200.c
View File

@ -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;

2
drivers/clk/at91/at91sam9260.c
View File

@ -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;

10
drivers/clk/at91/at91sam9g45.c
View File

@ -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;

12
drivers/clk/at91/at91sam9n12.c
View File

@ -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;

2
drivers/clk/at91/at91sam9rl.c
View File

@ -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;

17
drivers/clk/at91/at91sam9x5.c
View File

@ -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;

8
drivers/clk/at91/clk-peripheral.c
View File

@ -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;
}

4
drivers/clk/at91/clk-system.c
View File

@ -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;

25
drivers/clk/at91/dt-compat.c
View File

@ -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;

4
drivers/clk/at91/pmc.h
View File

@ -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,

20
drivers/clk/at91/sam9x60.c
View File

@ -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;

22
drivers/clk/at91/sama5d2.c
View File

@ -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;

20
drivers/clk/at91/sama5d3.c
View File

@ -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;

22
drivers/clk/at91/sama5d4.c
View File

@ -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;

4
drivers/clk/at91/sama7g5.c
View File

@ -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;