mfd: db8500-prcmu: Fold dbx500 header into db8500

Move the DBx500 PRCMU definitions into the DB8500 PRCMU
header and delete the wrapper header.

Convert users of simple PRCMU wrappers to call the DB8500 helpers
directly.

The dbx500-prcmu.h header was the result of an earlier attempt to
abstract several DBx5x SoC PRCMU units to use the same abstract
header. They are deleted from the kernel and this is not just
causing maintenance burden and build errors.

The stub code is using -ENOSYS in a way checkpatch complains about
so replace these with -EINVAL while we're at it.

Assisted-by: Codex:gpt-5-5
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202606180825.vUSQntkJ-lkp@intel.com/
Signed-off-by: Linus Walleij <linusw@kernel.org>
Acked-by: Brian Masney <bmasney@redhat.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/oe-kbuild-all/202606180825.vUSQntkJ-lkp@intel.com/
Link: https://patch.msgid.link/20260619-mfd-prcmu-merge-headers-v1-1-8ea0ee23b4d6@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>

8 files changed, 40 insertions, 40 deletions

diff --git a/drivers/clk/ux500/clk-prcmu.c b/drivers/clk/ux500/clk-prcmu.c
index ddc86551bf57..ac96c46bd1bb 100644
--- a/drivers/clk/ux500/clk-prcmu.c
+++ b/drivers/clk/ux500/clk-prcmu.c
@@ -7,7 +7,7 @@
  */
 
 #include <linux/clk-provider.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 #include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/err.h>
@@ -35,13 +35,13 @@ static int clk_prcmu_prepare(struct clk_hw *hw)
 {
 	struct clk_prcmu *clk = to_clk_prcmu(hw);
 
-	return prcmu_request_clock(clk->cg_sel, true);
+	return db8500_prcmu_request_clock(clk->cg_sel, true);
 }
 
 static void clk_prcmu_unprepare(struct clk_hw *hw)
 {
 	struct clk_prcmu *clk = to_clk_prcmu(hw);
-	if (prcmu_request_clock(clk->cg_sel, false))
+	if (db8500_prcmu_request_clock(clk->cg_sel, false))
 		pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
 		       clk_hw_get_name(hw));
 }
@@ -86,7 +86,7 @@ static int clk_prcmu_opp_prepare(struct clk_hw *hw)
 		clk->opp_requested = 1;
 	}
 
-	err = prcmu_request_clock(clk->cg_sel, true);
+	err = db8500_prcmu_request_clock(clk->cg_sel, true);
 	if (err) {
 		prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP,
 					(char *)clk_hw_get_name(hw));
@@ -101,7 +101,7 @@ static void clk_prcmu_opp_unprepare(struct clk_hw *hw)
 {
 	struct clk_prcmu *clk = to_clk_prcmu(hw);
 
-	if (prcmu_request_clock(clk->cg_sel, false)) {
+	if (db8500_prcmu_request_clock(clk->cg_sel, false)) {
 		pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
 			clk_hw_get_name(hw));
 		return;
@@ -120,7 +120,7 @@ static int clk_prcmu_opp_volt_prepare(struct clk_hw *hw)
 	struct clk_prcmu *clk = to_clk_prcmu(hw);
 
 	if (!clk->opp_requested) {
-		err = prcmu_request_ape_opp_100_voltage(true);
+		err = db8500_prcmu_request_ape_opp_100_voltage(true);
 		if (err) {
 			pr_err("clk_prcmu: %s fail req APE OPP VOLT for %s.\n",
 				__func__, clk_hw_get_name(hw));
@@ -129,9 +129,9 @@ static int clk_prcmu_opp_volt_prepare(struct clk_hw *hw)
 		clk->opp_requested = 1;
 	}
 
-	err = prcmu_request_clock(clk->cg_sel, true);
+	err = db8500_prcmu_request_clock(clk->cg_sel, true);
 	if (err) {
-		prcmu_request_ape_opp_100_voltage(false);
+		db8500_prcmu_request_ape_opp_100_voltage(false);
 		clk->opp_requested = 0;
 		return err;
 	}
@@ -143,14 +143,14 @@ static void clk_prcmu_opp_volt_unprepare(struct clk_hw *hw)
 {
 	struct clk_prcmu *clk = to_clk_prcmu(hw);
 
-	if (prcmu_request_clock(clk->cg_sel, false)) {
+	if (db8500_prcmu_request_clock(clk->cg_sel, false)) {
 		pr_err("clk_prcmu: %s failed to disable %s.\n", __func__,
 			clk_hw_get_name(hw));
 		return;
 	}
 
 	if (clk->opp_requested) {
-		prcmu_request_ape_opp_100_voltage(false);
+		db8500_prcmu_request_ape_opp_100_voltage(false);
 		clk->opp_requested = 0;
 	}
 }
diff --git a/drivers/clk/ux500/u8500_of_clk.c b/drivers/clk/ux500/u8500_of_clk.c
index 6f78808387b1..d2499815226f 100644
--- a/drivers/clk/ux500/u8500_of_clk.c
+++ b/drivers/clk/ux500/u8500_of_clk.c
@@ -9,7 +9,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/clk-provider.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 
 #include "clk.h"
 #include "prcc.h"
diff --git a/drivers/cpuidle/cpuidle-ux500.c b/drivers/cpuidle/cpuidle-ux500.c
index f7d778580e9b..6d6c52c0bcc2 100644
--- a/drivers/cpuidle/cpuidle-ux500.c
+++ b/drivers/cpuidle/cpuidle-ux500.c
@@ -11,7 +11,7 @@
 #include <linux/spinlock.h>
 #include <linux/atomic.h>
 #include <linux/smp.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 #include <linux/platform_data/arm-ux500-pm.h>
 #include <linux/platform_device.h>
 
@@ -66,7 +66,7 @@ static inline int ux500_enter_idle(struct cpuidle_device *dev,
 		/* Go to the retention state, the prcmu will wait for the
 		 * cpu to go WFI and this is what happens after exiting this
 		 * 'master' critical section */
-		if (prcmu_set_power_state(PRCMU_AP_IDLE, true, true))
+		if (db8500_prcmu_set_power_state(PRCMU_AP_IDLE, true, true))
 			goto out;
 
 		/* When we switch to retention, the prcmu is in charge
@@ -109,7 +109,7 @@ static struct cpuidle_driver ux500_idle_driver = {
 static int dbx500_cpuidle_probe(struct platform_device *pdev)
 {
 	/* Configure wake up reasons */
-	prcmu_enable_wakeups(PRCMU_WAKEUP(ARM) | PRCMU_WAKEUP(RTC) |
+	db8500_prcmu_enable_wakeups(PRCMU_WAKEUP(ARM) | PRCMU_WAKEUP(RTC) |
 			     PRCMU_WAKEUP(ABB));
 
 	return cpuidle_register(&ux500_idle_driver, NULL);
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index f0bc0b5a6f4a..86fa99022cb3 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -19,7 +19,7 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 #include <linux/of.h>
 
 /*
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 21e68a382b11..6672c55f2ebc 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -32,7 +32,7 @@
 #include <linux/platform_device.h>
 #include <linux/uaccess.h>
 #include <linux/mfd/core.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/regulator/db8500-prcmu.h>
 #include <linux/regulator/machine.h>
@@ -2285,7 +2285,7 @@ void db8500_prcmu_system_reset(u16 reset_code)
 /**
  * db8500_prcmu_get_reset_code - Retrieve SW reset reason code
  *
- * Retrieves the reset reason code stored by prcmu_system_reset() before
+ * Retrieves the reset reason code stored by db8500_prcmu_system_reset() before
  * last restart.
  */
 u16 db8500_prcmu_get_reset_code(void)
@@ -3041,7 +3041,7 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
 
 	db8500_irq_init(np);
 
-	prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
+	db8500_prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
 
 	err = mfd_add_devices(&pdev->dev, 0, common_prcmu_devs,
 			      ARRAY_SIZE(common_prcmu_devs), NULL, 0, db8500_irq_domain);
diff --git a/drivers/regulator/db8500-prcmu.c b/drivers/regulator/db8500-prcmu.c
index 1ec2e1348891..751fe36580fa 100644
--- a/drivers/regulator/db8500-prcmu.c
+++ b/drivers/regulator/db8500-prcmu.c
@@ -13,7 +13,7 @@
 #include <linux/err.h>
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/db8500-prcmu.h>
@@ -93,13 +93,13 @@ static int enable_epod(u16 epod_id, bool ramret)
 
 	if (ramret) {
 		if (!epod_on[epod_id]) {
-			ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
+			ret = db8500_prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
 			if (ret < 0)
 				return ret;
 		}
 		epod_ramret[epod_id] = true;
 	} else {
-		ret = prcmu_set_epod(epod_id, EPOD_STATE_ON);
+		ret = db8500_prcmu_set_epod(epod_id, EPOD_STATE_ON);
 		if (ret < 0)
 			return ret;
 		epod_on[epod_id] = true;
@@ -114,18 +114,18 @@ static int disable_epod(u16 epod_id, bool ramret)
 
 	if (ramret) {
 		if (!epod_on[epod_id]) {
-			ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
+			ret = db8500_prcmu_set_epod(epod_id, EPOD_STATE_OFF);
 			if (ret < 0)
 				return ret;
 		}
 		epod_ramret[epod_id] = false;
 	} else {
 		if (epod_ramret[epod_id]) {
-			ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
+			ret = db8500_prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
 			if (ret < 0)
 				return ret;
 		} else {
-			ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
+			ret = db8500_prcmu_set_epod(epod_id, EPOD_STATE_OFF);
 			if (ret < 0)
 				return ret;
 		}
diff --git a/drivers/thermal/db8500_thermal.c b/drivers/thermal/db8500_thermal.c
index 576f88b6a1b3..cf1706569e6d 100644
--- a/drivers/thermal/db8500_thermal.c
+++ b/drivers/thermal/db8500_thermal.c
@@ -10,7 +10,7 @@
 
 #include <linux/cpu_cooling.h>
 #include <linux/interrupt.h>
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -82,7 +82,7 @@ static void db8500_thermal_update_config(struct db8500_thermal_zone *th,
 					 unsigned long next_low,
 					 unsigned long next_high)
 {
-	prcmu_stop_temp_sense();
+	db8500_prcmu_stop_temp_sense();
 
 	th->cur_index = idx;
 	th->interpolated_temp = (next_low + next_high)/2;
@@ -91,8 +91,8 @@ static void db8500_thermal_update_config(struct db8500_thermal_zone *th,
 	 * The PRCMU accept absolute temperatures in celsius so divide
 	 * down the millicelsius with 1000
 	 */
-	prcmu_config_hotmon((u8)(next_low/1000), (u8)(next_high/1000));
-	prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME);
+	db8500_prcmu_config_hotmon((u8)(next_low / 1000), (u8)(next_high / 1000));
+	db8500_prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME);
 }
 
 static irqreturn_t prcmu_low_irq_handler(int irq, void *irq_data)
@@ -204,7 +204,7 @@ static int db8500_thermal_probe(struct platform_device *pdev)
 static int db8500_thermal_suspend(struct platform_device *pdev,
 		pm_message_t state)
 {
-	prcmu_stop_temp_sense();
+	db8500_prcmu_stop_temp_sense();
 
 	return 0;
 }
diff --git a/drivers/watchdog/db8500_wdt.c b/drivers/watchdog/db8500_wdt.c
index 97148ac0aa54..70ccea13288d 100644
--- a/drivers/watchdog/db8500_wdt.c
+++ b/drivers/watchdog/db8500_wdt.c
@@ -16,7 +16,7 @@
 #include <linux/watchdog.h>
 #include <linux/platform_device.h>
 
-#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 
 #define WATCHDOG_TIMEOUT 600 /* 10 minutes */
 
@@ -37,24 +37,24 @@ MODULE_PARM_DESC(nowayout,
 
 static int db8500_wdt_start(struct watchdog_device *wdd)
 {
-	return prcmu_enable_a9wdog(PRCMU_WDOG_ALL);
+	return db8500_prcmu_enable_a9wdog(PRCMU_WDOG_ALL);
 }
 
 static int db8500_wdt_stop(struct watchdog_device *wdd)
 {
-	return prcmu_disable_a9wdog(PRCMU_WDOG_ALL);
+	return db8500_prcmu_disable_a9wdog(PRCMU_WDOG_ALL);
 }
 
 static int db8500_wdt_keepalive(struct watchdog_device *wdd)
 {
-	return prcmu_kick_a9wdog(PRCMU_WDOG_ALL);
+	return db8500_prcmu_kick_a9wdog(PRCMU_WDOG_ALL);
 }
 
 static int db8500_wdt_set_timeout(struct watchdog_device *wdd,
 				 unsigned int timeout)
 {
 	db8500_wdt_stop(wdd);
-	prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
+	db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
 	db8500_wdt_start(wdd);
 
 	return 0;
@@ -91,10 +91,10 @@ static int db8500_wdt_probe(struct platform_device *pdev)
 	watchdog_set_nowayout(&db8500_wdt, nowayout);
 
 	/* disable auto off on sleep */
-	prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false);
+	db8500_prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false);
 
 	/* set HW initial value */
-	prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
+	db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
 
 	ret = devm_watchdog_register_device(dev, &db8500_wdt);
 	if (ret)
@@ -110,9 +110,9 @@ static int db8500_wdt_suspend(struct platform_device *pdev,
 {
 	if (watchdog_active(&db8500_wdt)) {
 		db8500_wdt_stop(&db8500_wdt);
-		prcmu_config_a9wdog(PRCMU_WDOG_CPU1, true);
+		db8500_prcmu_config_a9wdog(PRCMU_WDOG_CPU1, true);
 
-		prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
+		db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
 		db8500_wdt_start(&db8500_wdt);
 	}
 	return 0;
@@ -122,9 +122,9 @@ static int db8500_wdt_resume(struct platform_device *pdev)
 {
 	if (watchdog_active(&db8500_wdt)) {
 		db8500_wdt_stop(&db8500_wdt);
-		prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false);
+		db8500_prcmu_config_a9wdog(PRCMU_WDOG_CPU1, false);
 
-		prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
+		db8500_prcmu_load_a9wdog(PRCMU_WDOG_ALL, timeout * 1000);
 		db8500_wdt_start(&db8500_wdt);
 	}
 	return 0;