From: Wolfram Sang <wsa@the-dreams.de>
To: Alain Volmat <alain.volmat@st.com>
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
alexandre.torgue@st.com, linux-kernel@vger.kernel.org,
pierre-yves.mordret@st.com, robh+dt@kernel.org,
linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com,
fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 2/2] i2c: i2c-stm32f7: allows for any bus frequency
Date: Wed, 15 Apr 2020 13:09:16 +0200 [thread overview]
Message-ID: <20200415110916.GO1141@ninjato> (raw)
In-Reply-To: <1585226661-26262-3-git-send-email-alain.volmat@st.com>
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Hi Alain,
On Thu, Mar 26, 2020 at 01:44:21PM +0100, Alain Volmat wrote:
> Do not limitate to the 3 (100KHz, 400KHz, 1MHz) bus frequency but
> instead allows any frequency (if it matches timing requirements).
> Depending on the requested frequency, use the spec data from either
> Standard, Fast or Fast Plus mode.
>
> Hardcoding of min/max bus frequencies is removed and is instead computed.
>
> The driver do not use anymore speed identifier but instead handle
> directly the frequency and figure out the spec data (necessary
> for the computation of the timing register) based on the frequency.
Useful improvement!
> +static struct stm32f7_i2c_spec *get_specs(u32 rate)
This is quite a generic namespace. Can we prefix stm32f7_<sth> here?
> + if (rate <= i2c_specs[i].rate)
> + return &i2c_specs[i];
Same for i2c_specs here?
> +static u32 get_lower_rate(u32 rate)
Here, too.
Rest looks good to me.
Regards,
Wolfram
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next prev parent reply other threads:[~2020-04-15 11:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 12:44 [PATCH v2 0/2] i2c: i2c-stm32f7: allow range of I2C bus frequency Alain Volmat
2020-03-26 12:44 ` [PATCH v2 1/2] dt-bindings: i2c: i2c-stm32f7: allow clock-frequency range Alain Volmat
2020-04-04 17:18 ` Rob Herring
2020-03-26 12:44 ` [PATCH v2 2/2] i2c: i2c-stm32f7: allows for any bus frequency Alain Volmat
2020-03-30 8:48 ` Pierre Yves MORDRET
2020-04-15 11:09 ` Wolfram Sang [this message]
2020-04-20 15:00 ` Alain Volmat
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