linux-kernel - Re: [PATCH v6 6/7] clk: baikal-t1: Add DDR/PCIe directly controlled resets support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220711132348.GB3771@pengutronix.de>
Date:   Mon, 11 Jul 2022 15:23:48 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-clk@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v6 6/7] clk: baikal-t1: Add DDR/PCIe directly controlled
 resets support

On Fri, Jul 08, 2022 at 10:27:24PM +0300, Serge Semin wrote:
> Aside with a set of the trigger-like resets Baikal-T1 CCU provides two
> additional blocks with directly controlled reset signals. In particular it
> concerns DDR full and initial resets and various PCIe sub-domains resets.
> Let's add the direct reset assertion/de-assertion of the corresponding
> flags support into the Baikal-T1 CCU driver then. It will be required at
> least for the PCIe platform driver. Obviously the DDR controller isn't
> supposed to be fully reset in the kernel, so the corresponding controls
> are added just for the sake of the interface implementation completeness.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> 
> ---
> 
> Changelog v6:
> - Refactor the code to support the linear reset IDs only. (@Philipp)
> ---
>  drivers/clk/baikal-t1/ccu-rst.c     | 67 +++++++++++++++++++++++++++++
>  drivers/clk/baikal-t1/ccu-rst.h     | 10 +++++
>  include/dt-bindings/reset/bt1-ccu.h |  9 ++++
>  3 files changed, 86 insertions(+)
> 
> diff --git a/drivers/clk/baikal-t1/ccu-rst.c b/drivers/clk/baikal-t1/ccu-rst.c
> index 8fd40810d24e..c20aa3e07afb 100644
> --- a/drivers/clk/baikal-t1/ccu-rst.c
> +++ b/drivers/clk/baikal-t1/ccu-rst.c
> @@ -35,18 +35,29 @@
>  #define CCU_AXI_HWA_BASE		0x054
>  #define CCU_AXI_SRAM_BASE		0x058
>  
> +#define CCU_SYS_DDR_BASE		0x02c
>  #define CCU_SYS_SATA_REF_BASE		0x060
>  #define CCU_SYS_APB_BASE		0x064
> +#define CCU_SYS_PCIE_BASE		0x144
>  
>  #define CCU_RST_DELAY_US		1
>  
>  #define CCU_RST_TRIG(_base, _ofs)		\
>  	{					\
> +		.type = CCU_RST_TRIG,		\
> +		.base = _base,			\
> +		.mask = BIT(_ofs),		\
> +	}
> +
> +#define CCU_RST_DIR(_base, _ofs)		\
> +	{					\
> +		.type = CCU_RST_DIR,		\
>  		.base = _base,			\
>  		.mask = BIT(_ofs),		\
>  	}
>  
>  struct ccu_rst_info {
> +	enum ccu_rst_type type;
>  	unsigned int base;
>  	unsigned int mask;
>  };
> @@ -77,8 +88,18 @@ static const struct ccu_rst_info axi_rst_info[] = {
>   * well while the Linux kernel is working.
>   */
>  static const struct ccu_rst_info sys_rst_info[] = {
> +

Please drop this empty line. Otherwise,

Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de>

regards
Philipp