lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 15 Oct 2015 01:35:19 +0000
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	Simon <horms@...ge.net.au>,
	Michael Turquette <mturquette@...libre.com>,
	Magnus <magnus.damm@...il.com>,
	Linux-SH <linux-sh@...r.kernel.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	<linux-clk@...r.kernel.org>
Subject: Re: [PATCH v4] clk: add CS2000 Fractional-N driver


Hi Stephen

> > Can I confirm ?
> > Does this "i2c device down" means call i2c_set_clientdata()
> > in this function ?
>
> I mean passing a struct device pointer to this function and then
> using it here in the clk_register() function.

I understand. will fix in v5

> > > > +static int cs2000_clk_init(struct cs2000_priv *priv)
> > > > +{
> > > > +	struct device *dev = priv_to_dev(priv);
> > > > +	struct device_node *np = dev->of_node;
> > > > +	u32 rate;
> > > > +	int ch = 0; /* it uses ch0 only at this point */
> > > > +	int ret;
> > > > +
> > > > +	if (of_property_read_u32(np, "clock-frequency", &rate))
> > >
> > > Why can't we do this with DT assigned rates?
> >
> > What doesn this "DT assigned rates" mean ?
> > this rate will be used as default output
>
> See the "Assigned clock parents and rates" section of
> Documentation/devicetree/bindings/clock/clock-bindings.txt and
> commit 86be408bfbd8 (clk: Support for clock parents and rates
> assigned from device tree, 2014-06-18).

I understand. If my understanding is correct, user driver
setups/enables this clock.
If so, I still want this "clock-frequency" feature.
because this clock requests other clock on my board.
And requested clock requests this clock too.
Thus, these clocks have dead lock on probe time

	cs2000: clk_multiplier@4f {
		...
		clocks = <&rcar_sound 0>, ...
		...
	};

	&rcar_sound {
		...
		assigned-clocks = <&cs2000>;
	        assigned-clock-rates = <24576000>;
		...
	};



Best regards
---
Kuninori Morimoto
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists