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1fc1263bd4
Add documentation of the fsl,no-spread-spectrum option. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Tejun Heo <tj@kernel.org>
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
* Freescale i.MX AHCI SATA Controller
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The Freescale i.MX SATA controller mostly conforms to the AHCI interface
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with some special extensions at integration level.
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Required properties:
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- compatible : should be one of the following:
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- "fsl,imx53-ahci" for i.MX53 SATA controller
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- "fsl,imx6q-ahci" for i.MX6Q SATA controller
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- interrupts : interrupt mapping for SATA IRQ
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- reg : registers mapping
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- clocks : list of clock specifiers, must contain an entry for each
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required entry in clock-names
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- clock-names : should include "sata", "sata_ref" and "ahb" entries
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Optional properties:
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- fsl,transmit-level-mV : transmit voltage level, in millivolts.
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- fsl,transmit-boost-mdB : transmit boost level, in milli-decibels
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- fsl,transmit-atten-16ths : transmit attenuation, in 16ths
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- fsl,receive-eq-mdB : receive equalisation, in milli-decibels
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Please refer to the technical documentation or the driver source code
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for the list of legal values for these options.
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- fsl,no-spread-spectrum : disable spread-spectrum clocking on the SATA
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link.
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Examples:
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sata@02200000 {
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compatible = "fsl,imx6q-ahci";
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reg = <0x02200000 0x4000>;
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interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clks IMX6QDL_CLK_SATA>,
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<&clks IMX6QDL_CLK_SATA_REF_100M>,
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<&clks IMX6QDL_CLK_AHB>;
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clock-names = "sata", "sata_ref", "ahb";
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};
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