clocksource/drivers/timer-atmel-tcb: Fill tcb_config

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@bootlin.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200710230813.1005150-7-alexandre.belloni@bootlin.com

diff --git a/drivers/clocksource/timer-atmel-tcb.c b/drivers/clocksource/timer-atmel-tcb.c
index b255a4a..423af2f 100644 (file)
--- 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));