diff options
| author | Tony Lindgren <tony@atomide.com> | 2021-06-16 15:31:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-23 15:41:31 +0300 |
| commit | 5babc39775651a15fdb701b23f8c2b2cec6cc168 (patch) | |
| tree | a1802d6f967aa9b4e8e21a3e3d46429374b23763 /drivers/clk | |
| parent | aad8f1d88ed6a60b8fd1d5298a8bfe10002d3610 (diff) | |
| download | linux-5babc39775651a15fdb701b23f8c2b2cec6cc168.tar.xz | |
clocksource/drivers/timer-ti-dm: Handle dra7 timer wrap errata i940
commit 25de4ce5ed02994aea8bc111d133308f6fd62566 upstream.
There is a timer wrap issue on dra7 for the ARM architected timer.
In a typical clock configuration the timer fails to wrap after 388 days.
To work around the issue, we need to use timer-ti-dm percpu timers instead.
Let's configure dmtimer3 and 4 as percpu timers by default, and warn about
the issue if the dtb is not configured properly.
For more information, please see the errata for "AM572x Sitara Processors
Silicon Revisions 1.1, 2.0":
https://www.ti.com/lit/er/sprz429m/sprz429m.pdf
The concept is based on earlier reference patches done by Tero Kristo and
Keerthy.
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Tero Kristo <kristo@kernel.org>
[tony@atomide.com: backported to 5.4.y]
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/ti/clk-7xx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/clk/ti/clk-7xx.c b/drivers/clk/ti/clk-7xx.c index 66e4b2b9ec60..04ed6614ee31 100644 --- a/drivers/clk/ti/clk-7xx.c +++ b/drivers/clk/ti/clk-7xx.c @@ -793,6 +793,7 @@ static struct ti_dt_clk dra7xx_clks[] = { DT_CLK(NULL, "timer_32k_ck", "sys_32k_ck"), DT_CLK(NULL, "sys_clkin_ck", "timer_sys_clk_div"), DT_CLK(NULL, "sys_clkin", "sys_clkin1"), + DT_CLK(NULL, "timer_sys_ck", "timer_sys_clk_div"), DT_CLK(NULL, "atl_dpll_clk_mux", "atl-clkctrl:0000:24"), DT_CLK(NULL, "atl_gfclk_mux", "atl-clkctrl:0000:26"), DT_CLK(NULL, "dcan1_sys_clk_mux", "wkupaon-clkctrl:0068:24"), |