lkml.org 
[lkml]   [2014]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 01/12] rtc: omap: fix clock-source configuration
On Thu, Oct 09, 2014 at 09:06:23PM +0200, Johan Hovold wrote:
> Make sure not to reset the clock-source configuration when enabling the
> 32kHz clock mux.
>
> Until the clock source can be configured through device tree we must not
> overwrite settings made by the bootloader (e.g. clock-source selection).
>
> Fixes: cd914bba03d8 ("drivers/rtc/rtc-omap.c: add support for enabling
> 32khz clock")
> Cc: stable <stable@vger.kernel.org>
>
> Signed-off-by: Johan Hovold <johan@kernel.org>

Reviewed-by: Felipe Balbi <balbi@ti.com>

> ---
> drivers/rtc/rtc-omap.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
> index 21142e6574a9..f842c216f2dd 100644
> --- a/drivers/rtc/rtc-omap.c
> +++ b/drivers/rtc/rtc-omap.c
> @@ -431,8 +431,10 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
> rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
>
> /* enable RTC functional clock */
> - if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN)
> - rtc_writel(OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
> + if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN) {
> + reg = rtc_read(OMAP_RTC_OSC_REG);
> + rtc_writel(reg | OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
> + }
>
> /* clear old status */
> reg = rtc_read(OMAP_RTC_STATUS_REG);
> --
> 2.0.4
>

--
balbi
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2014-10-10 20:21    [W:1.146 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site