From: Stephen Boyd <sboyd@codeaurora.org>
To: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Cc: Michael Turquette <mturquette@baylibre.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
jeremy.kerr@canonical.com, linux-clk@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/3] Convert clk-fixed into module platform driver
Date: Wed, 15 Jun 2016 17:27:27 -0700 [thread overview]
Message-ID: <20160616002727.GP28218@codeaurora.org> (raw)
In-Reply-To: <CAPybu_1qTTn8tkdvJ8r1ehi4-ooJdPkmYJVvQdg71vsOJwoFUQ@mail.gmail.com>
On 06/15, Ricardo Ribalda Delgado wrote:
> Hi Stephen
>
> Assume this device tree overlay:
>
>
> &bus0{
>
> axi_clk: axi_clk {
> compatible = "fixed-clock";
> #clock-cells = <0x0>;
> clock-frequency = <125000000>;
> };
>
> iic_0: iic {
> #address-cells = <1>;
> #size-cells = <1>;
> compatible = "xlnx,xps-iic-2.00.a";
> reg = < 0x00030000 0x10000 >;
> interrupt-parent = <&xps_intc_0>;
> interrupts = < 2 2 >;
> clocks = <&axi_clk>;
> } ;
>
> }
>
> Which is basically a new i2c master and a fixed clock definition.
>
> The fixed clock driver will only be probed to the driver at arch
> initialization, when of_clk_init is called. The device overlay can be
> added at any point, usually after arch init. Which will result in ii_0
> failing to probe, because it is missing its clock.
>
> This changeset allows fixed clocks to be added after of_clk_init is
> called, by converting the driver into a platform driver.
>
Ok, so this is about supporting clks in overlays. I2C only comes
into the picture here because it's a consumer and happens to also
be on the same overlay.
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
prev parent reply other threads:[~2016-06-16 0:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-08 10:19 [PATCH 0/3] Convert clk-fixed into module platform driver Ricardo Ribalda Delgado
2016-06-08 10:19 ` [PATCH 1/3] clk: Add new function of_clk_is_provider() Ricardo Ribalda Delgado
2016-06-16 0:44 ` Stephen Boyd
2016-06-20 13:31 ` Ricardo Ribalda Delgado
2016-06-21 1:30 ` Stephen Boyd
2016-06-21 8:38 ` Ricardo Ribalda Delgado
2016-06-08 10:20 ` [PATCH 2/3] clk: fixed-factor: Convert into a module platform driver Ricardo Ribalda Delgado
2016-06-16 0:47 ` Stephen Boyd
2016-06-08 10:20 ` [PATCH 3/3] clk: fixed-rate: " Ricardo Ribalda Delgado
2016-06-14 17:39 ` [PATCH 0/3] Convert clk-fixed into " Stephen Boyd
2016-06-14 22:59 ` Ricardo Ribalda Delgado
2016-06-16 0:27 ` Stephen Boyd [this message]
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