* [PATCH 0/7] clk: at91: add sam9x60 pmc clock support
@ 2019-02-20 11:25 Alexandre Belloni
2019-02-20 11:25 ` [PATCH 1/7] clk: at91: allow configuring peripheral PCR layout Alexandre Belloni
` (6 more replies)
0 siblings, 7 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:25 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
This series add support for the sam9x60 clocks handled by the PMC.
The first four patches are preparatory patches to handle register layout
and offset differences. Then, a driver for the new interface for PLLs is
added and the final patch is the driver for the sam9x60 PMC.
Alexandre Belloni (7):
clk: at91: allow configuring peripheral PCR layout
clk: at91: allow configuring generated PCR layout
clk: at91: usb: Add sam9x60 support
clk: at91: master: Add sam9x60 support
clk: at91: add sam9x60 PLL driver
dt-bindings: clk: at91: add bindings for SAM9X60 pmc
clk: at91: add sam9x60 pmc driver
.../devicetree/bindings/clock/at91-clock.txt | 3 +-
drivers/clk/at91/Makefile | 2 +
drivers/clk/at91/at91sam9x5.c | 9 +
drivers/clk/at91/clk-generated.c | 48 +--
drivers/clk/at91/clk-master.c | 8 +-
drivers/clk/at91/clk-peripheral.c | 46 +--
drivers/clk/at91/clk-sam9x60-pll.c | 329 ++++++++++++++++++
drivers/clk/at91/clk-usb.c | 33 +-
drivers/clk/at91/dt-compat.c | 12 +-
drivers/clk/at91/pmc.h | 23 ++
drivers/clk/at91/sam9x60.c | 307 ++++++++++++++++
drivers/clk/at91/sama5d2.c | 10 +
drivers/clk/at91/sama5d4.c | 8 +
include/linux/clk/at91_pmc.h | 12 +-
14 files changed, 785 insertions(+), 65 deletions(-)
create mode 100644 drivers/clk/at91/clk-sam9x60-pll.c
create mode 100644 drivers/clk/at91/sam9x60.c
--
2.20.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH 1/7] clk: at91: allow configuring peripheral PCR layout
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
@ 2019-02-20 11:25 ` Alexandre Belloni
2019-02-20 11:26 ` [PATCH 2/7] clk: at91: allow configuring generated " Alexandre Belloni
` (5 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:25 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
The PCR register actually changed layout for each SoC. By chance, this
didn't have impact on sama5d[2-4] support but since sama5d3, PID is seven
bits wide and sama5d4 and sama5d2 don't have DIV.
For the DT backward compatibility, keep the layout as is.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/at91sam9x5.c | 9 ++++++
drivers/clk/at91/clk-peripheral.c | 46 ++++++++++++++++---------------
drivers/clk/at91/dt-compat.c | 9 ++++++
drivers/clk/at91/pmc.h | 12 ++++++++
drivers/clk/at91/sama5d2.c | 9 ++++++
drivers/clk/at91/sama5d4.c | 8 ++++++
include/linux/clk/at91_pmc.h | 3 --
7 files changed, 71 insertions(+), 25 deletions(-)
diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c
index 3487e03d4bc6..f5cfcbd85f10 100644
--- a/drivers/clk/at91/at91sam9x5.c
+++ b/drivers/clk/at91/at91sam9x5.c
@@ -49,6 +49,13 @@ static const struct {
{ .n = "pck1", .p = "prog1", .id = 9 },
};
+static const struct clk_pcr_layout at91sam9x5_pcr_layout = {
+ .offset = 0x10c,
+ .cmd = BIT(12),
+ .pid_mask = GENMASK(5, 0),
+ .div_mask = GENMASK(17, 16),
+};
+
struct pck {
char *n;
u8 id;
@@ -242,6 +249,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
for (i = 0; i < ARRAY_SIZE(at91sam9x5_periphck); i++) {
hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &at91sam9x5_pcr_layout,
at91sam9x5_periphck[i].n,
"masterck",
at91sam9x5_periphck[i].id,
@@ -254,6 +262,7 @@ static void __init at91sam9x5_pmc_setup(struct device_node *np,
for (i = 0; extra_pcks[i].id; i++) {
hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &at91sam9x5_pcr_layout,
extra_pcks[i].n,
"masterck",
extra_pcks[i].id,
diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c
index 65c1defa78e4..6b7748b9588a 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -8,6 +8,7 @@
*
*/
+#include <linux/bitops.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -23,9 +24,6 @@ DEFINE_SPINLOCK(pmc_pcr_lock);
#define PERIPHERAL_ID_MAX 31
#define PERIPHERAL_MASK(id) (1 << ((id) & PERIPHERAL_ID_MAX))
-#define PERIPHERAL_RSHIFT_MASK 0x3
-#define PERIPHERAL_RSHIFT(val) (((val) >> 16) & PERIPHERAL_RSHIFT_MASK)
-
#define PERIPHERAL_MAX_SHIFT 3
struct clk_peripheral {
@@ -43,6 +41,7 @@ struct clk_sam9x5_peripheral {
spinlock_t *lock;
u32 id;
u32 div;
+ const struct clk_pcr_layout *layout;
bool auto_div;
};
@@ -169,13 +168,13 @@ static int clk_sam9x5_peripheral_enable(struct clk_hw *hw)
return 0;
spin_lock_irqsave(periph->lock, flags);
- regmap_write(periph->regmap, AT91_PMC_PCR,
- (periph->id & AT91_PMC_PCR_PID_MASK));
- regmap_update_bits(periph->regmap, AT91_PMC_PCR,
- AT91_PMC_PCR_DIV_MASK | AT91_PMC_PCR_CMD |
+ regmap_write(periph->regmap, periph->layout->offset,
+ (periph->id & periph->layout->pid_mask));
+ regmap_update_bits(periph->regmap, periph->layout->offset,
+ periph->layout->div_mask | periph->layout->cmd |
AT91_PMC_PCR_EN,
- AT91_PMC_PCR_DIV(periph->div) |
- AT91_PMC_PCR_CMD |
+ field_prep(periph->layout->div_mask, periph->div) |
+ periph->layout->cmd |
AT91_PMC_PCR_EN);
spin_unlock_irqrestore(periph->lock, flags);
@@ -191,11 +190,11 @@ static void clk_sam9x5_peripheral_disable(struct clk_hw *hw)
return;
spin_lock_irqsave(periph->lock, flags);
- regmap_write(periph->regmap, AT91_PMC_PCR,
- (periph->id & AT91_PMC_PCR_PID_MASK));
- regmap_update_bits(periph->regmap, AT91_PMC_PCR,
- AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD,
- AT91_PMC_PCR_CMD);
+ regmap_write(periph->regmap, periph->layout->offset,
+ (periph->id & periph->layout->pid_mask));
+ regmap_update_bits(periph->regmap, periph->layout->offset,
+ AT91_PMC_PCR_EN | periph->layout->cmd,
+ periph->layout->cmd);
spin_unlock_irqrestore(periph->lock, flags);
}
@@ -209,9 +208,9 @@ static int clk_sam9x5_peripheral_is_enabled(struct clk_hw *hw)
return 1;
spin_lock_irqsave(periph->lock, flags);
- regmap_write(periph->regmap, AT91_PMC_PCR,
- (periph->id & AT91_PMC_PCR_PID_MASK));
- regmap_read(periph->regmap, AT91_PMC_PCR, &status);
+ regmap_write(periph->regmap, periph->layout->offset,
+ (periph->id & periph->layout->pid_mask));
+ regmap_read(periph->regmap, periph->layout->offset, &status);
spin_unlock_irqrestore(periph->lock, flags);
return status & AT91_PMC_PCR_EN ? 1 : 0;
@@ -229,13 +228,13 @@ clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw,
return parent_rate;
spin_lock_irqsave(periph->lock, flags);
- regmap_write(periph->regmap, AT91_PMC_PCR,
- (periph->id & AT91_PMC_PCR_PID_MASK));
- regmap_read(periph->regmap, AT91_PMC_PCR, &status);
+ regmap_write(periph->regmap, periph->layout->offset,
+ (periph->id & periph->layout->pid_mask));
+ regmap_read(periph->regmap, periph->layout->offset, &status);
spin_unlock_irqrestore(periph->lock, flags);
if (status & AT91_PMC_PCR_EN) {
- periph->div = PERIPHERAL_RSHIFT(status);
+ periph->div = field_get(periph->layout->div_mask, status);
periph->auto_div = false;
} else {
clk_sam9x5_peripheral_autodiv(periph);
@@ -328,6 +327,7 @@ static const struct clk_ops sam9x5_peripheral_ops = {
struct clk_hw * __init
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)
{
@@ -354,7 +354,9 @@ at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock,
periph->div = 0;
periph->regmap = regmap;
periph->lock = lock;
- periph->auto_div = true;
+ if (layout->div_mask)
+ periph->auto_div = true;
+ periph->layout = layout;
periph->range = *range;
hw = &periph->hw;
diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index b95bb4e2a927..aa09072f36db 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -93,6 +93,14 @@ CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_pmc_setup,
of_sama5d2_clk_audio_pll_pmc_setup);
#endif /* CONFIG_HAVE_AT91_AUDIO_PLL */
+static const struct clk_pcr_layout dt_pcr_layout = {
+ .offset = 0x10c,
+ .cmd = BIT(12),
+ .pid_mask = GENMASK(5, 0),
+ .div_mask = GENMASK(17, 16),
+ .gckcss_mask = GENMASK(10, 8),
+};
+
#ifdef CONFIG_HAVE_AT91_GENERATED_CLK
#define GENERATED_SOURCE_MAX 6
@@ -448,6 +456,7 @@ of_at91_clk_periph_setup(struct device_node *np, u8 type)
hw = at91_clk_register_sam9x5_peripheral(regmap,
&pmc_pcr_lock,
+ &dt_pcr_layout,
name,
parent_name,
id, &range);
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 672a79bda88c..616c04588093 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -80,6 +80,17 @@ extern const struct clk_programmable_layout at91rm9200_programmable_layout;
extern const struct clk_programmable_layout at91sam9g45_programmable_layout;
extern const struct clk_programmable_layout at91sam9x5_programmable_layout;
+struct clk_pcr_layout {
+ u32 offset;
+ u32 cmd;
+ u32 div_mask;
+ u32 gckcss_mask;
+ u32 pid_mask;
+};
+
+#define field_get(_mask, _reg) (((_reg) & (_mask)) >> (ffs(_mask) - 1))
+#define field_prep(_mask, _val) (((_val) << (ffs(_mask) - 1)) & (_mask))
+
#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,
@@ -143,6 +154,7 @@ at91_clk_register_peripheral(struct regmap *regmap, const char *name,
const char *parent_name, u32 id);
struct clk_hw * __init
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);
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index cd0ef7274fdb..f3f1ce2013d4 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -28,6 +28,13 @@ static const struct clk_pll_characteristics plla_characteristics = {
.out = plla_out,
};
+static const struct clk_pcr_layout sama5d2_pcr_layout = {
+ .offset = 0x10c,
+ .cmd = BIT(12),
+ .gckcss_mask = GENMASK(10, 8),
+ .pid_mask = GENMASK(6, 0),
+};
+
static const struct {
char *n;
char *p;
@@ -265,6 +272,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
for (i = 0; i < ARRAY_SIZE(sama5d2_periphck); i++) {
hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &sama5d2_pcr_layout,
sama5d2_periphck[i].n,
"masterck",
sama5d2_periphck[i].id,
@@ -277,6 +285,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
for (i = 0; i < ARRAY_SIZE(sama5d2_periph32ck); i++) {
hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &sama5d2_pcr_layout,
sama5d2_periph32ck[i].n,
"h32mxck",
sama5d2_periph32ck[i].id,
diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index b645a9d59cdb..840edca77821 100644
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -28,6 +28,12 @@ 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;
@@ -232,6 +238,7 @@ 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",
sama5d4_periphck[i].id,
@@ -244,6 +251,7 @@ 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",
sama5d4_periph32ck[i].id,
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 931ab05f771d..b97b8dcbffe6 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -191,9 +191,6 @@
#define AT91_PMC_PCR_GCKCSS_MASK (0x7 << AT91_PMC_PCR_GCKCSS_OFFSET)
#define AT91_PMC_PCR_GCKCSS(n) ((n) << AT91_PMC_PCR_GCKCSS_OFFSET) /* GCK Clock Source Selection */
#define AT91_PMC_PCR_CMD (0x1 << 12) /* Command (read=0, write=1) */
-#define AT91_PMC_PCR_DIV_OFFSET 16
-#define AT91_PMC_PCR_DIV_MASK (0x3 << AT91_PMC_PCR_DIV_OFFSET)
-#define AT91_PMC_PCR_DIV(n) ((n) << AT91_PMC_PCR_DIV_OFFSET) /* Divisor Value */
#define AT91_PMC_PCR_GCKDIV_OFFSET 20
#define AT91_PMC_PCR_GCKDIV_MASK (0xff << AT91_PMC_PCR_GCKDIV_OFFSET)
#define AT91_PMC_PCR_GCKDIV(n) ((n) << AT91_PMC_PCR_GCKDIV_OFFSET) /* Generated Clock Divisor Value */
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 2/7] clk: at91: allow configuring generated PCR layout
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
2019-02-20 11:25 ` [PATCH 1/7] clk: at91: allow configuring peripheral PCR layout Alexandre Belloni
@ 2019-02-20 11:26 ` Alexandre Belloni
2019-02-20 11:26 ` [PATCH 3/7] clk: at91: usb: Add sam9x60 support Alexandre Belloni
` (4 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:26 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
The PCR register layout for GCLKCSS is changing for the future SoCs, allow
configuring it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/clk-generated.c | 48 +++++++++++++++++---------------
drivers/clk/at91/dt-compat.c | 3 +-
drivers/clk/at91/pmc.h | 1 +
drivers/clk/at91/sama5d2.c | 1 +
include/linux/clk/at91_pmc.h | 7 +----
5 files changed, 30 insertions(+), 30 deletions(-)
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
index 66e7f7baf958..5f18847965c1 100644
--- a/drivers/clk/at91/clk-generated.c
+++ b/drivers/clk/at91/clk-generated.c
@@ -11,6 +11,7 @@
*
*/
+#include <linux/bitfield.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
@@ -31,6 +32,7 @@ struct clk_generated {
spinlock_t *lock;
u32 id;
u32 gckdiv;
+ const struct clk_pcr_layout *layout;
u8 parent_id;
bool audio_pll_allowed;
};
@@ -47,14 +49,14 @@ static int clk_generated_enable(struct clk_hw *hw)
__func__, gck->gckdiv, gck->parent_id);
spin_lock_irqsave(gck->lock, flags);
- regmap_write(gck->regmap, AT91_PMC_PCR,
- (gck->id & AT91_PMC_PCR_PID_MASK));
- regmap_update_bits(gck->regmap, AT91_PMC_PCR,
- AT91_PMC_PCR_GCKDIV_MASK | AT91_PMC_PCR_GCKCSS_MASK |
- AT91_PMC_PCR_CMD | AT91_PMC_PCR_GCKEN,
- AT91_PMC_PCR_GCKCSS(gck->parent_id) |
- AT91_PMC_PCR_CMD |
- AT91_PMC_PCR_GCKDIV(gck->gckdiv) |
+ regmap_write(gck->regmap, gck->layout->offset,
+ (gck->id & gck->layout->pid_mask));
+ regmap_update_bits(gck->regmap, gck->layout->offset,
+ AT91_PMC_PCR_GCKDIV_MASK | gck->layout->gckcss_mask |
+ gck->layout->cmd | AT91_PMC_PCR_GCKEN,
+ field_prep(gck->layout->gckcss_mask, gck->parent_id) |
+ gck->layout->cmd |
+ FIELD_PREP(AT91_PMC_PCR_GCKDIV_MASK, gck->gckdiv) |
AT91_PMC_PCR_GCKEN);
spin_unlock_irqrestore(gck->lock, flags);
return 0;
@@ -66,11 +68,11 @@ static void clk_generated_disable(struct clk_hw *hw)
unsigned long flags;
spin_lock_irqsave(gck->lock, flags);
- regmap_write(gck->regmap, AT91_PMC_PCR,
- (gck->id & AT91_PMC_PCR_PID_MASK));
- regmap_update_bits(gck->regmap, AT91_PMC_PCR,
- AT91_PMC_PCR_CMD | AT91_PMC_PCR_GCKEN,
- AT91_PMC_PCR_CMD);
+ regmap_write(gck->regmap, gck->layout->offset,
+ (gck->id & gck->layout->pid_mask));
+ regmap_update_bits(gck->regmap, gck->layout->offset,
+ gck->layout->cmd | AT91_PMC_PCR_GCKEN,
+ gck->layout->cmd);
spin_unlock_irqrestore(gck->lock, flags);
}
@@ -81,9 +83,9 @@ static int clk_generated_is_enabled(struct clk_hw *hw)
unsigned int status;
spin_lock_irqsave(gck->lock, flags);
- regmap_write(gck->regmap, AT91_PMC_PCR,
- (gck->id & AT91_PMC_PCR_PID_MASK));
- regmap_read(gck->regmap, AT91_PMC_PCR, &status);
+ regmap_write(gck->regmap, gck->layout->offset,
+ (gck->id & gck->layout->pid_mask));
+ regmap_read(gck->regmap, gck->layout->offset, &status);
spin_unlock_irqrestore(gck->lock, flags);
return status & AT91_PMC_PCR_GCKEN ? 1 : 0;
@@ -259,19 +261,18 @@ static void clk_generated_startup(struct clk_generated *gck)
unsigned long flags;
spin_lock_irqsave(gck->lock, flags);
- regmap_write(gck->regmap, AT91_PMC_PCR,
- (gck->id & AT91_PMC_PCR_PID_MASK));
- regmap_read(gck->regmap, AT91_PMC_PCR, &tmp);
+ regmap_write(gck->regmap, gck->layout->offset,
+ (gck->id & gck->layout->pid_mask));
+ regmap_read(gck->regmap, gck->layout->offset, &tmp);
spin_unlock_irqrestore(gck->lock, flags);
- gck->parent_id = (tmp & AT91_PMC_PCR_GCKCSS_MASK)
- >> AT91_PMC_PCR_GCKCSS_OFFSET;
- gck->gckdiv = (tmp & AT91_PMC_PCR_GCKDIV_MASK)
- >> AT91_PMC_PCR_GCKDIV_OFFSET;
+ gck->parent_id = field_get(gck->layout->gckcss_mask, tmp);
+ gck->gckdiv = FIELD_GET(AT91_PMC_PCR_GCKDIV_MASK, tmp);
}
struct clk_hw * __init
at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock,
+ const struct clk_pcr_layout *layout,
const char *name, const char **parent_names,
u8 num_parents, u8 id, bool pll_audio,
const struct clk_range *range)
@@ -298,6 +299,7 @@ at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock,
gck->lock = lock;
gck->range = *range;
gck->audio_pll_allowed = pll_audio;
+ gck->layout = layout;
clk_generated_startup(gck);
hw = &gck->hw;
diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index aa09072f36db..aa1754eac59f 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -154,7 +154,8 @@ static void __init of_sama5d2_clk_generated_setup(struct device_node *np)
id == GCK_ID_CLASSD))
pll_audio = true;
- hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, name,
+ hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
+ &dt_pcr_layout, name,
parent_names, num_parents,
id, pll_audio, &range);
if (IS_ERR(hw))
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 616c04588093..4027306b904c 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -116,6 +116,7 @@ at91_clk_register_audio_pll_pmc(struct regmap *regmap, const char *name,
struct clk_hw * __init
at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock,
+ const struct clk_pcr_layout *layout,
const char *name, const char **parent_names,
u8 num_parents, u8 id, bool pll_audio,
const struct clk_range *range);
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index f3f1ce2013d4..8f301a517b9d 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -304,6 +304,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
parent_names[5] = "audiopll_pmcck";
for (i = 0; i < ARRAY_SIZE(sama5d2_gck); i++) {
hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
+ &sama5d2_pcr_layout,
sama5d2_gck[i].n,
parent_names, 6,
sama5d2_gck[i].id,
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index b97b8dcbffe6..31f00ebf1315 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -187,13 +187,8 @@
#define AT91_PMC_PCR 0x10c /* Peripheral Control Register [some SAM9 and SAMA5] */
#define AT91_PMC_PCR_PID_MASK 0x3f
-#define AT91_PMC_PCR_GCKCSS_OFFSET 8
-#define AT91_PMC_PCR_GCKCSS_MASK (0x7 << AT91_PMC_PCR_GCKCSS_OFFSET)
-#define AT91_PMC_PCR_GCKCSS(n) ((n) << AT91_PMC_PCR_GCKCSS_OFFSET) /* GCK Clock Source Selection */
#define AT91_PMC_PCR_CMD (0x1 << 12) /* Command (read=0, write=1) */
-#define AT91_PMC_PCR_GCKDIV_OFFSET 20
-#define AT91_PMC_PCR_GCKDIV_MASK (0xff << AT91_PMC_PCR_GCKDIV_OFFSET)
-#define AT91_PMC_PCR_GCKDIV(n) ((n) << AT91_PMC_PCR_GCKDIV_OFFSET) /* Generated Clock Divisor Value */
+#define AT91_PMC_PCR_GCKDIV_MASK GENMASK(27, 20)
#define AT91_PMC_PCR_EN (0x1 << 28) /* Enable */
#define AT91_PMC_PCR_GCKEN (0x1 << 29) /* GCK Enable */
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 3/7] clk: at91: usb: Add sam9x60 support
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
2019-02-20 11:25 ` [PATCH 1/7] clk: at91: allow configuring peripheral PCR layout Alexandre Belloni
2019-02-20 11:26 ` [PATCH 2/7] clk: at91: allow configuring generated " Alexandre Belloni
@ 2019-02-20 11:26 ` Alexandre Belloni
2019-02-20 11:26 ` [PATCH 4/7] clk: at91: master: " Alexandre Belloni
` (3 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:26 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
The sam9x60 USB clock supports four different parents, ensure they can be
selected.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/clk-usb.c | 33 +++++++++++++++++++++++++++------
drivers/clk/at91/pmc.h | 3 +++
2 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index 79ee1c760f2a..ebc37ee33518 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -23,9 +23,13 @@
#define RM9200_USB_DIV_SHIFT 28
#define RM9200_USB_DIV_TAB_SIZE 4
+#define SAM9X5_USBS_MASK GENMASK(0, 0)
+#define SAM9X60_USBS_MASK GENMASK(1, 0)
+
struct at91sam9x5_clk_usb {
struct clk_hw hw;
struct regmap *regmap;
+ u32 usbs_mask;
};
#define to_at91sam9x5_clk_usb(hw) \
@@ -111,8 +115,7 @@ static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
if (index > 1)
return -EINVAL;
- regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS,
- index ? AT91_PMC_USBS : 0);
+ regmap_update_bits(usb->regmap, AT91_PMC_USB, usb->usbs_mask, index);
return 0;
}
@@ -124,7 +127,7 @@ static u8 at91sam9x5_clk_usb_get_parent(struct clk_hw *hw)
regmap_read(usb->regmap, AT91_PMC_USB, &usbr);
- return usbr & AT91_PMC_USBS;
+ return usbr & usb->usbs_mask;
}
static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -190,9 +193,10 @@ static const struct clk_ops at91sam9n12_usb_ops = {
.set_rate = at91sam9x5_clk_usb_set_rate,
};
-struct clk_hw * __init
-at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
- const char **parent_names, u8 num_parents)
+static struct clk_hw * __init
+_at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
+ const char **parent_names, u8 num_parents,
+ u32 usbs_mask)
{
struct at91sam9x5_clk_usb *usb;
struct clk_hw *hw;
@@ -212,6 +216,7 @@ at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
usb->hw.init = &init;
usb->regmap = regmap;
+ usb->usbs_mask = SAM9X5_USBS_MASK;
hw = &usb->hw;
ret = clk_hw_register(NULL, &usb->hw);
@@ -223,6 +228,22 @@ at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
return hw;
}
+struct clk_hw * __init
+at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
+ const char **parent_names, u8 num_parents)
+{
+ return _at91sam9x5_clk_register_usb(regmap, name, parent_names,
+ num_parents, SAM9X5_USBS_MASK);
+}
+
+struct clk_hw * __init
+sam9x60_clk_register_usb(struct regmap *regmap, const char *name,
+ const char **parent_names, u8 num_parents)
+{
+ return _at91sam9x5_clk_register_usb(regmap, name, parent_names,
+ num_parents, SAM9X60_USBS_MASK);
+}
+
struct clk_hw * __init
at91sam9n12_clk_register_usb(struct regmap *regmap, const char *name,
const char *parent_name)
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 4027306b904c..44345e4ab1c9 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -194,6 +194,9 @@ struct clk_hw * __init
at91sam9n12_clk_register_usb(struct regmap *regmap, const char *name,
const char *parent_name);
struct clk_hw * __init
+sam9x60_clk_register_usb(struct regmap *regmap, const char *name,
+ const char **parent_names, u8 num_parents);
+struct clk_hw * __init
at91rm9200_clk_register_usb(struct regmap *regmap, const char *name,
const char *parent_name, const u32 *divisors);
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 4/7] clk: at91: master: Add sam9x60 support
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
` (2 preceding siblings ...)
2019-02-20 11:26 ` [PATCH 3/7] clk: at91: usb: Add sam9x60 support Alexandre Belloni
@ 2019-02-20 11:26 ` Alexandre Belloni
2019-02-20 11:26 ` [PATCH 5/7] clk: at91: add sam9x60 PLL driver Alexandre Belloni
` (2 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:26 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
The sam9x60 cpu clock is located at a different offset but is otherwise
similar to the master clock.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/clk-master.c | 8 +++++---
drivers/clk/at91/pmc.h | 1 +
include/linux/clk/at91_pmc.h | 2 ++
3 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c
index eb53b4a8fab6..12b5bf4cc7bb 100644
--- a/drivers/clk/at91/clk-master.c
+++ b/drivers/clk/at91/clk-master.c
@@ -29,6 +29,7 @@ struct clk_master {
struct regmap *regmap;
const struct clk_master_layout *layout;
const struct clk_master_characteristics *characteristics;
+ u32 mckr;
};
static inline bool clk_master_ready(struct regmap *regmap)
@@ -69,7 +70,7 @@ static unsigned long clk_master_recalc_rate(struct clk_hw *hw,
master->characteristics;
unsigned int mckr;
- regmap_read(master->regmap, AT91_PMC_MCKR, &mckr);
+ regmap_read(master->regmap, master->layout->offset, &mckr);
mckr &= layout->mask;
pres = (mckr >> layout->pres_shift) & MASTER_PRES_MASK;
@@ -95,7 +96,7 @@ static u8 clk_master_get_parent(struct clk_hw *hw)
struct clk_master *master = to_clk_master(hw);
unsigned int mckr;
- regmap_read(master->regmap, AT91_PMC_MCKR, &mckr);
+ regmap_read(master->regmap, master->layout->offset, &mckr);
return mckr & AT91_PMC_CSS;
}
@@ -147,13 +148,14 @@ at91_clk_register_master(struct regmap *regmap,
return hw;
}
-
const struct clk_master_layout at91rm9200_master_layout = {
.mask = 0x31F,
.pres_shift = 2,
+ .offset = AT91_PMC_MCKR,
};
const struct clk_master_layout at91sam9x5_master_layout = {
.mask = 0x373,
.pres_shift = 4,
+ .offset = AT91_PMC_MCKR,
};
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 44345e4ab1c9..4a30c20f17f1 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -38,6 +38,7 @@ struct clk_range {
#define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
struct clk_master_layout {
+ u32 offset;
u32 mask;
u8 pres_shift;
};
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index 31f00ebf1315..0c53f26ae3d3 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -74,6 +74,8 @@
#define AT91_PMC_USBDIV_4 (2 << 28)
#define AT91_PMC_USB96M (1 << 28) /* Divider by 2 Enable (PLLB only) */
+#define AT91_PMC_CPU_CKR 0x28 /* CPU Clock Register */
+
#define AT91_PMC_MCKR 0x30 /* Master Clock Register */
#define AT91_PMC_CSS (3 << 0) /* Master Clock Selection */
#define AT91_PMC_CSS_SLOW (0 << 0)
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 5/7] clk: at91: add sam9x60 PLL driver
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
` (3 preceding siblings ...)
2019-02-20 11:26 ` [PATCH 4/7] clk: at91: master: " Alexandre Belloni
@ 2019-02-20 11:26 ` Alexandre Belloni
2019-02-20 11:26 ` [PATCH 6/7] dt-bindings: clk: at91: add bindings for SAM9X60 pmc Alexandre Belloni
2019-02-20 11:26 ` [PATCH 7/7] clk: at91: add sam9x60 pmc driver Alexandre Belloni
6 siblings, 0 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:26 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
The PLLs on the sam9x60 (PLLA and USB PLL) use a different register set and
programming model than the previous SoCs.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/Makefile | 1 +
drivers/clk/at91/clk-sam9x60-pll.c | 329 +++++++++++++++++++++++++++++
drivers/clk/at91/pmc.h | 6 +
3 files changed, 336 insertions(+)
create mode 100644 drivers/clk/at91/clk-sam9x60-pll.c
diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile
index c75df1cad60e..0a30fc8dfcb0 100644
--- a/drivers/clk/at91/Makefile
+++ b/drivers/clk/at91/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_HAVE_AT91_SMD) += clk-smd.o
obj-$(CONFIG_HAVE_AT91_H32MX) += clk-h32mx.o
obj-$(CONFIG_HAVE_AT91_GENERATED_CLK) += clk-generated.o
obj-$(CONFIG_HAVE_AT91_I2S_MUX_CLK) += clk-i2s-mux.o
+obj-$(CONFIG_HAVE_AT91_SAM9X60_PLL) += clk-sam9x60-pll.o
obj-$(CONFIG_SOC_AT91SAM9) += at91sam9260.o at91sam9rl.o at91sam9x5.o
obj-$(CONFIG_SOC_SAMA5D4) += sama5d4.o
obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o
diff --git a/drivers/clk/at91/clk-sam9x60-pll.c b/drivers/clk/at91/clk-sam9x60-pll.c
new file mode 100644
index 000000000000..a3d5c729e8b6
--- /dev/null
+++ b/drivers/clk/at91/clk-sam9x60-pll.c
@@ -0,0 +1,329 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Microchip Technology Inc.
+ *
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/clk/at91_pmc.h>
+#include <linux/of.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#include "pmc.h"
+
+#define PMC_PLL_CTRL0 0xc
+#define PMC_PLL_CTRL0_DIV_MSK GENMASK(7, 0)
+#define PMC_PLL_CTRL0_ENPLL BIT(28)
+#define PMC_PLL_CTRL0_ENPLLCK BIT(29)
+#define PMC_PLL_CTRL0_ENLOCK BIT(31)
+
+#define PMC_PLL_CTRL1 0x10
+#define PMC_PLL_CTRL1_FRACR_MSK GENMASK(21, 0)
+#define PMC_PLL_CTRL1_MUL_MSK GENMASK(30, 24)
+
+#define PMC_PLL_ACR 0x18
+#define PMC_PLL_ACR_UTMIVR BIT(12)
+#define PMC_PLL_ACR_UTMIBG BIT(13)
+#define PMC_PLL_ACR_LOOP_FILTER_MSK GENMASK(31, 24)
+
+#define PMC_PLL_UPDT 0x1c
+#define PMC_PLL_UPDT_UPDATE BIT(8)
+
+#define PMC_PLL_ISR0 0xec
+
+#define PLL_DIV_MAX (FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, UINT_MAX) + 1)
+#define UPLL_DIV 2
+#define PLL_MUL_MAX (FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, UINT_MAX) + 1)
+
+#define PLL_MAX_ID 1
+
+struct sam9x60_pll {
+ struct clk_hw hw;
+ struct regmap *regmap;
+ spinlock_t *lock;
+ const struct clk_pll_characteristics *characteristics;
+ u32 frac;
+ u8 id;
+ u8 div;
+ u16 mul;
+};
+
+#define to_sam9x60_pll(hw) container_of(hw, struct sam9x60_pll, hw)
+
+static inline bool sam9x60_pll_ready(struct regmap *regmap, int id)
+{
+ unsigned int status;
+
+ regmap_read(regmap, PMC_PLL_ISR0, &status);
+
+ return !!(status & BIT(id));
+}
+
+static int sam9x60_pll_prepare(struct clk_hw *hw)
+{
+ struct sam9x60_pll *pll = to_sam9x60_pll(hw);
+ struct regmap *regmap = pll->regmap;
+ unsigned long flags;
+ u8 div;
+ u16 mul;
+ u32 val;
+
+ spin_lock_irqsave(pll->lock, flags);
+ regmap_write(regmap, PMC_PLL_UPDT, pll->id);
+
+ regmap_read(regmap, PMC_PLL_CTRL0, &val);
+ div = FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, val);
+
+ regmap_read(regmap, PMC_PLL_CTRL1, &val);
+ mul = FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, val);
+
+ if (sam9x60_pll_ready(regmap, pll->id) &&
+ (div == pll->div && mul == pll->mul)) {
+ spin_unlock_irqrestore(pll->lock, flags);
+ return 0;
+ }
+
+ /* Recommended value for PMC_PLL_ACR.LOOP_FILTER is 0x9 */
+ regmap_update_bits(regmap, PMC_PLL_ACR,
+ PMC_PLL_ACR_LOOP_FILTER_MSK, 0x9);
+
+ regmap_write(regmap, PMC_PLL_CTRL1,
+ FIELD_PREP(PMC_PLL_CTRL1_MUL_MSK, pll->mul));
+
+ if (pll->characteristics->upll) {
+ /* Enable the UTMI internal bandgap */
+ regmap_update_bits(regmap, PMC_PLL_ACR,
+ PMC_PLL_ACR_UTMIBG, PMC_PLL_ACR_UTMIBG);
+
+ udelay(10);
+
+ /* Enable the UTMI internal regulator */
+ regmap_update_bits(regmap, PMC_PLL_ACR,
+ PMC_PLL_ACR_UTMIVR, PMC_PLL_ACR_UTMIVR);
+
+ udelay(10);
+ }
+
+ regmap_update_bits(regmap, PMC_PLL_UPDT,
+ PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+
+ regmap_write(regmap, PMC_PLL_CTRL0,
+ PMC_PLL_CTRL0_ENLOCK | PMC_PLL_CTRL0_ENPLL |
+ PMC_PLL_CTRL0_ENPLLCK | pll->div);
+
+ regmap_update_bits(regmap, PMC_PLL_UPDT,
+ PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+
+ while (!sam9x60_pll_ready(regmap, pll->id))
+ cpu_relax();
+
+ spin_unlock_irqrestore(pll->lock, flags);
+
+ return 0;
+}
+
+static int sam9x60_pll_is_prepared(struct clk_hw *hw)
+{
+ struct sam9x60_pll *pll = to_sam9x60_pll(hw);
+
+ return sam9x60_pll_ready(pll->regmap, pll->id);
+}
+
+static void sam9x60_pll_unprepare(struct clk_hw *hw)
+{
+ struct sam9x60_pll *pll = to_sam9x60_pll(hw);
+ unsigned long flags;
+
+ spin_lock_irqsave(pll->lock, flags);
+
+ regmap_write(pll->regmap, PMC_PLL_UPDT, pll->id);
+
+ regmap_update_bits(pll->regmap, PMC_PLL_CTRL0,
+ PMC_PLL_CTRL0_ENPLLCK, 0);
+
+ regmap_update_bits(pll->regmap, PMC_PLL_UPDT,
+ PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+
+ regmap_update_bits(pll->regmap, PMC_PLL_CTRL0, PMC_PLL_CTRL0_ENPLL, 0);
+
+ if (pll->characteristics->upll)
+ regmap_update_bits(pll->regmap, PMC_PLL_ACR,
+ PMC_PLL_ACR_UTMIBG | PMC_PLL_ACR_UTMIVR, 0);
+
+ regmap_update_bits(pll->regmap, PMC_PLL_UPDT,
+ PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+
+ spin_unlock_irqrestore(pll->lock, flags);
+}
+
+static unsigned long sam9x60_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sam9x60_pll *pll = to_sam9x60_pll(hw);
+
+ return (parent_rate * (pll->mul + 1)) / (pll->div + 1);
+}
+
+static long sam9x60_pll_get_best_div_mul(struct sam9x60_pll *pll,
+ unsigned long rate,
+ unsigned long parent_rate,
+ bool update)
+{
+ const struct clk_pll_characteristics *characteristics =
+ pll->characteristics;
+ unsigned long bestremainder = ULONG_MAX;
+ unsigned long maxdiv, mindiv, tmpdiv;
+ long bestrate = -ERANGE;
+ unsigned long bestdiv = 0;
+ unsigned long bestmul = 0;
+ unsigned long bestfrac = 0;
+
+ if (rate < characteristics->output[0].min ||
+ rate > characteristics->output[0].max)
+ return -ERANGE;
+
+ if (!pll->characteristics->upll) {
+ mindiv = parent_rate / rate;
+ if (mindiv < 2)
+ mindiv = 2;
+
+ maxdiv = DIV_ROUND_UP(parent_rate * PLL_MUL_MAX, rate);
+ if (maxdiv > PLL_DIV_MAX)
+ maxdiv = PLL_DIV_MAX;
+ } else {
+ mindiv = maxdiv = UPLL_DIV;
+ }
+
+ for (tmpdiv = mindiv; tmpdiv <= maxdiv; tmpdiv++) {
+ unsigned long remainder;
+ unsigned long tmprate;
+ unsigned long tmpmul;
+ unsigned long tmpfrac = 0;
+
+ /*
+ * Calculate the multiplier associated with the current
+ * divider that provide the closest rate to the requested one.
+ */
+ tmpmul = mult_frac(rate, tmpdiv, parent_rate);
+ tmprate = mult_frac(parent_rate, tmpmul, tmpdiv);
+ remainder = rate - tmprate;
+
+ if (remainder) {
+ tmpfrac = DIV_ROUND_CLOSEST_ULL((u64)remainder * tmpdiv * (1 << 22),
+ parent_rate);
+
+ tmprate += DIV_ROUND_CLOSEST_ULL((u64)tmpfrac * parent_rate,
+ tmpdiv * (1 << 22));
+
+ if (tmprate > rate)
+ remainder = tmprate - rate;
+ else
+ remainder = rate - tmprate;
+ }
+
+ /*
+ * Compare the remainder with the best remainder found until
+ * now and elect a new best multiplier/divider pair if the
+ * current remainder is smaller than the best one.
+ */
+ if (remainder < bestremainder) {
+ bestremainder = remainder;
+ bestdiv = tmpdiv;
+ bestmul = tmpmul;
+ bestrate = tmprate;
+ bestfrac = tmpfrac;
+ }
+
+ /* We've found a perfect match! */
+ if (!remainder)
+ break;
+ }
+
+ /* Check if bestrate is a valid output rate */
+ if (bestrate < characteristics->output[0].min &&
+ bestrate > characteristics->output[0].max)
+ return -ERANGE;
+
+ if (update) {
+ pll->div = bestdiv - 1;
+ pll->mul = bestmul - 1;
+ pll->frac = bestfrac;
+ }
+
+ return bestrate;
+}
+
+static long sam9x60_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct sam9x60_pll *pll = to_sam9x60_pll(hw);
+
+ return sam9x60_pll_get_best_div_mul(pll, rate, *parent_rate, false);
+}
+
+static int sam9x60_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sam9x60_pll *pll = to_sam9x60_pll(hw);
+
+ return sam9x60_pll_get_best_div_mul(pll, rate, parent_rate, true);
+}
+
+static const struct clk_ops pll_ops = {
+ .prepare = sam9x60_pll_prepare,
+ .unprepare = sam9x60_pll_unprepare,
+ .is_prepared = sam9x60_pll_is_prepared,
+ .recalc_rate = sam9x60_pll_recalc_rate,
+ .round_rate = sam9x60_pll_round_rate,
+ .set_rate = sam9x60_pll_set_rate,
+};
+
+struct clk_hw * __init
+sam9x60_clk_register_pll(struct regmap *regmap, spinlock_t *lock,
+ const char *name, const char *parent_name, u8 id,
+ const struct clk_pll_characteristics *characteristics)
+{
+ struct sam9x60_pll *pll;
+ struct clk_hw *hw;
+ struct clk_init_data init;
+ unsigned int pllr;
+ int ret;
+
+ if (id > PLL_MAX_ID)
+ return ERR_PTR(-EINVAL);
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &pll_ops;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+ init.flags = CLK_SET_RATE_GATE;
+
+ pll->id = id;
+ pll->hw.init = &init;
+ pll->characteristics = characteristics;
+ pll->regmap = regmap;
+ pll->lock = lock;
+
+ regmap_write(regmap, PMC_PLL_UPDT, id);
+ regmap_read(regmap, PMC_PLL_CTRL0, &pllr);
+ pll->div = FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, pllr);
+ regmap_read(regmap, PMC_PLL_CTRL1, &pllr);
+ pll->mul = FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, pllr);
+
+ hw = &pll->hw;
+ ret = clk_hw_register(NULL, hw);
+ if (ret) {
+ kfree(pll);
+ hw = ERR_PTR(ret);
+ }
+
+ return hw;
+}
+
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 4a30c20f17f1..fb9e9c4cdc8d 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -69,6 +69,7 @@ struct clk_pll_characteristics {
struct clk_range *output;
u16 *icpll;
u8 *out;
+ u8 upll : 1;
};
struct clk_programmable_layout {
@@ -169,6 +170,11 @@ struct clk_hw * __init
at91_clk_register_plldiv(struct regmap *regmap, const char *name,
const char *parent_name);
+struct clk_hw * __init
+sam9x60_clk_register_pll(struct regmap *regmap, spinlock_t *lock,
+ const char *name, const char *parent_name, u8 id,
+ const struct clk_pll_characteristics *characteristics);
+
struct clk_hw * __init
at91_clk_register_programmable(struct regmap *regmap, const char *name,
const char **parent_names, u8 num_parents, u8 id,
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 6/7] dt-bindings: clk: at91: add bindings for SAM9X60 pmc
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
` (4 preceding siblings ...)
2019-02-20 11:26 ` [PATCH 5/7] clk: at91: add sam9x60 PLL driver Alexandre Belloni
@ 2019-02-20 11:26 ` Alexandre Belloni
2019-03-25 22:03 ` Rob Herring
2019-02-20 11:26 ` [PATCH 7/7] clk: at91: add sam9x60 pmc driver Alexandre Belloni
6 siblings, 1 reply; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:26 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni,
Rob Herring
Add SAM9X60 PMC compatible string.
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
Documentation/devicetree/bindings/clock/at91-clock.txt | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/clock/at91-clock.txt b/Documentation/devicetree/bindings/clock/at91-clock.txt
index ce1d21102428..e0e4fa67716f 100644
--- a/Documentation/devicetree/bindings/clock/at91-clock.txt
+++ b/Documentation/devicetree/bindings/clock/at91-clock.txt
@@ -37,7 +37,8 @@ For example:
Power Management Controller (PMC):
Required properties:
-- compatible : shall be "atmel,<chip>-pmc", "syscon":
+- compatible : shall be "atmel,<chip>-pmc", "syscon" or
+ "microchip,sam9x60-pmc"
<chip> can be: at91rm9200, at91sam9260, at91sam9261,
at91sam9263, at91sam9g45, at91sam9n12, at91sam9rl, at91sam9g15,
at91sam9g25, at91sam9g35, at91sam9x25, at91sam9x35, at91sam9x5,
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH 7/7] clk: at91: add sam9x60 pmc driver
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
` (5 preceding siblings ...)
2019-02-20 11:26 ` [PATCH 6/7] dt-bindings: clk: at91: add bindings for SAM9X60 pmc Alexandre Belloni
@ 2019-02-20 11:26 ` Alexandre Belloni
6 siblings, 0 replies; 9+ messages in thread
From: Alexandre Belloni @ 2019-02-20 11:26 UTC (permalink / raw)
To: Stephen Boyd
Cc: Nicolas Ferre, Claudiu Beznea, Michael Turquette, linux-clk,
devicetree, linux-arm-kernel, linux-kernel, Alexandre Belloni
Add a driver for the PMC clocks of the sam9c60.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/Makefile | 1 +
drivers/clk/at91/sam9x60.c | 307 +++++++++++++++++++++++++++++++++++++
2 files changed, 308 insertions(+)
create mode 100644 drivers/clk/at91/sam9x60.c
diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile
index 0a30fc8dfcb0..3732241352ce 100644
--- a/drivers/clk/at91/Makefile
+++ b/drivers/clk/at91/Makefile
@@ -16,5 +16,6 @@ obj-$(CONFIG_HAVE_AT91_GENERATED_CLK) += clk-generated.o
obj-$(CONFIG_HAVE_AT91_I2S_MUX_CLK) += clk-i2s-mux.o
obj-$(CONFIG_HAVE_AT91_SAM9X60_PLL) += clk-sam9x60-pll.o
obj-$(CONFIG_SOC_AT91SAM9) += at91sam9260.o at91sam9rl.o at91sam9x5.o
+obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o
obj-$(CONFIG_SOC_SAMA5D4) += sama5d4.o
obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o
diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
new file mode 100644
index 000000000000..22bf51c55bdc
--- /dev/null
+++ b/drivers/clk/at91/sam9x60.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/clock/at91.h>
+
+#include "pmc.h"
+
+DEFINE_SPINLOCK(pmc_pll_lock);
+
+static const struct clk_master_characteristics mck_characteristics = {
+ .output = { .min = 140000000, .max = 200000000 },
+ .divisors = { 1, 2, 4, 3 },
+ .have_div3_pres = 1,
+};
+
+static const struct clk_master_layout sam9x60_master_layout = {
+ .mask = 0x373,
+ .pres_shift = 4,
+ .offset = 0x28,
+};
+
+static struct clk_range plla_outputs[] = {
+ { .min = 300000000, .max = 600000000 },
+};
+
+static const struct clk_pll_characteristics plla_characteristics = {
+ .input = { .min = 12000000, .max = 48000000 },
+ .num_output = ARRAY_SIZE(plla_outputs),
+ .output = plla_outputs,
+};
+
+static struct clk_range upll_outputs[] = {
+ { .min = 300000000, .max = 500000000 },
+};
+
+static const struct clk_pll_characteristics upll_characteristics = {
+ .input = { .min = 12000000, .max = 48000000 },
+ .num_output = ARRAY_SIZE(upll_outputs),
+ .output = upll_outputs,
+ .upll = true,
+};
+
+static const struct clk_programmable_layout sam9x60_programmable_layout = {
+ .pres_shift = 8,
+ .css_mask = 0x1f,
+ .have_slck_mck = 0,
+};
+
+static const struct clk_pcr_layout sam9x60_pcr_layout = {
+ .offset = 0x88,
+ .cmd = BIT(31),
+ .gckcss_mask = GENMASK(12, 8),
+ .pid_mask = GENMASK(6, 0),
+};
+
+static const struct {
+ char *n;
+ char *p;
+ u8 id;
+} sam9x60_systemck[] = {
+ { .n = "ddrck", .p = "masterck", .id = 2 },
+ { .n = "uhpck", .p = "usbck", .id = 6 },
+ { .n = "pck0", .p = "prog0", .id = 8 },
+ { .n = "pck1", .p = "prog1", .id = 9 },
+ { .n = "qspick", .p = "masterck", .id = 19 },
+};
+
+static const struct {
+ char *n;
+ u8 id;
+} sam9x60_periphck[] = {
+ { .n = "pioA_clk", .id = 2, },
+ { .n = "pioB_clk", .id = 3, },
+ { .n = "pioC_clk", .id = 4, },
+ { .n = "flex0_clk", .id = 5, },
+ { .n = "flex1_clk", .id = 6, },
+ { .n = "flex2_clk", .id = 7, },
+ { .n = "flex3_clk", .id = 8, },
+ { .n = "flex6_clk", .id = 9, },
+ { .n = "flex7_clk", .id = 10, },
+ { .n = "flex8_clk", .id = 11, },
+ { .n = "sdmmc0_clk", .id = 12, },
+ { .n = "flex4_clk", .id = 13, },
+ { .n = "flex5_clk", .id = 14, },
+ { .n = "flex9_clk", .id = 15, },
+ { .n = "flex10_clk", .id = 16, },
+ { .n = "tcb0_clk", .id = 17, },
+ { .n = "pwm_clk", .id = 18, },
+ { .n = "adc_clk", .id = 19, },
+ { .n = "dma0_clk", .id = 20, },
+ { .n = "matrix_clk", .id = 21, },
+ { .n = "uhphs_clk", .id = 22, },
+ { .n = "udphs_clk", .id = 23, },
+ { .n = "macb0_clk", .id = 24, },
+ { .n = "lcd_clk", .id = 25, },
+ { .n = "sdmmc1_clk", .id = 26, },
+ { .n = "macb1_clk", .id = 27, },
+ { .n = "ssc_clk", .id = 28, },
+ { .n = "can0_clk", .id = 29, },
+ { .n = "can1_clk", .id = 30, },
+ { .n = "flex11_clk", .id = 32, },
+ { .n = "flex12_clk", .id = 33, },
+ { .n = "i2s_clk", .id = 34, },
+ { .n = "qspi_clk", .id = 35, },
+ { .n = "gfx2d_clk", .id = 36, },
+ { .n = "pit64b_clk", .id = 37, },
+ { .n = "trng_clk", .id = 38, },
+ { .n = "aes_clk", .id = 39, },
+ { .n = "tdes_clk", .id = 40, },
+ { .n = "sha_clk", .id = 41, },
+ { .n = "classd_clk", .id = 42, },
+ { .n = "isi_clk", .id = 43, },
+ { .n = "pioD_clk", .id = 44, },
+ { .n = "tcb1_clk", .id = 45, },
+ { .n = "dbgu_clk", .id = 47, },
+ { .n = "mpddr_clk", .id = 49, },
+};
+
+static const struct {
+ char *n;
+ u8 id;
+ struct clk_range r;
+ bool pll;
+} sam9x60_gck[] = {
+ { .n = "flex0_gclk", .id = 5, },
+ { .n = "flex1_gclk", .id = 6, },
+ { .n = "flex2_gclk", .id = 7, },
+ { .n = "flex3_gclk", .id = 8, },
+ { .n = "flex6_gclk", .id = 9, },
+ { .n = "flex7_gclk", .id = 10, },
+ { .n = "flex8_gclk", .id = 11, },
+ { .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, },
+ { .n = "flex4_gclk", .id = 13, },
+ { .n = "flex5_gclk", .id = 14, },
+ { .n = "flex9_gclk", .id = 15, },
+ { .n = "flex10_gclk", .id = 16, },
+ { .n = "tcb0_gclk", .id = 17, },
+ { .n = "adc_gclk", .id = 19, },
+ { .n = "lcd_gclk", .id = 25, .r = { .min = 0, .max = 140000000 }, },
+ { .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, },
+ { .n = "flex11_gclk", .id = 32, },
+ { .n = "flex12_gclk", .id = 33, },
+ { .n = "i2s_gclk", .id = 34, .r = { .min = 0, .max = 105000000 },
+ .pll = true, },
+ { .n = "pit64b_gclk", .id = 37, },
+ { .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 },
+ .pll = true, },
+ { .n = "tcb1_gclk", .id = 45, },
+ { .n = "dbgu_gclk", .id = 47, },
+};
+
+static void __init sam9x60_pmc_setup(struct device_node *np)
+{
+ struct clk_range range = CLK_RANGE(0, 0);
+ const char *td_slck_name, *md_slck_name, *mainxtal_name;
+ struct pmc_data *sam9x60_pmc;
+ const char *parent_names[6];
+ struct regmap *regmap;
+ struct clk_hw *hw;
+ int i;
+ bool bypass;
+
+ i = of_property_match_string(np, "clock-names", "td_slck");
+ if (i < 0)
+ return;
+
+ td_slck_name = of_clk_get_parent_name(np, i);
+
+ i = of_property_match_string(np, "clock-names", "md_slck");
+ if (i < 0)
+ return;
+
+ md_slck_name = of_clk_get_parent_name(np, i);
+
+ i = of_property_match_string(np, "clock-names", "main_xtal");
+ if (i < 0)
+ return;
+ mainxtal_name = of_clk_get_parent_name(np, i);
+
+ regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(regmap))
+ return;
+
+ sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1,
+ nck(sam9x60_systemck),
+ nck(sam9x60_periphck),
+ nck(sam9x60_gck));
+ if (!sam9x60_pmc)
+ return;
+
+ hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 24000000,
+ 50000000);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ bypass = of_property_read_bool(np, "atmel,osc-bypass");
+
+ hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
+ 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);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ sam9x60_pmc->chws[PMC_MAIN] = hw;
+
+ hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "pllack",
+ "mainck", 0, &plla_characteristics);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "upllck",
+ "main_osc", 1, &upll_characteristics);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ sam9x60_pmc->chws[PMC_UTMI] = hw;
+
+ parent_names[0] = md_slck_name;
+ parent_names[1] = "mainck";
+ parent_names[2] = "pllack";
+ hw = at91_clk_register_master(regmap, "masterck", 3, parent_names,
+ &sam9x60_master_layout,
+ &mck_characteristics);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ sam9x60_pmc->chws[PMC_MCK] = hw;
+
+ parent_names[0] = "pllack";
+ parent_names[1] = "upllck";
+ parent_names[2] = "mainck";
+ parent_names[3] = "mainck";
+ hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 4);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ parent_names[0] = md_slck_name;
+ parent_names[1] = td_slck_name;
+ parent_names[2] = "mainck";
+ parent_names[3] = "masterck";
+ parent_names[4] = "pllack";
+ parent_names[5] = "upllck";
+ for (i = 0; i < 8; i++) {
+ char name[6];
+
+ snprintf(name, sizeof(name), "prog%d", i);
+
+ hw = at91_clk_register_programmable(regmap, name,
+ parent_names, 6, i,
+ &sam9x60_programmable_layout);
+ if (IS_ERR(hw))
+ goto err_free;
+ }
+
+ 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);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) {
+ hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
+ &sam9x60_pcr_layout,
+ sam9x60_periphck[i].n,
+ "masterck",
+ sam9x60_periphck[i].id,
+ &range);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) {
+ hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
+ &sam9x60_pcr_layout,
+ sam9x60_gck[i].n,
+ parent_names, 6,
+ sam9x60_gck[i].id,
+ sam9x60_gck[i].pll,
+ &sam9x60_gck[i].r);
+ if (IS_ERR(hw))
+ goto err_free;
+
+ sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw;
+ }
+
+ of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc);
+
+ return;
+
+err_free:
+ pmc_data_free(sam9x60_pmc);
+}
+
+CLK_OF_DECLARE_DRIVER(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup);
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH 6/7] dt-bindings: clk: at91: add bindings for SAM9X60 pmc
2019-02-20 11:26 ` [PATCH 6/7] dt-bindings: clk: at91: add bindings for SAM9X60 pmc Alexandre Belloni
@ 2019-03-25 22:03 ` Rob Herring
0 siblings, 0 replies; 9+ messages in thread
From: Rob Herring @ 2019-03-25 22:03 UTC (permalink / raw)
To: Alexandre Belloni
Cc: Stephen Boyd, Nicolas Ferre, Claudiu Beznea, Michael Turquette,
linux-clk, devicetree, linux-arm-kernel, linux-kernel,
Alexandre Belloni
On Wed, 20 Feb 2019 12:26:04 +0100, Alexandre Belloni wrote:
> Add SAM9X60 PMC compatible string.
>
> Cc: Rob Herring <robh+dt@kernel.org>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
> ---
> Documentation/devicetree/bindings/clock/at91-clock.txt | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2019-03-25 22:03 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-20 11:25 [PATCH 0/7] clk: at91: add sam9x60 pmc clock support Alexandre Belloni
2019-02-20 11:25 ` [PATCH 1/7] clk: at91: allow configuring peripheral PCR layout Alexandre Belloni
2019-02-20 11:26 ` [PATCH 2/7] clk: at91: allow configuring generated " Alexandre Belloni
2019-02-20 11:26 ` [PATCH 3/7] clk: at91: usb: Add sam9x60 support Alexandre Belloni
2019-02-20 11:26 ` [PATCH 4/7] clk: at91: master: " Alexandre Belloni
2019-02-20 11:26 ` [PATCH 5/7] clk: at91: add sam9x60 PLL driver Alexandre Belloni
2019-02-20 11:26 ` [PATCH 6/7] dt-bindings: clk: at91: add bindings for SAM9X60 pmc Alexandre Belloni
2019-03-25 22:03 ` Rob Herring
2019-02-20 11:26 ` [PATCH 7/7] clk: at91: add sam9x60 pmc driver Alexandre Belloni
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).