[PATCH v3 6/8] phy: miphy28lp: Add SSC support for PCIE
From: Valdis.Kletnieks at vt.edu <hidden>
Date: 2014-09-29 19:22:14
Also in:
linux-devicetree, lkml
From: Valdis.Kletnieks at vt.edu <hidden>
Date: 2014-09-29 19:22:14
Also in:
linux-devicetree, lkml
On Fri, 26 Sep 2014 10:54:15 +0200, Gabriel FERNANDEZ said:
SSC is the technique of modulating the operating frequency of a signal slightly to spread its radiated emissions over a range of frequencies. This reduction in the maximum emission for a given frequency helps meet radiated emission requirements. These settings are applicable for PCIE with Internal clock.
+ writeb_relaxed(0x69, miphy_phy->base + MIPHY_PLL_SBR_3); + writeb_relaxed(0x21, miphy_phy->base + MIPHY_PLL_SBR_4); + writeb_relaxed(0x3c, miphy_phy->base + MIPHY_PLL_SBR_2); + writeb_relaxed(0x21, miphy_phy->base + MIPHY_PLL_SBR_4); + writeb_relaxed(0x00, miphy_phy->base + MIPHY_PLL_SBR_1); + writeb_relaxed(0x02, miphy_phy->base + MIPHY_PLL_SBR_1); + writeb_relaxed(0x00, miphy_phy->base + MIPHY_PLL_SBR_1);
I'd feel a lot better about all these magic numbers (and the triple write to SBR_1) if the Changelog or something referenced where they came from.... -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 848 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20140929/b7d5b790/attachment.sig>