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M2351: Fix delay code with RTC clock source 

Explicitly configure RTC clock source to LXT
pull/12424/head
Chun-Chieh Li 2020-02-11 16:17:51 +08:00
parent 28495bb075
commit 834e1aad60
1 changed files with 13 additions and 11 deletions
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24
targets/TARGET_NUVOTON/TARGET_M2351/rtc_api.c
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@ -29,10 +29,13 @@
#include "tfm_ns_lock.h" #include "tfm_ns_lock.h"
#endif #endif
/* NOTE: BSP RTC driver judges secure/non-secure RTC by PC. This implementation cannot support non-secure RTC /* Secure attribution of RTC
* controlled by secure executable. A better way would be that secure/non-secure RTC base is passed *
* to RTC API as an argument like most other APIs. With BSP RTC driver unchanged, we must enforce * We need RTC to be secure for security concern.
* secure RTC. */ *
* On M2351, configured to secure
* On M2351, hard-wired to secure
*/
#if defined(SCU_INIT_PNSSET2_VAL) && (SCU_INIT_PNSSET2_VAL & (1 << 1)) #if defined(SCU_INIT_PNSSET2_VAL) && (SCU_INIT_PNSSET2_VAL & (1 << 1))
#error("Limited by BSP/RTC, we can only support secure RTC.") #error("Limited by BSP/RTC, we can only support secure RTC.")
#endif #endif
@ -70,7 +73,7 @@ void rtc_write(time_t t)
* *
* NOTE: This dependents on real hardware. * NOTE: This dependents on real hardware.
*/ */
#define NU_RTCCLK_PER_SEC ((CLK->CLKSEL3 & CLK_CLKSEL3_SC0SEL_Msk) ? __LIRC : __LXT) #define NU_RTCCLK_PER_SEC (__LXT)
/* Strategy for implementation of RTC HAL /* Strategy for implementation of RTC HAL
* *
@ -124,7 +127,7 @@ static time_t t_write = 0;
/* Convert date time from H/W RTC to struct TM */ /* Convert date time from H/W RTC to struct TM */
static void rtc_convert_datetime_hwrtc_to_tm(struct tm *datetime_tm, const S_RTC_TIME_DATA_T *datetime_hwrtc); static void rtc_convert_datetime_hwrtc_to_tm(struct tm *datetime_tm, const S_RTC_TIME_DATA_T *datetime_hwrtc);
static const struct nu_modinit_s rtc_modinit = {RTC_0, RTC_MODULE, 0, 0, 0, RTC_IRQn, NULL}; static const struct nu_modinit_s rtc_modinit = {RTC_0, RTC_MODULE, CLK_CLKSEL3_RTCSEL_LXT, 0, 0, RTC_IRQn, NULL};
static void rtc_init_impl(void); static void rtc_init_impl(void);
static void rtc_free_impl(void); static void rtc_free_impl(void);
@ -151,11 +154,10 @@ static void rtc_free_impl(void)
static int32_t rtc_isenabled_impl(void) static int32_t rtc_isenabled_impl(void)
{ {
// NOTE: To access (RTC) registers, clock must be enabled first. // To access (RTC) registers, clock must be enabled first.
if (! (CLK->APBCLK0 & CLK_APBCLK0_RTCCKEN_Msk)) { // For TZ, with RTC being secure, we needn't call the secure gateway versions.
// Enable IP clock CLK_EnableModuleClock(rtc_modinit.clkidx);
CLK_EnableModuleClock_S(rtc_modinit.clkidx); CLK_SetModuleClock(rtc_modinit.clkidx, rtc_modinit.clksrc, rtc_modinit.clkdiv);
}
RTC_T *rtc_base = (RTC_T *) NU_MODBASE(rtc_modinit.modname); RTC_T *rtc_base = (RTC_T *) NU_MODBASE(rtc_modinit.modname);