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=6123&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...@ti.com> Signed-off-by: Nishanth Menon <n...@ti.com> Signed-off-by: Vikram Pandita <vikram.pand...@ti.com> Cc: Allen Pais <allen.p...@ti.com> Cc: Anand Gadiyar <gadi...@ti.com> Cc: Benoit Cousson <b-cous...@ti.com> Cc: Kevin Hilman <khil...@deeprootsystems.com> Cc: Sanjeev Premi <pr...@ti.com> Cc: Santosh Shilimkar <santosh.shilim...@ti.com> Cc: Sergio Alberto Aguirre Rodriguez <saagui...@ti.com> Cc: Tony Lindgren <t...@atomide.com> --- 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 -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
