From: Aneesh V <aneesh@xxxxxx>
Macros for identifying the max frequency supported by various
OMAP4 variants - Expanding along the lines of OMAP3's feature
handling.
[nm@xxxxxx: minor fixes for checks that should only for 443x|446x]
Signed-off-by: Nishanth Menon <nm@xxxxxx>
Signed-off-by: Aneesh V <aneesh@xxxxxx>
---
arch/arm/mach-omap2/id.c | 29 +++++++++++++++++++++++++++++
arch/arm/plat-omap/include/plat/cpu.h | 19 +++++++++++++++++++
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 3d43d64..a86d0f9 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -32,6 +32,7 @@ static struct omap_chip_id omap_chip;
static unsigned int omap_revision;
u32 omap3_features;
+u32 omap4_features;
unsigned int omap_rev(void)
{
@@ -212,6 +213,33 @@ static void __init omap3_check_features(void)
*/
}
+static void __init omap4_check_features(void)
+{
+ u32 si_type;
+
+ omap4_features = 0;
+
+ if (cpu_is_omap443x())
+ omap4_features |= OMAP4_HAS_MPU_1GHZ;
+
+
+ if (cpu_is_omap446x()) {
+ si_type =
+ read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1);
+ switch ((si_type & (3 << 16)) >> 16) {
+ case 2:
+ /* High performance device */
+ omap4_features |= OMAP4_HAS_MPU_1_5GHZ;
+ break;
+ case 1:
+ default:
+ /* Standard device */
+ omap4_features |= OMAP4_HAS_MPU_1_2GHZ;
+ break;
+ }
+ }
+}
+
static void __init ti816x_check_features(void)
{
omap3_features = OMAP3_HAS_NEON;
@@ -527,6 +555,7 @@ void __init omap2_check_revision(void)
return;
} else if (cpu_is_omap44xx()) {
omap4_check_revision();
+ omap4_check_features();
return;
} else {
pr_err("OMAP revision unknown, please fix!\n");
diff --git a/arch/arm/plat-omap/include/plat/cpu.h b/arch/arm/plat-omap/include/plat/cpu.h
index 86b1420..7e1ba5c 100644
--- a/arch/arm/plat-omap/include/plat/cpu.h
+++ b/arch/arm/plat-omap/include/plat/cpu.h
@@ -507,4 +507,23 @@ OMAP3_HAS_FEATURE(192mhz_clk, 192MHZ_CLK)
OMAP3_HAS_FEATURE(io_wakeup, IO_WAKEUP)
OMAP3_HAS_FEATURE(sdrc, SDRC)
+/*
+ * Runtime detection of OMAP4 features
+ */
+extern u32 omap4_features;
+
+#define OMAP4_HAS_MPU_1GHZ BIT(0)
+#define OMAP4_HAS_MPU_1_2GHZ BIT(1)
+#define OMAP4_HAS_MPU_1_5GHZ BIT(2)
+
+#define OMAP4_HAS_FEATURE(feat, flag) \
+static inline unsigned int omap4_has_ ##feat(void) \
+{ \
+ return omap4_features & OMAP4_HAS_ ##flag; \
+} \
+
+OMAP4_HAS_FEATURE(mpu_1ghz, MPU_1GHZ)
+OMAP4_HAS_FEATURE(mpu_1_2ghz, MPU_1_2GHZ)
+OMAP4_HAS_FEATURE(mpu_1_5ghz, MPU_1_5GHZ)
+
#endif
--
1.7.4.1
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