LED driver based on lp55xx have all a very similar implementation for
load_engine function. Move the function to lp55xx-common and rework the
define to be more dynamic instead of having to declare a temp array for
them.

Engine mask are the same for every LED based on lp55xx.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/leds/leds-lp5521.c        | 26 +++----------------------
 drivers/leds/leds-lp5523.c        | 26 +++----------------------
 drivers/leds/leds-lp5562.c        | 24 ++---------------------
 drivers/leds/leds-lp55xx-common.c | 32 ++++++++++++++++++++++++++++++-
 drivers/leds/leds-lp55xx-common.h |  1 +
 drivers/leds/leds-lp8501.c        | 17 ++--------------
 6 files changed, 42 insertions(+), 84 deletions(-)

diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 5015f385cc17..08db470fff6c 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -115,26 +115,6 @@ static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current)
 		led_current);
 }
 
-static void lp5521_load_engine(struct lp55xx_chip *chip)
-{
-	enum lp55xx_engine_index idx = chip->engine_idx;
-	static const u8 mask[] = {
-		[LP55XX_ENGINE_1] = LP5521_MODE_R_M,
-		[LP55XX_ENGINE_2] = LP5521_MODE_G_M,
-		[LP55XX_ENGINE_3] = LP5521_MODE_B_M,
-	};
-
-	static const u8 val[] = {
-		[LP55XX_ENGINE_1] = LP5521_LOAD_R,
-		[LP55XX_ENGINE_2] = LP5521_LOAD_G,
-		[LP55XX_ENGINE_3] = LP5521_LOAD_B,
-	};
-
-	lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]);
-
-	lp5521_wait_opmode_done();
-}
-
 static void lp5521_stop_engine(struct lp55xx_chip *chip)
 {
 	enum lp55xx_engine_index idx = chip->engine_idx;
@@ -264,7 +244,7 @@ static void lp5521_firmware_loaded(struct lp55xx_chip *chip)
 	 *  2) write firmware data into program memory
 	 */
 
-	lp5521_load_engine(chip);
+	lp55xx_load_engine(chip);
 	lp5521_update_program_memory(chip, fw->data, fw->size);
 }
 
@@ -415,7 +395,7 @@ static ssize_t store_engine_mode(struct device *dev,
 		engine->mode = LP55XX_ENGINE_RUN;
 	} else if (!strncmp(buf, "load", 4)) {
 		lp5521_stop_engine(chip);
-		lp5521_load_engine(chip);
+		lp55xx_load_engine(chip);
 		engine->mode = LP55XX_ENGINE_LOAD;
 	} else if (!strncmp(buf, "disabled", 8)) {
 		lp5521_stop_engine(chip);
@@ -441,7 +421,7 @@ static ssize_t store_engine_load(struct device *dev,
 	mutex_lock(&chip->lock);
 
 	chip->engine_idx = nr;
-	lp5521_load_engine(chip);
+	lp55xx_load_engine(chip);
 	ret = lp5521_update_program_memory(chip, buf, len);
 
 	mutex_unlock(&chip->lock);
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index bd0209e2ee42..086b4d8975a4 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -159,26 +159,6 @@ static int lp5523_post_init_device(struct lp55xx_chip *chip)
 	return lp5523_init_program_engine(chip);
 }
 
-static void lp5523_load_engine(struct lp55xx_chip *chip)
-{
-	enum lp55xx_engine_index idx = chip->engine_idx;
-	static const u8 mask[] = {
-		[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
-		[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
-		[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
-	};
-
-	static const u8 val[] = {
-		[LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
-		[LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
-		[LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
-	};
-
-	lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
-
-	lp5523_wait_opmode_done();
-}
-
 static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
 {
 	enum lp55xx_engine_index idx = chip->engine_idx;
@@ -188,7 +168,7 @@ static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
 		[LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
 	};
 
-	lp5523_load_engine(chip);
+	lp55xx_load_engine(chip);
 
 	lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
 }
@@ -425,7 +405,7 @@ static ssize_t store_engine_mode(struct device *dev,
 		engine->mode = LP55XX_ENGINE_RUN;
 	} else if (!strncmp(buf, "load", 4)) {
 		lp5523_stop_engine(chip);
-		lp5523_load_engine(chip);
+		lp55xx_load_engine(chip);
 		engine->mode = LP55XX_ENGINE_LOAD;
 	} else if (!strncmp(buf, "disabled", 8)) {
 		lp5523_stop_engine(chip);
@@ -502,7 +482,7 @@ static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
 		[LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
 	};
 
-	lp5523_load_engine(chip);
+	lp55xx_load_engine(chip);
 
 	ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
 	if (ret)
diff --git a/drivers/leds/leds-lp5562.c b/drivers/leds/leds-lp5562.c
index 65a6a05c3848..5e26a52f534f 100644
--- a/drivers/leds/leds-lp5562.c
+++ b/drivers/leds/leds-lp5562.c
@@ -124,26 +124,6 @@ static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)
 	lp55xx_write(led->chip, addr[led->chan_nr], led_current);
 }
 
-static void lp5562_load_engine(struct lp55xx_chip *chip)
-{
-	enum lp55xx_engine_index idx = chip->engine_idx;
-	static const u8 mask[] = {
-		[LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M,
-		[LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M,
-		[LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M,
-	};
-
-	static const u8 val[] = {
-		[LP55XX_ENGINE_1] = LP5562_LOAD_ENG1,
-		[LP55XX_ENGINE_2] = LP5562_LOAD_ENG2,
-		[LP55XX_ENGINE_3] = LP5562_LOAD_ENG3,
-	};
-
-	lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]);
-
-	lp5562_wait_opmode_done();
-}
-
 static void lp5562_run_engine(struct lp55xx_chip *chip, bool start)
 {
 	int ret;
@@ -270,7 +250,7 @@ static void lp5562_firmware_loaded(struct lp55xx_chip *chip)
 	 *  2) write firmware data into program memory
 	 */
 
-	lp5562_load_engine(chip);
+	lp55xx_load_engine(chip);
 	lp5562_update_firmware(chip, fw->data, fw->size);
 }
 
@@ -371,7 +351,7 @@ static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode)
 	/* Load engines */
 	for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
 		chip->engine_idx = i;
-		lp5562_load_engine(chip);
+		lp55xx_load_engine(chip);
 	}
 
 	/* Clear program registers */
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index a2ea449a1d5e..06cbdef70f9a 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -26,8 +26,24 @@
 /* OP MODE require at least 153 us to clear regs */
 #define LP55XX_CMD_SLEEP		200
 
-/* Program Commands */
+/*
+ * 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 LP55xx_MODE_DISABLE_ALL_ENG	0x0
+#define LP55xx_MODE_ENG_MASK           GENMASK(1, 0)
+#define   LP55xx_MODE_DISABLE_ENG      FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x0)
+#define   LP55xx_MODE_LOAD_ENG         FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x1)
+#define   LP55xx_MODE_RUN_ENG          FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x2)
+#define   LP55xx_MODE_HALT_ENG         FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x3)
+
+#define   LP55xx_MODE_ENGn_SHIFT(n, shift)	((shift) + (2 * (3 - (n))))
+#define   LP55xx_MODE_ENGn_MASK(n, shift)     (LP55xx_MODE_ENG_MASK << LP55xx_MODE_ENGn_SHIFT(n, shift))
+#define   LP55xx_MODE_ENGn_GET(n, mode, shift)        \
+	(((mode) >> LP55xx_MODE_ENGn_SHIFT(n, shift)) & LP55xx_MODE_ENG_MASK)
 
 /* External clock rate */
 #define LP55XX_CLK_32K			32768
@@ -77,6 +93,20 @@ void lp55xx_stop_all_engine(struct lp55xx_chip *chip)
 }
 EXPORT_SYMBOL_GPL(lp55xx_stop_all_engine);
 
+void lp55xx_load_engine(struct lp55xx_chip *chip)
+{
+	enum lp55xx_engine_index idx = chip->engine_idx;
+	const struct lp55xx_device_config *cfg = chip->cfg;
+	u8 mask, val;
+
+	mask = LP55xx_MODE_ENGn_MASK(idx, cfg->reg_op_mode.shift);
+	val = LP55xx_MODE_LOAD_ENG << LP55xx_MODE_ENGn_SHIFT(idx, cfg->reg_op_mode.shift);
+
+	lp55xx_update_bits(chip, cfg->reg_op_mode.addr, mask, val);
+	lp55xx_wait_opmode_done(chip);
+}
+EXPORT_SYMBOL_GPL(lp55xx_load_engine);
+
 static void lp55xx_reset_device(struct lp55xx_chip *chip)
 {
 	const struct lp55xx_device_config *cfg = chip->cfg;
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index 26a724acac16..bb146bcecdcf 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -202,6 +202,7 @@ extern bool lp55xx_is_extclk_used(struct lp55xx_chip *chip);
 
 /* common chip functions */
 extern void lp55xx_stop_all_engine(struct lp55xx_chip *chip);
+extern void lp55xx_load_engine(struct lp55xx_chip *chip);
 
 /* common probe/remove function */
 extern int lp55xx_probe(struct i2c_client *client);
diff --git a/drivers/leds/leds-lp8501.c b/drivers/leds/leds-lp8501.c
index d3c718bb8275..04173d6875af 100644
--- a/drivers/leds/leds-lp8501.c
+++ b/drivers/leds/leds-lp8501.c
@@ -119,17 +119,6 @@ static int lp8501_post_init_device(struct lp55xx_chip *chip)
 static void lp8501_load_engine(struct lp55xx_chip *chip)
 {
 	enum lp55xx_engine_index idx = chip->engine_idx;
-	static const u8 mask[] = {
-		[LP55XX_ENGINE_1] = LP8501_MODE_ENG1_M,
-		[LP55XX_ENGINE_2] = LP8501_MODE_ENG2_M,
-		[LP55XX_ENGINE_3] = LP8501_MODE_ENG3_M,
-	};
-
-	static const u8 val[] = {
-		[LP55XX_ENGINE_1] = LP8501_LOAD_ENG1,
-		[LP55XX_ENGINE_2] = LP8501_LOAD_ENG2,
-		[LP55XX_ENGINE_3] = LP8501_LOAD_ENG3,
-	};
 
 	static const u8 page_sel[] = {
 		[LP55XX_ENGINE_1] = LP8501_PAGE_ENG1,
@@ -137,9 +126,7 @@ static void lp8501_load_engine(struct lp55xx_chip *chip)
 		[LP55XX_ENGINE_3] = LP8501_PAGE_ENG3,
 	};
 
-	lp55xx_update_bits(chip, LP8501_REG_OP_MODE, mask[idx], val[idx]);
-
-	lp8501_wait_opmode_done();
+	lp55xx_load_engine(chip);
 
 	lp55xx_write(chip, LP8501_REG_PROG_PAGE_SEL, page_sel[idx]);
 }
@@ -287,7 +274,7 @@ static struct lp55xx_device_config lp8501_cfg = {
 	},
 	.engine_busy = {
 		.addr = LP8501_REG_STATUS,
-		.maks = LP8501_ENGINE_BUSY,
+		.mask = LP8501_ENGINE_BUSY,
 	},
 	.reset = {
 		.addr = LP8501_REG_RESET,
-- 
2.43.0

Hi Christian,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linus/master v6.10-rc3]
[cannot apply to lee-leds/for-leds-next pavel-leds/for-next next-20240613]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
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-limit-pwr-sel-property-to-ti-lp8501/20240616-071915
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20240615231152.28201-6-ansuelsmth%40gmail.com
patch subject: [PATCH v5 05/20] leds: leds-lp55xx: generalize load_engine function
config: arc-randconfig-002-20240616 (https://download.01.org/0day-ci/archive/20240616/202406161332.pjUUlreJ-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240616/202406161332.pjUUlreJ-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>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406161332.pjUUlreJ-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/leds/leds-lp55xx-common.c: In function 'lp55xx_wait_opmode_done':
   drivers/leds/leds-lp55xx-common.c:71:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
      71 |         int ret;
         |             ^~~
   drivers/leds/leds-lp55xx-common.c: In function 'lp55xx_load_engine':
>> drivers/leds/leds-lp55xx-common.c:39:40: error: implicit declaration of function 'FIELD_PREP_CONST' [-Werror=implicit-function-declaration]
      39 | #define   LP55xx_MODE_LOAD_ENG         FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x1)
         |                                        ^~~~~~~~~~~~~~~~
   drivers/leds/leds-lp55xx-common.c:103:15: note: in expansion of macro 'LP55xx_MODE_LOAD_ENG'
     103 |         val = LP55xx_MODE_LOAD_ENG << LP55xx_MODE_ENGn_SHIFT(idx, cfg->reg_op_mode.shift);
         |               ^~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for REGMAP_SPI
   Depends on [n]: SPI [=n]
   Selected by [y]:
   - AD9739A [=y] && IIO [=y] && (SPI [=n] || COMPILE_TEST [=y])


vim +/FIELD_PREP_CONST +39 drivers/leds/leds-lp55xx-common.c

    28	
    29	/*
    30	 * Program Memory Operations
    31	 * Same Mask for each engine for both mode and exec
    32	 * ENG1        GENMASK(3, 2)
    33	 * ENG2        GENMASK(5, 4)
    34	 * ENG3        GENMASK(7, 6)
    35	 */
    36	#define LP55xx_MODE_DISABLE_ALL_ENG	0x0
    37	#define LP55xx_MODE_ENG_MASK           GENMASK(1, 0)
    38	#define   LP55xx_MODE_DISABLE_ENG      FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x0)
  > 39	#define   LP55xx_MODE_LOAD_ENG         FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x1)
    40	#define   LP55xx_MODE_RUN_ENG          FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x2)
    41	#define   LP55xx_MODE_HALT_ENG         FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x3)
    42	

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

Hi Christian,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on linus/master v6.10-rc3]
[cannot apply to lee-leds/for-leds-next pavel-leds/for-next next-20240613]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
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-limit-pwr-sel-property-to-ti-lp8501/20240616-071915
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20240615231152.28201-6-ansuelsmth%40gmail.com
patch subject: [PATCH v5 05/20] leds: leds-lp55xx: generalize load_engine function
config: i386-buildonly-randconfig-001-20240616 (https://download.01.org/0day-ci/archive/20240616/202406161247.DuuZguPR-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240616/202406161247.DuuZguPR-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>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406161247.DuuZguPR-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/leds/leds-lp55xx-common.c:103:8: error: call to undeclared function 'FIELD_PREP_CONST'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     103 |         val = LP55xx_MODE_LOAD_ENG << LP55xx_MODE_ENGn_SHIFT(idx, cfg->reg_op_mode.shift);
         |               ^
   drivers/leds/leds-lp55xx-common.c:39:40: note: expanded from macro 'LP55xx_MODE_LOAD_ENG'
      39 | #define   LP55xx_MODE_LOAD_ENG         FIELD_PREP_CONST(LP55xx_MODE_ENG_MASK, 0x1)
         |                                        ^
   1 error generated.


vim +/FIELD_PREP_CONST +103 drivers/leds/leds-lp55xx-common.c

    95	
    96	void lp55xx_load_engine(struct lp55xx_chip *chip)
    97	{
    98		enum lp55xx_engine_index idx = chip->engine_idx;
    99		const struct lp55xx_device_config *cfg = chip->cfg;
   100		u8 mask, val;
   101	
   102		mask = LP55xx_MODE_ENGn_MASK(idx, cfg->reg_op_mode.shift);
 > 103		val = LP55xx_MODE_LOAD_ENG << LP55xx_MODE_ENGn_SHIFT(idx, cfg->reg_op_mode.shift);
   104	
   105		lp55xx_update_bits(chip, cfg->reg_op_mode.addr, mask, val);
   106		lp55xx_wait_opmode_done(chip);
   107	}
   108	EXPORT_SYMBOL_GPL(lp55xx_load_engine);
   109	

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