On 08/04/2016 10:57 PM, Stephen Boyd wrote: > On 07/19, Masahiro Yamada wrote: >> > The .get(_hw) callback of an OF clock provider can return a NULL >> > pointer in some cases. >> > >> > For example, of_clk_src_onecell_get() returns NULL for index 1 of a >> > sparse array of clocks like follows: >> > >> > clk_num == 3 >> > idx 0: UART clk >> > idx 1: NULL (no clk is allocated) >> > idx 2: I2C clk >> > >> > In such cases, clk_get() successfully returns NULL.
I remember running into same issue before, we have addressed it by initializing the array of clocks with some errno value, e.g ERR_PTR(-ENOENT), so there is no chance to get NULL from the array - either a valid clk pointer or an ERR_PTR() value. -- Thanks, Sylwester
