From: Michael Olbrich <m.olbrich@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Michael Olbrich <m.olbrich@pengutronix.de>
Subject: [PATCH] fixup! efi: clocksoure: add EFI event timer
Date: Mon, 13 Mar 2017 14:16:06 +0100 [thread overview]
Message-ID: <20170313131606.8089-1-m.olbrich@pengutronix.de> (raw)
In-Reply-To: <B918A2C9-9BD1-41C2-B996-98A0B775327F@jcrosoft.com>
---
I played with the numbers a bit. This hardware has a 18 Hz tick :-/.
That's not really useful so just skipping the clocksource is probably the
best solution.
Michael
drivers/clocksource/efi.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/clocksource/efi.c b/drivers/clocksource/efi.c
index 89906c452eb7..fb5b7ca63de9 100644
--- a/drivers/clocksource/efi.c
+++ b/drivers/clocksource/efi.c
@@ -71,6 +71,10 @@ static int efi_cs_init(struct clocksource *cs)
uint64_t nb_100ns;
freq = ticks_freq_x86();
+ if (freq == 0) {
+ BS->close_event(efi_cs_evt);
+ return -ENODEV;
+ }
nb_100ns = 10 * 1000 * 1000 / freq;
pr_warn("EFI Event timer too slow freq = %llu Hz\n", freq);
efiret = BS->set_timer(efi_cs_evt, EFI_TIMER_PERIODIC, nb_100ns);
--
2.11.0
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next prev parent reply other threads:[~2017-03-13 13:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-27 10:14 [PATCH 0/8] add generic EFI timer Jean-Christophe PLAGNIOL-VILLARD
2017-02-27 10:19 ` [PATCH 1/8] efi: add prototype and definition for creating and closing event Jean-Christophe PLAGNIOL-VILLARD
2017-02-27 10:19 ` [PATCH 2/8] efi: add prototype and definition for setting timer Jean-Christophe PLAGNIOL-VILLARD
2017-02-27 10:19 ` [PATCH 3/8] efi: move LoaderTimeInitUSec and LoaderDevicePartUUID to postcore initcall Jean-Christophe PLAGNIOL-VILLARD
2017-02-27 10:19 ` [PATCH 4/8] efi: move x86 clocksource init at core initcall level Jean-Christophe PLAGNIOL-VILLARD
2017-02-27 10:19 ` [PATCH 5/8] clocksource: allow to have multiple device from clock source Jean-Christophe PLAGNIOL-VILLARD
2017-02-28 7:09 ` Sascha Hauer
2017-03-01 15:52 ` Jean-Christophe PLAGNIOL-VILLARD
2017-03-02 7:36 ` Sascha Hauer
2017-02-27 10:19 ` [PATCH 6/8] efi: move x86 clocksource to device/driver Jean-Christophe PLAGNIOL-VILLARD
2017-02-27 10:19 ` [PATCH 7/8] efi: clocksoure: use event for timer Jean-Christophe PLAGNIOL-VILLARD
2017-03-13 10:30 ` Michael Olbrich
2017-03-13 10:52 ` Jean-Christophe PLAGNIOL-VILLARD
2017-03-13 13:16 ` Michael Olbrich [this message]
2017-03-13 15:55 ` [PATCH] fixup! efi: clocksoure: add EFI event timer Jean-Christophe PLAGNIOL-VILLARD
2017-03-14 7:16 ` Sascha Hauer
2017-02-27 10:19 ` [PATCH 8/8] efi: add veriable to report secure boot support and status Jean-Christophe PLAGNIOL-VILLARD
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