Added function to differentiate between the OMAP3EVM revisions. The
chip-id of the ethernet PHY is being used for this purpose.
Rev A to D : 0x01150000
Rev >= E : 0x92200000
Signed-off-by: Vaibhav Hiremath <hvaibhav@xxxxxx>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
Signed-off-by: Sanjeev Premi <premi@xxxxxx>
---
arch/arm/mach-omap2/board-omap3evm.c | 33 +++++++++++++++++++++++++++++++
arch/arm/plat-omap/include/plat/board.h | 18 ++++++++++++++++
2 files changed, 51 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index b9b0f4c..0595ce8 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -48,9 +48,40 @@
#define OMAP3EVM_ETHR_START 0x2c000000
#define OMAP3EVM_ETHR_SIZE 1024
+#define OMAP3EVM_ETHR_ID_REV 0x50
#define OMAP3EVM_ETHR_GPIO_IRQ 176
#define OMAP3EVM_SMC911X_CS 5
+static u8 omap3_evm_version;
+
+u8 get_omap3_evm_rev(void)
+{
+ return omap3_evm_version;
+}
+EXPORT_SYMBOL(get_omap3_evm_rev);
+
+static void __init omap3_evm_get_revision(void)
+{
+ void __iomem *ioaddr;
+ unsigned int smsc_id;
+
+ /* Ethernet PHY ID is stored at ID_REV register */
+ ioaddr = ioremap_nocache(OMAP3EVM_ETHR_START, SZ_1K);
+ smsc_id = readl(ioaddr + OMAP3EVM_ETHR_ID_REV) & 0xFFFF0000;
+ iounmap(ioaddr);
+
+ switch (smsc_id) {
+ /*SMSC9115 chipset*/
+ case 0x01150000:
+ omap3_evm_version = OMAP3EVM_BOARD_GEN_1;
+ break;
+ /*SMSC 9220 chipset*/
+ case 0x92200000:
+ default:
+ omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
+ }
+}
+
static struct resource omap3evm_smc911x_resources[] = {
[0] = {
.start = OMAP3EVM_ETHR_START,
@@ -357,6 +388,8 @@ static struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
static void __init omap3_evm_init(void)
{
+ omap3_evm_get_revision();
+
omap3_evm_i2c_init();
platform_add_devices(omap3_evm_devices, ARRAY_SIZE(omap3_evm_devices));
diff --git a/arch/arm/plat-omap/include/plat/board.h b/arch/arm/plat-omap/include/plat/board.h
index c4fc69f..abb17b6 100644
--- a/arch/arm/plat-omap/include/plat/board.h
+++ b/arch/arm/plat-omap/include/plat/board.h
@@ -14,6 +14,18 @@
#include <plat/gpio-switch.h>
+/*
+ * OMAP35x EVM revision
+ * Run time detection of EVM revision is done by reading Ethernet
+ * PHY ID -
+ * GEN_1 = 0x01150000
+ * GEN_2 = 0x92200000
+ */
+enum {
+ OMAP3EVM_BOARD_GEN_1 = 0, /* EVM Rev between A - D */
+ OMAP3EVM_BOARD_GEN_2, /* EVM Rev >= Rev E */
+};
+
/* Different peripheral ids */
#define OMAP_TAG_CLOCK 0x4f01
#define OMAP_TAG_LCD 0x4f05
@@ -157,4 +169,10 @@ extern int omap_board_config_size;
/* for TI reference platforms sharing the same debug card */
extern int debug_card_init(u32 addr, unsigned gpio);
+/* OMAP3EVM revision */
+#if defined(CONFIG_MACH_OMAP3EVM)
+u8 get_omap3_evm_rev(void);
+#else
+#define get_omap3_evm_rev() (-EINVAL)
+#endif
#endif
--
1.6.2.4
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