linux-kernel - Re: [PATCH v7 1/4] mfd: RK808: Add RK818 support

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Date:	Thu, 18 Aug 2016 15:34:40 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Wadim Egorov <w.egorov@...tec.de>
Cc:	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	devicetree@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	dianders@...omium.org, zyw@...k-chips.com, robh+dt@...nel.org,
	mark.rutland@....com, lgirdwood@...il.com, broonie@...nel.org,
	a.zummo@...ertech.it, alexandre.belloni@...e-electrons.com
Subject: Re: [PATCH v7 1/4] mfd: RK808: Add RK818 support

On Wed, 10 Aug 2016, Wadim Egorov wrote:

> The RK818 chip is a Power Management IC (PMIC) for multimedia and handheld
> devices. It contains the following components:
> 
> - Regulators
> - RTC
> - Clocking
> - Battery support
> 
> Both RK808 and RK818 chips are using a similar register map,
> so we can reuse the RTC and Clocking functionality.
> 
> Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
> Tested-by: Andy Yan <andy.yan@...k-chips.com>
> ---
> Changes since v6:
> - Squashed in the patch
>   mfd: RK808: Fetch PMIC variant from chip id register
> 
> ---
>  drivers/mfd/Kconfig       |   4 +-
>  drivers/mfd/rk808.c       | 226 +++++++++++++++++++++++++++++++++++++++-------
>  include/linux/mfd/rk808.h | 154 +++++++++++++++++++++++++++++--
>  3 files changed, 342 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 2d1fb64..a55be95 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -852,13 +852,13 @@ config MFD_RC5T583
>  	  different functionality of the device.
>  
>  config MFD_RK808
> -	tristate "Rockchip RK808 Power Management chip"
> +	tristate "Rockchip RK808/RK818 Power Management Chip"
>  	depends on I2C && OF
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
>  	help
> -	  If you say yes here you get support for the RK808
> +	  If you say yes here you get support for the RK808 and RK818
>  	  Power Management chips.
>  	  This driver provides common support for accessing the device
>  	  through I2C interface. The device supports multiple sub-devices
> diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
> index 49d7f62..fbec1d8 100644
> --- a/drivers/mfd/rk808.c
> +++ b/drivers/mfd/rk808.c
> @@ -1,11 +1,15 @@
>  /*
> - * MFD core driver for Rockchip RK808
> + * MFD core driver for Rockchip RK808/RK818
>   *
>   * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
>   *
>   * Author: Chris Zhong <zyw@...k-chips.com>
>   * Author: Zhang Qing <zhangqing@...k-chips.com>
>   *
> + * Copyright (C) 2016 PHYTEC Messtechnik GmbH
> + *
> + * Author: Wadim Egorov <w.egorov@...tec.de>
> + *
>   * This program is free software; you can redistribute it and/or modify it
>   * under the terms and conditions of the GNU General Public License,
>   * version 2, as published by the Free Software Foundation.
> @@ -22,6 +26,7 @@
>  #include <linux/mfd/core.h>
>  #include <linux/module.h>
>  #include <linux/regmap.h>
> +#include <linux/of_device.h>

Alphabetical.

>  struct rk808_reg_data {
>  	int addr;
> @@ -57,6 +62,14 @@ static bool rk808_is_volatile_reg(struct device *dev, unsigned int reg)
>  	return false;
>  }
>  
> +static const struct regmap_config rk818_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = RK818_USB_CTRL_REG,
> +	.cache_type = REGCACHE_RBTREE,
> +	.volatile_reg = rk808_is_volatile_reg,
> +};
> +
>  static const struct regmap_config rk808_regmap_config = {
>  	.reg_bits = 8,
>  	.val_bits = 8,
> @@ -79,11 +92,21 @@ static const struct mfd_cell rk808s[] = {
>  	{
>  		.name = "rk808-rtc",
>  		.num_resources = ARRAY_SIZE(rtc_resources),
> -		.resources = &rtc_resources[0],
> +		.resources = rtc_resources,

?

>  	},
>  };

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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