Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
IronPort-SDR: 8QlVzJmy3OinDRgfR/cmPLHanxkLLnY+OXwrDSxuMkJ1IpB2o6EB6pAMvkpF1jhoZUokh6zN8D
 zAbDlAxpGjLg==
IronPort-SDR: 8jl0lvYsbmsqMEXaBWfMO2XgkrGQ8/WLqMPFlBqryMdC5PajiPwPT+KZkGPKKKYrHOimzKU4qQ
 hWR3x6t5sxyQ==
Date:   Tue, 31 Mar 2020 15:04:20 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To:     amirmizi6@gmail.com
Cc:     Eyal.Cohen@nuvoton.com, oshrialkoby85@gmail.com,
        alexander.steffen@infineon.com, robh+dt@kernel.org,
        mark.rutland@arm.com, peterhuewe@gmx.de, jgg@ziepe.ca,
        arnd@arndb.de, gregkh@linuxfoundation.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-integrity@vger.kernel.org, oshri.alkoby@nuvoton.com,
        tmaimon77@gmail.com, gcwilson@us.ibm.com, kgoldman@us.ibm.com,
        Dan.Morav@nuvoton.com, oren.tanami@nuvoton.com,
        shmulik.hager@nuvoton.com, amir.mizinski@nuvoton.com
Subject: Re: [PATCH v4 1/7] tpm: tpm_tis: Make implementation of read16
 read32 write32 optional
Message-ID: <20200331120405.GF8295@linux.intel.com>
References: <20200331113207.107080-1-amirmizi6@gmail.com>
 <20200331113207.107080-2-amirmizi6@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20200331113207.107080-2-amirmizi6@gmail.com>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Tue, Mar 31, 2020 at 02:32:01PM +0300, amirmizi6@gmail.com wrote:
> From: Amir Mizinski <amirmizi6@gmail.com>
> 
> Only tpm_tis can use memory mapped I/O, which is truly mapped into
> the kernel's memory space. So using ioread16/ioread32/iowrite32 turn into a
> straightforward pointer dereference.
> Every other driver require more complicated operations to read more than 1
> byte at a time and will just fall back to read_bytes/write_bytes.
> Therefore, move this common code out of tpm_tis_spi into tpm_tis_core, so
> that it is automatically used when low-level drivers do not implement the
> specialized methods.
> 
> Co-developed-by: Alexander Steffen <Alexander.Steffen@infineon.com>
> Signed-off-by: Alexander Steffen <Alexander.Steffen@infineon.com>
> Signed-off-by: Amir Mizinski <amirmizi6@gmail.com>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

/Jarkko