lkml.org 
[lkml]   [2019]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 8/8] clocksource/drivers/timer-atmel-tcb: add sama5d2 support
Date
The first divisor for the sama5d2 is actually the gclk selector. Because
the currently remaining divisors are fitting the use case, currently ensure
it is skipped.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clocksource/timer-atmel-tcb.c | 11 ++++++++++-
include/soc/at91/atmel_tcb.h | 1 +
2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/timer-atmel-tcb.c b/drivers/clocksource/timer-atmel-tcb.c
index ccb77b9cb489..e373b02d509a 100644
--- a/drivers/clocksource/timer-atmel-tcb.c
+++ b/drivers/clocksource/timer-atmel-tcb.c
@@ -359,9 +359,15 @@ static struct atmel_tcb_config tcb_sam9x5_config = {
.counter_width = 32,
};

+static struct atmel_tcb_config tcb_sama5d2_config = {
+ .counter_width = 32,
+ .has_gclk = 1,
+};
+
static const struct of_device_id atmel_tcb_of_match[] = {
{ .compatible = "atmel,at91rm9200-tcb", .data = &tcb_rm9200_config, },
{ .compatible = "atmel,at91sam9x5-tcb", .data = &tcb_sam9x5_config, },
+ { .compatible = "atmel,sama5d2-tcb", .data = &tcb_sama5d2_config, },
{ /* sentinel */ }
};

@@ -426,7 +432,10 @@ static int __init tcb_clksrc_init(struct device_node *node)

/* How fast will we be counting? Pick something over 5 MHz. */
rate = (u32) clk_get_rate(t0_clk);
- for (i = 0; i < ARRAY_SIZE(atmel_tcb_divisors); i++) {
+ i = 0;
+ if (tc.tcb_config->has_gclk)
+ i = 1;
+ for (; i < ARRAY_SIZE(atmel_tcb_divisors); i++) {
unsigned divisor = atmel_tcb_divisors[i];
unsigned tmp;

diff --git a/include/soc/at91/atmel_tcb.h b/include/soc/at91/atmel_tcb.h
index c3c7200ce151..fbf5474f4484 100644
--- a/include/soc/at91/atmel_tcb.h
+++ b/include/soc/at91/atmel_tcb.h
@@ -39,6 +39,7 @@ struct clk;
*/
struct atmel_tcb_config {
size_t counter_width;
+ unsigned int has_gclk:1;
};

/**
--
2.21.0
\
 
 \ /
  Last update: 2019-10-10 00:40    [W:0.057 / U:32.100 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site