From: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V2 4/6] pcmcia: soc-common: enable/disable socket clocks
Date: Mon, 24 Nov 2014 23:05:34 +0000 [thread overview]
Message-ID: <1416870336-30114-5-git-send-email-dbaryshkov@gmail.com> (raw)
In-Reply-To: <1416870336-30114-1-git-send-email-dbaryshkov@gmail.com>
Call clk_prepare_enable() during hw_init() and clk_disable_unprepare()
during hw_shutdown() to ensure that the clock rates returned by
clk_get_rate() are correct.
It is safe to call enable/disable functions even on NULL clock, so this
patch will not break cases when the socket clock is not set.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
---
drivers/pcmcia/soc_common.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c
index a2bc6ee..933f465 100644
--- a/drivers/pcmcia/soc_common.c
+++ b/drivers/pcmcia/soc_common.c
@@ -120,6 +120,8 @@ static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt,
if (skt->ops->hw_shutdown)
skt->ops->hw_shutdown(skt);
+
+ clk_disable_unprepare(skt->clk);
}
static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
@@ -131,6 +133,8 @@ static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
int ret = 0, i;
+ clk_prepare_enable(skt->clk);
+
if (skt->ops->hw_init) {
ret = skt->ops->hw_init(skt);
if (ret)
--
2.1.3
next prev parent reply other threads:[~2014-11-24 23:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 23:05 [PATCH V2 0/6] ARM: sa1100: use clock api to get cpu freq in fb and pcmcia drivers Dmitry Eremin-Solenikov
2014-11-24 23:05 ` [PATCH V2 1/6] ARM: sa1100: add cpu clock Dmitry Eremin-Solenikov
2014-11-24 23:05 ` [PATCH V2 2/6] ARM: sa1100: add a clock alias for sa1111 pcmcia device Dmitry Eremin-Solenikov
2014-11-24 23:05 ` [PATCH V2 3/6] fbdev: sa1100fb: make use of device clock Dmitry Eremin-Solenikov
2014-11-24 23:05 ` Dmitry Eremin-Solenikov [this message]
2014-11-24 23:05 ` [PATCH V2 5/6] pcmcia: sa1111: provide " Dmitry Eremin-Solenikov
2014-11-24 23:05 ` [PATCH V2 6/6] pcmcia: sa1100: make use of " Dmitry Eremin-Solenikov
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