[PATCH] clk: Add functions to get optional clocks
From: linux@armlinux.org.uk (Russell King - ARM Linux)
Date: 2018-07-18 13:02:50
Also in:
linux-clk, lkml
On Wed, Jul 18, 2018 at 01:57:38PM +0100, Phil Edworthy wrote:
Behaves the same as (devm_)clk_get except where there is no clock producer. In this case, instead of returning -ENOENT, the function returns NULL. This makes error checking simpler and allows clk_prepare_enable, etc to be called on the returned reference without additional checks.
How does this work with non-DT systems, where looking a clock up which isn't yet registered with clkdev returns -ENOENT ? (clkdev doesn't know when all clocks are registered with it.) -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 13.8Mbps down 630kbps up According to speedtest.net: 13Mbps down 490kbps up