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rtc: bd70528: Support BD72720 rtc

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The BD72720 has similar RTC block as a few other ROHM PMICs.

Add support for BD72720 RTC.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://patch.msgid.link/3241773f0f8e8d8e591a8e948495686cfdee4875.1765804226.git.mazziesaccount@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Matti Vaittinen 2025-12-15 15:20:50 +02:00 • committed by Lee Jones
parent da4950b591
commit 0234e0033e
2 changed files with 16 additions and 8 deletions
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3
drivers/rtc/Kconfig
View file

@ -570,7 +570,8 @@ config RTC_DRV_BD70528
depends on MFD_ROHM_BD71828
help
If you say Y here you will get support for the RTC
block on ROHM BD71815 and BD71828 Power Management IC.
block on ROHM BD71815, BD71828 and BD72720 Power
Management ICs.
This driver can also be built as a module. If so, the module
will be called rtc-bd70528.

21
drivers/rtc/rtc-bd70528.c
View file

@ -7,6 +7,7 @@
#include <linux/bcd.h>
#include <linux/mfd/rohm-bd71815.h>
#include <linux/mfd/rohm-bd71828.h>
#include <linux/mfd/rohm-bd72720.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@ -262,13 +263,13 @@ static int bd70528_probe(struct platform_device *pdev)
/*
* See also BD718XX_ALM_EN_OFFSET:
* This works for BD71828 and BD71815 as they have same offset
* between ALM0 start and ALM0_MASK. If new ICs are to be
* added this requires proper check as ALM0_MASK is not located
* at the end of ALM0 block - but after all ALM blocks so if
* amount of ALMs differ the offset to enable/disable is likely
* to be incorrect and enable/disable must be given as own
* reg address here.
* This works for BD71828, BD71815, and BD72720 as they all
* have same offset between the ALM0 start and the ALM0_MASK.
* If new ICs are to be added this requires proper check as
* the ALM0_MASK is not located at the end of ALM0 block -
* but after all ALM blocks. If amount of ALMs differ, the
* offset to enable/disable is likely to be incorrect and
* enable/disable must be given as own reg address here.
*/
bd_rtc->bd718xx_alm_block_start = BD71815_REG_RTC_ALM_START;
hour_reg = BD71815_REG_HOUR;
@ -278,6 +279,11 @@ static int bd70528_probe(struct platform_device *pdev)
bd_rtc->bd718xx_alm_block_start = BD71828_REG_RTC_ALM_START;
hour_reg = BD71828_REG_RTC_HOUR;
break;
case ROHM_CHIP_TYPE_BD72720:
bd_rtc->reg_time_start = BD72720_REG_RTC_START;
bd_rtc->bd718xx_alm_block_start = BD72720_REG_RTC_ALM_START;
hour_reg = BD72720_REG_RTC_HOUR;
break;
default:
dev_err(&pdev->dev, "Unknown chip\n");
return -ENOENT;
@ -337,6 +343,7 @@ static int bd70528_probe(struct platform_device *pdev)
static const struct platform_device_id bd718x7_rtc_id[] = {
{ "bd71828-rtc", ROHM_CHIP_TYPE_BD71828 },
{ "bd71815-rtc", ROHM_CHIP_TYPE_BD71815 },
{ "bd72720-rtc", ROHM_CHIP_TYPE_BD72720 },
{ },
};
MODULE_DEVICE_TABLE(platform, bd718x7_rtc_id);