linux-kernel - [PATCH 4/5] clocksource/drivers/renesas-ostm: Use unique device name instead of ostm

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Message-Id: <20191104142257.30029-4-daniel.lezcano@linaro.org>
Date:   Mon,  4 Nov 2019 15:22:56 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        linux-stm32@...md-mailman.stormreply.com (moderated list:ARM/STM32
        ARCHITECTURE),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/STM32
        ARCHITECTURE)
Subject: [PATCH 4/5] clocksource/drivers/renesas-ostm: Use unique device name instead of ostm

From: Geert Uytterhoeven <geert+renesas@...der.be>

Currently all OSTM devices are called "ostm", also in kernel messages.

As there can be multiple instances in an SoC, this can confuse the user.
Hence construct a unique name from the DT node name, like is done for
platform devices.

On RSK+RZA1, the boot log changes like:

    -clocksource: ostm: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 57352151442 ns
    +clocksource: timer@...ec000: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 57352151442 ns
     sched_clock: 32 bits at 33MHz, resolution 30ns, wraps every 64440619504ns
    -ostm: used for clocksource
    -ostm: used for clock events
    +/soc/timer@...ec000: used for clocksource
    +/soc/timer@...ec400: used for clock events
     ...
    -clocksource: Switched to clocksource ostm
    +clocksource: Switched to clocksource timer@...ec000

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/20191016144747.29538-5-geert+renesas@glider.be
---
 drivers/clocksource/renesas-ostm.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/clocksource/renesas-ostm.c b/drivers/clocksource/renesas-ostm.c
index 46012d905604..3d06ba66008c 100644
--- a/drivers/clocksource/renesas-ostm.c
+++ b/drivers/clocksource/renesas-ostm.c
@@ -64,9 +64,9 @@ static int __init ostm_init_clksrc(struct timer_of *to)
 	writeb(CTL_FREERUN, timer_of_base(to) + OSTM_CTL);
 	writeb(TS, timer_of_base(to) + OSTM_TS);
 
-	return clocksource_mmio_init(timer_of_base(to) + OSTM_CNT, "ostm",
-				     timer_of_rate(to), 300, 32,
-				     clocksource_mmio_readl_up);
+	return clocksource_mmio_init(timer_of_base(to) + OSTM_CNT,
+				     to->np->full_name, timer_of_rate(to), 300,
+				     32, clocksource_mmio_readl_up);
 }
 
 static u64 notrace ostm_read_sched_clock(void)
@@ -190,13 +190,13 @@ static int __init ostm_init(struct device_node *np)
 			goto err_cleanup;
 
 		ostm_init_sched_clock(to);
-		pr_info("ostm: used for clocksource\n");
+		pr_info("%pOF: used for clocksource\n", np);
 	} else {
 		ret = ostm_init_clkevt(to);
 		if (ret)
 			goto err_cleanup;
 
-		pr_info("ostm: used for clock events\n");
+		pr_info("%pOF: used for clock events\n", np);
 	}
 
 	return 0;
-- 
2.17.1