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Message-ID: <CAMQu2gzBjnuc=zZ+Ug+YW+ViQFr25YuWFHBL5iXQDJ_7dPtAOg@mail.gmail.com> Date: Thu, 3 May 2012 11:45:37 +0530 From: "Shilimkar, Santosh" <santosh.shilimkar@...com> To: Greg KH <gregkh@...uxfoundation.org> Cc: linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Subject: Re: [PATCH v5 0/7] Add TI EMIF SDRAM controller driver On Wed, May 2, 2012 at 11:33 PM, Greg KH <gregkh@...uxfoundation.org> wrote: > On Wed, May 02, 2012 at 12:20:24PM +0530, Santosh Shilimkar wrote: >> Greg, >> >> On Wednesday 02 May 2012 10:46 AM, Greg KH wrote: >> > On Fri, Apr 27, 2012 at 05:54:02PM +0530, Santosh Shilimkar wrote: >> >> Add a driver for the EMIF SDRAM controller used in Texas Instrument SoCs >> >> >> >> EMIF is an SDRAM controller that supports, based on its revision, >> >> one or more of LPDDR2/DDR2/DDR3 protocols.This driver adds support >> >> for LPDDR2. >> >> >> >> The driver supports the following features: >> >> - Calculates the DDR AC timing parameters to be set in EMIF >> >> registers using data from the device data-sheets and based >> >> on the DDR frequency. If data from data-sheets is not available >> >> default timing values from the JEDEC spec are used. These >> >> will be safe, but not necessarily optimal >> >> - API for changing timings during DVFS or at boot-up >> >> - Temperature alert configuration and handling of temperature >> >> alerts, if any for LPDDR2 devices >> >> * temperature alert is based on periodic polling of MR4 mode >> >> register in DDR devices automatically performed by hardware >> >> * timings are de-rated and brought back to nominal when >> >> temperature raises and falls respectively >> >> - Cache of calculated register values to avoid re-calculating >> >> them >> >> >> >> The driver will need some minor updates when it is eventually >> >> integrated with Dynamic Voltage and Frequency Scaling (DVFS). >> >> This can not be done now as DVFS support is not available in >> >> the mainline yet. >> >> >> >> Discussions with Santosh Shilimkar <santosh.shilimkar@...com> >> >> were immensely helpful in shaping up the interfaces. Vibhore Vardhan >> >> <vvardhan@...il.com> did the initial code snippet for thermal >> >> handling. >> >> >> >> Testing: >> >> - The driver is tested on OMAP4430 SDP. >> >> - The driver in a slightly adapted form is also tested on OMAP5. >> >> - Since mainline kernel doesn't have DVFS support yet, >> >> testing was done using a test module. >> >> - Temperature alert handling was tested with simulated interrupts >> >> and faked temperature values as testing all cases in real-life >> >> scenarios is difficult. >> >> - Tested the driver as a module >> >> >> >> Cc: Greg KH <greg@...ah.com> >> > >> > This all looks good to me now, thanks for reworking this. >> > >> > So, do you want me to take this through my "driver" tree to get to Linus >> > for 3.5, or do you want it to go through somewhere else? >> > >> > If somewhere else, that's fine with me, consider this an: >> > Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> >> > >> > If you want me to take it, just let me know, whichever you prefer is >> > fine with me. >> > >> Can you take this one through your 3.5 driver tree please ? >> Thanks for help. > > Ok, all now applied. > Thanks !! Regards Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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