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| author | Sudeep Holla <sudeep.holla@arm.com> | 2020-07-09 10:17:04 +0200 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2020-07-10 13:06:27 +0200 |
| commit | dccec73de91de04f2a62c877411ecbe368a775f7 (patch) | |
| tree | c15c104363f66bd32173f03c3c4b28611dac47d0 /drivers/firmware | |
| parent | firmware: arm_scmi: Add base notifications support (diff) | |
| download | linux-dccec73de91de04f2a62c877411ecbe368a775f7.tar.xz linux-dccec73de91de04f2a62c877411ecbe368a775f7.zip | |
firmware: arm_scmi: Keep the discrete clock rates sorted
Instead of relying on the firmware to keep the clock rates sorted, let
us sort the list. This is not essential for clock layer but it helps
to find the min and max rates easily from the list.
Link: https://lore.kernel.org/r/20200709081705.46084-1-sudeep.holla@arm.com
Fixes: 5f6c6430e904 ("firmware: arm_scmi: add initial support for clock protocol")
Reported-and-tested-by: Dien Pham <dien.pham.ry@renesas.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scmi/clock.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 4c2227662b26..6593ce87f420 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -5,6 +5,8 @@ * Copyright (C) 2018 ARM Ltd. */ +#include <linux/sort.h> + #include "common.h" enum scmi_clock_protocol_cmd { @@ -121,11 +123,23 @@ static int scmi_clock_attributes_get(const struct scmi_handle *handle, return ret; } +static int rate_cmp_func(const void *_r1, const void *_r2) +{ + const u64 *r1 = _r1, *r2 = _r2; + + if (*r1 < *r2) + return -1; + else if (*r1 == *r2) + return 0; + else + return 1; +} + static int scmi_clock_describe_rates_get(const struct scmi_handle *handle, u32 clk_id, struct scmi_clock_info *clk) { - u64 *rate; + u64 *rate = 0; int ret, cnt; bool rate_discrete = false; u32 tot_rate_cnt = 0, rates_flag; @@ -184,8 +198,10 @@ scmi_clock_describe_rates_get(const struct scmi_handle *handle, u32 clk_id, */ } while (num_returned && num_remaining); - if (rate_discrete) + if (rate_discrete && rate) { clk->list.num_rates = tot_rate_cnt; + sort(rate, tot_rate_cnt, sizeof(*rate), rate_cmp_func, NULL); + } clk->rate_discrete = rate_discrete; |