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SubjectRe: [PATCH] rtc: rv3028: new driver
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On 1/30/19 4:00 PM, Alexandre Belloni wrote:
> Add a driver for the MicroCrystal RV-3028.

Some additional information in the commit message won't hurt.

> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
> ---
> Documentation/devicetree/bindings/rtc/rtc.txt | 1 +
> drivers/rtc/Kconfig | 9 +
> drivers/rtc/Makefile | 1 +
> drivers/rtc/rtc-rv3028.c | 732 ++++++++++++++++++
> 4 files changed, 743 insertions(+)
> create mode 100644 drivers/rtc/rtc-rv3028.c
>
> diff --git a/Documentation/devicetree/bindings/rtc/rtc.txt b/Documentation/devicetree/bindings/rtc/rtc.txt
> index d86e2850fe1c..3e6a215e7304 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc.txt
> @@ -52,6 +52,7 @@ emmicro,em3027 EM Microelectronic EM3027 Real-time Clock
> isil,isl1208 Intersil ISL1208 Low Power RTC with Battery Backed SRAM
> isil,isl1218 Intersil ISL1218 Low Power RTC with Battery Backed SRAM
> isil,isl12022 Intersil ISL12022 Real-time Clock
> +microcrystal,rv3028 Real Time Clock Module with I2C-Bus

Shouldn't this be a separate patch ?

> microcrystal,rv3029 Real Time Clock Module with I2C-Bus
> microcrystal,rv8523 Real Time Clock
> nxp,pcf2127 Real-time clock
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index faa9ae1a3062..845c7eef548a 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -626,6 +626,15 @@ config RTC_DRV_EM3027
> This driver can also be built as a module. If so, the module
> will be called rtc-em3027.
>
> +config RTC_DRV_RV3028
> + tristate "Micro Crystal RV3028"
> + help
> + If you say yes here you get support for the Micro Crystal
> + RV3028.
> +
> + This driver can also be built as a module. If so, the module
> + will be called rtc-rv3028.
> +
> config RTC_DRV_RV8803
> tristate "Micro Crystal RV8803, Epson RX8900"
> help
> diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
> index faca02109aaa..a701d68bb5ca 100644
> --- a/drivers/rtc/Makefile
> +++ b/drivers/rtc/Makefile
> @@ -138,6 +138,7 @@ obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
> obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
> obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
> obj-$(CONFIG_RTC_DRV_RTD119X) += rtc-rtd119x.o
> +obj-$(CONFIG_RTC_DRV_RV3028) += rtc-rv3028.o
> obj-$(CONFIG_RTC_DRV_RV3029C2) += rtc-rv3029c2.o
> obj-$(CONFIG_RTC_DRV_RV8803) += rtc-rv8803.o
> obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o
> diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c
> new file mode 100644
> index 000000000000..cd1600feaed1
> --- /dev/null
> +++ b/drivers/rtc/rtc-rv3028.c
> @@ -0,0 +1,732 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * RTC driver for the Micro Crystal RV3028
> + *
> + * Copyright (C) 2018 Micro Crystal SA

2019 ?

> + * Alexandre Belloni <alexandre.belloni@bootlin.com>
> + *
> + */
> +
> +#include <linux/bcd.h>
> +#include <linux/bitops.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/log2.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/rtc.h>
> +
> +#define RV3028_SEC 0x00
> +#define RV3028_MIN 0x01
> +#define RV3028_HOUR 0x02
> +#define RV3028_WDAY 0x03
> +#define RV3028_DAY 0x04
> +#define RV3028_MONTH 0x05
> +#define RV3028_YEAR 0x06
> +#define RV3028_ALARM_MIN 0x07
> +#define RV3028_ALARM_HOUR 0x08
> +#define RV3028_ALARM_DAY 0x09
> +#define RV3028_STATUS 0x0E
> +#define RV3028_CTRL1 0x0F
> +#define RV3028_CTRL2 0x10
> +#define RV3028_EVT_CTRL 0x13
> +#define RV3028_TS_COUNT 0x14
> +#define RV3028_TS_SEC 0x15
> +#define RV3028_RAM1 0x1F
> +#define RV3028_EEPROM_ADDR 0x25
> +#define RV3028_EEPROM_DATA 0x26
> +#define RV3028_EEPROM_CMD 0x27
> +#define RV3028_CLKOUT 0x35
> +#define RV3028_OFFSET 0x36
> +#define RV3028_BACKUP 0x37
> +
> +#define RV3028_STATUS_PORF BIT(0)
> +#define RV3028_STATUS_EVF BIT(1)
> +#define RV3028_STATUS_AF BIT(2)
> +#define RV3028_STATUS_TF BIT(3)
> +#define RV3028_STATUS_UF BIT(4)
> +#define RV3028_STATUS_BSF BIT(5)
> +#define RV3028_STATUS_CLKF BIT(6)
> +#define RV3028_STATUS_EEBUSY BIT(7)
> +
> +#define RV3028_CTRL1_EERD BIT(3)
> +#define RV3028_CTRL1_WADA BIT(5)
> +
> +#define RV3028_CTRL2_RESET BIT(0)
> +#define RV3028_CTRL2_12_24 BIT(1)
> +#define RV3028_CTRL2_EIE BIT(2)
> +#define RV3028_CTRL2_AIE BIT(3)
> +#define RV3028_CTRL2_TIE BIT(4)
> +#define RV3028_CTRL2_UIE BIT(5)
> +#define RV3028_CTRL2_TSE BIT(7)
> +
> +#define RV3028_EVT_CTRL_TSR BIT(2)
> +
> +#define RV3028_EEPROM_CMD_WRITE 0x21
> +#define RV3028_EEPROM_CMD_READ 0x22
> +
> +#define RV3028_EEBUSY_POLL 10000
> +#define RV3028_EEBUSY_TIMEOUT 100000
> +
> +#define RV3028_BACKUP_TCE BIT(5)
> +#define RV3028_BACKUP_TCR_MASK GENMASK(1,0)
> +
> +#define OFFSET_STEP_PPT 953674
> +
> +enum rv3028_type {
> + rv_3028,
> +};
> +
> +struct rv3028_data {
> + struct regmap *regmap;
> + struct rtc_device *rtc;
> + enum rv3028_type type;
> +};
> +
> +static u32 rv3028_trickle_resistors[] = {1000, 3000, 6000, 11000};

u16 ?

The rest looks good to me.

--
Best regards,
Marek Vasut

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