[GIT PULL 0/4] samsung: Pull for v5.9

[GIT PULL 0/4] samsung: Pull for v5.9

[Krzysztof Kozlowski]

Hi,

I have for you three tags to pull and one drivers/soc patch to apply directly.

Best regards,
Krzysztof

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[GIT PULL 1/4] ARM: dts: samsung: DTS for v5.9

[Krzysztof Kozlowski]

The following changes since commit b3a9e3b9622ae10064826dccb4f7a52bd88c7407:

  Linux 5.8-rc1 (2020-06-14 12:45:04 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git tags/samsung-dt-5.9

for you to fetch changes up to f37b5d3aef8db06390cb7ef25585b39f89c1dedf:

  ARM: dts: exynos: Replace HTTP links with HTTPS ones (2020-07-20 16:43:28 +0200)

----------------------------------------------------------------
Samsung DTS ARM changes for v5.9

1. Enable Bluetooth on Artik5 (Exynos3250).
2. Enable accelerometer on Aries boards (Samsung Galaxy S family,
   S5Pv210); multiple fixes.
3. Fix highest frequencies on Exynos5800.
4. Fix rare USB instability on Odroid XU3 family (Exynos5422).
5. Minor DTS fixes and adjustments with dtschema.

----------------------------------------------------------------
Alexander A. Klimov (1):
      ARM: dts: exynos: Replace HTTP links with HTTPS ones

Anand Moon (1):
      ARM: dts: exynos: Align L2 cache-controller nodename with dtschema

Jonathan Bakker (5):
      ARM: dts: s5pv210: Add interrupt-controller property to gph3
      ARM: dts: s5pv210: Correct fuelgauge definition on Aries
      ARM: dts: s5pv210: Add support for GP2A light sensor on Aries
      ARM: dts: s5pv210: Add BMA023 accelerometer support to Aries
      ARM: dts: s5pv210: Correct BCM4329 bluetooth node

Krzysztof Kozlowski (5):
      ARM: dts: exynos: Fix missing empty reg/ranges property regulators on Trats
      ARM: dts: exynos: Remove DMA controller bus node name to fix dtschema warnings
      ARM: dts: exynos: Define fixed regulators in root node for consistency in Origen
      ARM: dts: exynos: Define fixed regulators in root node for consistency in Arndale
      ARM: dts: exynos: Define fixed regulators in root node for consistency in SMDK5420

Marek Szyprowski (3):
      ARM: dts: exynos: Extend all Exynos5800 A15's OPPs with max voltage data
      ARM: dts: exynos: Enable Bluetooth support for Artik5 board
      ARM: dts: exynos: Disable frequency scaling for FSYS bus on Odroid XU3 family

 arch/arm/boot/dts/exynos3250-artik5.dtsi        |  41 ++++++++
 arch/arm/boot/dts/exynos3250.dtsi               |  47 ++++-----
 arch/arm/boot/dts/exynos4.dtsi                  |  70 ++++++-------
 arch/arm/boot/dts/exynos4210-trats.dts          |  98 +++++++++---------
 arch/arm/boot/dts/exynos4210-universal_c210.dts |  28 ++---
 arch/arm/boot/dts/exynos4210.dtsi               |   2 +-
 arch/arm/boot/dts/exynos4412-origen.dts         |  21 ++--
 arch/arm/boot/dts/exynos4412.dtsi               |   2 +-
 arch/arm/boot/dts/exynos5250-arndale.dts        |  86 +++++++---------
 arch/arm/boot/dts/exynos5250.dtsi               |  92 ++++++++---------
 arch/arm/boot/dts/exynos5410-pinctrl.dtsi       |   2 +-
 arch/arm/boot/dts/exynos5410.dtsi               |  46 ++++-----
 arch/arm/boot/dts/exynos5420-smdk5420.dts       |  53 ++++------
 arch/arm/boot/dts/exynos5420.dtsi               | 130 +++++++++++-------------
 arch/arm/boot/dts/exynos5422-odroid-core.dtsi   |   6 --
 arch/arm/boot/dts/exynos5800.dtsi               |   6 +-
 arch/arm/boot/dts/s5pv210-aries.dtsi            |  90 ++++++++++++++--
 arch/arm/boot/dts/s5pv210-fascinate4g.dts       |  17 ++++
 arch/arm/boot/dts/s5pv210-pinctrl.dtsi          |   2 +
 19 files changed, 445 insertions(+), 394 deletions(-)

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[GIT PULL 2/4] arm64: dts: samsung: DTS for v5.9

[Krzysztof Kozlowski]

The following changes since commit b3a9e3b9622ae10064826dccb4f7a52bd88c7407:

  Linux 5.8-rc1 (2020-06-14 12:45:04 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git tags/samsung-dt64-5.9

for you to fetch changes up to 229134cc51d739bc99264ee14b7a783d479ce205:

  arm64: dts: exynos: Add unit address to soc node and move thermal zones on Exynos7 (2020-07-07 08:45:47 +0200)

----------------------------------------------------------------
Samsung DTS ARM64 changes for v5.9

1. Enable UFS (Universal Flash Storage) on Exynos7 Espresso board.
2. Fix silent hang after boot off Exynos7 Espresso board.
3. Minor DTS fixes and adjustments with dtschema.

----------------------------------------------------------------
Alim Akhtar (3):
      arm64: dts: exynos: Add UFS node to Exynos7
      arm64: dts: exynos: Fix silent hang after boot on Espresso
      arm64: dts: exynos: Keep LDO12 always-on on Espresso

Krzysztof Kozlowski (5):
      arm64: dts: exynos: Describe PWM interrupts on Exynos7
      arm64: dts: exynos: Remove generic arm,armv8-pmuv3 compatible
      arm64: dts: exynos: Remove DMA controller bus node name to fix dtschema warnings
      arm64: dts: exynos: Add unit address to soc node on Exynos5433
      arm64: dts: exynos: Add unit address to soc node and move thermal zones on Exynos7

 arch/arm64/boot/dts/exynos/exynos5433.dtsi      |  53 +++++------
 arch/arm64/boot/dts/exynos/exynos7-espresso.dts |   6 ++
 arch/arm64/boot/dts/exynos/exynos7.dtsi         | 111 ++++++++++++++++--------
 3 files changed, 103 insertions(+), 67 deletions(-)

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[GIT PULL 3/4] ARM: samsung: mach/soc for v5.9

[Krzysztof Kozlowski]

The following changes since commit b3a9e3b9622ae10064826dccb4f7a52bd88c7407:

  Linux 5.8-rc1 (2020-06-14 12:45:04 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git tags/samsung-soc-5.9

for you to fetch changes up to 3ecdf2a5d262df01bc100472cb909580d0fdce69:

  ARM: s3c24xx: Replace HTTP links with HTTPS ones (2020-07-20 16:42:28 +0200)

----------------------------------------------------------------
Samsung mach/soc changes for v5.9

1. Restore big.LITTLE cpuidle support on Exynos542x boards.
2. Cleanups and minor fixes.

----------------------------------------------------------------
Alexander A. Klimov (1):
      ARM: s3c24xx: Replace HTTP links with HTTPS ones

Guillaume Tucker (1):
      ARM: exynos: clear L310_AUX_CTRL_FULL_LINE_ZERO in default l2c_aux_val

Linus Walleij (1):
      ARM: s3c24xx: leds: Convert to use GPIO descriptors

Marek Szyprowski (1):
      ARM: exynos: MCPM: Restore big.LITTLE cpuidle support

 arch/arm/mach-exynos/exynos.c              |  2 +-
 arch/arm/mach-exynos/mcpm-exynos.c         | 10 +++--
 arch/arm/mach-s3c24xx/Kconfig              |  2 +-
 arch/arm/mach-s3c24xx/common-smdk.c        | 67 ++++++++++++++++++++----------
 arch/arm/mach-s3c24xx/mach-h1940.c         |  2 +-
 arch/arm/mach-s3c24xx/mach-mini2440.c      | 65 ++++++++++++++++++++++++-----
 arch/arm/mach-s3c24xx/mach-n30.c           | 56 +++++++++++++++++++++----
 arch/arm/mach-s3c24xx/mach-qt2410.c        | 12 +++++-
 arch/arm/mach-s3c24xx/mach-rx3715.c        |  2 +-
 arch/arm/mach-s3c24xx/mach-vr1000.c        | 38 +++++++++++++++--
 drivers/leds/leds-s3c24xx.c                | 36 ++++------------
 include/linux/platform_data/leds-s3c24xx.h |  6 ---
 12 files changed, 212 insertions(+), 86 deletions(-)

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[PATCH 4/4] soc: samsung: exynos-regulator-coupler: Add simple voltage coupler for Exynos5800

[Krzysztof Kozlowski]

From: Marek Szyprowski <m.szyprowski@samsung.com>

Add a simple custom voltage regulator coupler for Exynos5800 SoCs, which
require coupling between "vdd_arm" and "vdd_int" regulators. This coupler
ensures that the voltage values don't go below the bootloader-selected
operation point during the boot process until the clients set their
constraints. It is achieved by assuming minimal voltage value equal to
the current value if no constraints are set. This also ensures proper
voltage balancing if any of the client driver is missing.

The balancing code comes from the regulator/core.c with the additional
logic for handling regulators without client constraints applied added.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 arch/arm/mach-exynos/Kconfig                  |   1 +
 drivers/soc/samsung/Kconfig                   |   3 +
 drivers/soc/samsung/Makefile                  |   1 +
 .../soc/samsung/exynos-regulator-coupler.c    | 221 ++++++++++++++++++
 4 files changed, 226 insertions(+)
 create mode 100644 drivers/soc/samsung/exynos-regulator-coupler.c

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 76838255b5fa..f185cd3d4c62 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -118,6 +118,7 @@ config SOC_EXYNOS5800
 	bool "Samsung EXYNOS5800"
 	default y
 	depends on SOC_EXYNOS5420
+	select EXYNOS_REGULATOR_COUPLER
 
 config EXYNOS_MCPM
 	bool
diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig
index c7a2003687c7..264185664594 100644
--- a/drivers/soc/samsung/Kconfig
+++ b/drivers/soc/samsung/Kconfig
@@ -37,4 +37,7 @@ config EXYNOS_PM_DOMAINS
 	bool "Exynos PM domains" if COMPILE_TEST
 	depends on PM_GENERIC_DOMAINS || COMPILE_TEST
 
+config EXYNOS_REGULATOR_COUPLER
+	bool "Exynos SoC Regulator Coupler" if COMPILE_TEST
+	depends on ARCH_EXYNOS || COMPILE_TEST
 endif
diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile
index edd1d6ea064d..ecc3a32f6406 100644
--- a/drivers/soc/samsung/Makefile
+++ b/drivers/soc/samsung/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_EXYNOS_PMU)	+= exynos-pmu.o
 obj-$(CONFIG_EXYNOS_PMU_ARM_DRIVERS)	+= exynos3250-pmu.o exynos4-pmu.o \
 					exynos5250-pmu.o exynos5420-pmu.o
 obj-$(CONFIG_EXYNOS_PM_DOMAINS) += pm_domains.o
+obj-$(CONFIG_EXYNOS_REGULATOR_COUPLER) += exynos-regulator-coupler.o
diff --git a/drivers/soc/samsung/exynos-regulator-coupler.c b/drivers/soc/samsung/exynos-regulator-coupler.c
new file mode 100644
index 000000000000..61a156b44a48
--- /dev/null
+++ b/drivers/soc/samsung/exynos-regulator-coupler.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
+ *	      http://www.samsung.com/
+ * Author: Marek Szyprowski <m.szyprowski@samsung.com>
+ *
+ * Simplified generic voltage coupler from regulator core.c
+ * The main difference is that it keeps current regulator voltage
+ * if consumers didn't apply their constraints yet.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/regulator/coupler.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+static int regulator_get_optimal_voltage(struct regulator_dev *rdev,
+					 int *current_uV,
+					 int *min_uV, int *max_uV,
+					 suspend_state_t state)
+{
+	struct coupling_desc *c_desc = &rdev->coupling_desc;
+	struct regulator_dev **c_rdevs = c_desc->coupled_rdevs;
+	struct regulation_constraints *constraints = rdev->constraints;
+	int desired_min_uV = 0, desired_max_uV = INT_MAX;
+	int max_current_uV = 0, min_current_uV = INT_MAX;
+	int highest_min_uV = 0, target_uV, possible_uV;
+	int i, ret, max_spread, n_coupled = c_desc->n_coupled;
+	bool done;
+
+	*current_uV = -1;
+
+	/* Find highest min desired voltage */
+	for (i = 0; i < n_coupled; i++) {
+		int tmp_min = 0;
+		int tmp_max = INT_MAX;
+
+		lockdep_assert_held_once(&c_rdevs[i]->mutex.base);
+
+		ret = regulator_check_consumers(c_rdevs[i],
+						&tmp_min,
+						&tmp_max, state);
+		if (ret < 0)
+			return ret;
+
+		if (tmp_min == 0) {
+			ret = regulator_get_voltage_rdev(c_rdevs[i]);
+			if (ret < 0)
+				return ret;
+			tmp_min = ret;
+		}
+
+		/* apply constraints */
+		ret = regulator_check_voltage(c_rdevs[i], &tmp_min, &tmp_max);
+		if (ret < 0)
+			return ret;
+
+		highest_min_uV = max(highest_min_uV, tmp_min);
+
+		if (i == 0) {
+			desired_min_uV = tmp_min;
+			desired_max_uV = tmp_max;
+		}
+	}
+
+	max_spread = constraints->max_spread[0];
+
+	/*
+	 * Let target_uV be equal to the desired one if possible.
+	 * If not, set it to minimum voltage, allowed by other coupled
+	 * regulators.
+	 */
+	target_uV = max(desired_min_uV, highest_min_uV - max_spread);
+
+	/*
+	 * Find min and max voltages, which currently aren't violating
+	 * max_spread.
+	 */
+	for (i = 1; i < n_coupled; i++) {
+		int tmp_act;
+
+		tmp_act = regulator_get_voltage_rdev(c_rdevs[i]);
+		if (tmp_act < 0)
+			return tmp_act;
+
+		min_current_uV = min(tmp_act, min_current_uV);
+		max_current_uV = max(tmp_act, max_current_uV);
+	}
+
+	/*
+	 * Correct target voltage, so as it currently isn't
+	 * violating max_spread
+	 */
+	possible_uV = max(target_uV, max_current_uV - max_spread);
+	possible_uV = min(possible_uV, min_current_uV + max_spread);
+
+	if (possible_uV > desired_max_uV)
+		return -EINVAL;
+
+	done = (possible_uV == target_uV);
+	desired_min_uV = possible_uV;
+
+	/* Set current_uV if wasn't done earlier in the code and if necessary */
+	if (*current_uV == -1) {
+		ret = regulator_get_voltage_rdev(rdev);
+		if (ret < 0)
+			return ret;
+		*current_uV = ret;
+	}
+
+	*min_uV = desired_min_uV;
+	*max_uV = desired_max_uV;
+
+	return done;
+}
+
+static int exynos_coupler_balance_voltage(struct regulator_coupler *coupler,
+					  struct regulator_dev *rdev,
+					  suspend_state_t state)
+{
+	struct regulator_dev **c_rdevs;
+	struct regulator_dev *best_rdev;
+	struct coupling_desc *c_desc = &rdev->coupling_desc;
+	int i, ret, n_coupled, best_min_uV, best_max_uV, best_c_rdev;
+	unsigned int delta, best_delta;
+	unsigned long c_rdev_done = 0;
+	bool best_c_rdev_done;
+
+	c_rdevs = c_desc->coupled_rdevs;
+	n_coupled = c_desc->n_coupled;
+
+	/*
+	 * Find the best possible voltage change on each loop. Leave the loop
+	 * if there isn't any possible change.
+	 */
+	do {
+		best_c_rdev_done = false;
+		best_delta = 0;
+		best_min_uV = 0;
+		best_max_uV = 0;
+		best_c_rdev = 0;
+		best_rdev = NULL;
+
+		/*
+		 * Find highest difference between optimal voltage
+		 * and current voltage.
+		 */
+		for (i = 0; i < n_coupled; i++) {
+			/*
+			 * optimal_uV is the best voltage that can be set for
+			 * i-th regulator at the moment without violating
+			 * max_spread constraint in order to balance
+			 * the coupled voltages.
+			 */
+			int optimal_uV = 0, optimal_max_uV = 0, current_uV = 0;
+
+			if (test_bit(i, &c_rdev_done))
+				continue;
+
+			ret = regulator_get_optimal_voltage(c_rdevs[i],
+							    &current_uV,
+							    &optimal_uV,
+							    &optimal_max_uV,
+							    state);
+			if (ret < 0)
+				goto out;
+
+			delta = abs(optimal_uV - current_uV);
+
+			if (delta && best_delta <= delta) {
+				best_c_rdev_done = ret;
+				best_delta = delta;
+				best_rdev = c_rdevs[i];
+				best_min_uV = optimal_uV;
+				best_max_uV = optimal_max_uV;
+				best_c_rdev = i;
+			}
+		}
+
+		/* Nothing to change, return successfully */
+		if (!best_rdev) {
+			ret = 0;
+			goto out;
+		}
+
+		ret = regulator_set_voltage_rdev(best_rdev, best_min_uV,
+						 best_max_uV, state);
+
+		if (ret < 0)
+			goto out;
+
+		if (best_c_rdev_done)
+			set_bit(best_c_rdev, &c_rdev_done);
+
+	} while (n_coupled > 1);
+
+out:
+	return ret;
+}
+
+static int exynos_coupler_attach(struct regulator_coupler *coupler,
+				 struct regulator_dev *rdev)
+{
+	return 0;
+}
+
+static struct regulator_coupler exynos_coupler = {
+	.attach_regulator = exynos_coupler_attach,
+	.balance_voltage  = exynos_coupler_balance_voltage,
+};
+
+static int __init exynos_coupler_init(void)
+{
+	if (!of_machine_is_compatible("samsung,exynos5800"))
+		return 0;
+
+	return regulator_coupler_register(&exynos_coupler);
+}
+arch_initcall(exynos_coupler_init);
-- 
2.17.1


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