> -----Original Message----- > From: Paul Walmsley [mailto:paul@xxxxxxxxx] > Sent: Tuesday, July 08, 2008 8:25 AM > To: linux-omap@xxxxxxxxxxxxxxx > Cc: Rajendra Nayak; Igor Stoppa > Subject: [PATCH 0/9] OMAP2/3 SDRC/clock: control CORE M2 > divider, clean up SDRC > > This patch series has three main objectives: > > - connect Rajendra Nayak's existing OMAP3 SRAM code for CORE DPLL M2 > divider reprogramming to the OMAP3 clock tree; > > - create a sane method to pass SDRAM timing parameters from board-*.c > files into the SDRC, to allow optimal timing parameters to be set > for a given clock rate; > > - clean up the existing OMAP2/3 SDRC code. > > > A few notes: > > - The M2 divider switch does not seem to work consistently on the > 3430SDP I use to test. In particular, the switch back to > M2=1 results > in a hung console. SRAM being mapped as cacheable could be a possible reason for this. > > - Four SDRC rates are currently defined for the two SDRAM chip > registers included in this patch set. The 165MHz and 83MHz rates > are unusual and are intended to match the TI OPP rates set by the > u-boot installation on the local 3430SDP. 133MHz and 66MHz rates > are also present; per CDP 12.17, apparently these are used on Beagle > and OMAP3EVM - not sure if these rates should also be derated > slightly? > > > The SDRAM timing parameter infrastructure is currently only used for > OMAP3, but can be also extended to OMAP2 devices once information on > the SDRAM parts used on those boards is available. > > Thanks to Rajendra Nayak <rnayak@xxxxxx> and Igor > Stoppa <igor.stoppa@xxxxxxxxx> for finding some of the SDRAM > datasheets for this patch set. > > Compile-tested for N800, 2430SDP, OMAP3430SDP, OMAP3EVM, OMAP3 Beagle. > Runtime-tested on OMAP3430SDP ES2. > > If you have the debugfs set_rate patch, you can test the M2 divider > code on OMAP3430SDP via: > > cd /debug/clock/virt_26m_ck/osc_sys_ck/sys_ck/dpll3_ck/dpll3_m2_ck > > # Switch to M2 = 2 (assuming DPLL3 at 331MHz) > echo -n 165941176 > rate > > # Switch back to M2 = 1 > echo -n 331882352 > rate > > > Signed-off-by: Paul Walmsley <paul@xxxxxxxxx> > > --- > > size: > text data bss dec hex filename > 3404220 159104 108240 3671564 38060c vmlinux.3430sdp > 3403080 159200 108208 3670488 3801d8 vmlinux.3430sdp.patched > > diffstat: > arch/arm/mach-omap2/Makefile | 6 + > arch/arm/mach-omap2/board-2430sdp.c | 2 > arch/arm/mach-omap2/board-3430sdp.c | 4 > arch/arm/mach-omap2/board-apollon.c | 2 > arch/arm/mach-omap2/board-generic.c | 2 > arch/arm/mach-omap2/board-h4.c | 2 > arch/arm/mach-omap2/board-ldp.c | 2 > arch/arm/mach-omap2/board-n800.c | 2 > arch/arm/mach-omap2/board-omap2evm.c | 2 > arch/arm/mach-omap2/board-omap3beagle.c | 4 > arch/arm/mach-omap2/board-omap3evm.c | 4 > arch/arm/mach-omap2/clock.c | 2 > arch/arm/mach-omap2/clock24xx.c | 25 +-- > arch/arm/mach-omap2/clock34xx.c | 68 +++++++- > arch/arm/mach-omap2/clock34xx.h | 9 - > arch/arm/mach-omap2/gpmc.c | 2 > arch/arm/mach-omap2/io.c | 8 - > arch/arm/mach-omap2/memory.c | 179 > -------------------- > arch/arm/mach-omap2/memory.h | 43 ----- > arch/arm/mach-omap2/sdram-micron-mt46h32m32lf-6.h | 55 ++++++ > .../mach-omap2/sdram-qimonda-hyb18m512160af-6.h | 55 ++++++ > arch/arm/mach-omap2/sdrc.c | 93 ++++++++++ > arch/arm/mach-omap2/sdrc2xxx.c | 164 > ++++++++++++++++++ > arch/arm/mach-omap2/sram34xx.S | 84 +++------ > arch/arm/plat-omap/common.c | 2 > arch/arm/plat-omap/sram.c | 63 ++----- > include/asm-arm/arch-omap/common.h | 2 > include/asm-arm/arch-omap/gpmc.h | 1 > include/asm-arm/arch-omap/io.h | 4 > include/asm-arm/arch-omap/sdrc.h | 64 ++++++- > include/asm-arm/arch-omap/sram.h | 25 +-- > 31 files changed, 597 insertions(+), 383 deletions(-) > delete mode 100644 arch/arm/mach-omap2/memory.c > delete mode 100644 arch/arm/mach-omap2/memory.h > create mode 100644 arch/arm/mach-omap2/sdram-micron-mt46h32m32lf-6.h > create mode 100644 > arch/arm/mach-omap2/sdram-qimonda-hyb18m512160af-6.h > create mode 100644 arch/arm/mach-omap2/sdrc.c > create mode 100644 arch/arm/mach-omap2/sdrc2xxx.c > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
