From mboxrd@z Thu Jan 1 00:00:00 1970 From: s.hauer@pengutronix.de (Sascha Hauer) Date: Fri, 3 Aug 2012 16:11:08 +0200 Subject: [PATCH 1/2] ARM: imx: enable emi_slow_gate clock for imx5 In-Reply-To: <1343919712-6240-1-git-send-email-shawn.guo@linaro.org> References: <1343919712-6240-1-git-send-email-shawn.guo@linaro.org> Message-ID: <20120803141108.GV1451@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Aug 02, 2012 at 11:01:51PM +0800, Shawn Guo wrote: > The imx5 common clock migration causes a regression with smsc911x > driver on imx53-ard board, where a smsc lan9220 controller gets > connected on imx53 with EIM interface. EIM needs clock emi_slow_gate > to be functional. In the new imx5 clock driver, there is no use count > incremented for the clock by enabling it, so the framework closes the > clock at late init time and makes EIM stop working then. > > Enable emi_slow_gate in clock driver initialization to fix the > regression. Can we add a comment that emi_slow_gate is needed for the EIM interface? It's not obvious from the datasheet and this information might help people who want to clean up the now unconditionally enabled clocks. Otherwise: Acked-by: Sascha Hauer Sascha > > Cc: stable at vger.kernel.org > Signed-off-by: Shawn Guo > --- > arch/arm/mach-imx/clk-imx51-imx53.c | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c > index f608669..6eee32a 100644 > --- a/arch/arm/mach-imx/clk-imx51-imx53.c > +++ b/arch/arm/mach-imx/clk-imx51-imx53.c > @@ -303,6 +303,7 @@ static void __init mx5_clocks_common_init(unsigned long rate_ckil, > clk_prepare_enable(clk[aips_tz2]); /* fec */ > clk_prepare_enable(clk[spba]); > clk_prepare_enable(clk[emi_fast_gate]); /* fec */ > + clk_prepare_enable(clk[emi_slow_gate]); > clk_prepare_enable(clk[tmax1]); > clk_prepare_enable(clk[tmax2]); /* esdhc2, fec */ > clk_prepare_enable(clk[tmax3]); /* esdhc1, esdhc4 */ > -- > 1.7.5.4 > > > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |