pwr-sel property is specific to ti,lp8501, make it conditional of the
related compatible.
Signed-off-by: Christian Marangi <[email protected]>
Acked-by: Rob Herring (Arm) <[email protected]>
---
v3:
- Add ACK tag
.../devicetree/bindings/leds/leds-lp55xx.yaml | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml b/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml
index e9d4514d0166..77828dedbb9f 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml
@@ -151,6 +151,16 @@ patternProperties:
$ref: /schemas/types.yaml#/definitions/string
description: name of channel
+if:
+ not:
+ properties:
+ compatible:
+ contains:
+ const: ti,lp8501
+then:
+ properties:
+ pwr-sel: false
+
required:
- compatible
- reg
--
2.43.0
Add new ti,lp5569 compatible, this is similar to national,lp5523 with
slight change to reg order and reg type and advanced way for LED fault.
Signed-off-by: Christian Marangi <[email protected]>
Acked-by: Conor Dooley <[email protected]>
---
v2:
- Add ACK tag
Documentation/devicetree/bindings/leds/leds-lp55xx.yaml | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml b/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml
index 77828dedbb9f..fe8aaecf3010 100644
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.yaml
@@ -28,6 +28,7 @@ properties:
- national,lp5523
- ti,lp55231
- ti,lp5562
+ - ti,lp5569
- ti,lp8501
reg:
--
2.43.0
Add support for Texas Instruments LP5569 LED driver.
Texas Instruments LP5569 is 9 channels chip with programmable engines.
It almost a copy of LP5523 with fundamental changes to regs order and
regs content.
Has difference in how the clock is handled and doesn't support detecting
clock time automatically, different handling for selftest and different
scheme for the status regs.
One some devices using this LED Controller (a NBG7815 Router) it was
found loading big precompiled pattern with up to 3 bytes of code. To
have support for this "extended" scenarion, hardcode each engine to
support 4 pages of precompiled pattern (128 bytes of code) and 1 page
for each MUX. This gives plenty of space for any kind precompiled
pattern keeping simple logic for page handling of each engine and mux.
Signed-off-by: Christian Marangi <[email protected]>
---
v3:
- Enlarge and support program size up to 128bytes
v2:
- Fix compilation error with target that doesn't
include bitfield.h
drivers/leds/Kconfig | 16 +-
drivers/leds/Makefile | 1 +
drivers/leds/leds-lp5569.c | 1159 ++++++++++++++++++++++++++++++++++++
3 files changed, 1173 insertions(+), 3 deletions(-)
create mode 100644 drivers/leds/leds-lp5569.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 05e6af88b88c..b1d7d94317b3 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -414,7 +414,7 @@ config LEDS_LP50XX
module will be called leds-lp50xx.
config LEDS_LP55XX_COMMON
- tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
+ tristate "Common Driver for TI/National LP5521/5523/55231/5562/5569/8501"
depends on LEDS_CLASS
depends on LEDS_CLASS_MULTICOLOR
depends on OF
@@ -422,8 +422,8 @@ config LEDS_LP55XX_COMMON
select FW_LOADER
select FW_LOADER_USER_HELPER
help
- This option supports common operations for LP5521/5523/55231/5562/8501
- devices.
+ This option supports common operations for LP5521/5523/55231/5562/5569/
+ 8501 devices.
config LEDS_LP5521
tristate "LED Support for N.S. LP5521 LED driver chip"
@@ -456,6 +456,16 @@ config LEDS_LP5562
Driver provides direct control via LED class and interface for
programming the engines.
+config LEDS_LP5569
+ tristate "LED Support for TI LP5569 LED driver chip"
+ depends on LEDS_CLASS && I2C
+ depends on LEDS_LP55XX_COMMON
+ help
+ If you say yes here you get support for TI LP5569 LED driver.
+ It is 9 channels chip with programmable engines.
+ Driver provides direct control via LED class and interface for
+ programming the engines.
+
config LEDS_LP8501
tristate "LED Support for TI LP8501 LED driver chip"
depends on LEDS_CLASS && I2C
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index effdfc6f1e95..ad21941efa19 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -51,6 +51,7 @@ obj-$(CONFIG_LEDS_LP50XX) += leds-lp50xx.o
obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
obj-$(CONFIG_LEDS_LP5562) += leds-lp5562.o
+obj-$(CONFIG_LEDS_LP5569) += leds-lp5569.o
obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o
obj-$(CONFIG_LEDS_LP8501) += leds-lp8501.o
obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
diff --git a/drivers/leds/leds-lp5569.c b/drivers/leds/leds-lp5569.c
new file mode 100644
index 000000000000..b98390263534
--- /dev/null
+++ b/drivers/leds/leds-lp5569.c
@@ -0,0 +1,1159 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * lp5569.c - LP5569LED Driver
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * Contact: Samu Onkalo <[email protected]>
+ * Milo(Woogyom) Kim <[email protected]>
+ * Christian Marangi <[email protected]>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+#include <dt-bindings/leds/leds-lp55xx.h>
+
+#include "leds-lp55xx-common.h"
+
+/* Registers */
+#define LP5569_REG_ENABLE 0x00
+#define LP5569_ENABLE BIT(6)
+
+#define LP5569_REG_EXEC_CTRL 0x01
+/*
+ * Program Memory Operations
+ * Same Mask for each engine for both mode and exec
+ * ENG1 GENMASK(3, 2)
+ * ENG2 GENMASK(5, 4)
+ * ENG3 GENMASK(7, 6)
+ */
+#define LP5569_MODE_ENG_MASK GENMASK(1, 0)
+#define LP5569_MODE_ENG_SHIFT 2
+#define LP5569_MODE_DISABLE_ENG FIELD_PREP_CONST(LP5569_MODE_ENG_MASK, 0x0)
+#define LP5569_MODE_LOAD_ENG FIELD_PREP_CONST(LP5569_MODE_ENG_MASK, 0x1)
+#define LP5569_MODE_RUN_ENG FIELD_PREP_CONST(LP5569_MODE_ENG_MASK, 0x2)
+#define LP5569_MODE_HALT_ENG FIELD_PREP_CONST(LP5569_MODE_ENG_MASK, 0x3)
+
+#define LP5569_MODE_ENGn_SHIFT(n) (LP5569_MODE_ENG_SHIFT + (2 * (3 - (n))))
+#define LP5569_MODE_ENGn_MASK(n) (LP5569_MODE_ENG_MASK << LP5569_MODE_ENGn_SHIFT(n))
+#define LP5569_MODE_ENGn_GET(n, mode) \
+ (((mode) >> LP5569_MODE_ENGn_SHIFT(n)) & LP5569_MODE_ENG_MASK)
+
+#define LP5569_REG_OP_MODE 0x02
+#define LP5569_EXEC_ENG_MASK GENMASK(1, 0)
+#define LP5569_EXEC_ENG_SHIFT 2
+#define LP5569_EXEC_HOLD_ENG FIELD_PREP_CONST(LP5569_EXEC_ENG_MASK, 0x0)
+#define LP5569_EXEC_STEP_ENG FIELD_PREP_CONST(LP5569_EXEC_ENG_MASK, 0x1)
+#define LP5569_EXEC_RUN_ENG FIELD_PREP_CONST(LP5569_EXEC_ENG_MASK, 0x2)
+#define LP5569_EXEC_ONCE_ENG FIELD_PREP_CONST(LP5569_EXEC_ENG_MASK, 0x3)
+
+#define LP5569_EXEC_ENGn_SHIFT(n) (LP5569_EXEC_ENG_SHIFT + (2 * (3 - (n))))
+#define LP5569_EXEC_ENGn_MASK(n) (LP5569_EXEC_ENG_MASK << LP5569_EXEC_ENGn_SHIFT(n))
+
+#define LP5569_REG_ENABLE_LEDS_MSB 0x04
+#define LP5569_REG_ENABLE_LEDS_LSB 0x05
+#define LP5569_REG_LED_CTRL_BASE 0x07
+#define LP5569_FADER_MAPPING_MASK GENMASK(7, 5)
+#define LP5569_REG_LED_PWM_BASE 0x16
+#define LP5569_REG_LED_CURRENT_BASE 0x22
+#define LP5569_REG_MISC 0x2F
+#define LP5569_AUTO_INC BIT(6)
+#define LP5569_PWR_SAVE BIT(5)
+#define LP5569_CP_MODE_MASK GENMASK(4, 3)
+#define LP5569_PWM_PWR_SAVE BIT(2)
+#define LP5569_INTERNAL_CLK BIT(0)
+#define LP5569_REG_MISC2 0x33
+#define LP5569_LED_SHORT_TEST BIT(4)
+#define LP5569_LED_OPEN_TEST BIT(3)
+#define LP5569_REG_STATUS 0x3C
+#define LP5569_MASK_BUSY BIT(7)
+#define LP5569_STARTUP_BUSY BIT(6)
+#define LP5569_ENGINE_BUSY BIT(5)
+#define LP5569_ENGINE1_INT BIT(2)
+#define LP5569_ENGINE2_INT BIT(1)
+#define LP5569_ENGINE3_INT BIT(0)
+#define LP5569_ENG_STATUS_MASK (LP5569_ENGINE1_INT | LP5569_ENGINE2_INT | \
+ LP5569_ENGINE3_INT)
+#define LP5569_REG_IO_CONTROL 0x3D
+#define LP5569_CLK_OUTPUT BIT(3)
+#define LP5569_REG_RESET 0x3F
+#define LP5569_RESET 0xFF
+#define LP5569_REG_MASTER_FADER_BASE 0x46
+#define LP5569_REG_CH1_PROG_START 0x4B
+#define LP5569_REG_CH2_PROG_START 0x4C
+#define LP5569_REG_CH3_PROG_START 0x4D
+#define LP5569_REG_PROG_PAGE_SEL 0x4F
+#define LP5569_REG_PROG_MEM 0x50
+#define LP5569_REG_LED_FAULT1 0x81
+#define LP5569_LED_FAULT8 BIT(0)
+#define LP5569_REG_LED_FAULT2 0x82
+#define LP5569_LED_FAULT7 BIT(7)
+#define LP5569_LED_FAULT6 BIT(6)
+#define LP5569_LED_FAULT5 BIT(5)
+#define LP5569_LED_FAULT4 BIT(4)
+#define LP5569_LED_FAULT3 BIT(3)
+#define LP5569_LED_FAULT2 BIT(2)
+#define LP5569_LED_FAULT1 BIT(1)
+#define LP5569_LED_FAULT0 BIT(0)
+
+#define LP5569_MAX_LEDS 9
+
+#define LP5569_PROGRAM_PAGES 16
+#define LP5569_BYTES_PER_PAGE 32 /* bytes */
+#define LP5569_PROGRAM_LENGTH (LP5569_BYTES_PER_PAGE * 4) /* 128 bytes (4 pages) */
+/* Memory is used like this:
+ * 0x00 engine 1 program (4 pages)
+ * 0x40 engine 2 program (4 pages)
+ * 0x80 engine 3 program (4 pages)
+ * 0xc0 engine 1 muxing info (1 page)
+ * 0xd0 engine 2 muxing info (1 page)
+ * 0xe0 engine 3 muxing info (1 page)
+ */
+#define LP5569_ENG1_PROG_ADDR 0x0
+#define LP5569_ENG2_PROG_ADDR 0x40
+#define LP5569_ENG3_PROG_ADDR 0x80
+#define LP5569_ENG1_MUX_ADDR 0xc0
+#define LP5569_ENG2_MUX_ADDR 0xd0
+#define LP5569_ENG3_MUX_ADDR 0xe0
+
+#define LP5569_BITS_PER_ADDR 16
+#define LP5569_PAGE_OFFSET(addr) ((addr) / LP5569_BITS_PER_ADDR)
+
+/* Memory Page Selection */
+#define LP5569_PAGE_ENG_OFFSET LP5569_PAGE_OFFSET(LP5569_ENG1_PROG_ADDR)
+#define LP5569_PAGE_ENG(n) ((((n) - 1) * 4) + LP5569_PAGE_ENG_OFFSET)
+#define LP5569_PAGE_MUX_OFFSET LP5569_PAGE_OFFSET(LP5569_ENG1_MUX_ADDR)
+#define LP5569_PAGE_MUX(n) (((n) - 1) + LP5569_PAGE_MUX_OFFSET)
+
+#define LEDn_STATUS_FAULT(n, status) ((status) >> (n) & BIT(0))
+#define LED_ACTIVE(mux, led) (!!((mux) & (0x0001 << (led))))
+
+#define LP5569_DEFAULT_CONFIG \
+ (LP5569_AUTO_INC | LP5569_PWR_SAVE | LP5569_PWM_PWR_SAVE)
+
+enum lp5569_chip_id {
+ LP5569,
+};
+
+static int lp5569_init_program_engine(struct lp55xx_chip *chip);
+
+static inline void lp5569_wait_opmode_done(void)
+{
+ usleep_range(1000, 2000);
+}
+
+static void lp5569_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5569_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
+}
+
+static int lp5569_post_init_device(struct lp55xx_chip *chip)
+{
+ int ret;
+ int val;
+
+ ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
+ if (ret)
+ return ret;
+
+ /* Chip startup time is 500 us, 1 - 2 ms gives some margin */
+ usleep_range(1000, 2000);
+
+ val = LP5569_DEFAULT_CONFIG;
+ val |= FIELD_PREP(LP5569_CP_MODE_MASK, chip->pdata->charge_pump_mode);
+
+ if (chip->pdata->clock_mode == LP55XX_CLOCK_INT)
+ val |= LP5569_INTERNAL_CLK;
+
+ ret = lp55xx_write(chip, LP5569_REG_MISC, val);
+ if (ret)
+ return ret;
+
+ if (chip->pdata->clock_mode == LP55XX_CLOCK_INT) {
+ ret = lp55xx_update_bits(chip, LP5569_REG_IO_CONTROL,
+ LP5569_CLK_OUTPUT,
+ LP5569_CLK_OUTPUT);
+ if (ret)
+ return ret;
+ }
+
+ return lp5569_init_program_engine(chip);
+}
+
+static void lp5569_load_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask, val;
+
+ mask = LP5569_MODE_ENGn_MASK(idx);
+ val = LP5569_MODE_LOAD_ENG << LP5569_MODE_ENGn_SHIFT(idx);
+
+ lp55xx_update_bits(chip, LP5569_REG_OP_MODE, mask, val);
+
+ lp5569_wait_opmode_done();
+}
+
+static void lp5569_load_engine_and_select_page(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+
+ lp5569_load_engine(chip);
+
+ lp55xx_write(chip, LP5569_REG_PROG_PAGE_SEL, LP5569_PAGE_ENG(idx));
+}
+
+static void lp5569_stop_all_engines(struct lp55xx_chip *chip)
+{
+ lp55xx_write(chip, LP5569_REG_OP_MODE, 0);
+ lp5569_wait_opmode_done();
+}
+
+static void lp5569_stop_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+
+ lp55xx_update_bits(chip, LP5569_REG_OP_MODE, LP5569_MODE_ENGn_MASK(idx), 0);
+
+ lp5569_wait_opmode_done();
+}
+
+static void lp5569_turn_off_channels(struct lp55xx_chip *chip)
+{
+ int i;
+
+ for (i = 0; i < LP5569_MAX_LEDS; i++)
+ lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + i, 0);
+}
+
+static void lp5569_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ int i, ret;
+ u8 mode;
+ u8 exec;
+
+ /* stop engine */
+ if (!start) {
+ lp5569_stop_engine(chip);
+ lp5569_turn_off_channels(chip);
+ return;
+ }
+
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
+
+ ret = lp55xx_read(chip, LP5569_REG_OP_MODE, &mode);
+ if (ret)
+ return;
+
+ ret = lp55xx_read(chip, LP5569_REG_EXEC_CTRL, &exec);
+ if (ret)
+ return;
+
+ /* change operation mode to RUN only when each engine is loading */
+ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
+ if (LP5569_MODE_ENGn_GET(i, mode) != LP5569_MODE_LOAD_ENG)
+ continue;
+
+ mode &= ~LP5569_MODE_ENGn_MASK(i);
+ mode |= LP5569_MODE_RUN_ENG << LP5569_MODE_ENGn_SHIFT(i);
+ exec &= ~LP5569_EXEC_ENGn_MASK(i);
+ exec |= LP5569_EXEC_RUN_ENG << LP5569_EXEC_ENGn_SHIFT(i);
+ }
+
+ lp55xx_write(chip, LP5569_REG_OP_MODE, mode);
+ lp5569_wait_opmode_done();
+
+ lp55xx_write(chip, LP5569_REG_EXEC_CTRL, exec);
+}
+
+static int lp5569_init_program_engine(struct lp55xx_chip *chip)
+{
+ int i;
+ int j;
+ int ret;
+ u8 status;
+ /* one pattern per engine setting LED MUX start and stop addresses */
+ static const u8 pattern[][LP5569_BYTES_PER_PAGE] = {
+ { 0x9c, LP5569_ENG1_MUX_ADDR, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
+ { 0x9c, LP5569_ENG2_MUX_ADDR, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
+ { 0x9c, LP5569_ENG3_MUX_ADDR, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
+ };
+
+ /* hardcode 32 bytes of memory for each engine from program memory */
+ ret = lp55xx_write(chip, LP5569_REG_CH1_PROG_START, LP5569_ENG1_PROG_ADDR);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5569_REG_CH2_PROG_START, LP5569_ENG2_PROG_ADDR);
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5569_REG_CH3_PROG_START, LP5569_ENG3_PROG_ADDR);
+ if (ret)
+ return ret;
+
+ /* write LED MUX address space for each engine */
+ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
+ chip->engine_idx = i;
+ lp5569_load_engine_and_select_page(chip);
+
+ for (j = 0; j < LP5569_BYTES_PER_PAGE; j++) {
+ ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + j,
+ pattern[i - 1][j]);
+ if (ret)
+ goto out;
+ }
+ }
+
+ lp5569_run_engine(chip, true);
+
+ /* Let the programs run for couple of ms and check the engine status */
+ usleep_range(3000, 6000);
+ lp55xx_read(chip, LP5569_REG_STATUS, &status);
+ status = FIELD_GET(LP5569_ENG_STATUS_MASK, status);
+
+ if (status != LP5569_ENG_STATUS_MASK) {
+ dev_err(&chip->cl->dev,
+ "could not configure LED engine, status = 0x%.2x\n",
+ status);
+ ret = -1;
+ }
+
+out:
+ lp5569_stop_all_engines(chip);
+ return ret;
+}
+
+static int lp5569_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 pattern[LP5569_PROGRAM_LENGTH] = {0};
+ unsigned int cmd;
+ char c[3];
+ int nrchars;
+ int ret;
+ int offset = 0;
+ int page, i = 0;
+
+ while ((offset < size - 1) && (i < LP5569_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
+
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
+
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
+
+ for (page = 0; page < LP5569_PROGRAM_LENGTH / LP5569_BYTES_PER_PAGE; page++) {
+ /* Write to the next page each 32 bytes */
+ lp55xx_write(chip, LP5569_REG_PROG_PAGE_SEL,
+ LP5569_PAGE_ENG(idx) + page);
+
+ for (i = 0; i < LP5569_PROGRAM_LENGTH; i++) {
+ ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + i,
+ pattern[i + (page * LP5569_BYTES_PER_PAGE)]);
+ if (ret)
+ return -EINVAL;
+ }
+ }
+
+
+ return size;
+
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
+}
+
+static void lp5569_firmware_loaded(struct lp55xx_chip *chip)
+{
+ const struct firmware *fw = chip->fw;
+
+ if (fw->size > (LP5569_BYTES_PER_PAGE * LP5569_PROGRAM_PAGES * 2)) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
+
+ /*
+ * Program memory sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5569_load_engine_and_select_page(chip);
+ lp5569_update_program_memory(chip, fw->data, fw->size);
+}
+
+static ssize_t show_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
+
+ switch (mode) {
+ case LP55XX_ENGINE_RUN:
+ return sprintf(buf, "run\n");
+ case LP55XX_ENGINE_LOAD:
+ return sprintf(buf, "load\n");
+ case LP55XX_ENGINE_DISABLED:
+ default:
+ return sprintf(buf, "disabled\n");
+ }
+}
+show_mode(1)
+show_mode(2)
+show_mode(3)
+
+static ssize_t store_engine_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+
+ if (!strncmp(buf, "run", 3)) {
+ lp5569_run_engine(chip, true);
+ engine->mode = LP55XX_ENGINE_RUN;
+ } else if (!strncmp(buf, "load", 4)) {
+ lp5569_stop_engine(chip);
+ lp5569_load_engine(chip);
+ engine->mode = LP55XX_ENGINE_LOAD;
+ } else if (!strncmp(buf, "disabled", 8)) {
+ lp5569_stop_engine(chip);
+ engine->mode = LP55XX_ENGINE_DISABLED;
+ }
+
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+store_mode(1)
+store_mode(2)
+store_mode(3)
+
+static int lp5569_mux_parse(const char *buf, u16 *mux, size_t len)
+{
+ u16 tmp_mux = 0;
+ int i;
+
+ len = min_t(int, len, LP5569_MAX_LEDS);
+
+ for (i = 0; i < len; i++) {
+ switch (buf[i]) {
+ case '1':
+ tmp_mux |= (1 << i);
+ break;
+ case '0':
+ break;
+ case '\n':
+ i = len;
+ break;
+ default:
+ return -1;
+ }
+ }
+ *mux = tmp_mux;
+
+ return 0;
+}
+
+static void lp5569_mux_to_array(u16 led_mux, char *array)
+{
+ int i, pos = 0;
+
+ for (i = 0; i < LP5569_MAX_LEDS; i++)
+ pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
+
+ array[pos] = '\0';
+}
+
+static ssize_t show_engine_leds(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ char mux[LP5569_MAX_LEDS + 1];
+
+ lp5569_mux_to_array(chip->engines[nr - 1].led_mux, mux);
+
+ return sprintf(buf, "%s\n", mux);
+}
+show_leds(1)
+show_leds(2)
+show_leds(3)
+
+static int lp5569_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
+{
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+ int ret;
+
+ lp5569_load_engine(chip);
+
+ ret = lp55xx_write(chip, LP5569_REG_PROG_PAGE_SEL, LP5569_PAGE_MUX(nr));
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5569_REG_PROG_MEM, (u8)(mux >> 8));
+ if (ret)
+ return ret;
+
+ ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + 1, (u8)(mux));
+ if (ret)
+ return ret;
+
+ engine->led_mux = mux;
+ return 0;
+}
+
+static ssize_t store_engine_leds(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_engine *engine = &chip->engines[nr - 1];
+ u16 mux = 0;
+ ssize_t ret;
+
+ if (lp5569_mux_parse(buf, &mux, len))
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ ret = -EINVAL;
+
+ if (engine->mode != LP55XX_ENGINE_LOAD)
+ goto leave;
+
+ if (lp5569_load_mux(chip, mux, nr))
+ goto leave;
+
+ ret = len;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+store_leds(1)
+store_leds(2)
+store_leds(3)
+
+static ssize_t store_engine_load(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ chip->engine_idx = nr;
+ lp5569_load_engine_and_select_page(chip);
+ ret = lp5569_update_program_memory(chip, buf, len);
+
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+store_load(1)
+store_load(2)
+store_load(3)
+
+static ssize_t lp5569_led_open_test(struct lp55xx_led *led, char *buf)
+{
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ bool leds_fault[LP5569_MAX_LEDS];
+ struct lp55xx_led *led_tmp = led;
+ int i, ret, pos = 0;
+ u8 status;
+
+ /* Set in STANDBY state */
+ ret = lp55xx_write(chip, LP5569_REG_ENABLE, 0);
+ if (ret)
+ goto exit;
+
+ /* Wait 1ms for device to enter STANDBY state */
+ usleep_range(1000, 2000);
+
+ /* Set Charge Pump to 1.5x */
+ ret = lp55xx_update_bits(chip, LP5569_REG_MISC,
+ FIELD_PREP(LP5569_CP_MODE_MASK, LP55XX_CP_BOOST),
+ LP5569_CP_MODE_MASK);
+ if (ret)
+ goto exit;
+
+ /* Enable LED Open Test */
+ ret = lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST,
+ LP5569_LED_OPEN_TEST);
+ if (ret)
+ goto exit;
+
+ /* Put Device in NORMAL state */
+ ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
+ if (ret)
+ goto exit;
+
+ /* Wait 500 us for device to enter NORMAL state */
+ usleep_range(500, 750);
+
+ /* Enable LED and set to 100% brightness */
+ for (i = 0; i < pdata->num_channels; i++) {
+ ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr,
+ LED_FULL);
+ if (ret)
+ goto exit;
+
+ led_tmp++;
+ }
+
+ /* Wait 500 us for device to fill status regs */
+ usleep_range(500, 750);
+
+ /* Parse status led fault 1 regs */
+ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT1, &status);
+ if (ret < 0)
+ goto exit;
+
+ for (i = 0; i < 8; i++)
+ leds_fault[i] = !!((status >> i) & 0x1);
+
+ /* Parse status led fault 2 regs */
+ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT2, &status);
+ if (ret < 0)
+ goto exit;
+
+ for (i = 0; i < 1; i++)
+ leds_fault[i + 8] = !!((status >> i) & 0x1);
+
+ /* Report LED fault */
+ led_tmp = led;
+ for (i = 0; i < pdata->num_channels; i++) {
+ if (leds_fault[led_tmp->chan_nr])
+ pos += sprintf(buf + pos, "LED %d OPEN FAIL\n",
+ led_tmp->chan_nr);
+
+ led_tmp++;
+ }
+
+ ret = pos;
+
+exit:
+ /* Disable LED Open Test */
+ lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST,
+ 0);
+
+ led_tmp = led;
+ for (i = 0; i < pdata->num_channels; i++) {
+ lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr,
+ 0);
+
+ led_tmp++;
+ }
+
+ return ret;
+}
+
+static ssize_t lp5569_led_short_test(struct lp55xx_led *led, char *buf)
+{
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ bool leds_fault[LP5569_MAX_LEDS];
+ struct lp55xx_led *led_tmp = led;
+ int i, ret, pos = 0;
+ u8 status;
+
+ /* Set in STANDBY state */
+ ret = lp55xx_write(chip, LP5569_REG_ENABLE, 0);
+ if (ret)
+ goto exit;
+
+ /* Wait 1ms for device to enter STANDBY state */
+ usleep_range(1000, 2000);
+
+ /* Set Charge Pump to 1x */
+ ret = lp55xx_update_bits(chip, LP5569_REG_MISC,
+ FIELD_PREP(LP5569_CP_MODE_MASK, LP55XX_CP_BYPASS),
+ LP5569_CP_MODE_MASK);
+ if (ret)
+ goto exit;
+
+ /* Enable LED and set to 100% brightness and current to 100% (25.5mA) */
+ for (i = 0; i < pdata->num_channels; i++) {
+ ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr,
+ LED_FULL);
+ if (ret)
+ goto exit;
+
+ ret = lp55xx_write(chip, LP5569_REG_LED_CURRENT_BASE + led_tmp->chan_nr,
+ LED_FULL);
+ if (ret)
+ goto exit;
+
+ led_tmp++;
+ }
+
+ /* Put Device in NORMAL state */
+ ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
+ if (ret)
+ goto exit;
+
+ /* Wait 500 us for device to enter NORMAL state */
+ usleep_range(500, 750);
+
+ /* Enable LED Shorted Test */
+ ret = lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST,
+ LP5569_LED_SHORT_TEST);
+ if (ret)
+ goto exit;
+
+ /* Wait 500 us for device to fill status regs */
+ usleep_range(500, 750);
+
+ /* Parse status led fault 1 regs */
+ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT1, &status);
+ if (ret < 0)
+ goto exit;
+
+ for (i = 0; i < 8; i++)
+ leds_fault[i] = !!LEDn_STATUS_FAULT(i, status);
+
+ /* Parse status led fault 2 regs */
+ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT2, &status);
+ if (ret < 0)
+ goto exit;
+
+ for (i = 0; i < 1; i++)
+ leds_fault[i + 8] = !!LEDn_STATUS_FAULT(i, status);
+
+ /* Report LED fault */
+ led_tmp = led;
+ for (i = 0; i < pdata->num_channels; i++) {
+ if (leds_fault[led_tmp->chan_nr])
+ pos += sprintf(buf + pos, "LED %d SHORTED FAIL\n",
+ led_tmp->chan_nr);
+
+ led_tmp++;
+ }
+
+ ret = pos;
+
+exit:
+ /* Disable LED Shorted Test */
+ lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_SHORT_TEST,
+ 0);
+
+ led_tmp = led;
+ for (i = 0; i < pdata->num_channels; i++) {
+ lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr,
+ 0);
+
+ led_tmp++;
+ }
+
+ return ret;
+}
+
+static ssize_t lp5569_selftest(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int i, pos = 0;
+
+ mutex_lock(&chip->lock);
+
+ /* Test LED Open */
+ pos = lp5569_led_open_test(led, buf);
+ if (pos < 0)
+ goto fail;
+
+ /* Test LED Shorted */
+ pos = lp5569_led_short_test(led, buf);
+ if (pos < 0)
+ goto fail;
+
+ for (i = 0; i < chip->pdata->num_channels; i++) {
+ /* Restore current */
+ lp55xx_write(chip, LP5569_REG_LED_CURRENT_BASE + led->chan_nr,
+ led->led_current);
+
+ /* Restore brightness */
+ lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ led++;
+ }
+
+ if (pos == 0)
+ pos = sprintf(buf, "OK\n");
+ goto release_lock;
+fail:
+ pos = sprintf(buf, "FAIL\n");
+
+release_lock:
+ mutex_unlock(&chip->lock);
+
+ return pos;
+}
+
+#define show_fader(nr) \
+static ssize_t show_master_fader##nr(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return show_master_fader(dev, attr, buf, nr); \
+}
+
+#define store_fader(nr) \
+static ssize_t store_master_fader##nr(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ return store_master_fader(dev, attr, buf, len, nr); \
+}
+
+static ssize_t show_master_fader(struct device *dev,
+ struct device_attribute *attr,
+ char *buf, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ u8 val;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_read(chip, LP5569_REG_MASTER_FADER_BASE + nr - 1, &val);
+ mutex_unlock(&chip->lock);
+
+ if (ret == 0)
+ ret = sprintf(buf, "%u\n", val);
+
+ return ret;
+}
+show_fader(1)
+show_fader(2)
+show_fader(3)
+
+static ssize_t store_master_fader(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len, int nr)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ unsigned long val;
+
+ if (kstrtoul(buf, 0, &val))
+ return -EINVAL;
+
+ if (val > 0xff)
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP5569_REG_MASTER_FADER_BASE + nr - 1,
+ (u8)val);
+ mutex_unlock(&chip->lock);
+
+ if (ret == 0)
+ ret = len;
+
+ return ret;
+}
+store_fader(1)
+store_fader(2)
+store_fader(3)
+
+static ssize_t show_master_fader_leds(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int i, ret, pos = 0;
+ u8 val;
+
+ mutex_lock(&chip->lock);
+
+ for (i = 0; i < LP5569_MAX_LEDS; i++) {
+ ret = lp55xx_read(chip, LP5569_REG_LED_CTRL_BASE + i, &val);
+ if (ret)
+ goto leave;
+
+ val = FIELD_PREP(LP5569_FADER_MAPPING_MASK, val);
+ if (val > FIELD_MAX(LP5569_FADER_MAPPING_MASK)) {
+ ret = -EINVAL;
+ goto leave;
+ }
+ buf[pos++] = val + '0';
+ }
+ buf[pos++] = '\n';
+ ret = pos;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static ssize_t store_master_fader_leds(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ int i, n, ret;
+ u8 val;
+
+ n = min_t(int, len, LP5569_MAX_LEDS);
+
+ mutex_lock(&chip->lock);
+
+ for (i = 0; i < n; i++) {
+ if (buf[i] >= '0' && buf[i] <= '7') {
+ val = FIELD_PREP(LP5569_FADER_MAPPING_MASK, buf[i] - '0');
+ ret = lp55xx_update_bits(chip,
+ LP5569_REG_LED_CTRL_BASE + i,
+ LP5569_FADER_MAPPING_MASK,
+ val);
+ if (ret)
+ goto leave;
+ } else {
+ ret = -EINVAL;
+ goto leave;
+ }
+ }
+ ret = len;
+leave:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int lp5569_multicolor_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+ int i;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < led->mc_cdev.num_colors; i++) {
+ ret = lp55xx_write(chip,
+ LP5569_REG_LED_PWM_BASE +
+ led->mc_cdev.subled_info[i].channel,
+ led->mc_cdev.subled_info[i].brightness);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int lp5569_led_brightness(struct lp55xx_led *led)
+{
+ struct lp55xx_chip *chip = led->chip;
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
+static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
+static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
+static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
+static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
+static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
+static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
+static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
+static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
+static LP55XX_DEV_ATTR_RO(selftest, lp5569_selftest);
+static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
+ store_master_fader1);
+static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
+ store_master_fader2);
+static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
+ store_master_fader3);
+static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
+ store_master_fader_leds);
+
+static struct attribute *lp5569_attributes[] = {
+ &dev_attr_engine1_mode.attr,
+ &dev_attr_engine2_mode.attr,
+ &dev_attr_engine3_mode.attr,
+ &dev_attr_engine1_load.attr,
+ &dev_attr_engine2_load.attr,
+ &dev_attr_engine3_load.attr,
+ &dev_attr_engine1_leds.attr,
+ &dev_attr_engine2_leds.attr,
+ &dev_attr_engine3_leds.attr,
+ &dev_attr_selftest.attr,
+ &dev_attr_master_fader1.attr,
+ &dev_attr_master_fader2.attr,
+ &dev_attr_master_fader3.attr,
+ &dev_attr_master_fader_leds.attr,
+ NULL,
+};
+
+static const struct attribute_group lp5569_group = {
+ .attrs = lp5569_attributes,
+};
+
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5569_cfg = {
+ .reset = {
+ .addr = LP5569_REG_RESET,
+ .val = LP5569_RESET,
+ },
+ .enable = {
+ .addr = LP5569_REG_ENABLE,
+ .val = LP5569_ENABLE,
+ },
+ .max_channel = LP5569_MAX_LEDS,
+ .post_init_device = lp5569_post_init_device,
+ .brightness_fn = lp5569_led_brightness,
+ .multicolor_brightness_fn = lp5569_multicolor_brightness,
+ .set_led_current = lp5569_set_led_current,
+ .firmware_cb = lp5569_firmware_loaded,
+ .run_engine = lp5569_run_engine,
+ .dev_attr_group = &lp5569_group,
+};
+
+static int lp5569_probe(struct i2c_client *client)
+{
+ struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
+ const struct i2c_device_id *id = i2c_client_get_device_id(client);
+ struct device_node *np = dev_of_node(&client->dev);
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ int ret;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->cfg = &lp5569_cfg;
+
+ if (!pdata) {
+ if (np) {
+ pdata = lp55xx_of_populate_pdata(&client->dev, np,
+ chip);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+ }
+
+ led = devm_kcalloc(&client->dev,
+ pdata->num_channels, sizeof(*led), GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ chip->cl = client;
+ chip->pdata = pdata;
+
+ mutex_init(&chip->lock);
+
+ i2c_set_clientdata(client, led);
+
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
+
+ dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
+
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_out;
+
+ ret = lp55xx_register_sysfs(chip);
+ if (ret) {
+ dev_err(&client->dev, "registering sysfs failed\n");
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ lp55xx_deinit_device(chip);
+err_init:
+ return ret;
+}
+
+static void lp5569_remove(struct i2c_client *client)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
+
+ lp5569_stop_all_engines(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_deinit_device(chip);
+}
+
+static const struct i2c_device_id lp5569_id[] = {
+ { "lp5569", LP5569 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, lp5569_id);
+
+static const struct of_device_id of_lp5569_leds_match[] = {
+ { .compatible = "ti,lp5569", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, of_lp5569_leds_match);
+
+static struct i2c_driver lp5569_driver = {
+ .driver = {
+ .name = "lp5569x",
+ .of_match_table = of_lp5569_leds_match,
+ },
+ .probe = lp5569_probe,
+ .remove = lp5569_remove,
+ .id_table = lp5569_id,
+};
+
+module_i2c_driver(lp5569_driver);
+
+MODULE_AUTHOR("Mathias Nyman <[email protected]>");
+MODULE_AUTHOR("Milo Kim <[email protected]>");
+MODULE_AUTHOR("Christian Marangi <[email protected]>");
+MODULE_DESCRIPTION("LP5569 LED engine");
+MODULE_LICENSE("GPL");
--
2.43.0
Hi Christian,
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/Christian-Marangi/dt-bindings-leds-lp55xx-Add-new-ti-lp5569-compatible/20240527-174959
base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git for-leds-next
patch link: https://lore.kernel.org/r/20240527094737.13354-3-ansuelsmth%40gmail.com
patch subject: [PATCH v3 3/3] leds: leds-lp5569: Add support for Texas Instruments LP5569
config: sparc-randconfig-r071-20240528 (https://download.01.org/0day-ci/archive/20240528/[email protected]/config)
compiler: sparc-linux-gcc (GCC) 13.2.0
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 <[email protected]>
| Reported-by: Dan Carpenter <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/
New smatch warnings:
drivers/leds/leds-lp5569.c:378 lp5569_update_program_memory() error: buffer overflow 'pattern' 128 <= 223
vim +/pattern +378 drivers/leds/leds-lp5569.c
ed7ae4f43e228c Christian Marangi 2024-05-27 340 static int lp5569_update_program_memory(struct lp55xx_chip *chip,
ed7ae4f43e228c Christian Marangi 2024-05-27 341 const u8 *data, size_t size)
ed7ae4f43e228c Christian Marangi 2024-05-27 342 {
ed7ae4f43e228c Christian Marangi 2024-05-27 343 enum lp55xx_engine_index idx = chip->engine_idx;
ed7ae4f43e228c Christian Marangi 2024-05-27 344 u8 pattern[LP5569_PROGRAM_LENGTH] = {0};
ed7ae4f43e228c Christian Marangi 2024-05-27 345 unsigned int cmd;
ed7ae4f43e228c Christian Marangi 2024-05-27 346 char c[3];
ed7ae4f43e228c Christian Marangi 2024-05-27 347 int nrchars;
ed7ae4f43e228c Christian Marangi 2024-05-27 348 int ret;
ed7ae4f43e228c Christian Marangi 2024-05-27 349 int offset = 0;
ed7ae4f43e228c Christian Marangi 2024-05-27 350 int page, i = 0;
ed7ae4f43e228c Christian Marangi 2024-05-27 351
ed7ae4f43e228c Christian Marangi 2024-05-27 352 while ((offset < size - 1) && (i < LP5569_PROGRAM_LENGTH)) {
ed7ae4f43e228c Christian Marangi 2024-05-27 353 /* separate sscanfs because length is working only for %s */
ed7ae4f43e228c Christian Marangi 2024-05-27 354 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
ed7ae4f43e228c Christian Marangi 2024-05-27 355 if (ret != 1)
ed7ae4f43e228c Christian Marangi 2024-05-27 356 goto err;
ed7ae4f43e228c Christian Marangi 2024-05-27 357
ed7ae4f43e228c Christian Marangi 2024-05-27 358 ret = sscanf(c, "%2x", &cmd);
ed7ae4f43e228c Christian Marangi 2024-05-27 359 if (ret != 1)
ed7ae4f43e228c Christian Marangi 2024-05-27 360 goto err;
ed7ae4f43e228c Christian Marangi 2024-05-27 361
ed7ae4f43e228c Christian Marangi 2024-05-27 362 pattern[i] = (u8)cmd;
ed7ae4f43e228c Christian Marangi 2024-05-27 363 offset += nrchars;
ed7ae4f43e228c Christian Marangi 2024-05-27 364 i++;
ed7ae4f43e228c Christian Marangi 2024-05-27 365 }
ed7ae4f43e228c Christian Marangi 2024-05-27 366
ed7ae4f43e228c Christian Marangi 2024-05-27 367 /* Each instruction is 16bit long. Check that length is even */
ed7ae4f43e228c Christian Marangi 2024-05-27 368 if (i % 2)
ed7ae4f43e228c Christian Marangi 2024-05-27 369 goto err;
ed7ae4f43e228c Christian Marangi 2024-05-27 370
ed7ae4f43e228c Christian Marangi 2024-05-27 371 for (page = 0; page < LP5569_PROGRAM_LENGTH / LP5569_BYTES_PER_PAGE; page++) {
ed7ae4f43e228c Christian Marangi 2024-05-27 372 /* Write to the next page each 32 bytes */
ed7ae4f43e228c Christian Marangi 2024-05-27 373 lp55xx_write(chip, LP5569_REG_PROG_PAGE_SEL,
ed7ae4f43e228c Christian Marangi 2024-05-27 374 LP5569_PAGE_ENG(idx) + page);
ed7ae4f43e228c Christian Marangi 2024-05-27 375
ed7ae4f43e228c Christian Marangi 2024-05-27 376 for (i = 0; i < LP5569_PROGRAM_LENGTH; i++) {
ed7ae4f43e228c Christian Marangi 2024-05-27 377 ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + i,
ed7ae4f43e228c Christian Marangi 2024-05-27 @378 pattern[i + (page * LP5569_BYTES_PER_PAGE)]);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
i can co up to LP5569_PROGRAM_LENGTH and "page * LP5569_BYTES_PER_PAGE"
can also go up to LP5569_PROGRAM_LENGTH. So we're 2x beyond the end of
the array.
ed7ae4f43e228c Christian Marangi 2024-05-27 379 if (ret)
ed7ae4f43e228c Christian Marangi 2024-05-27 380 return -EINVAL;
ed7ae4f43e228c Christian Marangi 2024-05-27 381 }
ed7ae4f43e228c Christian Marangi 2024-05-27 382 }
ed7ae4f43e228c Christian Marangi 2024-05-27 383
ed7ae4f43e228c Christian Marangi 2024-05-27 384
ed7ae4f43e228c Christian Marangi 2024-05-27 385 return size;
ed7ae4f43e228c Christian Marangi 2024-05-27 386
ed7ae4f43e228c Christian Marangi 2024-05-27 387 err:
ed7ae4f43e228c Christian Marangi 2024-05-27 388 dev_err(&chip->cl->dev, "wrong pattern format\n");
ed7ae4f43e228c Christian Marangi 2024-05-27 389 return -EINVAL;
ed7ae4f43e228c Christian Marangi 2024-05-27 390 }
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
On Wed, May 29, 2024 at 05:32:16PM +0300, Dan Carpenter wrote:
> Hi Christian,
>
> 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/Christian-Marangi/dt-bindings-leds-lp55xx-Add-new-ti-lp5569-compatible/20240527-174959
> base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git for-leds-next
> patch link: https://lore.kernel.org/r/20240527094737.13354-3-ansuelsmth%40gmail.com
> patch subject: [PATCH v3 3/3] leds: leds-lp5569: Add support for Texas Instruments LP5569
> config: sparc-randconfig-r071-20240528 (https://download.01.org/0day-ci/archive/20240528/[email protected]/config)
> compiler: sparc-linux-gcc (GCC) 13.2.0
>
> 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 <[email protected]>
> | Reported-by: Dan Carpenter <[email protected]>
> | Closes: https://lore.kernel.org/r/[email protected]/
>
> New smatch warnings:
> drivers/leds/leds-lp5569.c:378 lp5569_update_program_memory() error: buffer overflow 'pattern' 128 <= 223
>
> vim +/pattern +378 drivers/leds/leds-lp5569.c
>
> ed7ae4f43e228c Christian Marangi 2024-05-27 340 static int lp5569_update_program_memory(struct lp55xx_chip *chip,
> ed7ae4f43e228c Christian Marangi 2024-05-27 341 const u8 *data, size_t size)
> ed7ae4f43e228c Christian Marangi 2024-05-27 342 {
> ed7ae4f43e228c Christian Marangi 2024-05-27 343 enum lp55xx_engine_index idx = chip->engine_idx;
> ed7ae4f43e228c Christian Marangi 2024-05-27 344 u8 pattern[LP5569_PROGRAM_LENGTH] = {0};
> ed7ae4f43e228c Christian Marangi 2024-05-27 345 unsigned int cmd;
> ed7ae4f43e228c Christian Marangi 2024-05-27 346 char c[3];
> ed7ae4f43e228c Christian Marangi 2024-05-27 347 int nrchars;
> ed7ae4f43e228c Christian Marangi 2024-05-27 348 int ret;
> ed7ae4f43e228c Christian Marangi 2024-05-27 349 int offset = 0;
> ed7ae4f43e228c Christian Marangi 2024-05-27 350 int page, i = 0;
> ed7ae4f43e228c Christian Marangi 2024-05-27 351
> ed7ae4f43e228c Christian Marangi 2024-05-27 352 while ((offset < size - 1) && (i < LP5569_PROGRAM_LENGTH)) {
> ed7ae4f43e228c Christian Marangi 2024-05-27 353 /* separate sscanfs because length is working only for %s */
> ed7ae4f43e228c Christian Marangi 2024-05-27 354 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
> ed7ae4f43e228c Christian Marangi 2024-05-27 355 if (ret != 1)
> ed7ae4f43e228c Christian Marangi 2024-05-27 356 goto err;
> ed7ae4f43e228c Christian Marangi 2024-05-27 357
> ed7ae4f43e228c Christian Marangi 2024-05-27 358 ret = sscanf(c, "%2x", &cmd);
> ed7ae4f43e228c Christian Marangi 2024-05-27 359 if (ret != 1)
> ed7ae4f43e228c Christian Marangi 2024-05-27 360 goto err;
> ed7ae4f43e228c Christian Marangi 2024-05-27 361
> ed7ae4f43e228c Christian Marangi 2024-05-27 362 pattern[i] = (u8)cmd;
> ed7ae4f43e228c Christian Marangi 2024-05-27 363 offset += nrchars;
> ed7ae4f43e228c Christian Marangi 2024-05-27 364 i++;
> ed7ae4f43e228c Christian Marangi 2024-05-27 365 }
> ed7ae4f43e228c Christian Marangi 2024-05-27 366
> ed7ae4f43e228c Christian Marangi 2024-05-27 367 /* Each instruction is 16bit long. Check that length is even */
> ed7ae4f43e228c Christian Marangi 2024-05-27 368 if (i % 2)
> ed7ae4f43e228c Christian Marangi 2024-05-27 369 goto err;
> ed7ae4f43e228c Christian Marangi 2024-05-27 370
> ed7ae4f43e228c Christian Marangi 2024-05-27 371 for (page = 0; page < LP5569_PROGRAM_LENGTH / LP5569_BYTES_PER_PAGE; page++) {
> ed7ae4f43e228c Christian Marangi 2024-05-27 372 /* Write to the next page each 32 bytes */
> ed7ae4f43e228c Christian Marangi 2024-05-27 373 lp55xx_write(chip, LP5569_REG_PROG_PAGE_SEL,
> ed7ae4f43e228c Christian Marangi 2024-05-27 374 LP5569_PAGE_ENG(idx) + page);
> ed7ae4f43e228c Christian Marangi 2024-05-27 375
> ed7ae4f43e228c Christian Marangi 2024-05-27 376 for (i = 0; i < LP5569_PROGRAM_LENGTH; i++) {
> ed7ae4f43e228c Christian Marangi 2024-05-27 377 ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + i,
> ed7ae4f43e228c Christian Marangi 2024-05-27 @378 pattern[i + (page * LP5569_BYTES_PER_PAGE)]);
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> i can co up to LP5569_PROGRAM_LENGTH and "page * LP5569_BYTES_PER_PAGE"
> can also go up to LP5569_PROGRAM_LENGTH. So we're 2x beyond the end of
> the array.
>
Yes the second loop max value should have been LP5569_BYTES_PER_PAGE,
totally a copy paste error on my side.
Thanks a lot for warning about this bug, will send new version with this
fixed.
> ed7ae4f43e228c Christian Marangi 2024-05-27 379 if (ret)
> ed7ae4f43e228c Christian Marangi 2024-05-27 380 return -EINVAL;
> ed7ae4f43e228c Christian Marangi 2024-05-27 381 }
> ed7ae4f43e228c Christian Marangi 2024-05-27 382 }
> ed7ae4f43e228c Christian Marangi 2024-05-27 383
> ed7ae4f43e228c Christian Marangi 2024-05-27 384
> ed7ae4f43e228c Christian Marangi 2024-05-27 385 return size;
> ed7ae4f43e228c Christian Marangi 2024-05-27 386
> ed7ae4f43e228c Christian Marangi 2024-05-27 387 err:
> ed7ae4f43e228c Christian Marangi 2024-05-27 388 dev_err(&chip->cl->dev, "wrong pattern format\n");
> ed7ae4f43e228c Christian Marangi 2024-05-27 389 return -EINVAL;
> ed7ae4f43e228c Christian Marangi 2024-05-27 390 }
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>
--
Ansuel