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clk: qcom: Add support for BRANCH_HALT_SKIP flag for branch clocks

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There could be few clocks where the clock status bit is not
required to be polled as the clock on/off would be controlled
by enabling/disabling external source. Add support for the
same by introducing new flag named as 'BRANCH_HALT_SKIP'.

Signed-off-by: Amit Nischal <anischal@codeaurora.org>
[sboyd@kernel.org: Rename flag to BRANCH_HALT_SKIP]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Amit Nischal 2018-04-30 21:50:09 +05:30 committed by Stephen Boyd
parent 88051f55de
commit 7d99ced8f4
2 changed files with 6 additions and 2 deletions
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7
drivers/clk/qcom/clk-branch.c
View File

@ -77,8 +77,11 @@ static int clk_branch_wait(const struct clk_branch *br, bool enabling,
bool voted = br->halt_check & BRANCH_VOTED;
const char *name = clk_hw_get_name(&br->clkr.hw);
/* Skip checking halt bit if the clock is in hardware gated mode */
if (clk_branch_in_hwcg_mode(br))
/*
* Skip checking halt bit if we're explicitly ignoring the bit or the
* clock is in hardware gated mode
*/
if (br->halt_check == BRANCH_HALT_SKIP || clk_branch_in_hwcg_mode(br))
return 0;
if (br->halt_check == BRANCH_HALT_DELAY || (!enabling && voted)) {

1
drivers/clk/qcom/clk-branch.h
View File

@ -42,6 +42,7 @@ struct clk_branch {
#define BRANCH_HALT_ENABLE 1 /* pol: 0 = halt */
#define BRANCH_HALT_ENABLE_VOTED (BRANCH_HALT_ENABLE | BRANCH_VOTED)
#define BRANCH_HALT_DELAY 2 /* No bit to check; just delay */
#define BRANCH_HALT_SKIP 3 /* Don't check halt bit */
struct clk_regmap clkr;
};