linux-kernel - Re: [PATCH 1/8] devfreq: rockchip-dfi: Move GRF definitions to a common place.

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Message-ID: <94d01f35-7baa-aa6a-710e-c046fcf52286@collabora.com>
Date:   Tue, 7 Aug 2018 12:50:46 +0200
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Chanwoo Choi <cw00.choi@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Will Deacon <will.deacon@....com>,
        Heiko Stuebner <heiko@...ech.de>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Sandy Huang <hjc@...k-chips.com>,
        David Airlie <airlied@...ux.ie>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Derek Basehore <dbasehore@...omium.org>,
        linux-clk@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, Lin Huang <hl@...k-chips.com>,
        kernel@...labora.com, robin.murphy@....com,
        Sean Paul <seanpaul@...omium.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/8] devfreq: rockchip-dfi: Move GRF definitions to a
 common place.

Hi,

On 01/08/18 10:36, Chanwoo Choi wrote:
> Hi Enric,
> 
> On 2018년 07월 30일 17:11, Enric Balletbo i Serra wrote:
>> Some rk3399 GRF (Generic Register Files) definitions can be used for
>> different drivers. Move these definitions to a common include so we
>> don't need to duplicate these definitions.
>>
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>> ---
>>
>> Changes in v1:
>> - [RFC 1/10] Add Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
> 
> Even if you add the changes log, you are missing my Acked-by tag.
> 

Ops, right, sorry about that. I'll fix in next version.

>> - [RFC 1/10] s/Generic/General/ (Robin Murphy)
>> - [RFC 4/10] Removed from the series. I did not found a use case where not holding the mutex causes the issue.
>> - [RFC 7/10] Removed from the series. I did not found a use case where this matters.
>>
>>  drivers/devfreq/event/rockchip-dfi.c | 23 +++++++----------------
>>  include/soc/rockchip/rk3399_grf.h    | 21 +++++++++++++++++++++
>>  2 files changed, 28 insertions(+), 16 deletions(-)
>>  create mode 100644 include/soc/rockchip/rk3399_grf.h
>>
>> diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
>> index 22b113363ffc..2fbbcbeb644f 100644
>> --- a/drivers/devfreq/event/rockchip-dfi.c
>> +++ b/drivers/devfreq/event/rockchip-dfi.c
>> @@ -26,6 +26,8 @@
>>  #include <linux/list.h>
>>  #include <linux/of.h>
>>  
>> +#include <soc/rockchip/rk3399_grf.h>
>> +
>>  #define RK3399_DMC_NUM_CH	2
>>  
>>  /* DDRMON_CTRL */
>> @@ -43,18 +45,6 @@
>>  #define DDRMON_CH1_COUNT_NUM		0x3c
>>  #define DDRMON_CH1_DFI_ACCESS_NUM	0x40
>>  
>> -/* pmu grf */
>> -#define PMUGRF_OS_REG2	0x308
>> -#define DDRTYPE_SHIFT	13
>> -#define DDRTYPE_MASK	7
>> -
>> -enum {
>> -	DDR3 = 3,
>> -	LPDDR3 = 6,
>> -	LPDDR4 = 7,
>> -	UNUSED = 0xFF
>> -};
>> -
>>  struct dmc_usage {
>>  	u32 access;
>>  	u32 total;
>> @@ -83,16 +73,17 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
>>  	u32 ddr_type;
>>  
>>  	/* get ddr type */
>> -	regmap_read(info->regmap_pmu, PMUGRF_OS_REG2, &val);
>> -	ddr_type = (val >> DDRTYPE_SHIFT) & DDRTYPE_MASK;
>> +	regmap_read(info->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
>> +	ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
>> +		    RK3399_PMUGRF_DDRTYPE_MASK;
>>  
>>  	/* clear DDRMON_CTRL setting */
>>  	writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL);
>>  
>>  	/* set ddr type to dfi */
>> -	if (ddr_type == LPDDR3)
>> +	if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
>>  		writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL);
>> -	else if (ddr_type == LPDDR4)
>> +	else if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
>>  		writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL);
>>  
>>  	/* enable count, use software mode */
>> diff --git a/include/soc/rockchip/rk3399_grf.h b/include/soc/rockchip/rk3399_grf.h
>> new file mode 100644
>> index 000000000000..3eebabcb2812
>> --- /dev/null
>> +++ b/include/soc/rockchip/rk3399_grf.h
>> @@ -0,0 +1,21 @@
>> +/* SPDX-License-Identifier: GPL-2.0+ */
>> +/*
>> + * Rockchip General Register Files definitions
>> + *
>> + * Copyright (c) 2018, Collabora Ltd.
>> + * Author: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>> + */
>> +
>> +#ifndef __SOC_RK3399_GRF_H
>> +#define __SOC_RK3399_GRF_H
>> +
>> +/* PMU GRF Registers */
>> +#define RK3399_PMUGRF_OS_REG2		0x308
>> +#define RK3399_PMUGRF_DDRTYPE_SHIFT	13
>> +#define RK3399_PMUGRF_DDRTYPE_MASK	7
>> +#define RK3399_PMUGRF_DDRTYPE_DDR3	3
>> +#define RK3399_PMUGRF_DDRTYPE_LPDDR2	5
>> +#define RK3399_PMUGRF_DDRTYPE_LPDDR3	6
>> +#define RK3399_PMUGRF_DDRTYPE_LPDDR4	7
>> +
>> +#endif
>>
> 
>