linux-kernel - [PATCH 06/16] clocksource/drivers/timer-atmel-tcb: Fill tcb

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Message-Id: <20200723152639.639771-6-daniel.lezcano@linaro.org>
Date:   Thu, 23 Jul 2020 17:26:26 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     tglx@...utronix.de
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        linux-kernel@...r.kernel.org (open list:CLOCKSOURCE, CLOCKEVENT DRIVERS),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Microchip
        (AT91) SoC support)
Subject: [PATCH 06/16] clocksource/drivers/timer-atmel-tcb: Fill tcb_config

From: Alexandre Belloni <alexandre.belloni@...tlin.com>

Use the tcb_config and struct atmel_tcb_config to get the timer counter
width. This is necessary because atmel_tcb_config will be extended later
on.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/20200710230813.1005150-7-alexandre.belloni@bootlin.com
---
 drivers/clocksource/timer-atmel-tcb.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/clocksource/timer-atmel-tcb.c b/drivers/clocksource/timer-atmel-tcb.c
index b255a4a1a36b..423af2f9835f 100644
--- a/drivers/clocksource/timer-atmel-tcb.c
+++ b/drivers/clocksource/timer-atmel-tcb.c
@@ -348,9 +348,17 @@ static void __init tcb_setup_single_chan(struct atmel_tc *tc, int mck_divisor_id
 
 static const u8 atmel_tcb_divisors[] = { 2, 8, 32, 128 };
 
+static struct atmel_tcb_config tcb_rm9200_config = {
+	.counter_width = 16,
+};
+
+static struct atmel_tcb_config tcb_sam9x5_config = {
+	.counter_width = 32,
+};
+
 static const struct of_device_id atmel_tcb_of_match[] = {
-	{ .compatible = "atmel,at91rm9200-tcb", .data = (void *)16, },
-	{ .compatible = "atmel,at91sam9x5-tcb", .data = (void *)32, },
+	{ .compatible = "atmel,at91rm9200-tcb", .data = &tcb_rm9200_config, },
+	{ .compatible = "atmel,at91sam9x5-tcb", .data = &tcb_sam9x5_config, },
 	{ /* sentinel */ }
 };
 
@@ -398,7 +406,11 @@ static int __init tcb_clksrc_init(struct device_node *node)
 	}
 
 	match = of_match_node(atmel_tcb_of_match, node->parent);
-	bits = (uintptr_t)match->data;
+	if (!match)
+		return -ENODEV;
+
+	tc.tcb_config = match->data;
+	bits = tc.tcb_config->counter_width;
 
 	for (i = 0; i < ARRAY_SIZE(tc.irq); i++)
 		writel(ATMEL_TC_ALL_IRQ, tc.regs + ATMEL_TC_REG(i, IDR));
-- 
2.25.1