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rtc: ds3232/ds3231: Add support to generate 32KHz output for driver module

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Add an implementation of the rtc_enable_32khz_output() that uses the
driver model i2c APIs.

Also put code related to rtc_enable_32khz_output
under CONFIG_RTC_ENABLE_32KHZ_OUTPUT.

Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
This commit is contained in:
Chuanhua Han
2019-07-26 19:24:00 +08:00
committed by Prabhakar Kushwaha
parent 6672ab1628
commit db07c447ca
5 changed files with 32 additions and 0 deletions
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6
include/rtc.h
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@@ -166,11 +166,17 @@ int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep);
*/
int rtc_write32(struct udevice *dev, unsigned int reg, u32 value);
#ifdef CONFIG_RTC_ENABLE_32KHZ_OUTPUT
int rtc_enable_32khz_output(int busnum, int chip_addr);
#endif
#else
int rtc_get (struct rtc_time *);
int rtc_set (struct rtc_time *);
void rtc_reset (void);
#ifdef CONFIG_RTC_ENABLE_32KHZ_OUTPUT
void rtc_enable_32khz_output(void);
#endif
/**
* rtc_read8() - Read an 8-bit register