> -----Original Message----- > From: Menon, Nishanth > Sent: Thursday, October 08, 2009 10:17 AM > To: linux-omap > Cc: Menon, Nishanth; Chikkature Rajashekar, Madhusudhan; Pandita, Vikram; > Pais, Allen; Gadiyar, Anand; Cousson, Benoit; Kevin Hilman; Premi, > Sanjeev; Shilimkar, Santosh; Aguirre Rodriguez, Sergio Alberto; Tony > Lindgren > Subject: [RFC][PATCH] OMAP3: introduce OMAP3630 > > Device intro: > OMAP3630 is the latest in the family of OMAP3 devices > and among the changes it introduces are: > > New OPP levels for new voltage and frequency levels. a bunch of > Bug fixes to various modules feature additions, notably with ISP, > sDMA etc. > > Details about the chip is available here: > http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?templateId=61 > 23&navigationId=12836&contentId=52606 > > Strategy used: > Strategy to introduce this device into Linux was discussed here: > Ref: http://marc.info/?t=125343303400003&r=1&w=2 > > Two approaches were available: > a) Consider 3630 generation of devices as a new family of silicon > b) Consider 3630 as an offshoot of 3430 family of devices > > As a common consensus, (b) seems to be more valid for 3630 as: > * There are changes which are easily handled by looking at rev > * Most of existing 34xx infrastructure can be reused(almost 90%+) > - so no ugly if (cpu_is_omap34xx() || cpu_is_omap36xx()) > all over the place > - lesser chance of bugs due to reuse of proven code flow > - 36xx specific handling can still be done where required > within the existing infrastructure > > NOTE: > * If additional 34xx series are added, OMAP3430_REV_ESXXXX can be > added on top of the existing 3630 ones are renumbered > > This patch was tested on SDP3430. > > Signed-off-by: Madhusudhan Chikkature Rajashekar <madhu.cr@xxxxxx> > Signed-off-by: Nishanth Menon <nm@xxxxxx> > Signed-off-by: Vikram Pandita <vikram.pandita@xxxxxx> > Cc: Allen Pais <allen.pais@xxxxxx> > Cc: Anand Gadiyar <gadiyar@xxxxxx> > Cc: Benoit Cousson <b-cousson@xxxxxx> > Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> > Cc: Sanjeev Premi <premi@xxxxxx> > Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx> > Cc: Sergio Alberto Aguirre Rodriguez <saaguirre@xxxxxx> > Cc: Tony Lindgren <tony@xxxxxxxxxxx> > --- > arch/arm/mach-omap2/id.c | 33 > ++++++++++++++++++++++++++++++--- > arch/arm/plat-omap/include/mach/cpu.h | 6 ++++++ > 2 files changed, 36 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c > index 03b80f2..79193c6 100644 > --- a/arch/arm/mach-omap2/id.c > +++ b/arch/arm/mach-omap2/id.c > @@ -186,6 +186,7 @@ void __init omap3_check_revision(void) > { > u32 cpuid, idcode; > u16 hawkeye; > + u16 omap_type; > u8 rev; > char *rev_name = "ES1.0"; > > @@ -210,7 +211,10 @@ void __init omap3_check_revision(void) > hawkeye = (idcode >> 12) & 0xffff; > rev = (idcode >> 28) & 0xff; > > - if (hawkeye == 0xb7ae) { > + omap_type = omap_rev() >> 16; > + switch (hawkeye) { > + case 0xb7ae: > + /* Handle 34xx devices */ > switch (rev) { > case 0: > omap_revision = OMAP3430_REV_ES2_0; > @@ -231,12 +235,35 @@ void __init omap3_check_revision(void) > default: > /* Use the latest known revision as default */ > omap_revision = OMAP3430_REV_ES3_1; > - rev_name = "Unknown revision\n"; > + rev_name = "Unknown 34xx revision\n"; > + /* Fall through */ > } > + break; > + case 0xb891: > + /* Handle 36xx devices */ > + /* Over ride for display purposes */ > + omap_type = 0x3630; > + switch (rev) { > + case 0: > + omap_revision = OMAP3630_REV_ES1_0; > + rev_name = "ES1.0"; > + break; > + default: > + /* Use the latest known revision as default */ > + omap_revision = OMAP3630_REV_ES1_0; > + rev_name = "Unknown 36xx revision\n"; > + /* Fall through */ > + } > + break; > + default: > + /* Unknown default to latest rev as default*/ > + omap_revision = OMAP3630_REV_ES1_0; > + rev_name = "Unknown revision\n"; > + /* Fall through */ > } > > out: > - pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name); > + pr_info("OMAP%04x %s\n", omap_type, rev_name); > } > > #define OMAP3_SHOW_FEATURE(feat) \ > diff --git a/arch/arm/plat-omap/include/mach/cpu.h b/arch/arm/plat- > omap/include/mach/cpu.h > index 431fec4..af1080f 100644 > --- a/arch/arm/plat-omap/include/mach/cpu.h > +++ b/arch/arm/plat-omap/include/mach/cpu.h > @@ -383,6 +383,12 @@ IS_OMAP_TYPE(3430, 0x3430) > #define OMAP3430_REV_ES2_1 0x34302034 > #define OMAP3430_REV_ES3_0 0x34303034 > #define OMAP3430_REV_ES3_1 0x34304034 > +/* NOTE: Add 36xx series below > + * If additional 34xx series are added, OMAP3430_REV_ESXXXX can be > + * added above the 3630 defines and series renumbered to ensure > + * rev() > checks to work > + */ > +#define OMAP3630_REV_ES1_0 0x34305034 > > #define OMAP443X_CLASS 0x44300034 Was expecting that this patch will add "cpu_is_omap36xx()" in cpu.h apart from above. Is this handled in another patch ? Regards, Santosh -- 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
