[PATCH v7 0/7] Add support for LUT PPG

[PATCH v7 0/7] Add support for LUT PPG

[Anjelique Melendez]

In certain PMICs, LUT pattern and LPG configuration is stored in SDAM
modules instead of LUT peripheral. This feature is called PPG.

This change series adds support for PPG. Thanks!
Changes since v6:
  - Patch 2/7
    - Removed required by constraint on PPG dt properties
Changes since v5:
  - Patch 4/7
    - Update logic so that multicolor led device triggers pattern
      on all LEDs at the same time
    - Update nitpicks from Lee
  - Patch 5/7
    - Update nitpicks from Lee
Changes since v4:
  - Patch 3/7
    - Get rid of r/w helpers
    - Use regmap_read_poll_timeout() in qcom_pbs_wait_for_ack()
    - Update error path in qcom_pbs_trigger_event()
    - Fix reverse christmas tree
  - Patch 4/7
    - Get rid of r/w helpers
    - Update variables to use "sdam" instead of "nvmem"
    - Fix comments
    - Fix reverse christmas tree
    - Update lpg_pattern_set() logic
  - Patch 5/7
    - Removed sdam_lut_base from lpg_data
Changes since v3:
  - Patch 4/7
    - Fix function returns
    - Move register definition to top of file
    - Revert max_brightness and probe accidental changes
    - Combine init_sdam() and parse_sdam()
    - Change error prints in probe to use dev_err_probe
    - Remove ppg_en variable
    - Update when pbs triggers are set/cleared
  - Patch 6/7
    - Remove use of nvmem_count
    - Move register definition to top of file
    - Remove lpg_get_sdam_lut_idx()
Changes since v2:
  - Patch 1/7
    - Fix dt_binding_check error
    - Rename binding file to match compatible
    - Iclude SoC specific comptaibles
  - Patch 2/7
    - Update nvmem-names list
  - Patch 3/7
    - Update EXPORT_SYMBOL to EXPORT_SYMBOL_GPL
    - Fix return/break logic in qcom_pbs_wait_for_ack()
    - Update iterators to be int
    - Add constants
    - Fix function calls in qcom_pbs_trigger_event()
    - Remove unnessary comments
    - Return -EPROBE_DEFER from get_pbs_client_device()
Changes since v1:
  - Patch 1/7
    - Fix dt_binding_check errors
    - Update binding description
  - Path 2/7
    - Fix dt_binding_check errors
    - Update per variant constraints
    - Update nvmem description
  - Patch 3/7
    - Update get_pbs_client_device()
    - Drop use of printk
    - Remove unused function

Anjelique Melendez (7):
  dt-bindings: soc: qcom: Add qcom,pbs bindings
  dt-bindings: leds: leds-qcom-lpg: Add support for LPG PPG
  soc: qcom: add QCOM PBS driver
  leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM
  leds: rgb: leds-qcom-lpg: Update PMI632 lpg_data to support PPG
  leds: rgb: leds-qcom-lpg: Include support for PPG with dedicated LUT
    SDAM
  leds: rgb: Update PM8350C lpg_data to support two-nvmem PPG Scheme

 .../bindings/leds/leds-qcom-lpg.yaml          |  82 ++++-
 .../bindings/soc/qcom/qcom,pbs.yaml           |  46 +++
 drivers/leds/rgb/leds-qcom-lpg.c              | 344 ++++++++++++++++--
 drivers/soc/qcom/Kconfig                      |   9 +
 drivers/soc/qcom/Makefile                     |   1 +
 drivers/soc/qcom/qcom-pbs.c                   | 243 +++++++++++++
 include/linux/soc/qcom/qcom-pbs.h             |  30 ++
 7 files changed, 726 insertions(+), 29 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,pbs.yaml
 create mode 100644 drivers/soc/qcom/qcom-pbs.c
 create mode 100644 include/linux/soc/qcom/qcom-pbs.h

-- 
2.41.0

[PATCH v7 1/7] dt-bindings: soc: qcom: Add qcom,pbs bindings

[Anjelique Melendez]

Add binding for the Qualcomm Programmable Boot Sequencer device.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../bindings/soc/qcom/qcom,pbs.yaml           | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,pbs.yaml

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,pbs.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,pbs.yaml
new file mode 100644
index 000000000000..b502ca72266a
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,pbs.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/qcom/qcom,pbs.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies, Inc. Programmable Boot Sequencer
+
+maintainers:
+  - Anjelique Melendez <quic_amelende@quicinc.com>
+
+description: |
+  The Qualcomm Technologies, Inc. Programmable Boot Sequencer (PBS)
+  supports triggering power up and power down sequences for clients
+  upon request.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,pmi632-pbs
+      - const: qcom,pbs
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+
+    pmic@0 {
+      reg = <0x0 SPMI_USID>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      pbs@7400 {
+        compatible = "qcom,pmi632-pbs", "qcom,pbs";
+        reg = <0x7400>;
+      };
+    };
-- 
2.41.0

[PATCH v7 2/7] dt-bindings: leds: leds-qcom-lpg: Add support for LPG PPG

[Anjelique Melendez]

Update leds-qcom-lpg binding to support LPG PPG.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
---
 .../bindings/leds/leds-qcom-lpg.yaml          | 82 ++++++++++++++++++-
 1 file changed, 81 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
index ea84ad426df1..6649ca2ec805 100644
--- a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
+++ b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
@@ -11,7 +11,7 @@ maintainers:
 
 description: >
   The Qualcomm Light Pulse Generator consists of three different hardware blocks;
-  a ramp generator with lookup table, the light pulse generator and a three
+  a ramp generator with lookup table (LUT), the light pulse generator and a three
   channel current sink. These blocks are found in a wide range of Qualcomm PMICs.
 
 properties:
@@ -63,6 +63,29 @@ properties:
         - description: dtest line to attach
         - description: flags for the attachment
 
+  nvmem:
+    description: >
+      This property is required for PMICs that supports PPG, which is when a
+      PMIC stores LPG per-channel data and pattern LUT in SDAM modules instead
+      of in a LUT peripheral. For PMICs, such as PM8350C, per-channel data
+      and pattern LUT is separated into 2 SDAM modules. In that case, phandles
+      to both SDAM modules need to be specified.
+    minItems: 1
+    maxItems: 2
+
+  nvmem-names:
+    minItems: 1
+    items:
+      - const: lpg_chan_sdam
+      - const: lut_sdam
+
+  qcom,pbs:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: >
+      Phandle of the Qualcomm Programmable Boot Sequencer node (PBS).
+      PBS node is used to trigger LPG pattern sequences for PMICs that support
+      single SDAM PPG.
+
   multi-led:
     type: object
     $ref: leds-class-multicolor.yaml#
@@ -106,6 +129,32 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,pmi632-lpg
+    then:
+      properties:
+        nvmem:
+          maxItems: 1
+        nvmem-names:
+          maxItems: 1
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,pm8350c-pwm
+              - qcom,pm8550-pwm
+    then:
+      properties:
+        nvmem:
+          minItems: 2
+        nvmem-names:
+          minItems: 2
+
 examples:
   - |
     #include <dt-bindings/leds/common.h>
@@ -191,4 +240,35 @@ examples:
       compatible = "qcom,pm8916-pwm";
       #pwm-cells = <2>;
     };
+  - |
+    #include <dt-bindings/leds/common.h>
+
+    led-controller {
+      compatible = "qcom,pmi632-lpg";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      #pwm-cells = <2>;
+      nvmem-names = "lpg_chan_sdam";
+      nvmem = <&pmi632_sdam_7>;
+      qcom,pbs = <&pmi632_pbs_client3>;
+
+      led@1 {
+        reg = <1>;
+        color = <LED_COLOR_ID_RED>;
+        label = "red";
+      };
+
+      led@2 {
+        reg = <2>;
+        color = <LED_COLOR_ID_GREEN>;
+        label = "green";
+      };
+
+      led@3 {
+        reg = <3>;
+        color = <LED_COLOR_ID_BLUE>;
+        label = "blue";
+      };
+    };
+
 ...
-- 
2.41.0

[PATCH v7 3/7] soc: qcom: add QCOM PBS driver

[Anjelique Melendez]

Add the Qualcomm PBS (Programmable Boot Sequencer) driver. The QCOM PBS
driver supports configuring software PBS trigger events through PBS RAM
on Qualcomm Technologies, Inc (QTI) PMICs.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
---
 drivers/soc/qcom/Kconfig          |   9 ++
 drivers/soc/qcom/Makefile         |   1 +
 drivers/soc/qcom/qcom-pbs.c       | 243 ++++++++++++++++++++++++++++++
 include/linux/soc/qcom/qcom-pbs.h |  30 ++++
 4 files changed, 283 insertions(+)
 create mode 100644 drivers/soc/qcom/qcom-pbs.c
 create mode 100644 include/linux/soc/qcom/qcom-pbs.h

diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index b3634e10f6f5..52aa58b02e72 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -254,4 +254,13 @@ config QCOM_INLINE_CRYPTO_ENGINE
 	tristate
 	select QCOM_SCM
 
+config QCOM_PBS
+	tristate "PBS trigger support for Qualcomm Technologies, Inc. PMICS"
+	depends on SPMI
+	help
+	  This driver supports configuring software programmable boot sequencer (PBS)
+	  trigger event through PBS RAM on Qualcomm Technologies, Inc. PMICs.
+	  This module provides the APIs to the client drivers that wants to send the
+	  PBS trigger event to the PBS RAM.
+
 endmenu
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index bbca2e1e55bb..49bb86b0fe33 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -32,3 +32,4 @@ obj-$(CONFIG_QCOM_KRYO_L2_ACCESSORS) +=	kryo-l2-accessors.o
 obj-$(CONFIG_QCOM_ICC_BWMON)	+= icc-bwmon.o
 qcom_ice-objs			+= ice.o
 obj-$(CONFIG_QCOM_INLINE_CRYPTO_ENGINE)	+= qcom_ice.o
+obj-$(CONFIG_QCOM_PBS) +=	qcom-pbs.o
diff --git a/drivers/soc/qcom/qcom-pbs.c b/drivers/soc/qcom/qcom-pbs.c
new file mode 100644
index 000000000000..b49d14bb7d08
--- /dev/null
+++ b/drivers/soc/qcom/qcom-pbs.c
@@ -0,0 +1,243 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/spmi.h>
+#include <linux/soc/qcom/qcom-pbs.h>
+
+#define PBS_CLIENT_TRIG_CTL		0x42
+#define PBS_CLIENT_SW_TRIG_BIT		BIT(7)
+#define PBS_CLIENT_SCRATCH1		0x50
+#define PBS_CLIENT_SCRATCH2		0x51
+#define PBS_CLIENT_SCRATCH2_ERROR	0xFF
+
+struct pbs_dev {
+	struct device		*dev;
+	struct regmap		*regmap;
+	struct mutex		lock;
+	struct device_link	*link;
+
+	u32			base;
+};
+
+static int qcom_pbs_wait_for_ack(struct pbs_dev *pbs, u8 bit_pos)
+{
+	int ret, retries = 2000, delay = 1100;
+	unsigned int val;
+
+	ret = regmap_read_poll_timeout(pbs->regmap,  pbs->base + PBS_CLIENT_SCRATCH2,
+					val, val & BIT(bit_pos), delay, delay * retries);
+
+	if (ret < 0) {
+		dev_err(pbs->dev, "Timeout for PBS ACK/NACK for bit %u\n", bit_pos);
+		return -ETIMEDOUT;
+	}
+
+	if (val == PBS_CLIENT_SCRATCH2_ERROR) {
+		ret = regmap_write(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH2, 0);
+		dev_err(pbs->dev, "NACK from PBS for bit %u\n", bit_pos);
+		return -EINVAL;
+	}
+
+	dev_dbg(pbs->dev, "PBS sequence for bit %u executed!\n", bit_pos);
+	return 0;
+}
+
+/**
+ * qcom_pbs_trigger_event() - Trigger the PBS RAM sequence
+ * @pbs: Pointer to PBS device
+ * @bitmap: bitmap
+ *
+ * This function is used to trigger the PBS RAM sequence to be
+ * executed by the client driver.
+ *
+ * The PBS trigger sequence involves
+ * 1. setting the PBS sequence bit in PBS_CLIENT_SCRATCH1
+ * 2. Initiating the SW PBS trigger
+ * 3. Checking the equivalent bit in PBS_CLIENT_SCRATCH2 for the
+ *    completion of the sequence.
+ * 4. If PBS_CLIENT_SCRATCH2 == 0xFF, the PBS sequence failed to execute
+ *
+ * Returns: 0 on success, < 0 on failure
+ */
+int qcom_pbs_trigger_event(struct pbs_dev *pbs, u8 bitmap)
+{
+	unsigned int val;
+	u16 bit_pos;
+	int ret;
+
+	if (!bitmap) {
+		dev_err(pbs->dev, "Invalid bitmap passed by client\n");
+		return -EINVAL;
+	}
+
+	if (IS_ERR_OR_NULL(pbs))
+		return -EINVAL;
+
+	mutex_lock(&pbs->lock);
+	ret = regmap_read(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH2, &val);
+	if (ret < 0)
+		goto out;
+
+	if (val == PBS_CLIENT_SCRATCH2_ERROR) {
+		/* PBS error - clear SCRATCH2 register */
+		ret = regmap_write(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH2, 0);
+		if (ret < 0)
+			goto out;
+	}
+
+	for (bit_pos = 0; bit_pos < 8; bit_pos++) {
+		if (!(bitmap & BIT(bit_pos)))
+			continue;
+
+		/* Clear the PBS sequence bit position */
+		ret = regmap_update_bits(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH2,
+					BIT(bit_pos), 0);
+		if (ret < 0)
+			goto error;
+
+		/* Set the PBS sequence bit position */
+		ret = regmap_update_bits(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH1,
+					BIT(bit_pos), BIT(bit_pos));
+		if (ret < 0)
+			goto error;
+
+		/* Initiate the SW trigger */
+		ret = regmap_update_bits(pbs->regmap, pbs->base + PBS_CLIENT_TRIG_CTL,
+					PBS_CLIENT_SW_TRIG_BIT, PBS_CLIENT_SW_TRIG_BIT);
+		if (ret < 0)
+			goto error;
+
+		ret = qcom_pbs_wait_for_ack(pbs, bit_pos);
+		if (ret < 0)
+			goto error;
+
+		/* Clear the PBS sequence bit position */
+		ret = regmap_update_bits(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH1,
+					BIT(bit_pos), 0);
+		if (ret < 0)
+			goto error;
+
+		/* Clear the PBS sequence bit position */
+		ret = regmap_update_bits(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH2,
+					BIT(bit_pos), 0);
+		if (ret < 0)
+			goto error;
+	}
+
+error:
+	/* Clear all the requested bitmap */
+	ret = regmap_update_bits(pbs->regmap, pbs->base + PBS_CLIENT_SCRATCH1, bitmap, 0);
+
+out:
+	mutex_unlock(&pbs->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_pbs_trigger_event);
+
+/**
+ * get_pbs_client_device() - Get the PBS device used by client
+ * @dev: Client device
+ *
+ * This function is used to get the PBS device that is being
+ * used by the client.
+ *
+ * Returns: pbs_dev on success, ERR_PTR on failure
+ */
+struct pbs_dev *get_pbs_client_device(struct device *dev)
+{
+	struct device_node *pbs_dev_node;
+	struct platform_device *pdev;
+	struct pbs_dev *pbs;
+
+	pbs_dev_node = of_parse_phandle(dev->of_node, "qcom,pbs", 0);
+	if (!pbs_dev_node) {
+		dev_err(dev, "Missing qcom,pbs property\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	pdev = of_find_device_by_node(pbs_dev_node);
+	if (!pdev) {
+		dev_err(dev, "Unable to find PBS dev_node\n");
+		pbs = ERR_PTR(-EPROBE_DEFER);
+		goto out;
+	}
+
+	pbs = platform_get_drvdata(pdev);
+	if (!pbs) {
+		dev_err(dev, "Cannot get pbs instance from %s\n", dev_name(&pdev->dev));
+		platform_device_put(pdev);
+		pbs = ERR_PTR(-EPROBE_DEFER);
+		goto out;
+	}
+
+	pbs->link = device_link_add(dev, &pdev->dev, DL_FLAG_AUTOREMOVE_SUPPLIER);
+	if (!pbs->link) {
+		dev_err(&pdev->dev, "Failed to create device link to consumer %s\n", dev_name(dev));
+		platform_device_put(pdev);
+		pbs = ERR_PTR(-EINVAL);
+		goto out;
+	}
+
+out:
+	of_node_put(pbs_dev_node);
+	return pbs;
+}
+EXPORT_SYMBOL_GPL(get_pbs_client_device);
+
+static int qcom_pbs_probe(struct platform_device *pdev)
+{
+	struct pbs_dev *pbs;
+	u32 val;
+	int ret;
+
+	pbs = devm_kzalloc(&pdev->dev, sizeof(*pbs), GFP_KERNEL);
+	if (!pbs)
+		return -ENOMEM;
+
+	pbs->dev = &pdev->dev;
+	pbs->regmap = dev_get_regmap(pbs->dev->parent, NULL);
+	if (!pbs->regmap) {
+		dev_err(pbs->dev, "Couldn't get parent's regmap\n");
+		return -EINVAL;
+	}
+
+	ret = device_property_read_u32(pbs->dev, "reg", &val);
+	if (ret < 0) {
+		dev_err(pbs->dev, "Couldn't find reg, ret = %d\n", ret);
+		return ret;
+	}
+	pbs->base = val;
+	mutex_init(&pbs->lock);
+
+	platform_set_drvdata(pdev, pbs);
+
+	return 0;
+}
+
+static const struct of_device_id qcom_pbs_match_table[] = {
+	{ .compatible = "qcom,pbs" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, qcom_pbs_match_table);
+
+static struct platform_driver qcom_pbs_driver = {
+	.driver = {
+		.name		= "qcom-pbs",
+		.of_match_table	= qcom_pbs_match_table,
+	},
+	.probe = qcom_pbs_probe,
+};
+module_platform_driver(qcom_pbs_driver)
+
+MODULE_DESCRIPTION("QCOM PBS DRIVER");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/soc/qcom/qcom-pbs.h b/include/linux/soc/qcom/qcom-pbs.h
new file mode 100644
index 000000000000..8a46209ccf13
--- /dev/null
+++ b/include/linux/soc/qcom/qcom-pbs.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#ifndef _QCOM_PBS_H
+#define _QCOM_PBS_H
+
+#include <linux/errno.h>
+#include <linux/types.h>
+
+struct device_node;
+struct pbs_dev;
+
+#if IS_ENABLED(CONFIG_QCOM_PBS)
+int qcom_pbs_trigger_event(struct pbs_dev *pbs, u8 bitmap);
+struct pbs_dev *get_pbs_client_device(struct device *client_dev);
+#else
+static inline int qcom_pbs_trigger_event(struct pbs_dev *pbs, u8 bitmap)
+{
+	return -ENODEV;
+}
+
+static inline struct pbs_dev *get_pbs_client_device(struct device *client_dev)
+{
+	return ERR_PTR(-ENODEV);
+}
+#endif
+
+#endif
-- 
2.41.0

[PATCH v7 4/7] leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM

[Anjelique Melendez]

In some PMICs like pmi632, the pattern look up table (LUT) and LPG
configuration is stored in a single SDAM module instead of LUT
peripheral. This feature is called PPG. PPG uses Qualcomm Programmable
Boot Sequencer (PBS) inorder to trigger pattern sequences for PMICs.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Tested-by: Luca Weiss <luca.weiss@fairphone.com>
---
 drivers/leds/rgb/leds-qcom-lpg.c | 264 ++++++++++++++++++++++++++++---
 1 file changed, 242 insertions(+), 22 deletions(-)

diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
index 68d82a682bf6..a3e4adffb8df 100644
--- a/drivers/leds/rgb/leds-qcom-lpg.c
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -8,11 +8,13 @@
 #include <linux/bitfield.h>
 #include <linux/led-class-multicolor.h>
 #include <linux/module.h>
+#include <linux/nvmem-consumer.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pwm.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
+#include <linux/soc/qcom/qcom-pbs.h>
 
 #define LPG_SUBTYPE_REG		0x05
 #define  LPG_SUBTYPE_LPG	0x2
@@ -39,6 +41,8 @@
 #define PWM_SEC_ACCESS_REG	0xd0
 #define PWM_DTEST_REG(x)	(0xe2 + (x) - 1)
 
+#define SDAM_REG_PBS_SEQ_EN		0x42
+
 #define TRI_LED_SRC_SEL		0x45
 #define TRI_LED_EN_CTL		0x46
 #define TRI_LED_ATC_CTL		0x47
@@ -48,9 +52,25 @@
 
 #define LPG_RESOLUTION_9BIT	BIT(9)
 #define LPG_RESOLUTION_15BIT	BIT(15)
+#define PPG_MAX_LED_BRIGHTNESS	255
+
 #define LPG_MAX_M		7
 #define LPG_MAX_PREDIV		6
 
+#define DEFAULT_TICK_DURATION_US	7800
+#define RAMP_STEP_DURATION(x)		(((x) * 1000 / DEFAULT_TICK_DURATION_US) & 0xff)
+
+/* LPG common config settings for PPG */
+#define SDAM_REG_RAMP_STEP_DURATION		0x47
+#define SDAM_LPG_SDAM_LUT_PATTERN_OFFSET	0x80
+
+/* LPG per channel config settings for PPG */
+#define SDAM_LUT_EN_OFFSET			0x0
+#define SDAM_PATTERN_CONFIG_OFFSET		0x1
+#define SDAM_END_INDEX_OFFSET			0x3
+#define SDAM_START_INDEX_OFFSET		0x4
+#define SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET	0x6
+
 struct lpg_channel;
 struct lpg_data;
 
@@ -64,6 +84,9 @@ struct lpg_data;
  * @lut_base:	base address of the LUT block (optional)
  * @lut_size:	number of entries in the LUT block
  * @lut_bitmap:	allocation bitmap for LUT entries
+ * @pbs_dev:	PBS device
+ * @lpg_chan_sdam:	LPG SDAM peripheral device
+ * @pbs_en_bitmap:	bitmap for tracking PBS triggers
  * @triled_base: base address of the TRILED block (optional)
  * @triled_src:	power-source for the TRILED
  * @triled_has_atc_ctl:	true if there is TRI_LED_ATC_CTL register
@@ -85,6 +108,10 @@ struct lpg {
 	u32 lut_size;
 	unsigned long *lut_bitmap;
 
+	struct pbs_dev *pbs_dev;
+	struct nvmem_device *lpg_chan_sdam;
+	unsigned long pbs_en_bitmap;
+
 	u32 triled_base;
 	u32 triled_src;
 	bool triled_has_atc_ctl;
@@ -101,6 +128,7 @@ struct lpg {
  * @triled_mask: mask in TRILED to enable this channel
  * @lut_mask:	mask in LUT to start pattern generator for this channel
  * @subtype:	PMIC hardware block subtype
+ * @sdam_offset:	channel offset in LPG SDAM
  * @in_use:	channel is exposed to LED framework
  * @color:	color of the LED attached to this channel
  * @dtest_line:	DTEST line for output, or 0 if disabled
@@ -129,6 +157,7 @@ struct lpg_channel {
 	unsigned int triled_mask;
 	unsigned int lut_mask;
 	unsigned int subtype;
+	u32 sdam_offset;
 
 	bool in_use;
 
@@ -178,10 +207,12 @@ struct lpg_led {
 
 /**
  * struct lpg_channel_data - per channel initialization data
+ * @sdam_offset:	Channel offset in LPG SDAM
  * @base:		base address for PWM channel registers
  * @triled_mask:	bitmask for controlling this channel in TRILED
  */
 struct lpg_channel_data {
+	unsigned int sdam_offset;
 	unsigned int base;
 	u8 triled_mask;
 };
@@ -206,6 +237,52 @@ struct lpg_data {
 	const struct lpg_channel_data *channels;
 };
 
+#define PBS_SW_TRIG_BIT		BIT(0)
+
+static int lpg_clear_pbs_trigger(struct lpg *lpg, unsigned int lut_mask)
+{
+	u8 val = 0;
+	int rc;
+
+	lpg->pbs_en_bitmap &= (~lut_mask);
+	if (!lpg->pbs_en_bitmap) {
+		rc = nvmem_device_write(lpg->lpg_chan_sdam, SDAM_REG_PBS_SEQ_EN, 1, &val);
+		if (rc < 0)
+			return rc;
+	}
+
+	return 0;
+}
+
+static int lpg_set_pbs_trigger(struct lpg *lpg, unsigned int lut_mask)
+{
+	u8 val = PBS_SW_TRIG_BIT;
+	int rc;
+
+	if (!lpg->pbs_en_bitmap) {
+		rc = nvmem_device_write(lpg->lpg_chan_sdam, SDAM_REG_PBS_SEQ_EN, 1, &val);
+		if (rc < 0)
+			return rc;
+
+		rc = qcom_pbs_trigger_event(lpg->pbs_dev, val);
+		if (rc < 0)
+			return rc;
+	}
+	lpg->pbs_en_bitmap |= lut_mask;
+
+	return 0;
+}
+
+static int lpg_sdam_configure_triggers(struct lpg_channel *chan, u8 set_trig)
+{
+	u32 addr = SDAM_LUT_EN_OFFSET + chan->sdam_offset;
+
+	if (!chan->lpg->lpg_chan_sdam)
+		return 0;
+
+	return nvmem_device_write(chan->lpg->lpg_chan_sdam, addr, 1, &set_trig);
+}
+
 static int triled_set(struct lpg *lpg, unsigned int mask, unsigned int enable)
 {
 	/* Skip if we don't have a triled block */
@@ -216,6 +293,40 @@ static int triled_set(struct lpg *lpg, unsigned int mask, unsigned int enable)
 				  mask, enable);
 }
 
+static int lpg_lut_store_sdam(struct lpg *lpg, struct led_pattern *pattern,
+			 size_t len, unsigned int *lo_idx, unsigned int *hi_idx)
+{
+	unsigned int idx;
+	u8 brightness;
+	int i, rc;
+	u16 addr;
+
+	if (len > lpg->lut_size) {
+		dev_err(lpg->dev, "Pattern length (%zu) exceeds maximum pattern length (%d)\n",
+			len, lpg->lut_size);
+		return -EINVAL;
+	}
+
+	idx = bitmap_find_next_zero_area(lpg->lut_bitmap, lpg->lut_size, 0, len, 0);
+	if (idx >= lpg->lut_size)
+		return -ENOSPC;
+
+	for (i = 0; i < len; i++) {
+		brightness = pattern[i].brightness;
+		addr = SDAM_LPG_SDAM_LUT_PATTERN_OFFSET + i + idx;
+		rc = nvmem_device_write(lpg->lpg_chan_sdam, addr, 1, &brightness);
+		if (rc < 0)
+			return rc;
+	}
+
+	bitmap_set(lpg->lut_bitmap, idx, len);
+
+	*lo_idx = idx;
+	*hi_idx = idx + len - 1;
+
+	return 0;
+}
+
 static int lpg_lut_store(struct lpg *lpg, struct led_pattern *pattern,
 			 size_t len, unsigned int *lo_idx, unsigned int *hi_idx)
 {
@@ -256,6 +367,9 @@ static void lpg_lut_free(struct lpg *lpg, unsigned int lo_idx, unsigned int hi_i
 
 static int lpg_lut_sync(struct lpg *lpg, unsigned int mask)
 {
+	if (!lpg->lut_base)
+		return 0;
+
 	return regmap_write(lpg->map, lpg->lut_base + RAMP_CONTROL_REG, mask);
 }
 
@@ -462,6 +576,28 @@ static void lpg_apply_pwm_value(struct lpg_channel *chan)
 #define LPG_PATTERN_CONFIG_PAUSE_HI	BIT(1)
 #define LPG_PATTERN_CONFIG_PAUSE_LO	BIT(0)
 
+static void lpg_sdam_apply_lut_control(struct lpg_channel *chan)
+{
+	struct nvmem_device *lpg_chan_sdam = chan->lpg->lpg_chan_sdam;
+	unsigned int lo_idx = chan->pattern_lo_idx;
+	unsigned int hi_idx = chan->pattern_hi_idx;
+	u8 val = 0, conf = 0;
+
+	if (!chan->ramp_enabled || chan->pattern_lo_idx == chan->pattern_hi_idx)
+		return;
+
+	if (!chan->ramp_oneshot)
+		conf |= LPG_PATTERN_CONFIG_REPEAT;
+
+	nvmem_device_write(lpg_chan_sdam, SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET + chan->sdam_offset, 1, &val);
+	nvmem_device_write(lpg_chan_sdam, SDAM_PATTERN_CONFIG_OFFSET + chan->sdam_offset, 1, &conf);
+	nvmem_device_write(lpg_chan_sdam, SDAM_END_INDEX_OFFSET + chan->sdam_offset, 1, &hi_idx);
+	nvmem_device_write(lpg_chan_sdam, SDAM_START_INDEX_OFFSET + chan->sdam_offset, 1, &lo_idx);
+
+	val = RAMP_STEP_DURATION(chan->ramp_tick_ms);
+	nvmem_device_write(lpg_chan_sdam, SDAM_REG_RAMP_STEP_DURATION, 1, &val);
+}
+
 static void lpg_apply_lut_control(struct lpg_channel *chan)
 {
 	struct lpg *lpg = chan->lpg;
@@ -597,7 +733,10 @@ static void lpg_apply(struct lpg_channel *chan)
 	lpg_apply_pwm_value(chan);
 	lpg_apply_control(chan);
 	lpg_apply_sync(chan);
-	lpg_apply_lut_control(chan);
+	if (chan->lpg->lpg_chan_sdam)
+		lpg_sdam_apply_lut_control(chan);
+	else
+		lpg_apply_lut_control(chan);
 	lpg_enable_glitch(chan);
 }
 
@@ -622,6 +761,7 @@ static void lpg_brightness_set(struct lpg_led *led, struct led_classdev *cdev,
 			chan->ramp_enabled = false;
 		} else if (chan->pattern_lo_idx != chan->pattern_hi_idx) {
 			lpg_calc_freq(chan, NSEC_PER_MSEC);
+			lpg_sdam_configure_triggers(chan, 1);
 
 			chan->enabled = true;
 			chan->ramp_enabled = true;
@@ -649,8 +789,10 @@ static void lpg_brightness_set(struct lpg_led *led, struct led_classdev *cdev,
 		triled_set(lpg, triled_mask, triled_enabled);
 
 	/* Trigger start of ramp generator(s) */
-	if (lut_mask)
+	if (lut_mask) {
 		lpg_lut_sync(lpg, lut_mask);
+		lpg_set_pbs_trigger(lpg, lut_mask);
+	}
 }
 
 static int lpg_brightness_single_set(struct led_classdev *cdev,
@@ -836,18 +978,23 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
 	 * If the specified pattern is a palindrome the ping pong mode is
 	 * enabled. In this scenario the delta_t of the middle entry (i.e. the
 	 * last in the programmed pattern) determines the "high pause".
+	 *
+	 * SDAM-based devices do not support "ping-pong", "low pause" or "high pause"
 	 */
 
 	/* Detect palindromes and use "ping pong" to reduce LUT usage */
-	for (i = 0; i < len / 2; i++) {
-		brightness_a = pattern[i].brightness;
-		brightness_b = pattern[len - i - 1].brightness;
-
-		if (brightness_a != brightness_b) {
-			ping_pong = false;
-			break;
+	if (lpg->lut_base) {
+		for (i = 0; i < len / 2; i++) {
+			brightness_a = pattern[i].brightness;
+			brightness_b = pattern[len - i - 1].brightness;
+
+			if (brightness_a != brightness_b) {
+				ping_pong = false;
+				break;
+			}
 		}
-	}
+	} else
+		ping_pong = false;
 
 	/* The pattern length to be written to the LUT */
 	if (ping_pong)
@@ -875,12 +1022,26 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
 	if (delta_t >= BIT(9))
 		goto out_free_pattern;
 
-	/* Find "low pause" and "high pause" in the pattern */
-	lo_pause = pattern[0].delta_t;
-	hi_pause = pattern[actual_len - 1].delta_t;
+	/*
+	 * Find "low pause" and "high pause" in the pattern in the LUT case.
+	 * SDAM-based devices require equal duration of all steps
+	 */
+	if (lpg->lut_base) {
+		lo_pause = pattern[0].delta_t;
+		hi_pause = pattern[actual_len - 1].delta_t;
+	} else {
+		if (delta_t != pattern[0].delta_t || delta_t != pattern[actual_len - 1].delta_t)
+			goto out_free_pattern;
+	}
+
 
 	mutex_lock(&lpg->lock);
-	ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx);
+
+	if (lpg->lut_base)
+		ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx);
+	else
+		ret = lpg_lut_store_sdam(lpg, pattern, actual_len, &lo_idx, &hi_idx);
+
 	if (ret < 0)
 		goto out_unlock;
 
@@ -928,7 +1089,12 @@ static int lpg_pattern_mc_set(struct led_classdev *cdev,
 {
 	struct led_classdev_mc *mc = lcdev_to_mccdev(cdev);
 	struct lpg_led *led = container_of(mc, struct lpg_led, mcdev);
-	int ret;
+	unsigned int triled_mask = 0;
+	int ret, i;
+
+	for (i = 0; i < led->num_channels; i++)
+		triled_mask |= led->channels[i]->triled_mask;
+	triled_set(led->lpg, triled_mask, 0);
 
 	ret = lpg_pattern_set(led, pattern, len, repeat);
 	if (ret < 0)
@@ -953,6 +1119,8 @@ static int lpg_pattern_clear(struct lpg_led *led)
 
 	for (i = 0; i < led->num_channels; i++) {
 		chan = led->channels[i];
+		lpg_sdam_configure_triggers(chan, 0);
+		lpg_clear_pbs_trigger(chan->lpg, chan->lut_mask);
 		chan->pattern_lo_idx = 0;
 		chan->pattern_hi_idx = 0;
 	}
@@ -1187,8 +1355,8 @@ static int lpg_add_led(struct lpg *lpg, struct device_node *np)
 		cdev->brightness_set_blocking = lpg_brightness_mc_set;
 		cdev->blink_set = lpg_blink_mc_set;
 
-		/* Register pattern accessors only if we have a LUT block */
-		if (lpg->lut_base) {
+		/* Register pattern accessors if we have a LUT block or when using PPG */
+		if (lpg->lut_base || lpg->lpg_chan_sdam) {
 			cdev->pattern_set = lpg_pattern_mc_set;
 			cdev->pattern_clear = lpg_pattern_mc_clear;
 		}
@@ -1201,15 +1369,19 @@ static int lpg_add_led(struct lpg *lpg, struct device_node *np)
 		cdev->brightness_set_blocking = lpg_brightness_single_set;
 		cdev->blink_set = lpg_blink_single_set;
 
-		/* Register pattern accessors only if we have a LUT block */
-		if (lpg->lut_base) {
+		/* Register pattern accessors if we have a LUT block or when using PPG */
+		if (lpg->lut_base || lpg->lpg_chan_sdam) {
 			cdev->pattern_set = lpg_pattern_single_set;
 			cdev->pattern_clear = lpg_pattern_single_clear;
 		}
 	}
 
 	cdev->default_trigger = of_get_property(np, "linux,default-trigger", NULL);
-	cdev->max_brightness = LPG_RESOLUTION_9BIT - 1;
+
+	if (lpg->lpg_chan_sdam)
+		cdev->max_brightness = PPG_MAX_LED_BRIGHTNESS;
+	else
+		cdev->max_brightness = LPG_RESOLUTION_9BIT - 1;
 
 	if (!of_property_read_string(np, "default-state", &state) &&
 	    !strcmp(state, "on"))
@@ -1250,6 +1422,7 @@ static int lpg_init_channels(struct lpg *lpg)
 		chan->base = data->channels[i].base;
 		chan->triled_mask = data->channels[i].triled_mask;
 		chan->lut_mask = BIT(i);
+		chan->sdam_offset = data->channels[i].sdam_offset;
 
 		regmap_read(lpg->map, chan->base + LPG_SUBTYPE_REG, &chan->subtype);
 	}
@@ -1296,11 +1469,12 @@ static int lpg_init_lut(struct lpg *lpg)
 {
 	const struct lpg_data *data = lpg->data;
 
-	if (!data->lut_base)
+	if (!data->lut_size)
 		return 0;
 
-	lpg->lut_base = data->lut_base;
 	lpg->lut_size = data->lut_size;
+	if (data->lut_base)
+		lpg->lut_base = data->lut_base;
 
 	lpg->lut_bitmap = devm_bitmap_zalloc(lpg->dev, lpg->lut_size, GFP_KERNEL);
 	if (!lpg->lut_bitmap)
@@ -1309,6 +1483,48 @@ static int lpg_init_lut(struct lpg *lpg)
 	return 0;
 }
 
+static int lpg_init_sdam(struct lpg *lpg)
+{
+	int i, sdam_count, rc;
+	u8 val = 0;
+
+	sdam_count = of_property_count_strings(lpg->dev->of_node, "nvmem-names");
+	if (sdam_count <= 0)
+		return 0;
+
+	/* Get the SDAM device for LPG/LUT config */
+	lpg->lpg_chan_sdam = devm_nvmem_device_get(lpg->dev, "lpg_chan_sdam");
+	if (IS_ERR(lpg->lpg_chan_sdam))
+		return dev_err_probe(lpg->dev, PTR_ERR(lpg->lpg_chan_sdam),
+				"Failed to get LPG chan SDAM device\n");
+
+	lpg->pbs_dev = get_pbs_client_device(lpg->dev);
+	if (IS_ERR(lpg->pbs_dev))
+		return dev_err_probe(lpg->dev, PTR_ERR(lpg->pbs_dev),
+				"Failed to get PBS client device\n");
+
+	for (i = 0; i < lpg->num_channels; i++) {
+		struct lpg_channel *chan = &lpg->channels[i];
+
+		if (chan->sdam_offset) {
+			rc = nvmem_device_write(lpg->lpg_chan_sdam,
+				SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET + chan->sdam_offset, 1, &val);
+			if (rc < 0)
+				return rc;
+
+			rc = lpg_sdam_configure_triggers(chan, 0);
+			if (rc < 0)
+				return rc;
+
+			rc = lpg_clear_pbs_trigger(chan->lpg, chan->lut_mask);
+			if (rc < 0)
+				return rc;
+		}
+	}
+
+	return 0;
+}
+
 static int lpg_probe(struct platform_device *pdev)
 {
 	struct device_node *np;
@@ -1345,6 +1561,10 @@ static int lpg_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
+	ret = lpg_init_sdam(lpg);
+	if (ret < 0)
+		return ret;
+
 	ret = lpg_init_lut(lpg);
 	if (ret < 0)
 		return ret;
-- 
2.41.0

[PATCH v7 5/7] leds: rgb: leds-qcom-lpg: Update PMI632 lpg_data to support PPG

[Anjelique Melendez]

Update the pmi632 lpg_data struct so that pmi632 devices use PPG
for LUT pattern.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Lee Jones <lee@kernel.org>
Tested-by: Luca Weiss <luca.weiss@fairphone.com>
---
 drivers/leds/rgb/leds-qcom-lpg.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
index a3e4adffb8df..8d2647aeb3b4 100644
--- a/drivers/leds/rgb/leds-qcom-lpg.c
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -1637,11 +1637,13 @@ static const struct lpg_data pm8994_lpg_data = {
 static const struct lpg_data pmi632_lpg_data = {
 	.triled_base = 0xd000,
 
+	.lut_size = 64,
+
 	.num_channels = 5,
 	.channels = (const struct lpg_channel_data[]) {
-		{ .base = 0xb300, .triled_mask = BIT(7) },
-		{ .base = 0xb400, .triled_mask = BIT(6) },
-		{ .base = 0xb500, .triled_mask = BIT(5) },
+		{ .base = 0xb300, .triled_mask = BIT(7), .sdam_offset = 0x48 },
+		{ .base = 0xb400, .triled_mask = BIT(6), .sdam_offset = 0x56 },
+		{ .base = 0xb500, .triled_mask = BIT(5), .sdam_offset = 0x64 },
 		{ .base = 0xb600 },
 		{ .base = 0xb700 },
 	},
-- 
2.41.0

[PATCH v7 6/7] leds: rgb: leds-qcom-lpg: Include support for PPG with dedicated LUT SDAM

[Anjelique Melendez]

On PMICs such as PM8350C, the pattern lookup table (LUT) is stored in a
separate SDAM from the one where the lpg per-channel data is stored.

Add support for PPG with a dedicated LUT SDAM while maintaining backward
compatibility for those targets that use only a single SDAM.

Co-developed-by: Guru Das Srinagesh <quic_gurus@quicinc.com>
Signed-off-by: Guru Das Srinagesh <quic_gurus@quicinc.com>
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Lee Jones <lee@kernel.org>
---
 drivers/leds/rgb/leds-qcom-lpg.c | 92 +++++++++++++++++++++++++++-----
 1 file changed, 78 insertions(+), 14 deletions(-)

diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
index 8d2647aeb3b4..471b5b3e22ea 100644
--- a/drivers/leds/rgb/leds-qcom-lpg.c
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -42,6 +42,8 @@
 #define PWM_DTEST_REG(x)	(0xe2 + (x) - 1)
 
 #define SDAM_REG_PBS_SEQ_EN		0x42
+#define SDAM_PBS_TRIG_SET		0xe5
+#define SDAM_PBS_TRIG_CLR		0xe6
 
 #define TRI_LED_SRC_SEL		0x45
 #define TRI_LED_EN_CTL		0x46
@@ -60,8 +62,12 @@
 #define DEFAULT_TICK_DURATION_US	7800
 #define RAMP_STEP_DURATION(x)		(((x) * 1000 / DEFAULT_TICK_DURATION_US) & 0xff)
 
+#define SDAM_MAX_DEVICES	2
 /* LPG common config settings for PPG */
+#define SDAM_START_BASE			0x40
 #define SDAM_REG_RAMP_STEP_DURATION		0x47
+
+#define SDAM_LUT_SDAM_LUT_PATTERN_OFFSET	0x45
 #define SDAM_LPG_SDAM_LUT_PATTERN_OFFSET	0x80
 
 /* LPG per channel config settings for PPG */
@@ -70,6 +76,8 @@
 #define SDAM_END_INDEX_OFFSET			0x3
 #define SDAM_START_INDEX_OFFSET		0x4
 #define SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET	0x6
+#define SDAM_PAUSE_HI_MULTIPLIER_OFFSET	0x8
+#define SDAM_PAUSE_LO_MULTIPLIER_OFFSET	0x9
 
 struct lpg_channel;
 struct lpg_data;
@@ -86,6 +94,7 @@ struct lpg_data;
  * @lut_bitmap:	allocation bitmap for LUT entries
  * @pbs_dev:	PBS device
  * @lpg_chan_sdam:	LPG SDAM peripheral device
+ * @lut_sdam:	LUT SDAM peripheral device
  * @pbs_en_bitmap:	bitmap for tracking PBS triggers
  * @triled_base: base address of the TRILED block (optional)
  * @triled_src:	power-source for the TRILED
@@ -110,6 +119,7 @@ struct lpg {
 
 	struct pbs_dev *pbs_dev;
 	struct nvmem_device *lpg_chan_sdam;
+	struct nvmem_device *lut_sdam;
 	unsigned long pbs_en_bitmap;
 
 	u32 triled_base;
@@ -249,6 +259,13 @@ static int lpg_clear_pbs_trigger(struct lpg *lpg, unsigned int lut_mask)
 		rc = nvmem_device_write(lpg->lpg_chan_sdam, SDAM_REG_PBS_SEQ_EN, 1, &val);
 		if (rc < 0)
 			return rc;
+
+		if (lpg->lut_sdam) {
+			val = PBS_SW_TRIG_BIT;
+			rc = nvmem_device_write(lpg->lpg_chan_sdam, SDAM_PBS_TRIG_CLR, 1, &val);
+			if (rc < 0)
+				return rc;
+		}
 	}
 
 	return 0;
@@ -264,9 +281,15 @@ static int lpg_set_pbs_trigger(struct lpg *lpg, unsigned int lut_mask)
 		if (rc < 0)
 			return rc;
 
-		rc = qcom_pbs_trigger_event(lpg->pbs_dev, val);
-		if (rc < 0)
-			return rc;
+		if (lpg->lut_sdam) {
+			rc = nvmem_device_write(lpg->lpg_chan_sdam, SDAM_PBS_TRIG_SET, 1, &val);
+			if (rc < 0)
+				return rc;
+		} else {
+			rc = qcom_pbs_trigger_event(lpg->pbs_dev, val);
+			if (rc < 0)
+				return rc;
+		}
 	}
 	lpg->pbs_en_bitmap |= lut_mask;
 
@@ -313,8 +336,15 @@ static int lpg_lut_store_sdam(struct lpg *lpg, struct led_pattern *pattern,
 
 	for (i = 0; i < len; i++) {
 		brightness = pattern[i].brightness;
-		addr = SDAM_LPG_SDAM_LUT_PATTERN_OFFSET + i + idx;
-		rc = nvmem_device_write(lpg->lpg_chan_sdam, addr, 1, &brightness);
+
+		if (lpg->lut_sdam) {
+			addr = SDAM_LUT_SDAM_LUT_PATTERN_OFFSET + i + idx;
+			rc = nvmem_device_write(lpg->lut_sdam, addr, 1, &brightness);
+		} else {
+			addr = SDAM_LPG_SDAM_LUT_PATTERN_OFFSET + i + idx;
+			rc = nvmem_device_write(lpg->lpg_chan_sdam, addr, 1, &brightness);
+		}
+
 		if (rc < 0)
 			return rc;
 	}
@@ -581,13 +611,28 @@ static void lpg_sdam_apply_lut_control(struct lpg_channel *chan)
 	struct nvmem_device *lpg_chan_sdam = chan->lpg->lpg_chan_sdam;
 	unsigned int lo_idx = chan->pattern_lo_idx;
 	unsigned int hi_idx = chan->pattern_hi_idx;
-	u8 val = 0, conf = 0;
+	u8 val = 0, conf = 0, lut_offset = 0;
+	unsigned int hi_pause, lo_pause;
+	struct lpg *lpg = chan->lpg;
 
 	if (!chan->ramp_enabled || chan->pattern_lo_idx == chan->pattern_hi_idx)
 		return;
 
+	hi_pause = DIV_ROUND_UP(chan->ramp_hi_pause_ms, chan->ramp_tick_ms);
+	lo_pause = DIV_ROUND_UP(chan->ramp_lo_pause_ms, chan->ramp_tick_ms);
+
 	if (!chan->ramp_oneshot)
 		conf |= LPG_PATTERN_CONFIG_REPEAT;
+	if (chan->ramp_hi_pause_ms && lpg->lut_sdam)
+		conf |= LPG_PATTERN_CONFIG_PAUSE_HI;
+	if (chan->ramp_lo_pause_ms && lpg->lut_sdam)
+		conf |= LPG_PATTERN_CONFIG_PAUSE_LO;
+
+	if (lpg->lut_sdam) {
+		lut_offset = SDAM_LUT_SDAM_LUT_PATTERN_OFFSET - SDAM_START_BASE;
+		hi_idx += lut_offset;
+		lo_idx += lut_offset;
+	}
 
 	nvmem_device_write(lpg_chan_sdam, SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET + chan->sdam_offset, 1, &val);
 	nvmem_device_write(lpg_chan_sdam, SDAM_PATTERN_CONFIG_OFFSET + chan->sdam_offset, 1, &conf);
@@ -596,6 +641,12 @@ static void lpg_sdam_apply_lut_control(struct lpg_channel *chan)
 
 	val = RAMP_STEP_DURATION(chan->ramp_tick_ms);
 	nvmem_device_write(lpg_chan_sdam, SDAM_REG_RAMP_STEP_DURATION, 1, &val);
+
+	if (lpg->lut_sdam) {
+		nvmem_device_write(lpg_chan_sdam, SDAM_PAUSE_HI_MULTIPLIER_OFFSET + chan->sdam_offset, 1, &hi_pause);
+		nvmem_device_write(lpg_chan_sdam, SDAM_PAUSE_LO_MULTIPLIER_OFFSET + chan->sdam_offset, 1, &lo_pause);
+	}
+
 }
 
 static void lpg_apply_lut_control(struct lpg_channel *chan)
@@ -979,7 +1030,8 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
 	 * enabled. In this scenario the delta_t of the middle entry (i.e. the
 	 * last in the programmed pattern) determines the "high pause".
 	 *
-	 * SDAM-based devices do not support "ping-pong", "low pause" or "high pause"
+	 * SDAM-based devices do not support "ping pong", and only supports
+	 * "low pause" and "high pause" with a dedicated SDAM LUT.
 	 */
 
 	/* Detect palindromes and use "ping pong" to reduce LUT usage */
@@ -1024,9 +1076,10 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
 
 	/*
 	 * Find "low pause" and "high pause" in the pattern in the LUT case.
-	 * SDAM-based devices require equal duration of all steps
+	 * SDAM-based devices without dedicated LUT SDAM require equal
+	 * duration of all steps.
 	 */
-	if (lpg->lut_base) {
+	if (lpg->lut_base || lpg->lut_sdam) {
 		lo_pause = pattern[0].delta_t;
 		hi_pause = pattern[actual_len - 1].delta_t;
 	} else {
@@ -1491,17 +1544,28 @@ static int lpg_init_sdam(struct lpg *lpg)
 	sdam_count = of_property_count_strings(lpg->dev->of_node, "nvmem-names");
 	if (sdam_count <= 0)
 		return 0;
+	if (sdam_count > SDAM_MAX_DEVICES)
+		return -EINVAL;
 
-	/* Get the SDAM device for LPG/LUT config */
+	/* Get the 1st SDAM device for LPG/LUT config */
 	lpg->lpg_chan_sdam = devm_nvmem_device_get(lpg->dev, "lpg_chan_sdam");
 	if (IS_ERR(lpg->lpg_chan_sdam))
 		return dev_err_probe(lpg->dev, PTR_ERR(lpg->lpg_chan_sdam),
 				"Failed to get LPG chan SDAM device\n");
 
-	lpg->pbs_dev = get_pbs_client_device(lpg->dev);
-	if (IS_ERR(lpg->pbs_dev))
-		return dev_err_probe(lpg->dev, PTR_ERR(lpg->pbs_dev),
-				"Failed to get PBS client device\n");
+	if (sdam_count == 1) {
+		/* Get PBS device node if single SDAM device */
+		lpg->pbs_dev = get_pbs_client_device(lpg->dev);
+		if (IS_ERR(lpg->pbs_dev))
+			return dev_err_probe(lpg->dev, PTR_ERR(lpg->pbs_dev),
+					"Failed to get PBS client device\n");
+	} else if (sdam_count == 2) {
+		/* Get the 2nd SDAM device for LUT pattern */
+		lpg->lut_sdam = devm_nvmem_device_get(lpg->dev, "lut_sdam");
+		if (IS_ERR(lpg->lut_sdam))
+			return dev_err_probe(lpg->dev, PTR_ERR(lpg->lut_sdam),
+					"Failed to get LPG LUT SDAM device\n");
+	}
 
 	for (i = 0; i < lpg->num_channels; i++) {
 		struct lpg_channel *chan = &lpg->channels[i];
-- 
2.41.0

[PATCH v7 7/7] leds: rgb: Update PM8350C lpg_data to support two-nvmem PPG Scheme

[Anjelique Melendez]

Update the pm8350c lpg_data struct so that pm8350c devices are treated as
PWM devices that support two-nvmem PPG scheme.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Lee Jones <lee@kernel.org>
---
 drivers/leds/rgb/leds-qcom-lpg.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
index 471b5b3e22ea..0cb079e6e2e6 100644
--- a/drivers/leds/rgb/leds-qcom-lpg.c
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -1780,11 +1780,13 @@ static const struct lpg_data pm8150l_lpg_data = {
 static const struct lpg_data pm8350c_pwm_data = {
 	.triled_base = 0xef00,
 
+	.lut_size = 122,
+
 	.num_channels = 4,
 	.channels = (const struct lpg_channel_data[]) {
-		{ .base = 0xe800, .triled_mask = BIT(7) },
-		{ .base = 0xe900, .triled_mask = BIT(6) },
-		{ .base = 0xea00, .triled_mask = BIT(5) },
+		{ .base = 0xe800, .triled_mask = BIT(7), .sdam_offset = 0x48 },
+		{ .base = 0xe900, .triled_mask = BIT(6), .sdam_offset = 0x56 },
+		{ .base = 0xea00, .triled_mask = BIT(5), .sdam_offset = 0x64 },
 		{ .base = 0xeb00 },
 	},
 };
-- 
2.41.0

Re: [PATCH v7 2/7] dt-bindings: leds: leds-qcom-lpg: Add support for LPG PPG

[Krzysztof Kozlowski]

On 30/11/2023 02:36, Anjelique Melendez wrote:
> Update leds-qcom-lpg binding to support LPG PPG.
> 
> Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
> ---

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v7 4/7] leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM

[Dan Carpenter]

Hi Anjelique,

kernel test robot noticed the following build warnings:

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Anjelique-Melendez/dt-bindings-soc-qcom-Add-qcom-pbs-bindings/20231130-094701
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20231130013615.14287-5-quic_amelende%40quicinc.com
patch subject: [PATCH v7 4/7] leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM
config: csky-randconfig-r071-20231130 (https://download.01.org/0day-ci/archive/20231130/202311302200.RcTP9m0Y-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231130/202311302200.RcTP9m0Y-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202311302200.RcTP9m0Y-lkp@intel.com/

smatch warnings:
drivers/leds/rgb/leds-qcom-lpg.c:1055 lpg_pattern_set() error: uninitialized symbol 'lo_pause'.
drivers/leds/rgb/leds-qcom-lpg.c:1056 lpg_pattern_set() error: uninitialized symbol 'hi_pause'.

vim +/lo_pause +1055 drivers/leds/rgb/leds-qcom-lpg.c

e98a860f65428a Bjorn Andersson    2022-05-23   904  static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern,
24e2d05d1b6898 Bjorn Andersson    2022-03-03   905  			   u32 len, int repeat)
24e2d05d1b6898 Bjorn Andersson    2022-03-03   906  {
24e2d05d1b6898 Bjorn Andersson    2022-03-03   907  	struct lpg_channel *chan;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   908  	struct lpg *lpg = led->lpg;
e98a860f65428a Bjorn Andersson    2022-05-23   909  	struct led_pattern *pattern;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   910  	unsigned int brightness_a;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   911  	unsigned int brightness_b;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   912  	unsigned int actual_len;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   913  	unsigned int hi_pause;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   914  	unsigned int lo_pause;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   915  	unsigned int delta_t;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   916  	unsigned int lo_idx;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   917  	unsigned int hi_idx;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   918  	unsigned int i;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   919  	bool ping_pong = true;
e98a860f65428a Bjorn Andersson    2022-05-23   920  	int ret = -EINVAL;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   921  
24e2d05d1b6898 Bjorn Andersson    2022-03-03   922  	/* Hardware only support oneshot or indefinite loops */
24e2d05d1b6898 Bjorn Andersson    2022-03-03   923  	if (repeat != -1 && repeat != 1)
24e2d05d1b6898 Bjorn Andersson    2022-03-03   924  		return -EINVAL;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   925  
e98a860f65428a Bjorn Andersson    2022-05-23   926  	/*
e98a860f65428a Bjorn Andersson    2022-05-23   927  	 * The standardized leds-trigger-pattern format defines that the
e98a860f65428a Bjorn Andersson    2022-05-23   928  	 * brightness of the LED follows a linear transition from one entry
e98a860f65428a Bjorn Andersson    2022-05-23   929  	 * in the pattern to the next, over the given delta_t time. It
e98a860f65428a Bjorn Andersson    2022-05-23   930  	 * describes that the way to perform instant transitions a zero-length
e98a860f65428a Bjorn Andersson    2022-05-23   931  	 * entry should be added following a pattern entry.
e98a860f65428a Bjorn Andersson    2022-05-23   932  	 *
e98a860f65428a Bjorn Andersson    2022-05-23   933  	 * The LPG hardware is only able to perform the latter (no linear
e98a860f65428a Bjorn Andersson    2022-05-23   934  	 * transitions), so require each entry in the pattern to be followed by
e98a860f65428a Bjorn Andersson    2022-05-23   935  	 * a zero-length transition.
e98a860f65428a Bjorn Andersson    2022-05-23   936  	 */
e98a860f65428a Bjorn Andersson    2022-05-23   937  	if (len % 2)
e98a860f65428a Bjorn Andersson    2022-05-23   938  		return -EINVAL;
e98a860f65428a Bjorn Andersson    2022-05-23   939  
e98a860f65428a Bjorn Andersson    2022-05-23   940  	pattern = kcalloc(len / 2, sizeof(*pattern), GFP_KERNEL);
e98a860f65428a Bjorn Andersson    2022-05-23   941  	if (!pattern)
e98a860f65428a Bjorn Andersson    2022-05-23   942  		return -ENOMEM;
e98a860f65428a Bjorn Andersson    2022-05-23   943  
e98a860f65428a Bjorn Andersson    2022-05-23   944  	for (i = 0; i < len; i += 2) {
e98a860f65428a Bjorn Andersson    2022-05-23   945  		if (led_pattern[i].brightness != led_pattern[i + 1].brightness)
e98a860f65428a Bjorn Andersson    2022-05-23   946  			goto out_free_pattern;
e98a860f65428a Bjorn Andersson    2022-05-23   947  		if (led_pattern[i + 1].delta_t != 0)
e98a860f65428a Bjorn Andersson    2022-05-23   948  			goto out_free_pattern;
e98a860f65428a Bjorn Andersson    2022-05-23   949  
e98a860f65428a Bjorn Andersson    2022-05-23   950  		pattern[i / 2].brightness = led_pattern[i].brightness;
e98a860f65428a Bjorn Andersson    2022-05-23   951  		pattern[i / 2].delta_t = led_pattern[i].delta_t;
e98a860f65428a Bjorn Andersson    2022-05-23   952  	}
e98a860f65428a Bjorn Andersson    2022-05-23   953  
e98a860f65428a Bjorn Andersson    2022-05-23   954  	len /= 2;
e98a860f65428a Bjorn Andersson    2022-05-23   955  
24e2d05d1b6898 Bjorn Andersson    2022-03-03   956  	/*
24e2d05d1b6898 Bjorn Andersson    2022-03-03   957  	 * Specifying a pattern of length 1 causes the hardware to iterate
24e2d05d1b6898 Bjorn Andersson    2022-03-03   958  	 * through the entire LUT, so prohibit this.
24e2d05d1b6898 Bjorn Andersson    2022-03-03   959  	 */
24e2d05d1b6898 Bjorn Andersson    2022-03-03   960  	if (len < 2)
e98a860f65428a Bjorn Andersson    2022-05-23   961  		goto out_free_pattern;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   962  
24e2d05d1b6898 Bjorn Andersson    2022-03-03   963  	/*
24e2d05d1b6898 Bjorn Andersson    2022-03-03   964  	 * The LPG plays patterns with at a fixed pace, a "low pause" can be
24e2d05d1b6898 Bjorn Andersson    2022-03-03   965  	 * used to stretch the first delay of the pattern and a "high pause"
24e2d05d1b6898 Bjorn Andersson    2022-03-03   966  	 * the last one.
24e2d05d1b6898 Bjorn Andersson    2022-03-03   967  	 *
24e2d05d1b6898 Bjorn Andersson    2022-03-03   968  	 * In order to save space the pattern can be played in "ping pong"
24e2d05d1b6898 Bjorn Andersson    2022-03-03   969  	 * mode, in which the pattern is first played forward, then "high
24e2d05d1b6898 Bjorn Andersson    2022-03-03   970  	 * pause" is applied, then the pattern is played backwards and finally
24e2d05d1b6898 Bjorn Andersson    2022-03-03   971  	 * the "low pause" is applied.
24e2d05d1b6898 Bjorn Andersson    2022-03-03   972  	 *
24e2d05d1b6898 Bjorn Andersson    2022-03-03   973  	 * The middle elements of the pattern are used to determine delta_t and
24e2d05d1b6898 Bjorn Andersson    2022-03-03   974  	 * the "low pause" and "high pause" multipliers are derrived from this.
24e2d05d1b6898 Bjorn Andersson    2022-03-03   975  	 *
24e2d05d1b6898 Bjorn Andersson    2022-03-03   976  	 * The first element in the pattern is used to determine "low pause".
24e2d05d1b6898 Bjorn Andersson    2022-03-03   977  	 *
24e2d05d1b6898 Bjorn Andersson    2022-03-03   978  	 * If the specified pattern is a palindrome the ping pong mode is
24e2d05d1b6898 Bjorn Andersson    2022-03-03   979  	 * enabled. In this scenario the delta_t of the middle entry (i.e. the
24e2d05d1b6898 Bjorn Andersson    2022-03-03   980  	 * last in the programmed pattern) determines the "high pause".
05c1d2a258599b Anjelique Melendez 2023-11-29   981  	 *
05c1d2a258599b Anjelique Melendez 2023-11-29   982  	 * SDAM-based devices do not support "ping-pong", "low pause" or "high pause"
24e2d05d1b6898 Bjorn Andersson    2022-03-03   983  	 */
24e2d05d1b6898 Bjorn Andersson    2022-03-03   984  
24e2d05d1b6898 Bjorn Andersson    2022-03-03   985  	/* Detect palindromes and use "ping pong" to reduce LUT usage */
05c1d2a258599b Anjelique Melendez 2023-11-29   986  	if (lpg->lut_base) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03   987  		for (i = 0; i < len / 2; i++) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03   988  			brightness_a = pattern[i].brightness;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   989  			brightness_b = pattern[len - i - 1].brightness;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   990  
24e2d05d1b6898 Bjorn Andersson    2022-03-03   991  			if (brightness_a != brightness_b) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03   992  				ping_pong = false;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   993  				break;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   994  			}
24e2d05d1b6898 Bjorn Andersson    2022-03-03   995  		}
05c1d2a258599b Anjelique Melendez 2023-11-29   996  	} else
05c1d2a258599b Anjelique Melendez 2023-11-29   997  		ping_pong = false;
24e2d05d1b6898 Bjorn Andersson    2022-03-03   998  
24e2d05d1b6898 Bjorn Andersson    2022-03-03   999  	/* The pattern length to be written to the LUT */
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1000  	if (ping_pong)
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1001  		actual_len = (len + 1) / 2;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1002  	else
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1003  		actual_len = len;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1004  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1005  	/*
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1006  	 * Validate that all delta_t in the pattern are the same, with the
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1007  	 * exception of the middle element in case of ping_pong.
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1008  	 */
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1009  	delta_t = pattern[1].delta_t;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1010  	for (i = 2; i < len; i++) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1011  		if (pattern[i].delta_t != delta_t) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1012  			/*
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1013  			 * Allow last entry in the full or shortened pattern to
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1014  			 * specify hi pause. Reject other variations.
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1015  			 */
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1016  			if (i != actual_len - 1)
e98a860f65428a Bjorn Andersson    2022-05-23  1017  				goto out_free_pattern;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1018  		}
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1019  	}
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1020  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1021  	/* LPG_RAMP_DURATION_REG is a 9bit */
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1022  	if (delta_t >= BIT(9))
e98a860f65428a Bjorn Andersson    2022-05-23  1023  		goto out_free_pattern;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1024  
05c1d2a258599b Anjelique Melendez 2023-11-29  1025  	/*
05c1d2a258599b Anjelique Melendez 2023-11-29  1026  	 * Find "low pause" and "high pause" in the pattern in the LUT case.
05c1d2a258599b Anjelique Melendez 2023-11-29  1027  	 * SDAM-based devices require equal duration of all steps
05c1d2a258599b Anjelique Melendez 2023-11-29  1028  	 */
05c1d2a258599b Anjelique Melendez 2023-11-29  1029  	if (lpg->lut_base) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1030  		lo_pause = pattern[0].delta_t;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1031  		hi_pause = pattern[actual_len - 1].delta_t;
05c1d2a258599b Anjelique Melendez 2023-11-29  1032  	} else {
05c1d2a258599b Anjelique Melendez 2023-11-29  1033  		if (delta_t != pattern[0].delta_t || delta_t != pattern[actual_len - 1].delta_t)
05c1d2a258599b Anjelique Melendez 2023-11-29  1034  			goto out_free_pattern;

lo_pause and hi_pause are not set on this else path

05c1d2a258599b Anjelique Melendez 2023-11-29  1035  	}
05c1d2a258599b Anjelique Melendez 2023-11-29  1036  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1037  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1038  	mutex_lock(&lpg->lock);
05c1d2a258599b Anjelique Melendez 2023-11-29  1039  
05c1d2a258599b Anjelique Melendez 2023-11-29  1040  	if (lpg->lut_base)
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1041  		ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx);
05c1d2a258599b Anjelique Melendez 2023-11-29  1042  	else
05c1d2a258599b Anjelique Melendez 2023-11-29  1043  		ret = lpg_lut_store_sdam(lpg, pattern, actual_len, &lo_idx, &hi_idx);
05c1d2a258599b Anjelique Melendez 2023-11-29  1044  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1045  	if (ret < 0)
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1046  		goto out_unlock;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1047  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1048  	for (i = 0; i < led->num_channels; i++) {
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1049  		chan = led->channels[i];
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1050  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1051  		chan->ramp_tick_ms = delta_t;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1052  		chan->ramp_ping_pong = ping_pong;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1053  		chan->ramp_oneshot = repeat != -1;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1054  
24e2d05d1b6898 Bjorn Andersson    2022-03-03 @1055  		chan->ramp_lo_pause_ms = lo_pause;
24e2d05d1b6898 Bjorn Andersson    2022-03-03 @1056  		chan->ramp_hi_pause_ms = hi_pause;
                                                                                         ^^^^^^^^

24e2d05d1b6898 Bjorn Andersson    2022-03-03  1057  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1058  		chan->pattern_lo_idx = lo_idx;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1059  		chan->pattern_hi_idx = hi_idx;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1060  	}
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1061  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1062  out_unlock:
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1063  	mutex_unlock(&lpg->lock);
e98a860f65428a Bjorn Andersson    2022-05-23  1064  out_free_pattern:
e98a860f65428a Bjorn Andersson    2022-05-23  1065  	kfree(pattern);
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1066  
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1067  	return ret;
24e2d05d1b6898 Bjorn Andersson    2022-03-03  1068  }

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v7 4/7] leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM

[Lee Jones]

On Thu, 30 Nov 2023, Dan Carpenter wrote:

> Hi Anjelique,
> 
> kernel test robot noticed the following build warnings:
> 
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Anjelique-Melendez/dt-bindings-soc-qcom-Add-qcom-pbs-bindings/20231130-094701
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
> patch link:    https://lore.kernel.org/r/20231130013615.14287-5-quic_amelende%40quicinc.com
> patch subject: [PATCH v7 4/7] leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM
> config: csky-randconfig-r071-20231130 (https://download.01.org/0day-ci/archive/20231130/202311302200.RcTP9m0Y-lkp@intel.com/config)
> compiler: csky-linux-gcc (GCC) 13.2.0
> reproduce: (https://download.01.org/0day-ci/archive/20231130/202311302200.RcTP9m0Y-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Reported-by: Dan Carpenter <error27@gmail.com>
> | Closes: https://lore.kernel.org/r/202311302200.RcTP9m0Y-lkp@intel.com/
> 
> smatch warnings:
> drivers/leds/rgb/leds-qcom-lpg.c:1055 lpg_pattern_set() error: uninitialized symbol 'lo_pause'.
> drivers/leds/rgb/leds-qcom-lpg.c:1056 lpg_pattern_set() error: uninitialized symbol 'hi_pause'.

FYI, I'll not review this set until these are fixed.

-- 
Lee Jones [李琼斯]