soc/mediatek: rtc: Use `bool` as return type

BUG=b:176307061
TEST=emerge-asurada coreboot; emerge-kukui coreboot emerge-oak coreboot
     boot to shell on Asurada

Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Change-Id: Id31fa04edc2920c1767d9f08ab7af0ab4a15bc24
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49137
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/soc/mediatek/common/include/soc/rtc_common.h

@@ -6,6 +6,7 @@
 #include <bcd.h>
 #include <console/console.h>
 #include <rtc.h>
+#include <stdbool.h>
 
 #define RTCTAG			"[RTC]"
 #define rtc_info(fmt, arg ...)	printk(BIOS_INFO, RTCTAG "%s,%d: " fmt, \
@@ -94,14 +95,13 @@ enum {
 };
 
 /* external API */
-int rtc_busy_wait(void);
-int rtc_write_trigger(void);
-int rtc_writeif_unlock(void);
-int rtc_xosc_write(u16 val);
-int rtc_lpen(u16 con);
-int rtc_reg_init(void);
+bool rtc_write_trigger(void);
+bool rtc_writeif_unlock(void);
+bool rtc_xosc_write(u16 val);
+bool rtc_lpen(u16 con);
+bool rtc_reg_init(void);
 void rtc_osc_init(void);
-int rtc_powerkey_init(void);
+bool rtc_powerkey_init(void);
 void rtc_boot_common(void);
 
 #endif /* SOC_MEDIATEK_RTC_COMMON_H */

src/soc/mediatek/common/rtc.c

@@ -5,7 +5,7 @@
 #include <timer.h>
 
 /* ensure rtc write success */
-int rtc_busy_wait(void)
+static bool rtc_busy_wait(void)
 {
 	struct stopwatch sw;
 	u16 bbpu;
@@ -17,30 +17,30 @@ int rtc_busy_wait(void)
 		/* Time > 1sec, time out and set recovery mode enable.*/
 		if (stopwatch_expired(&sw)) {
 			rtc_info("BBPU CBUSY time out !!\n");
-			return 0;
+			return false;
 		}
 	} while (bbpu & RTC_BBPU_CBUSY);
 
-	return 1;
+	return true;
 }
 
-int rtc_write_trigger(void)
+bool rtc_write_trigger(void)
 {
 	rtc_write(RTC_WRTGR, 1);
 	return rtc_busy_wait();
 }
 
 /* unlock rtc write interface */
-int rtc_writeif_unlock(void)
+bool rtc_writeif_unlock(void)
 {
 	rtc_write(RTC_PROT, RTC_PROT_UNLOCK1);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 	rtc_write(RTC_PROT, RTC_PROT_UNLOCK2);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
-	return 1;
+	return true;
 }
 
 /* set rtc time */
@@ -71,20 +71,20 @@ int rtc_get(struct rtc_time *time)
 }
 
 /* set rtc xosc setting */
-int rtc_xosc_write(u16 val)
+bool rtc_xosc_write(u16 val)
 {
 	u16 bbpu;
 
 	rtc_write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK1);
 	if (!rtc_busy_wait())
-		return 0;
+		return false;
 	rtc_write(RTC_OSC32CON, RTC_OSC32CON_UNLOCK2);
 	if (!rtc_busy_wait())
-		return 0;
+		return false;
 
 	rtc_write(RTC_OSC32CON, val);
 	if (!rtc_busy_wait())
-		return 0;
+		return false;
 
 	rtc_read(RTC_BBPU, &bbpu);
 	bbpu |= RTC_BBPU_KEY | RTC_BBPU_RELOAD;
@@ -94,31 +94,31 @@ int rtc_xosc_write(u16 val)
 }
 
 /* enable lpd subroutine */
-int rtc_lpen(u16 con)
+bool rtc_lpen(u16 con)
 {
 	con &= ~RTC_CON_LPRST;
 	rtc_write(RTC_CON, con);
 
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	con |= RTC_CON_LPRST;
 	rtc_write(RTC_CON, con);
 
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	con &= ~RTC_CON_LPRST;
 	rtc_write(RTC_CON, con);
 
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
-	return 1;
+	return true;
 }
 
 /* initialize rtc related registers */
-int rtc_reg_init(void)
+bool rtc_reg_init(void)
 {
 	u16 irqsta;
 
@@ -136,7 +136,7 @@ int rtc_reg_init(void)
 	rtc_write(RTC_DIFF, 0);
 	rtc_write(RTC_CALI, 0);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	rtc_read(RTC_IRQ_STA, &irqsta);  /* read clear */
 
@@ -153,7 +153,7 @@ int rtc_reg_init(void)
 }
 
 /* write powerkeys to enable rtc functions */
-int rtc_powerkey_init(void)
+bool rtc_powerkey_init(void)
 {
 	rtc_write(RTC_POWERKEY1, RTC_POWERKEY1_KEY);
 	rtc_write(RTC_POWERKEY2, RTC_POWERKEY2_KEY);

src/soc/mediatek/mt8173/include/soc/rtc.h

@@ -5,6 +5,7 @@
 
 #include <soc/pmic_wrap_common.h>
 #include <soc/rtc_common.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include "mt6391.h"
 

src/soc/mediatek/mt8173/rtc.c

@@ -10,7 +10,7 @@
 #define RTC_GPIO_USER_MASK	  ((1 << 13) - (1 << 8))
 
 /* initialize rtc related gpio */
-static int rtc_gpio_init(void)
+static bool rtc_gpio_init(void)
 {
 	u16 con;
 
@@ -41,21 +41,21 @@ void rtc_osc_init(void)
 }
 
 /* low power detect setting */
-static int rtc_lpd_init(void)
+static bool rtc_lpd_init(void)
 {
 	pwrap_write_field(RTC_CON, RTC_CON_LPEN, RTC_CON_LPRST, 0);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	pwrap_write_field(RTC_CON, RTC_CON_LPRST, 0, 0);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	pwrap_write_field(RTC_CON, 0, RTC_CON_LPRST, 0);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
-	return 1;
+	return true;
 }
 
 /* rtc init check */

src/soc/mediatek/mt8183/include/soc/rtc.h

@@ -5,6 +5,7 @@
 
 #include <soc/pmic_wrap_common.h>
 #include <soc/rtc_common.h>
+#include <stdbool.h>
 
 /* RTC registers */
 enum {
@@ -205,7 +206,7 @@ enum {
 /* external API */
 void rtc_bbpu_power_on(void);
 int rtc_init(int recover);
-int rtc_gpio_init(void);
+bool rtc_gpio_init(void);
 void rtc_boot(void);
 u16 rtc_get_frequency_meter(u16 val, u16 measure_src, u16 window_size);
 void mt6358_dcxo_disable_unused(void);

src/soc/mediatek/mt8183/rtc.c

@@ -11,7 +11,7 @@
 #define RTC_GPIO_USER_MASK	  ((1 << 13) - (1 << 8))
 
 /* initialize rtc setting of using dcxo clock */
-static int rtc_enable_dcxo(void)
+static bool rtc_enable_dcxo(void)
 {
 	u16 bbpu, con, osc32con, sec;
 
@@ -22,7 +22,7 @@ static int rtc_enable_dcxo(void)
 	mdelay(1);
 	if (!rtc_writeif_unlock()) {
 		rtc_info("rtc_writeif_unlock() failed\n");
-		return 0;
+		return false;
 	}
 
 	rtc_read(RTC_OSC32CON, &osc32con);
@@ -32,7 +32,7 @@ static int rtc_enable_dcxo(void)
 		    | RTC_EMB_K_EOSC32_MODE | RTC_EMBCK_SEL_OPTION;
 	if (!rtc_xosc_write(osc32con)) {
 		rtc_info("rtc_xosc_write() failed\n");
-		return 0;
+		return false;
 	}
 
 	rtc_read(RTC_CON, &con);
@@ -40,11 +40,11 @@ static int rtc_enable_dcxo(void)
 	rtc_read(RTC_AL_SEC, &sec);
 	rtc_info("con=0x%x, osc32con=0x%x, sec=0x%x\n", con, osc32con, sec);
 
-	return 1;
+	return true;
 }
 
 /* initialize rtc related gpio */
-int rtc_gpio_init(void)
+bool rtc_gpio_init(void)
 {
 	u16 con;
 
@@ -115,7 +115,7 @@ u16 rtc_get_frequency_meter(u16 val, u16 measure_src, u16 window_size)
 		rtc_read(PMIC_RG_FQMTR_CON0, &fqmtr_busy);
 		if (stopwatch_expired(&sw)) {
 			rtc_info("get frequency time out !!\n");
-			return 0;
+			return false;
 		}
 	} while (fqmtr_busy & PMIC_FQMTR_CON0_BUSY);
 
@@ -143,7 +143,7 @@ u16 rtc_get_frequency_meter(u16 val, u16 measure_src, u16 window_size)
 }
 
 /* low power detect setting */
-static int rtc_lpd_init(void)
+static bool rtc_lpd_init(void)
 {
 	u16 con, sec;
 
@@ -152,19 +152,19 @@ static int rtc_lpd_init(void)
 	sec |= RTC_LPD_OPT_F32K_CK_ALIVE;
 	rtc_write(RTC_AL_SEC, sec);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	/* init XOSC32 to detect 32k clock stop */
 	rtc_read(RTC_CON, &con);
 	con |= RTC_CON_XOSC32_LPEN;
 	if (!rtc_lpen(con))
-		return 0;
+		return false;
 
 	/* init EOSC32 to detect rtc low power */
 	rtc_read(RTC_CON, &con);
 	con |= RTC_CON_EOSC32_LPEN;
 	if (!rtc_lpen(con))
-		return 0;
+		return false;
 
 	rtc_read(RTC_CON, &con);
 	con &= ~RTC_CON_XOSC32_LPEN;
@@ -176,9 +176,9 @@ static int rtc_lpd_init(void)
 	sec |= RTC_LPD_OPT_EOSC_LPD;
 	rtc_write(RTC_AL_SEC, sec);
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
-	return 1;
+	return true;
 }
 
 static bool rtc_hw_init(void)

src/soc/mediatek/mt8192/include/soc/rtc.h

@@ -4,6 +4,7 @@
 #define SOC_MEDIATEK_MT8192_RTC_H
 
 #include <soc/pmif.h>
+#include <stdbool.h>
 
 /* RTC registers */
 enum {
@@ -224,7 +225,7 @@ void rtc_read(u16 addr, u16 *rdata);
 void rtc_write(u16 addr, u16 wdata);
 void rtc_bbpu_power_on(void);
 int rtc_init(int recover);
-int rtc_gpio_init(void);
+bool rtc_gpio_init(void);
 void rtc_boot(void);
 u16 rtc_get_frequency_meter(u16 val, u16 measure_src, u16 window_size);
 void mt6359_dcxo_disable_unused(void);

src/soc/mediatek/mt8192/rtc.c

@@ -41,11 +41,11 @@ static void rtc_write_field(u16 reg, u16 val, u16 mask, u16 shift)
 }
 
 /* initialize rtc setting of using dcxo clock */
-static int rtc_enable_dcxo(void)
+static bool rtc_enable_dcxo(void)
 {
 	if (!rtc_writeif_unlock()) {
 		rtc_info("rtc_writeif_unlock() failed\n");
-		return 0;
+		return false;
 	}
 
 	u16 bbpu, con, osc32con, sec;
@@ -58,18 +58,18 @@ static int rtc_enable_dcxo(void)
 
 	if (!rtc_xosc_write(osc32con)) {
 		rtc_info("rtc_xosc_write() failed\n");
-		return 0;
+		return false;
 	}
 
 	rtc_read(RTC_CON, &con);
 	rtc_read(RTC_OSC32CON, &osc32con);
 	rtc_read(RTC_AL_SEC, &sec);
 	rtc_info("con=%#x, osc32con=%#x, sec=%#x\n", con, osc32con, sec);
-	return 1;
+	return true;
 }
 
 /* initialize rtc related gpio */
-int rtc_gpio_init(void)
+bool rtc_gpio_init(void)
 {
 	u16 con;
 
@@ -134,7 +134,7 @@ u16 rtc_get_frequency_meter(u16 val, u16 measure_src, u16 window_size)
 		rtc_read(PMIC_RG_FQMTR_CON0, &fqmtr_busy);
 		if (stopwatch_expired(&sw)) {
 			rtc_info("get frequency time out!\n");
-			return 0;
+			return false;
 		}
 	} while (fqmtr_busy & PMIC_FQMTR_CON0_BUSY);
 
@@ -162,7 +162,7 @@ u16 rtc_get_frequency_meter(u16 val, u16 measure_src, u16 window_size)
 }
 
 /* low power detect setting */
-static int rtc_lpd_init(void)
+static bool rtc_lpd_init(void)
 {
 	u16 con, sec;
 
@@ -172,26 +172,26 @@ static int rtc_lpd_init(void)
 	rtc_write(RTC_AL_SEC, sec);
 
 	if (!rtc_write_trigger())
-		return 0;
+		return false;
 
 	/* init XOSC32 to detect 32k clock stop */
 	rtc_read(RTC_CON, &con);
 	con |= RTC_CON_XOSC32_LPEN;
 
 	if (!rtc_lpen(con))
-		return 0;
+		return false;
 
 	/* init EOSC32 to detect rtc low power */
 	rtc_read(RTC_CON, &con);
 	con |= RTC_CON_EOSC32_LPEN;
 
 	if (!rtc_lpen(con))
-		return 0;
+		return false;
 
 	rtc_read(RTC_CON, &con);
 	rtc_info("check RTC_CON_LPSTA_RAW after LP init: %#x\n", con);
 
-	return 1;
+	return true;
 }
 
 static bool rtc_hw_init(void)