From: Brendan Higgins <brendanhiggins@google.com>
To: "Wolfram Sang" <wsa@the-dreams.de>,
"Rob Herring" <robh+dt@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Jason Cooper" <jason@lakedaemon.net>,
"Marc Zyngier" <marc.zyngier@arm.com>,
"Joel Stanley" <joel@jms.id.au>,
"Vladimir Zapolskiy" <vz@mleia.com>,
"Kachalov Anton" <mouse@mayc.ru>,
"Cédric Le Goater" <clg@kaod.org>,
"Benjamin Herrenschmidt" <benh@kernel.crashing.org>
Cc: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
OpenBMC Maillist <openbmc@lists.ozlabs.org>,
Brendan Higgins <brendanhiggins@google.com>,
Ryan Chen <ryan_chen@aspeedtech.com>
Subject: Re: [PATCH v7 4/5] i2c: aspeed: added driver for Aspeed I2C
Date: Mon, 8 May 2017 16:34:58 -0700 [thread overview]
Message-ID: <CAFd5g44RxehYCYB=WnxiXMZJe6E5_baQKDvdLAJX7+TTbvpi0Q@mail.gmail.com> (raw)
In-Reply-To: <20170424181818.2754-5-brendanhiggins@google.com>
Sorry for the spam everyone, email client did not do what I expected it to do.
I would like to release another version this week or next week, and I
think that we are pretty closed to having something we can apply, but
before I do that, I want to get something resolved:
> +static int __aspeed_i2c_init(struct aspeed_i2c_bus *bus,
> + struct platform_device *pdev)
> +{
> + int ret;
> +
> + /* Disable everything. */
> + writel(0, bus->base + ASPEED_I2C_FUN_CTRL_REG);
> +
> + ret = __aspeed_i2c_init_clk(bus, pdev);
> + if (ret < 0)
> + return ret;
> +
> + /* Enable Master Mode */
> + writel(readl(bus->base + ASPEED_I2C_FUN_CTRL_REG) |
> + ASPEED_I2CD_MASTER_EN |
> + /* TODO: provide device tree option for multi-master mode. */
I am curious what everyone thinks about this. It seemed that, earlier
on, people did not like me disabling multi-master mode, but I think
that it would make bus recovery not work as well. Given that, I think
it makes the most sense to provide a device tree option either to
enable multi-master support or disable it. Thoughts?
> + ASPEED_I2CD_MULTI_MASTER_DIS,
> + bus->base + ASPEED_I2C_FUN_CTRL_REG);
> +
> + /* Set interrupt generation of I2C controller */
> + writel(ASPEED_I2CD_INTR_ALL, bus->base + ASPEED_I2C_INTR_CTRL_REG);
> +
> + return 0;
> +}
next prev parent reply other threads:[~2017-05-08 23:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-24 18:18 [PATCH v7 0/5] i2c: aspeed: added driver for Aspeed I2C Brendan Higgins
2017-04-24 18:18 ` [PATCH v7 1/5] irqchip/aspeed-i2c-ic: binding docs for Aspeed I2C Interrupt Controller Brendan Higgins
2017-04-28 18:19 ` Rob Herring
2017-04-24 18:18 ` [PATCH v7 2/5] irqchip/aspeed-i2c-ic: Add I2C IRQ controller for Aspeed Brendan Higgins
2017-04-24 18:18 ` [PATCH v7 3/5] i2c: aspeed: added documentation for Aspeed I2C driver Brendan Higgins
2017-04-28 18:21 ` Rob Herring
2017-04-24 18:18 ` [PATCH v7 4/5] i2c: aspeed: added driver for Aspeed I2C Brendan Higgins
2017-04-25 2:21 ` Benjamin Herrenschmidt
2017-04-25 8:00 ` Brendan Higgins
2017-05-08 23:34 ` Brendan Higgins [this message]
[not found] ` <CAFd5g47VGa=wqeyg5tFjB5xD=YsTuP27hLN3-ZM62MJD8dCP_Q@mail.gmail.com>
2017-05-09 2:21 ` Wolfram Sang
2017-05-09 7:15 ` Benjamin Herrenschmidt
2017-05-12 7:02 ` Cédric Le Goater
2017-04-24 18:18 ` [PATCH v7 5/5] i2c: aspeed: added slave support for Aspeed I2C driver Brendan Higgins
2017-04-25 8:35 ` Brendan Higgins
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