From: Wolfram Sang <wsa@the-dreams.de>
To: Max <max@enpas.org>
Cc: linux-i2c@vger.kernel.org, linux-hwmon@vger.kernel.org,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Jean Delvare <jdelvare@suse.com>,
Guenter Roeck <linux@roeck-us.net>,
linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org,
glaubitz@physik.fu-berlin.de
Subject: Re: [PATCH v2 1/4] i2c/busses: Add i2c-icy for I2C on m68k/Amiga
Date: Thu, 15 Aug 2019 14:04:30 +0200 [thread overview]
Message-ID: <20190815120430.GB1916@kunai> (raw)
In-Reply-To: <54185c85-8c26-916e-41b1-af9b55223e7b@enpas.org>
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> My suggestion is to not touch i2c-elektor at all for now, and remove
> the 'clock' parameter from the first iteration of i2c-icy. It can be
> added back in case someone complains, which I deem unlikely.
Full ack.
> When the PCF8584 is addressed as slave, this register
> must be loaded with the 7-bit I 2 C-bus address to which the
> PCF8584 is to respond. During initialization, the own
> address register S0' must be written to, regardless
> whether it is later used.
I see. It must be written a non-zero value to leave the monitor mode.
But this really needs no callback, we can hardcode any non-zero value.
If slave support is (ever) to be implemented, the own address will come
from the I2C core.
> Okay, so we don't care. Cool, then it's safe to kick the 'clock'
> parameter from i2c-icy. All 2019 boards (which should be the vast
> majority in existence) came with a 12 MHz oscillator AFAIK, so the
> default should be good.
Most drivers don't allow users to change the bus speed, so I think it is
safe to remove.
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next prev parent reply other threads:[~2019-08-15 12:04 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-12 23:52 [PATCH v2 1/4] i2c/busses: Add i2c-icy for I2C on m68k/Amiga Max Staudt
2019-08-12 23:52 ` [PATCH v2 2/4] i2c/busses/i2c-icy: Add LTC2990 present on 2019 board revision Max Staudt
2019-08-13 7:03 ` Geert Uytterhoeven
2019-08-13 9:49 ` Max Staudt
2019-08-14 19:52 ` Wolfram Sang
2019-08-12 23:52 ` [PATCH v2 3/4] hwmon/ltc2990: Add platform_data support Max Staudt
2019-08-13 6:59 ` Geert Uytterhoeven
2019-08-13 8:02 ` Guenter Roeck
2019-08-13 8:27 ` Geert Uytterhoeven
2019-08-13 13:27 ` Guenter Roeck
2019-08-13 13:32 ` Geert Uytterhoeven
2019-08-13 10:10 ` Max Staudt
2019-08-13 13:24 ` Guenter Roeck
2019-08-13 13:31 ` Max
2019-08-14 18:11 ` Max Staudt
2019-08-12 23:52 ` [PATCH v2 4/4] i2c/busses/i2c-icy: Add platform_data for LTC2990 Max Staudt
2019-08-13 7:04 ` Geert Uytterhoeven
2019-08-13 7:08 ` [PATCH v2 1/4] i2c/busses: Add i2c-icy for I2C on m68k/Amiga Geert Uytterhoeven
2019-08-13 9:50 ` Max Staudt
2019-08-14 19:47 ` Wolfram Sang
2019-08-14 22:33 ` Max Staudt
2019-08-15 7:12 ` Wolfram Sang
2019-08-15 10:00 ` Max Staudt
2019-08-15 11:48 ` Wolfram Sang
2019-08-15 11:52 ` Max
2019-08-15 12:04 ` Wolfram Sang [this message]
2019-08-15 12:10 ` Max Staudt
2019-08-15 12:52 ` Wolfram Sang
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