From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com>,
andriy.shevchenko@linux.intel.com,
mika.westerberg@linux.intel.com
Cc: linux-i2c@vger.kernel.org
Subject: Re: [PATCH 2/2] i2c: designware: Calculate SCL timing parameter for High Speed Mode
Date: Wed, 8 Apr 2020 10:09:02 +0300 [thread overview]
Message-ID: <cf000dbc-c89c-2fb3-8564-0b4c899f3018@linux.intel.com> (raw)
In-Reply-To: <20200407133439.23422-3-wan.ahmad.zainie.wan.mohamad@intel.com>
On 4/7/20 4:34 PM, Wan Ahmad Zainie wrote:
> Custom parameters for HCNT/LCNT are not available for OF based system.
> Thus, we will use existing SCL timing parameter calculation functions
> for High Speed Mode too.
>
> The value for the parameters tSYMBOL and tLOW is taken from DesignWare
> DW_apb_i2c Databook v2.01a, section 3.15.4.6. The calculation should
> assume higher bus load since it gives slower timing parameter.
>
> Signed-off-by: Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> drivers/i2c/busses/i2c-designware-master.c | 18 +++++++++++++++---
> 1 file changed, 15 insertions(+), 3 deletions(-)
>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
next prev parent reply other threads:[~2020-04-08 7:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 13:34 [PATCH 0/2] i2c: designware: Calculate *CNT for Fast Mode Plus Wan Ahmad Zainie
2020-04-07 13:34 ` [PATCH 1/2] i2c: designware: Calculate SCL timing parameter " Wan Ahmad Zainie
2020-04-08 7:08 ` Jarkko Nikula
2020-04-15 11:14 ` Wolfram Sang
2020-04-07 13:34 ` [PATCH 2/2] i2c: designware: Calculate SCL timing parameter for High Speed Mode Wan Ahmad Zainie
2020-04-08 7:09 ` Jarkko Nikula [this message]
2020-04-15 11:14 ` Wolfram Sang
2020-04-07 14:56 ` [PATCH 0/2] i2c: designware: Calculate *CNT for Fast Mode Plus Andy Shevchenko
2020-04-15 11:15 ` Wolfram Sang
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