Re: [PATCH 05/13] m68k: coldfire: use legacy_timer_tick()

Greg Ungerer
2020-10-09T12:53:30Z

Hi Arnd,

On 9/10/20 1:46 am, Arnd Bergmann wrote:
> Replace the indirect function calls in the timer code
> with direct calls to the newly added legacy_timer_tick()
> helper for those that have not yet been converted to
> generic clockevents.
>
> This makes the timer code a little more self-contained.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

I tested this series on a couple of different ColdFire parts
(5208 and 5475) and under QEMU emulating the 5208. All checked
out good, all worked as expected. So for the ColdFire changes:

Tested-by: Greg Ungerer <gerg@linux-m68k.org>

Regards
Greg

> ---
> arch/m68k/Kconfig.cpu | 35 +++++++++++++++++++++++++++++------
> arch/m68k/coldfire/Makefile | 32 ++++++++++++++++++--------------
> arch/m68k/coldfire/sltimers.c | 6 ++----
> arch/m68k/coldfire/timers.c | 6 ++----
> 4 files changed, 51 insertions(+), 28 deletions(-)
>
> diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu
> index 694c4fca9f5d..322a35ef14c6 100644
> --- a/arch/m68k/Kconfig.cpu
> +++ b/arch/m68k/Kconfig.cpu
> @@ -137,6 +137,7 @@ config M5206
> bool "MCF5206"
> depends on !MMU
> select COLDFIRE_SW_A7
> + select COLDFIRE_TIMERS
> select HAVE_MBAR
> select CPU_NO_EFFICIENT_FFS
> help
> @@ -146,6 +147,7 @@ config M5206e
> bool "MCF5206e"
> depends on !MMU
> select COLDFIRE_SW_A7
> + select COLDFIRE_TIMERS
> select HAVE_MBAR
> select CPU_NO_EFFICIENT_FFS
> help
> @@ -154,7 +156,7 @@ config M5206e
> config M520x
> bool "MCF520x"
> depends on !MMU
> - select GENERIC_CLOCKEVENTS
> + select COLDFIRE_PIT_TIMER
> select HAVE_CACHE_SPLIT
> help
> Freescale Coldfire 5207/5208 processor support.
> @@ -162,7 +164,7 @@ config M520x
> config M523x
> bool "MCF523x"
> depends on !MMU
> - select GENERIC_CLOCKEVENTS
> + select COLDFIRE_PIT_TIMER
> select HAVE_CACHE_SPLIT
> select HAVE_IPSBAR
> help
> @@ -172,6 +174,7 @@ config M5249
> bool "MCF5249"
> depends on !MMU
> select COLDFIRE_SW_A7
> + select COLDFIRE_TIMERS
> select HAVE_MBAR
> select CPU_NO_EFFICIENT_FFS
> help
> @@ -181,6 +184,7 @@ config M525x
> bool "MCF525x"
> depends on !MMU
> select COLDFIRE_SW_A7
> + select COLDFIRE_TIMERS
> select HAVE_MBAR
> select CPU_NO_EFFICIENT_FFS
> help
> @@ -189,10 +193,10 @@ config M525x
> config M5271
> bool "MCF5271"
> depends on !MMU
> + select COLDFIRE_PIT_TIMER
> select M527x
> select HAVE_CACHE_SPLIT
> select HAVE_IPSBAR
> - select GENERIC_CLOCKEVENTS
> help
> Freescale (Motorola) ColdFire 5270/5271 processor support.
>
> @@ -200,6 +204,7 @@ config M5272
> bool "MCF5272"
> depends on !MMU
> select COLDFIRE_SW_A7
> + select COLDFIRE_TIMERS
> select HAVE_MBAR
> select CPU_NO_EFFICIENT_FFS
> help
> @@ -208,17 +213,17 @@ config M5272
> config M5275
> bool "MCF5275"
> depends on !MMU
> + select COLDFIRE_PIT_TIMER
> select M527x
> select HAVE_CACHE_SPLIT
> select HAVE_IPSBAR
> - select GENERIC_CLOCKEVENTS
> help
> Freescale (Motorola) ColdFire 5274/5275 processor support.
>
> config M528x
> bool "MCF528x"
> depends on !MMU
> - select GENERIC_CLOCKEVENTS
> + select COLDFIRE_PIT_TIMER
> select HAVE_CACHE_SPLIT
> select HAVE_IPSBAR
> help
> @@ -227,6 +232,7 @@ config M528x
> config M5307
> bool "MCF5307"
> depends on !MMU
> + select COLDFIRE_TIMERS
> select COLDFIRE_SW_A7
> select HAVE_CACHE_CB
> select HAVE_MBAR
> @@ -237,6 +243,7 @@ config M5307
> config M532x
> bool "MCF532x"
> depends on !MMU
> + select COLDFIRE_TIMERS
> select M53xx
> select HAVE_CACHE_CB
> help
> @@ -245,6 +252,7 @@ config M532x
> config M537x
> bool "MCF537x"
> depends on !MMU
> + select COLDFIRE_TIMERS
> select M53xx
> select HAVE_CACHE_CB
> help
> @@ -254,6 +262,7 @@ config M5407
> bool "MCF5407"
> depends on !MMU
> select COLDFIRE_SW_A7
> + select COLDFIRE_TIMERS
> select HAVE_CACHE_CB
> select HAVE_MBAR
> select CPU_NO_EFFICIENT_FFS
> @@ -263,6 +272,7 @@ config M5407
> config M547x
> bool "MCF547x"
> select M54xx
> + select COLDFIRE_SLTIMERS
> select MMU_COLDFIRE if MMU
> select FPU if MMU
> select HAVE_CACHE_CB
> @@ -273,6 +283,7 @@ config M547x
>
> config M548x
> bool "MCF548x"
> + select COLDFIRE_SLTIMERS
> select MMU_COLDFIRE if MMU
> select FPU if MMU
> select M54xx
> @@ -284,8 +295,8 @@ config M548x
>
> config M5441x
> bool "MCF5441x"
> + select COLDFIRE_PIT_TIMER
> select MMU_COLDFIRE if MMU
> - select GENERIC_CLOCKEVENTS
> select HAVE_CACHE_CB
> help
> Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
> @@ -302,6 +313,18 @@ config M54xx
> select HAVE_PCI
> bool
>
> +config COLDFIRE_PIT_TIMER
> + bool
> + select GENERIC_CLOCKEVENTS
> +
> +config COLDFIRE_TIMERS
> + bool
> + select LEGACY_TIMER_TICK
> +
> +config COLDFIRE_SLTIMERS
> + bool
> + select LEGACY_TIMER_TICK
> +
> endif # COLDFIRE
>
>
> diff --git a/arch/m68k/coldfire/Makefile b/arch/m68k/coldfire/Makefile
> index 573eabca1a3a..a3e18d73d8b8 100644
> --- a/arch/m68k/coldfire/Makefile
> +++ b/arch/m68k/coldfire/Makefile
> @@ -16,20 +16,24 @@
> asflags-$(CONFIG_FULLDEBUG) := -DDEBUGGER_COMPATIBLE_CACHE=1
>
> obj-$(CONFIG_COLDFIRE) += cache.o clk.o device.o dma.o entry.o vectors.o
> -obj-$(CONFIG_M5206) += m5206.o timers.o intc.o reset.o
> -obj-$(CONFIG_M5206e) += m5206.o timers.o intc.o reset.o
> -obj-$(CONFIG_M520x) += m520x.o pit.o intc-simr.o reset.o
> -obj-$(CONFIG_M523x) += m523x.o pit.o dma_timer.o intc-2.o reset.o
> -obj-$(CONFIG_M5249) += m5249.o timers.o intc.o intc-5249.o reset.o
> -obj-$(CONFIG_M525x) += m525x.o timers.o intc.o intc-525x.o reset.o
> -obj-$(CONFIG_M527x) += m527x.o pit.o intc-2.o reset.o
> -obj-$(CONFIG_M5272) += m5272.o intc-5272.o timers.o
> -obj-$(CONFIG_M528x) += m528x.o pit.o intc-2.o reset.o
> -obj-$(CONFIG_M5307) += m5307.o timers.o intc.o reset.o
> -obj-$(CONFIG_M53xx) += m53xx.o timers.o intc-simr.o reset.o
> -obj-$(CONFIG_M5407) += m5407.o timers.o intc.o reset.o
> -obj-$(CONFIG_M54xx) += m54xx.o sltimers.o intc-2.o
> -obj-$(CONFIG_M5441x) += m5441x.o pit.o intc-simr.o reset.o
> +obj-$(CONFIG_M5206) += m5206.o intc.o reset.o
> +obj-$(CONFIG_M5206e) += m5206.o intc.o reset.o
> +obj-$(CONFIG_M520x) += m520x.o intc-simr.o reset.o
> +obj-$(CONFIG_M523x) += m523x.o dma_timer.o intc-2.o reset.o
> +obj-$(CONFIG_M5249) += m5249.o intc.o intc-5249.o reset.o
> +obj-$(CONFIG_M525x) += m525x.o intc.o intc-525x.o reset.o
> +obj-$(CONFIG_M527x) += m527x.o intc-2.o reset.o
> +obj-$(CONFIG_M5272) += m5272.o intc-5272.o
> +obj-$(CONFIG_M528x) += m528x.o intc-2.o reset.o
> +obj-$(CONFIG_M5307) += m5307.o intc.o reset.o
> +obj-$(CONFIG_M53xx) += m53xx.o intc-simr.o reset.o
> +obj-$(CONFIG_M5407) += m5407.o intc.o reset.o
> +obj-$(CONFIG_M54xx) += m54xx.o intc-2.o
> +obj-$(CONFIG_M5441x) += m5441x.o intc-simr.o reset.o
> +
> +obj-$(CONFIG_COLDFIRE_PIT_TIMER) += pit.o
> +obj-$(CONFIG_COLDFIRE_TIMERS) += timers.o
> +obj-$(CONFIG_COLDFIRE_SLTIMERS) += sltimers.o
>
> obj-$(CONFIG_NETtel) += nettel.o
> obj-$(CONFIG_CLEOPATRA) += nettel.o
> diff --git a/arch/m68k/coldfire/sltimers.c b/arch/m68k/coldfire/sltimers.c
> index 5ab81c9c552d..25a1319f3cb8 100644
> --- a/arch/m68k/coldfire/sltimers.c
> +++ b/arch/m68k/coldfire/sltimers.c
> @@ -83,14 +83,13 @@ void mcfslt_profile_init(void)
> static u32 mcfslt_cycles_per_jiffy;
> static u32 mcfslt_cnt;
>
> -static irq_handler_t timer_interrupt;
> -
> static irqreturn_t mcfslt_tick(int irq, void *dummy)
> {
> /* Reset Slice Timer 0 */
> __raw_writel(MCFSLT_SSR_BE | MCFSLT_SSR_TE, TA(MCFSLT_SSR));
> mcfslt_cnt += mcfslt_cycles_per_jiffy;
> - return timer_interrupt(irq, dummy);
> + legacy_timer_tick(1);
> + return IRQ_HANDLED;
> }
>
> static u64 mcfslt_read_clk(struct clocksource *cs)
> @@ -136,7 +135,6 @@ void hw_timer_init(irq_handler_t handler)
> /* initialize mcfslt_cnt knowing that slice timers count down */
> mcfslt_cnt = mcfslt_cycles_per_jiffy;
>
> - timer_interrupt = handler;
> r = request_irq(MCF_IRQ_TIMER, mcfslt_tick, IRQF_TIMER, "timer", NULL);
> if (r) {
> pr_err("Failed to request irq %d (timer): %pe\n", MCF_IRQ_TIMER,
> diff --git a/arch/m68k/coldfire/timers.c b/arch/m68k/coldfire/timers.c
> index b8301fddf901..24b5e2d1b00b 100644
> --- a/arch/m68k/coldfire/timers.c
> +++ b/arch/m68k/coldfire/timers.c
> @@ -48,8 +48,6 @@ void coldfire_profile_init(void);
> static u32 mcftmr_cycles_per_jiffy;
> static u32 mcftmr_cnt;
>
> -static irq_handler_t timer_interrupt;
> -
> /***************************************************************************/
>
> static void init_timer_irq(void)
> @@ -77,7 +75,8 @@ static irqreturn_t mcftmr_tick(int irq, void *dummy)
> __raw_writeb(MCFTIMER_TER_CAP | MCFTIMER_TER_REF, TA(MCFTIMER_TER));
>
> mcftmr_cnt += mcftmr_cycles_per_jiffy;
> - return timer_interrupt(irq, dummy);
> + legacy_timer_tick(1);
> + return IRQ_HANDLED;
> }
>
> /***************************************************************************/
> @@ -126,7 +125,6 @@ void hw_timer_init(irq_handler_t handler)
>
> clocksource_register_hz(&mcftmr_clk, FREQ);
>
> - timer_interrupt = handler;
> init_timer_irq();
> r = request_irq(MCF_IRQ_TIMER, mcftmr_tick, IRQF_TIMER, "timer", NULL);
> if (r) {
>