[PATCH v2 2/9] ARM: i.MX28: define external RTC crystal in DT
From: Steffen Trumtrar <hidden>
Date: 2013-03-08 09:01:37
Subsystem:
common clk framework, nxp i.mx clock drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Abel Vesa, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Juergen Beisert <redacted> The RTC in the i.MX28 may be clocked with different crystals. Get the rate of the connected one from the DT. Signed-off-by: Juergen Beisert <redacted> Signed-off-by: Steffen Trumtrar <redacted> --- Documentation/devicetree/bindings/clock/imx28-clock.txt | 1 + arch/arm/boot/dts/imx28.dtsi | 6 ++++++ drivers/clk/mxs/clk-imx28.c | 4 +++- 3 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/clock/imx28-clock.txt b/Documentation/devicetree/bindings/clock/imx28-clock.txt
index e6587af..c3a9d94 100644
--- a/Documentation/devicetree/bindings/clock/imx28-clock.txt
+++ b/Documentation/devicetree/bindings/clock/imx28-clock.txt@@ -76,6 +76,7 @@ clocks and IDs. usb0_phy 62 usb1_phy 63 enet_out 64 + rtc_32k 65 Examples:
diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
index b9e3712..0393d3f 100644
--- a/arch/arm/boot/dts/imx28.dtsi
+++ b/arch/arm/boot/dts/imx28.dtsi@@ -46,6 +46,12 @@ #clock-cells = <0>; clock-frequency = <24000000>; }; + + osc32k: rtc-oscillator { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <0>; + }; }; apb@80000000 {
diff --git a/drivers/clk/mxs/clk-imx28.c b/drivers/clk/mxs/clk-imx28.c
index 01048b5..acf2762 100644
--- a/drivers/clk/mxs/clk-imx28.c
+++ b/drivers/clk/mxs/clk-imx28.c@@ -141,7 +141,7 @@ enum imx28_clk { clk32k_div, rtc, lradc, spdif_div, clk32k, pwm, uart, ssp0, ssp1, ssp2, ssp3, gpmi, spdif, emi, saif0, saif1, lcdif, etm, fec, can0, can1, usb0, usb1, usb0_phy, usb1_phy, enet_out, - clk_max + rtc_32k, clk_max }; static struct clk *clks[clk_max];
@@ -167,6 +167,8 @@ int __init mx28_clocks_init(void) if (of_device_is_compatible(np, "fsl,mxs-system")) clks[ref_xtal] = mxs_clk_fixed("ref_xtal", rate); + else if (!strncmp(np->name, "rtc-oscillator", strlen("rtc-oscillator"))) + clks[rtc_32k] = mxs_clk_fixed("rtc32k", rate); } /* if not set, guess their frequency */
--
1.8.2.rc2