[PATCH v3 0/4] clk: tegra: add DFLL support for Tegra114

[PATCH v3 0/4] clk: tegra: add DFLL support for Tegra114

[Svyatoslav Ryhel]

DFLL is a dedicated clock source for the Fast CPU. The DFLL is based on
a ring oscillator and translates voltage changes into frequency
compensation changes needed to prevent the CPU from failing and is
essential for correct CPU frequency scaling.

---
Changes in v2:
- dropped 'drivers:' from commit title
- aligned naming to Tegra114

Changes in v3:
- add DFLL support for Tegra 114 was split into dt header addition,
  DFLL reset configuration and CVB tables implementation.
- added cleaner commit message to dt header commit
- added T210_ prefixes to Tegra210 CVB table macros
---

Svyatoslav Ryhel (4):
  dt-bindings: reset: add Tegra114 car header
  clk: tegra: add DFLL DVCO reset control for Tegra114
  clk: tegra: dfll: add CVB tables for Tegra114
  ARM: tegra: Add DFLL clock support for Tegra114

 arch/arm/boot/dts/nvidia/tegra114.dtsi     |  33 +++++
 drivers/clk/tegra/Kconfig                  |   2 +-
 drivers/clk/tegra/clk-tegra114.c           |  30 +++-
 drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 158 +++++++++++++++++----
 drivers/clk/tegra/clk.h                    |   2 -
 include/dt-bindings/reset/tegra114-car.h   |  13 ++
 6 files changed, 204 insertions(+), 34 deletions(-)
 create mode 100644 include/dt-bindings/reset/tegra114-car.h

-- 
2.48.1

[PATCH v3 1/4] dt-bindings: reset: add Tegra114 car header

[Svyatoslav Ryhel]

Binding values for special resets that are placed starting from
software-defined index 160 in line with other chips.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 include/dt-bindings/reset/tegra114-car.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 include/dt-bindings/reset/tegra114-car.h

diff --git a/include/dt-bindings/reset/tegra114-car.h b/include/dt-bindings/reset/tegra114-car.h
new file mode 100644
index 000000000000..d7908d810ddf
--- /dev/null
+++ b/include/dt-bindings/reset/tegra114-car.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+/*
+ * This header provides Tegra114-specific constants for binding
+ * nvidia,tegra114-car.
+ */
+
+#ifndef _DT_BINDINGS_RESET_TEGRA114_CAR_H
+#define _DT_BINDINGS_RESET_TEGRA114_CAR_H
+
+#define TEGRA114_RESET(x)		(5 * 32 + (x))
+#define TEGRA114_RST_DFLL_DVCO		TEGRA114_RESET(0)
+
+#endif	/* _DT_BINDINGS_RESET_TEGRA114_CAR_H */
-- 
2.48.1

Re: [PATCH v3 1/4] dt-bindings: reset: add Tegra114 car header

[Krzysztof Kozlowski]

On 26/08/2025 08:11, Svyatoslav Ryhel wrote:
> Binding values for special resets that are placed starting from
> software-defined index 160 in line with other chips.
> 
> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
> ---
>  include/dt-bindings/reset/tegra114-car.h | 13 +++++++++++++
NAK

You got comments last time and you completely ignored them.

Best regards,
Krzysztof

Re: [PATCH v3 1/4] dt-bindings: reset: add Tegra114 car header

[Mikko Perttunen]

On Tuesday, August 26, 2025 5:21 PM Krzysztof Kozlowski wrote:
> On 26/08/2025 08:11, Svyatoslav Ryhel wrote:
> > Binding values for special resets that are placed starting from
> > software-defined index 160 in line with other chips.
> > 
> > Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
> > ---
> > 
> >  include/dt-bindings/reset/tegra114-car.h | 13 +++++++++++++
> 
> NAK
> 
> You got comments last time and you completely ignored them.
> 
> Best regards,
> Krzysztof

Thierry explained to you last time why this patch makes sense.

The existing binding is such that values below 160 map to clock IDs (in dt-
bindings/clock/tegra114-car.h). We cannot use those numbers for these "special 
resets" that have no corresponding clock, or we'd be changing existing 
binding. Hence this patch starts them at 160, above the clock IDs. The same 
already exists in the tegra124-car binding for TEGRA124_RST_DFLL_DVCO -- this 
just extends that to Tegra114.

Mikko

Re: [PATCH v3 1/4] dt-bindings: reset: add Tegra114 car header

[Krzysztof Kozlowski]

On 26/08/2025 10:29, Mikko Perttunen wrote:
> On Tuesday, August 26, 2025 5:21 PM Krzysztof Kozlowski wrote:
>> On 26/08/2025 08:11, Svyatoslav Ryhel wrote:
>>> Binding values for special resets that are placed starting from
>>> software-defined index 160 in line with other chips.
>>>
>>> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
>>> ---
>>>
>>>  include/dt-bindings/reset/tegra114-car.h | 13 +++++++++++++
>>
>> NAK
>>
>> You got comments last time and you completely ignored them.
>>
>> Best regards,
>> Krzysztof
> 
> Thierry explained to you last time why this patch makes sense.

And each such discussion should be reflected in the commit msg. There is
nothing like that here.

But I am not speaking about this and the values here. I am speaking
about all other comments which were just ignored.


Best regards,
Krzysztof

[PATCH v3 2/4] clk: tegra: add DFLL DVCO reset control for Tegra114

[Svyatoslav Ryhel]

The DVCO present in the DFLL IP block has a separate reset line, exposed
via the CAR IP block.  This reset line is asserted upon SoC reset. Unless
something (such as the DFLL driver) deasserts this line, the DVCO will not
oscillate, although reads and writes to the DFLL IP block will complete.

Based on a3c83ff2 ("clk: tegra: Add DFLL DVCO reset control for Tegra124")

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 drivers/clk/tegra/clk-tegra114.c | 30 ++++++++++++++++++++++++++----
 drivers/clk/tegra/clk.h          |  2 --
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
index 186b0b81c1ec..3eaa97c7d79e 100644
--- a/drivers/clk/tegra/clk-tegra114.c
+++ b/drivers/clk/tegra/clk-tegra114.c
@@ -11,6 +11,7 @@
 #include <linux/export.h>
 #include <linux/clk/tegra.h>
 #include <dt-bindings/clock/tegra114-car.h>
+#include <dt-bindings/reset/tegra114-car.h>
 
 #include "clk.h"
 #include "clk-id.h"
@@ -1274,7 +1275,7 @@ EXPORT_SYMBOL(tegra114_clock_tune_cpu_trimmers_init);
  *
  * Assert the reset line of the DFLL's DVCO.  No return value.
  */
-void tegra114_clock_assert_dfll_dvco_reset(void)
+static void tegra114_clock_assert_dfll_dvco_reset(void)
 {
 	u32 v;
 
@@ -1283,7 +1284,6 @@ void tegra114_clock_assert_dfll_dvco_reset(void)
 	writel_relaxed(v, clk_base + RST_DFLL_DVCO);
 	tegra114_car_barrier();
 }
-EXPORT_SYMBOL(tegra114_clock_assert_dfll_dvco_reset);
 
 /**
  * tegra114_clock_deassert_dfll_dvco_reset - deassert the DFLL's DVCO reset
@@ -1291,7 +1291,7 @@ EXPORT_SYMBOL(tegra114_clock_assert_dfll_dvco_reset);
  * Deassert the reset line of the DFLL's DVCO, allowing the DVCO to
  * operate.  No return value.
  */
-void tegra114_clock_deassert_dfll_dvco_reset(void)
+static void tegra114_clock_deassert_dfll_dvco_reset(void)
 {
 	u32 v;
 
@@ -1300,7 +1300,26 @@ void tegra114_clock_deassert_dfll_dvco_reset(void)
 	writel_relaxed(v, clk_base + RST_DFLL_DVCO);
 	tegra114_car_barrier();
 }
-EXPORT_SYMBOL(tegra114_clock_deassert_dfll_dvco_reset);
+
+static int tegra114_reset_assert(unsigned long id)
+{
+	if (id == TEGRA114_RST_DFLL_DVCO)
+		tegra114_clock_assert_dfll_dvco_reset();
+	else
+		return -EINVAL;
+
+	return 0;
+}
+
+static int tegra114_reset_deassert(unsigned long id)
+{
+	if (id == TEGRA114_RST_DFLL_DVCO)
+		tegra114_clock_deassert_dfll_dvco_reset();
+	else
+		return -EINVAL;
+
+	return 0;
+}
 
 static void __init tegra114_clock_init(struct device_node *np)
 {
@@ -1346,6 +1365,9 @@ static void __init tegra114_clock_init(struct device_node *np)
 	tegra_super_clk_gen4_init(clk_base, pmc_base, tegra114_clks,
 					&pll_x_params);
 
+	tegra_init_special_resets(1, tegra114_reset_assert,
+				  tegra114_reset_deassert);
+
 	tegra_add_of_provider(np, of_clk_src_onecell_get);
 	tegra_register_devclks(devclks, ARRAY_SIZE(devclks));
 
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index 5d80d8b79b8e..58e860b18e5e 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -898,8 +898,6 @@ static inline bool tegra124_clk_emc_driver_available(struct clk_hw *emc_hw)
 void tegra114_clock_tune_cpu_trimmers_high(void);
 void tegra114_clock_tune_cpu_trimmers_low(void);
 void tegra114_clock_tune_cpu_trimmers_init(void);
-void tegra114_clock_assert_dfll_dvco_reset(void);
-void tegra114_clock_deassert_dfll_dvco_reset(void);
 
 typedef void (*tegra_clk_apply_init_table_func)(void);
 extern tegra_clk_apply_init_table_func tegra_clk_apply_init_table;
-- 
2.48.1

[PATCH v3 3/4] clk: tegra: dfll: add CVB tables for Tegra114

[Svyatoslav Ryhel]

Extend the Tegra124 DFLL driver to include configuration settings required
for Tegra114 compatibility.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 drivers/clk/tegra/Kconfig                  |   2 +-
 drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 158 +++++++++++++++++----
 2 files changed, 132 insertions(+), 28 deletions(-)

diff --git a/drivers/clk/tegra/Kconfig b/drivers/clk/tegra/Kconfig
index 90df619dc087..62147a069606 100644
--- a/drivers/clk/tegra/Kconfig
+++ b/drivers/clk/tegra/Kconfig
@@ -4,7 +4,7 @@ config CLK_TEGRA_BPMP
 	depends on TEGRA_BPMP
 
 config TEGRA_CLK_DFLL
-	depends on ARCH_TEGRA_124_SOC || ARCH_TEGRA_210_SOC
+	depends on ARCH_TEGRA_114_SOC || ARCH_TEGRA_124_SOC || ARCH_TEGRA_210_SOC
 	select PM_OPP
 	def_bool y
 
diff --git a/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c b/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
index 0251618b82c8..1405217fed5d 100644
--- a/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
+++ b/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
@@ -28,6 +28,99 @@ struct dfll_fcpu_data {
 	unsigned int cpu_cvb_tables_size;
 };
 
+/* Maximum CPU frequency, indexed by CPU speedo id */
+static const unsigned long tegra114_cpu_max_freq_table[] = {
+	[0] = 2040000000UL,
+	[1] = 1810500000UL,
+	[2] = 1912500000UL,
+	[3] = 1810500000UL,
+};
+
+#define T114_CPU_CVB_TABLE \
+	.min_millivolts = 1000, \
+	.max_millivolts = 1320, \
+	.speedo_scale = 100,    \
+	.voltage_scale = 1000,  \
+	.entries = {            \
+		{  306000000UL, { 2190643, -141851, 3576 } }, \
+		{  408000000UL, { 2250968, -144331, 3576 } }, \
+		{  510000000UL, { 2313333, -146811, 3576 } }, \
+		{  612000000UL, { 2377738, -149291, 3576 } }, \
+		{  714000000UL, { 2444183, -151771, 3576 } }, \
+		{  816000000UL, { 2512669, -154251, 3576 } }, \
+		{  918000000UL, { 2583194, -156731, 3576 } }, \
+		{ 1020000000UL, { 2655759, -159211, 3576 } }, \
+		{ 1122000000UL, { 2730365, -161691, 3576 } }, \
+		{ 1224000000UL, { 2807010, -164171, 3576 } }, \
+		{ 1326000000UL, { 2885696, -166651, 3576 } }, \
+		{ 1428000000UL, { 2966422, -169131, 3576 } }, \
+		{ 1530000000UL, { 3049183, -171601, 3576 } }, \
+		{ 1606500000UL, { 3112179, -173451, 3576 } }, \
+		{ 1708500000UL, { 3198504, -175931, 3576 } }, \
+		{ 1810500000UL, { 3304747, -179126, 3576 } }, \
+		{ 1912500000UL, { 3395401, -181606, 3576 } }, \
+		{          0UL, {       0,       0,    0 } }, \
+	}, \
+	.cpu_dfll_data = {      \
+		.tune0_low = 0x00b0039d,          \
+		.tune0_high = 0x00b0009d,         \
+		.tune1 = 0x0000001f,              \
+		.tune_high_min_millivolts = 1050, \
+	}
+
+static const struct cvb_table tegra114_cpu_cvb_tables[] = {
+	{
+		.speedo_id = 0,
+		.process_id = -1,
+		.min_millivolts = 1000,
+		.max_millivolts = 1250,
+		.speedo_scale = 100,
+		.voltage_scale = 100,
+		.entries = {
+			{  306000000UL, { 107330, -1569,   0 } },
+			{  408000000UL, { 111250, -1666,   0 } },
+			{  510000000UL, { 110000, -1460,   0 } },
+			{  612000000UL, { 117290, -1745,   0 } },
+			{  714000000UL, { 122700, -1910,   0 } },
+			{  816000000UL, { 125620, -1945,   0 } },
+			{  918000000UL, { 130560, -2076,   0 } },
+			{ 1020000000UL, { 137280, -2303,   0 } },
+			{ 1122000000UL, { 146440, -2660,   0 } },
+			{ 1224000000UL, { 152190, -2825,   0 } },
+			{ 1326000000UL, { 157520, -2953,   0 } },
+			{ 1428000000UL, { 166100, -3261,   0 } },
+			{ 1530000000UL, { 176410, -3647,   0 } },
+			{ 1632000000UL, { 189620, -4186,   0 } },
+			{ 1734000000UL, { 203190, -4725,   0 } },
+			{ 1836000000UL, { 222670, -5573,   0 } },
+			{ 1938000000UL, { 256210, -7165,   0 } },
+			{ 2040000000UL, { 250050, -6544,   0 } },
+			{          0UL, {      0,     0,   0 } },
+		},
+		.cpu_dfll_data = {
+			.tune0_low = 0x00b0019d,
+			.tune0_high = 0x00b0019d,
+			.tune1 = 0x0000001f,
+			.tune_high_min_millivolts = 1000,
+		}
+	},
+	{
+		.speedo_id = 1,
+		.process_id = -1,
+		T114_CPU_CVB_TABLE
+	},
+	{
+		.speedo_id = 2,
+		.process_id = -1,
+		T114_CPU_CVB_TABLE
+	},
+	{
+		.speedo_id = 3,
+		.process_id = -1,
+		T114_CPU_CVB_TABLE
+	},
+};
+
 /* Maximum CPU frequency, indexed by CPU speedo id */
 static const unsigned long tegra124_cpu_max_freq_table[] = {
 	[0] = 2014500000UL,
@@ -93,7 +186,7 @@ static const unsigned long tegra210_cpu_max_freq_table[] = {
 	[10] = 1504500000UL,
 };
 
-#define CPU_CVB_TABLE \
+#define T210_CPU_CVB_TABLE \
 	.speedo_scale = 100,	\
 	.voltage_scale = 1000,	\
 	.entries = {		\
@@ -120,7 +213,7 @@ static const unsigned long tegra210_cpu_max_freq_table[] = {
 		{          0UL,	{       0,      0,   0 } }, \
 	}
 
-#define CPU_CVB_TABLE_XA \
+#define T210_CPU_CVB_TABLE_XA \
 	.speedo_scale = 100,	\
 	.voltage_scale = 1000,	\
 	.entries = {		\
@@ -143,7 +236,7 @@ static const unsigned long tegra210_cpu_max_freq_table[] = {
 		{          0UL,	{       0,      0,   0 } }, \
 	}
 
-#define CPU_CVB_TABLE_EUCM1 \
+#define T210_CPU_CVB_TABLE_EUCM1 \
 	.speedo_scale = 100,	\
 	.voltage_scale = 1000,	\
 	.entries = {		\
@@ -166,7 +259,7 @@ static const unsigned long tegra210_cpu_max_freq_table[] = {
 		{          0UL,	{       0, 0, 0 } }, \
 	}
 
-#define CPU_CVB_TABLE_EUCM2 \
+#define T210_CPU_CVB_TABLE_EUCM2 \
 	.speedo_scale = 100,	\
 	.voltage_scale = 1000,	\
 	.entries = {		\
@@ -188,7 +281,7 @@ static const unsigned long tegra210_cpu_max_freq_table[] = {
 		{          0UL,	{       0, 0, 0 } }, \
 	}
 
-#define CPU_CVB_TABLE_EUCM2_JOINT_RAIL \
+#define T210_CPU_CVB_TABLE_EUCM2_JOINT_RAIL \
 	.speedo_scale = 100,	\
 	.voltage_scale = 1000,	\
 	.entries = {		\
@@ -209,7 +302,7 @@ static const unsigned long tegra210_cpu_max_freq_table[] = {
 		{          0UL,	{       0, 0, 0 } }, \
 	}
 
-#define CPU_CVB_TABLE_ODN \
+#define T210_CPU_CVB_TABLE_ODN \
 	.speedo_scale = 100,	\
 	.voltage_scale = 1000,	\
 	.entries = {		\
@@ -238,7 +331,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 840,
 		.max_millivolts = 1120,
-		CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
+		T210_CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -251,7 +344,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 840,
 		.max_millivolts = 1120,
-		CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
+		T210_CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -264,7 +357,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 900,
 		.max_millivolts = 1162,
-		CPU_CVB_TABLE_EUCM2,
+		T210_CPU_CVB_TABLE_EUCM2,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -276,7 +369,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 900,
 		.max_millivolts = 1162,
-		CPU_CVB_TABLE_EUCM2,
+		T210_CPU_CVB_TABLE_EUCM2,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -288,7 +381,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 900,
 		.max_millivolts = 1195,
-		CPU_CVB_TABLE_EUCM2,
+		T210_CPU_CVB_TABLE_EUCM2,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -300,7 +393,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 900,
 		.max_millivolts = 1195,
-		CPU_CVB_TABLE_EUCM2,
+		T210_CPU_CVB_TABLE_EUCM2,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -312,7 +405,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 841,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE_EUCM1,
+		T210_CPU_CVB_TABLE_EUCM1,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -325,7 +418,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 841,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE_EUCM1,
+		T210_CPU_CVB_TABLE_EUCM1,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -338,7 +431,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 870,
 		.max_millivolts = 1150,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune1 = 0x20091d9,
@@ -349,7 +442,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 870,
 		.max_millivolts = 1150,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune1 = 0x25501d0,
@@ -360,7 +453,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 818,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -373,7 +466,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 818,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -386,7 +479,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = -1,
 		.min_millivolts = 918,
 		.max_millivolts = 1113,
-		CPU_CVB_TABLE_XA,
+		T210_CPU_CVB_TABLE_XA,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune1 = 0x17711BD,
@@ -397,7 +490,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 825,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE_ODN,
+		T210_CPU_CVB_TABLE_ODN,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -410,7 +503,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 825,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE_ODN,
+		T210_CPU_CVB_TABLE_ODN,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -423,7 +516,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 870,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune1 = 0x20091d9,
@@ -434,7 +527,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 870,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune1 = 0x25501d0,
@@ -445,7 +538,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 837,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -458,7 +551,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 837,
 		.max_millivolts = 1227,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -471,7 +564,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 0,
 		.min_millivolts = 850,
 		.max_millivolts = 1170,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -484,7 +577,7 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 		.process_id = 1,
 		.min_millivolts = 850,
 		.max_millivolts = 1170,
-		CPU_CVB_TABLE,
+		T210_CPU_CVB_TABLE,
 		.cpu_dfll_data = {
 			.tune0_low = 0xffead0ff,
 			.tune0_high = 0xffead0ff,
@@ -494,6 +587,13 @@ static struct cvb_table tegra210_cpu_cvb_tables[] = {
 	},
 };
 
+static const struct dfll_fcpu_data tegra114_dfll_fcpu_data = {
+	.cpu_max_freq_table = tegra114_cpu_max_freq_table,
+	.cpu_max_freq_table_size = ARRAY_SIZE(tegra114_cpu_max_freq_table),
+	.cpu_cvb_tables = tegra114_cpu_cvb_tables,
+	.cpu_cvb_tables_size = ARRAY_SIZE(tegra114_cpu_cvb_tables)
+};
+
 static const struct dfll_fcpu_data tegra124_dfll_fcpu_data = {
 	.cpu_max_freq_table = tegra124_cpu_max_freq_table,
 	.cpu_max_freq_table_size = ARRAY_SIZE(tegra124_cpu_max_freq_table),
@@ -509,6 +609,10 @@ static const struct dfll_fcpu_data tegra210_dfll_fcpu_data = {
 };
 
 static const struct of_device_id tegra124_dfll_fcpu_of_match[] = {
+	{
+		.compatible = "nvidia,tegra114-dfll",
+		.data = &tegra114_dfll_fcpu_data,
+	},
 	{
 		.compatible = "nvidia,tegra124-dfll",
 		.data = &tegra124_dfll_fcpu_data,
-- 
2.48.1

[PATCH v3 4/4] ARM: tegra: Add DFLL clock support for Tegra114

[Svyatoslav Ryhel]

Add DFLL clock node to common Tegra114 device tree along with clocks
property to cpu node.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 arch/arm/boot/dts/nvidia/tegra114.dtsi | 33 ++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
index 4caf2073c556..c429478eb122 100644
--- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
+++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
@@ -4,6 +4,7 @@
 #include <dt-bindings/memory/tegra114-mc.h>
 #include <dt-bindings/pinctrl/pinctrl-tegra.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/reset/tegra114-car.h>
 #include <dt-bindings/soc/tegra-pmc.h>
 
 / {
@@ -693,6 +694,29 @@ mipi: mipi@700e3000 {
 		#nvidia,mipi-calibrate-cells = <1>;
 	};
 
+	dfll: clock@70110000 {
+		compatible = "nvidia,tegra114-dfll";
+		reg = <0x70110000 0x100>, /* DFLL control */
+		      <0x70110000 0x100>, /* I2C output control */
+		      <0x70110100 0x100>, /* Integrated I2C controller */
+		      <0x70110200 0x100>; /* Look-up table RAM */
+		interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&tegra_car TEGRA114_CLK_DFLL_SOC>,
+			 <&tegra_car TEGRA114_CLK_DFLL_REF>,
+			 <&tegra_car TEGRA114_CLK_I2C5>;
+		clock-names = "soc", "ref", "i2c";
+		resets = <&tegra_car TEGRA114_RST_DFLL_DVCO>;
+		reset-names = "dvco";
+		#clock-cells = <0>;
+		clock-output-names = "dfllCPU_out";
+		nvidia,droop-ctrl = <0x00000f00>;
+		nvidia,force-mode = <1>;
+		nvidia,cf = <10>;
+		nvidia,ci = <0>;
+		nvidia,cg = <2>;
+		status = "disabled";
+	};
+
 	mmc@78000000 {
 		compatible = "nvidia,tegra114-sdhci";
 		reg = <0x78000000 0x200>;
@@ -824,6 +848,15 @@ cpu0: cpu@0 {
 			device_type = "cpu";
 			compatible = "arm,cortex-a15";
 			reg = <0>;
+
+			clocks = <&tegra_car TEGRA114_CLK_CCLK_G>,
+				 <&tegra_car TEGRA114_CLK_CCLK_LP>,
+				 <&tegra_car TEGRA114_CLK_PLL_X>,
+				 <&tegra_car TEGRA114_CLK_PLL_P>,
+				 <&dfll>;
+			clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll";
+			/* FIXME: what's the actual transition time? */
+			clock-latency = <300000>;
 		};
 
 		cpu1: cpu@1 {
-- 
2.48.1

Re: [PATCH v3 0/4] clk: tegra: add DFLL support for Tegra114

[Mikko Perttunen]

On Tuesday, August 26, 2025 3:11 PM Svyatoslav Ryhel wrote:
> DFLL is a dedicated clock source for the Fast CPU. The DFLL is based on
> a ring oscillator and translates voltage changes into frequency
> compensation changes needed to prevent the CPU from failing and is
> essential for correct CPU frequency scaling.
> 
> ---
> Changes in v2:
> - dropped 'drivers:' from commit title
> - aligned naming to Tegra114
> 
> Changes in v3:
> - add DFLL support for Tegra 114 was split into dt header addition,
>   DFLL reset configuration and CVB tables implementation.
> - added cleaner commit message to dt header commit
> - added T210_ prefixes to Tegra210 CVB table macros
> ---
> 
> Svyatoslav Ryhel (4):
>   dt-bindings: reset: add Tegra114 car header
>   clk: tegra: add DFLL DVCO reset control for Tegra114
>   clk: tegra: dfll: add CVB tables for Tegra114
>   ARM: tegra: Add DFLL clock support for Tegra114
> 
>  arch/arm/boot/dts/nvidia/tegra114.dtsi     |  33 +++++
>  drivers/clk/tegra/Kconfig                  |   2 +-
>  drivers/clk/tegra/clk-tegra114.c           |  30 +++-
>  drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 158 +++++++++++++++++----
>  drivers/clk/tegra/clk.h                    |   2 -
>  include/dt-bindings/reset/tegra114-car.h   |  13 ++
>  6 files changed, 204 insertions(+), 34 deletions(-)
>  create mode 100644 include/dt-bindings/reset/tegra114-car.h

Whole series,

Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>

Re: [PATCH v3 0/4] clk: tegra: add DFLL support for Tegra114

[Rob Herring (Arm)]

On Tue, 26 Aug 2025 09:11:13 +0300, Svyatoslav Ryhel wrote:
> DFLL is a dedicated clock source for the Fast CPU. The DFLL is based on
> a ring oscillator and translates voltage changes into frequency
> compensation changes needed to prevent the CPU from failing and is
> essential for correct CPU frequency scaling.
> 
> ---
> Changes in v2:
> - dropped 'drivers:' from commit title
> - aligned naming to Tegra114
> 
> Changes in v3:
> - add DFLL support for Tegra 114 was split into dt header addition,
>   DFLL reset configuration and CVB tables implementation.
> - added cleaner commit message to dt header commit
> - added T210_ prefixes to Tegra210 CVB table macros
> ---
> 
> Svyatoslav Ryhel (4):
>   dt-bindings: reset: add Tegra114 car header
>   clk: tegra: add DFLL DVCO reset control for Tegra114
>   clk: tegra: dfll: add CVB tables for Tegra114
>   ARM: tegra: Add DFLL clock support for Tegra114
> 
>  arch/arm/boot/dts/nvidia/tegra114.dtsi     |  33 +++++
>  drivers/clk/tegra/Kconfig                  |   2 +-
>  drivers/clk/tegra/clk-tegra114.c           |  30 +++-
>  drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 158 +++++++++++++++++----
>  drivers/clk/tegra/clk.h                    |   2 -
>  include/dt-bindings/reset/tegra114-car.h   |  13 ++
>  6 files changed, 204 insertions(+), 34 deletions(-)
>  create mode 100644 include/dt-bindings/reset/tegra114-car.h
> 
> --
> 2.48.1
> 
> 
> 


My bot found new DTB warnings on the .dts files added or changed in this
series.

Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
are fixed by another series. Ultimately, it is up to the platform
maintainer whether these warnings are acceptable or not. No need to reply
unless the platform maintainer has comments.

If you already ran DT checks and didn't see these error(s), then
make sure dt-schema is up to date:

  pip3 install dtschema --upgrade


This patch series was applied (using b4) to base:
 Base: attempting to guess base-commit...
 Base: tags/next-20250825 (best guess, 3/5 blobs matched)

If this is not the correct base, please add 'base-commit' tag
(or use b4 which does this automatically)

New warnings running 'make CHECK_DTBS=y for arch/arm/boot/dts/nvidia/' for 20250826061117.63643-1-clamor95@gmail.com:

arch/arm/boot/dts/nvidia/tegra114-tn7.dtb: /clock@70110000: failed to match any schema with compatible: ['nvidia,tegra114-dfll']
arch/arm/boot/dts/nvidia/tegra114-tn7.dtb: cpu@0 (arm,cortex-a15): 'operating-points' is a dependency of 'clock-latency'
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-tn7.dtb: cpu@0 (arm,cortex-a15): Unevaluated properties are not allowed ('clock-latency' was unexpected)
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-roth.dtb: /clock@70110000: failed to match any schema with compatible: ['nvidia,tegra114-dfll']
arch/arm/boot/dts/nvidia/tegra114-roth.dtb: cpu@0 (arm,cortex-a15): 'operating-points' is a dependency of 'clock-latency'
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-roth.dtb: cpu@0 (arm,cortex-a15): Unevaluated properties are not allowed ('clock-latency' was unexpected)
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-dalmore.dtb: /clock@70110000: failed to match any schema with compatible: ['nvidia,tegra114-dfll']
arch/arm/boot/dts/nvidia/tegra114-dalmore.dtb: cpu@0 (arm,cortex-a15): 'operating-points' is a dependency of 'clock-latency'
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-dalmore.dtb: cpu@0 (arm,cortex-a15): Unevaluated properties are not allowed ('clock-latency' was unexpected)
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dtb: /clock@70110000: failed to match any schema with compatible: ['nvidia,tegra114-dfll']
arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dtb: cpu@0 (arm,cortex-a15): 'operating-points' is a dependency of 'clock-latency'
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#
arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dtb: cpu@0 (arm,cortex-a15): Unevaluated properties are not allowed ('clock-latency' was unexpected)
	from schema $id: http://devicetree.org/schemas/arm/cpus.yaml#