clk: improve handling of orphan clocks
From: Heiko Stuebner <heiko@...> Date: Sun, 12 Apr 2015 01:55:29 +0200
Using orphan clocks can introduce strange behaviour as they don't have rate information at all and also of course don't track This v2 takes into account suggestions from Stephen Boyd to not try to walk the clock tree at runtime but instead keep track of orphan states on clock tree changes and making it mandatory for everybody from the start as orphan clocks should not be used at all. This fixes an issue on most rk3288 platforms, where some soc-clocks are supplied by a 32khz clock from an external i2c-chip which often is only probed later in the boot process and maybe even after the drivers using these soc-clocks like the tsadc temperature sensor. In this case the driver using the clock should of course defer probing until the clock is actually usable. changes since v1: - track orphan status on clock tree changes instead of walking the tree on clk_get operations - make get-deferals mandatory for everybody Heiko Stuebner (2): clk: track the orphan status of clocks and their children clk: prevent orphan clocks from being used drivers/clk/clk.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 46 insertions(+), 3 deletions(-) -- 2.1.4
Patches in this set
- [0001] clk: track the orphan status of clocks and their children (raw)
- [0002] clk: prevent orphan clocks from being used (raw)
Statistics
- 2 individual patches
- 46 lines added
- 3 lines removed