From: Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> To: rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Cc: Alessandro Zummo <a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org>, Juergen Beisert <jbe-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Subject: [PATCH 1/9] MXS/i.MX28: add the possibility to define the used crystals via device tree Date: Mon, 4 Mar 2013 15:05:40 +0100 [thread overview] Message-ID: <1362405948-12992-2-git-send-email-s.trumtrar@pengutronix.de> (raw) In-Reply-To: <1362405948-12992-1-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> From: Juergen Beisert <jbe-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> Signed-off-by: Juergen Beisert <jbe-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> Signed-off-by: Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> --- arch/arm/boot/dts/imx28.dtsi | 11 +++++++++++ drivers/clk/mxs/clk-imx28.c | 16 +++++++++++++++- 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi index 7ba4966..958bd10 100644 --- a/arch/arm/boot/dts/imx28.dtsi +++ b/arch/arm/boot/dts/imx28.dtsi @@ -37,6 +37,17 @@ }; }; + clocks { + #address-cells = <1>; + #size-cells = <0>; + + osc24m: system_oscillator { + compatible = "fsl,mxs-system", "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <24000000>; + }; + }; + apb@80000000 { compatible = "simple-bus"; #address-cells = <1>; diff --git a/drivers/clk/mxs/clk-imx28.c b/drivers/clk/mxs/clk-imx28.c index 76ce6c6..01048b5 100644 --- a/drivers/clk/mxs/clk-imx28.c +++ b/drivers/clk/mxs/clk-imx28.c @@ -158,7 +158,21 @@ int __init mx28_clocks_init(void) clk_misc_init(); - clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000); + /* retrieve the crystal's frequencies from device tree */ + for_each_compatible_node(np, NULL, "fixed-clock") { + u32 rate; + + if (of_property_read_u32(np, "clock-frequency", &rate)) + continue; + + if (of_device_is_compatible(np, "fsl,mxs-system")) + clks[ref_xtal] = mxs_clk_fixed("ref_xtal", rate); + } + + /* if not set, guess their frequency */ + if (clks[ref_xtal] == NULL) + clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000); + clks[pll0] = mxs_clk_pll("pll0", "ref_xtal", PLL0CTRL0, 17, 480000000); clks[pll1] = mxs_clk_pll("pll1", "ref_xtal", PLL1CTRL0, 17, 480000000); clks[pll2] = mxs_clk_pll("pll2", "ref_xtal", PLL2CTRL0, 23, 50000000); -- 1.7.10.4
WARNING: multiple messages have this Message-ID (diff)
From: s.trumtrar@pengutronix.de (Steffen Trumtrar) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/9] MXS/i.MX28: add the possibility to define the used crystals via device tree Date: Mon, 4 Mar 2013 15:05:40 +0100 [thread overview] Message-ID: <1362405948-12992-2-git-send-email-s.trumtrar@pengutronix.de> (raw) In-Reply-To: <1362405948-12992-1-git-send-email-s.trumtrar@pengutronix.de> From: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> --- arch/arm/boot/dts/imx28.dtsi | 11 +++++++++++ drivers/clk/mxs/clk-imx28.c | 16 +++++++++++++++- 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi index 7ba4966..958bd10 100644 --- a/arch/arm/boot/dts/imx28.dtsi +++ b/arch/arm/boot/dts/imx28.dtsi @@ -37,6 +37,17 @@ }; }; + clocks { + #address-cells = <1>; + #size-cells = <0>; + + osc24m: system_oscillator { + compatible = "fsl,mxs-system", "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <24000000>; + }; + }; + apb at 80000000 { compatible = "simple-bus"; #address-cells = <1>; diff --git a/drivers/clk/mxs/clk-imx28.c b/drivers/clk/mxs/clk-imx28.c index 76ce6c6..01048b5 100644 --- a/drivers/clk/mxs/clk-imx28.c +++ b/drivers/clk/mxs/clk-imx28.c @@ -158,7 +158,21 @@ int __init mx28_clocks_init(void) clk_misc_init(); - clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000); + /* retrieve the crystal's frequencies from device tree */ + for_each_compatible_node(np, NULL, "fixed-clock") { + u32 rate; + + if (of_property_read_u32(np, "clock-frequency", &rate)) + continue; + + if (of_device_is_compatible(np, "fsl,mxs-system")) + clks[ref_xtal] = mxs_clk_fixed("ref_xtal", rate); + } + + /* if not set, guess their frequency */ + if (clks[ref_xtal] == NULL) + clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000); + clks[pll0] = mxs_clk_pll("pll0", "ref_xtal", PLL0CTRL0, 17, 480000000); clks[pll1] = mxs_clk_pll("pll1", "ref_xtal", PLL1CTRL0, 17, 480000000); clks[pll2] = mxs_clk_pll("pll2", "ref_xtal", PLL2CTRL0, 23, 50000000); -- 1.7.10.4
next prev parent reply other threads:[~2013-03-04 14:05 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-03-04 14:05 [PATCH 0/9] rtc: stmp3xxx: DT bindings and wakealarm Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-1-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-04 14:05 ` Steffen Trumtrar [this message] 2013-03-04 14:05 ` [PATCH 1/9] MXS/i.MX28: add the possibility to define the used crystals via device tree Steffen Trumtrar [not found] ` <1362405948-12992-2-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:17 ` Shawn Guo 2013-03-07 6:17 ` Shawn Guo 2013-03-04 14:05 ` [PATCH 2/9] MXS/i.MX28: add the possibility to define the external RTC crystal Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-3-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:33 ` Shawn Guo 2013-03-07 6:33 ` Shawn Guo 2013-03-04 14:05 ` [PATCH 3/9] MXS/i.MX28: prepare different clocking of the built-in RTC Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-4-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:40 ` Shawn Guo 2013-03-07 6:40 ` Shawn Guo 2013-03-04 14:05 ` [PATCH 4/9] MXS/i.MX28: there is more than one way to clock the RTC Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-5-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-07 6:48 ` Shawn Guo 2013-03-07 6:48 ` Shawn Guo [not found] ` <20130307064824.GD5372-rvtDTF3kK1ictlrPMvKcciBecyulp+rMXqFh9Ls21Oc@public.gmane.org> 2013-03-07 8:19 ` Steffen Trumtrar 2013-03-07 8:19 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 5/9] MXS/i.MX28: enable RTC to wakeup the system Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 6/9] rtc: stmp3xxx: add sysfs entries for persistent regs Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar [not found] ` <1362405948-12992-7-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-04 15:14 ` Grant Likely 2013-03-04 15:14 ` Grant Likely [not found] ` <CACxGe6swW-UDH1cUw1D8P+gyhDC8nDZur-A_m_NBfeRUxcg9Jw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-03-05 8:02 ` Steffen Trumtrar 2013-03-05 8:02 ` Steffen Trumtrar [not found] ` <20130305080252.GA7042-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> 2013-03-06 13:27 ` Steffen Trumtrar 2013-03-06 13:27 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 7/9] rtc: stmp3xxx: Re-enable active alarm Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 8/9] rtc: stmp3xxx: Check copy controller state Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar 2013-03-04 14:05 ` [PATCH 9/9] rtc: stmp3xxx: Replace wait_time function Steffen Trumtrar 2013-03-04 14:05 ` Steffen Trumtrar
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