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From: "tip-bot2 for Tony Lindgren" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Grygorii Strashko <grygorii.strashko@ti.com>,
	Keerthy <j-keerthy@ti.com>, Lokesh Vutla <lokeshvutla@ti.com>,
	Rob Herring <robh@kernel.org>, Tero Kristo <t-kristo@ti.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Tony Lindgren <tony@atomide.com>, x86 <x86@kernel.org>
Subject: [tip: timers/core] clocksource/drivers/timer-ti-32k: Add support for initializing directly
Date: Mon, 01 Jun 2020 13:11:43 -0000
Message-ID: <159101710385.17951.6835121820784885612.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200507172330.18679-2-tony@atomide.com>

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     46b30515f97ece3da661b251e4a0ad9ac7a338d3
Gitweb:        https://git.kernel.org/tip/46b30515f97ece3da661b251e4a0ad9ac7a338d3
Author:        Tony Lindgren <tony@atomide.com>
AuthorDate:    Thu, 07 May 2020 10:23:17 -07:00
Committer:     Daniel Lezcano <daniel.lezcano@linaro.org>
CommitterDate: Sat, 23 May 2020 00:01:04 +02:00

clocksource/drivers/timer-ti-32k: Add support for initializing directly

Let's allow probing the 32k counter directly based on devicetree data to
prepare for dropping the related legacy platform code. Let's only do this
if the parent node is compatible with ti-sysc to make sure we have the
related devicetree data available.

Let's also show the 32k counter information before registering the
clocksource, now we see it after the clocksource information which is a
bit confusing.

Cc: linux-kernel@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200507172330.18679-2-tony@atomide.com
---
 drivers/clocksource/timer-ti-32k.c | 48 ++++++++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-ti-32k.c b/drivers/clocksource/timer-ti-32k.c
index abd5f15..ae12bbf 100644
--- a/drivers/clocksource/timer-ti-32k.c
+++ b/drivers/clocksource/timer-ti-32k.c
@@ -24,6 +24,7 @@
  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
  */
 
+#include <linux/clk.h>
 #include <linux/init.h>
 #include <linux/time.h>
 #include <linux/sched_clock.h>
@@ -76,6 +77,49 @@ static u64 notrace omap_32k_read_sched_clock(void)
 	return ti_32k_read_cycles(&ti_32k_timer.cs);
 }
 
+static void __init ti_32k_timer_enable_clock(struct device_node *np,
+					     const char *name)
+{
+	struct clk *clock;
+	int error;
+
+	clock = of_clk_get_by_name(np->parent, name);
+	if (IS_ERR(clock)) {
+		/* Only some SoCs have a separate interface clock */
+		if (PTR_ERR(clock) == -EINVAL && !strncmp("ick", name, 3))
+			return;
+
+		pr_warn("%s: could not get clock %s %li\n",
+			__func__, name, PTR_ERR(clock));
+		return;
+	}
+
+	error = clk_prepare_enable(clock);
+	if (error) {
+		pr_warn("%s: could not enable %s: %i\n",
+			__func__, name, error);
+		return;
+	}
+}
+
+static void __init ti_32k_timer_module_init(struct device_node *np,
+					    void __iomem *base)
+{
+	void __iomem *sysc = base + 4;
+
+	if (!of_device_is_compatible(np->parent, "ti,sysc"))
+		return;
+
+	ti_32k_timer_enable_clock(np, "fck");
+	ti_32k_timer_enable_clock(np, "ick");
+
+	/*
+	 * Force idle module as wkup domain is active with MPU.
+	 * No need to tag the module disabled for ti-sysc probe.
+	 */
+	writel_relaxed(0, sysc);
+}
+
 static int __init ti_32k_timer_init(struct device_node *np)
 {
 	int ret;
@@ -90,6 +134,7 @@ static int __init ti_32k_timer_init(struct device_node *np)
 		ti_32k_timer.cs.flags |= CLOCK_SOURCE_SUSPEND_NONSTOP;
 
 	ti_32k_timer.counter = ti_32k_timer.base;
+	ti_32k_timer_module_init(np, ti_32k_timer.base);
 
 	/*
 	 * 32k sync Counter IP register offsets vary between the highlander
@@ -104,6 +149,8 @@ static int __init ti_32k_timer_init(struct device_node *np)
 	else
 		ti_32k_timer.counter += OMAP2_32KSYNCNT_CR_OFF_LOW;
 
+	pr_info("OMAP clocksource: 32k_counter at 32768 Hz\n");
+
 	ret = clocksource_register_hz(&ti_32k_timer.cs, 32768);
 	if (ret) {
 		pr_err("32k_counter: can't register clocksource\n");
@@ -111,7 +158,6 @@ static int __init ti_32k_timer_init(struct device_node *np)
 	}
 
 	sched_clock_register(omap_32k_read_sched_clock, 32, 32768);
-	pr_info("OMAP clocksource: 32k_counter at 32768 Hz\n");
 
 	return 0;
 }

  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-07 17:23 [PATCHv3 00/14] Update omaps to use drivers/clocksource timers Tony Lindgren
2020-05-07 17:23 ` [PATCH 01/14] clocksource/drivers/timer-ti-32k: Add support for initializing directly Tony Lindgren
2020-06-01 13:11   ` tip-bot2 for Tony Lindgren [this message]
2020-06-01 13:11   ` [tip: timers/core] " tip-bot2 for Tony Lindgren
2020-05-07 17:23 ` [PATCH 02/14] clocksource/drivers/timer-ti-dm: Add clockevent and clocksource support Tony Lindgren
2020-06-01 13:11   ` [tip: timers/core] " tip-bot2 for Tony Lindgren
2020-06-01 13:11   ` tip-bot2 for Tony Lindgren
2020-05-07 17:23 ` [PATCH 03/14] clk: ti: dm816: enable sysclk6_ck on init Tony Lindgren
2020-05-07 17:23 ` [PATCH 04/14] bus: ti-sysc: Ignore timer12 on secure omap3 Tony Lindgren
2020-05-07 17:23 ` [PATCH 05/14] ARM: OMAP2+: Add omap_init_time_of() Tony Lindgren
2020-05-07 17:23 ` [PATCH 06/14] ARM: dts: Configure system timers for am335x Tony Lindgren
2020-05-07 17:23 ` [PATCH 07/14] ARM: dts: Configure system timers for am437x Tony Lindgren
2020-05-07 17:23 ` [PATCH 08/14] ARM: dts: Configure system timers for omap4 Tony Lindgren
2020-05-07 17:23 ` [PATCH 09/14] ARM: dts: Configure system timers for omap5 and dra7 Tony Lindgren
2020-05-07 17:23 ` [PATCH 10/14] ARM: dts: Configure system timers for omap3 Tony Lindgren
2020-05-07 17:23 ` [PATCH 11/14] ARM: dts: Configure system timers for ti81xx Tony Lindgren
2020-05-07 17:23 ` [PATCH 12/14] ARM: dts: Configure system timers for omap2 Tony Lindgren
2020-05-07 17:23 ` [PATCH 13/14] ARM: OMAP2+: Drop old timer code for dmtimer and 32k counter Tony Lindgren
2020-05-07 17:23 ` [PATCH 14/14] bus: ti-sysc: Timers no longer need legacy quirk handling Tony Lindgren
2020-05-18 16:58 ` [PATCHv3 00/14] Update omaps to use drivers/clocksource timers Daniel Lezcano
2020-05-18 17:00   ` Tony Lindgren
2020-05-18 17:01     ` Daniel Lezcano

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