| Message ID | 20220422183012.444674-3-j.neuschaefer@gmx.net (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Nuvoton WPCM450 clock and reset driver | expand |
On Fri, Apr 22, 2022 at 11:30:07AM PDT, Jonathan Neuschäfer wrote: >In the WPCM450 SoC, the clocks for each timer can be gated individually. >To prevent the timer 1 clock from being gated, enable it explicitly. > >Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> >--- > drivers/clocksource/timer-npcm7xx.c | 14 +++++++++++++- > 1 file changed, 13 insertions(+), 1 deletion(-) > >diff --git a/drivers/clocksource/timer-npcm7xx.c b/drivers/clocksource/timer-npcm7xx.c >index a00520cbb660a..974269b6b0c36 100644 >--- a/drivers/clocksource/timer-npcm7xx.c >+++ b/drivers/clocksource/timer-npcm7xx.c >@@ -188,17 +188,29 @@ static void __init npcm7xx_clocksource_init(void) > > static int __init npcm7xx_timer_init(struct device_node *np) > { >+ struct clk *clk; > int ret; > > ret = timer_of_init(np, &npcm7xx_to); >- if (ret) >+ if (ret) { >+ pr_warn("timer_of_init failed: %d\n", ret); This seems like a somewhat opaque message to emit, especially given this file's lack of a pr_fmt() definition -- maybe add a %pOF so it's slightly easier to trace back to the device it stems from? > return ret; >+ } > > /* Clock input is divided by PRESCALE + 1 before it is fed */ > /* to the counter */ > npcm7xx_to.of_clk.rate = npcm7xx_to.of_clk.rate / > (NPCM7XX_Tx_MIN_PRESCALE + 1); > >+ /* Enable the clock for timer1, if it exists */ >+ clk = of_clk_get(np, 1); >+ if (clk) { >+ if (!IS_ERR(clk)) >+ clk_prepare_enable(clk); >+ else >+ pr_warn("Failed to get clock for timer1: %pe", clk); Likewise here (though to a slightly lesser extent). >+ } >+ > npcm7xx_clocksource_init(); > npcm7xx_clockevents_init(); > >-- >2.35.1 >
On Thu, Apr 28, 2022 at 09:11:58AM +0000, Zev Weiss wrote: > On Fri, Apr 22, 2022 at 11:30:07AM PDT, Jonathan Neuschäfer wrote: > >In the WPCM450 SoC, the clocks for each timer can be gated individually. > >To prevent the timer 1 clock from being gated, enable it explicitly. > > > >Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> > >--- > > drivers/clocksource/timer-npcm7xx.c | 14 +++++++++++++- > > 1 file changed, 13 insertions(+), 1 deletion(-) > > > >diff --git a/drivers/clocksource/timer-npcm7xx.c b/drivers/clocksource/timer-npcm7xx.c > >index a00520cbb660a..974269b6b0c36 100644 > >--- a/drivers/clocksource/timer-npcm7xx.c > >+++ b/drivers/clocksource/timer-npcm7xx.c > >@@ -188,17 +188,29 @@ static void __init npcm7xx_clocksource_init(void) > > > > static int __init npcm7xx_timer_init(struct device_node *np) > > { > >+ struct clk *clk; > > int ret; > > > > ret = timer_of_init(np, &npcm7xx_to); > >- if (ret) > >+ if (ret) { > >+ pr_warn("timer_of_init failed: %d\n", ret); > > This seems like a somewhat opaque message to emit, especially given this > file's lack of a pr_fmt() definition -- maybe add a %pOF so it's > slightly easier to trace back to the device it stems from? Now that I look at this code again, I think I should just drop the pr_warn entirely, since I didn't mention it in the description, and it's unrelated to enabling the clock. > > return ret; > >+ } > > > > /* Clock input is divided by PRESCALE + 1 before it is fed */ > > /* to the counter */ > > npcm7xx_to.of_clk.rate = npcm7xx_to.of_clk.rate / > > (NPCM7XX_Tx_MIN_PRESCALE + 1); > > > >+ /* Enable the clock for timer1, if it exists */ > >+ clk = of_clk_get(np, 1); > >+ if (clk) { > >+ if (!IS_ERR(clk)) > >+ clk_prepare_enable(clk); > >+ else > >+ pr_warn("Failed to get clock for timer1: %pe", clk); > > Likewise here (though to a slightly lesser extent). I'll add %pOF here. Thanks, Jonathan
diff --git a/drivers/clocksource/timer-npcm7xx.c b/drivers/clocksource/timer-npcm7xx.c index a00520cbb660a..974269b6b0c36 100644 --- a/drivers/clocksource/timer-npcm7xx.c +++ b/drivers/clocksource/timer-npcm7xx.c @@ -188,17 +188,29 @@ static void __init npcm7xx_clocksource_init(void) static int __init npcm7xx_timer_init(struct device_node *np) { + struct clk *clk; int ret; ret = timer_of_init(np, &npcm7xx_to); - if (ret) + if (ret) { + pr_warn("timer_of_init failed: %d\n", ret); return ret; + } /* Clock input is divided by PRESCALE + 1 before it is fed */ /* to the counter */ npcm7xx_to.of_clk.rate = npcm7xx_to.of_clk.rate / (NPCM7XX_Tx_MIN_PRESCALE + 1); + /* Enable the clock for timer1, if it exists */ + clk = of_clk_get(np, 1); + if (clk) { + if (!IS_ERR(clk)) + clk_prepare_enable(clk); + else + pr_warn("Failed to get clock for timer1: %pe", clk); + } + npcm7xx_clocksource_init(); npcm7xx_clockevents_init();
In the WPCM450 SoC, the clocks for each timer can be gated individually. To prevent the timer 1 clock from being gated, enable it explicitly. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> --- drivers/clocksource/timer-npcm7xx.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) -- 2.35.1