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soc: Add information to identify the J742S2 SoC family

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J742S2 has the same part number as J784S4 but JTAG_DEVICE_ID has a
PKG bit that tells about J742S2.

Add support for reading JTAG_DEVICE_ID and set family as J742S2 based
on that.

Link: https://www.ti.com/lit/pdf/spruje3 (TRM)
Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
This commit is contained in:
Manorit Chawdhry 2025-03-17 10:24:23 +05:30 committed by Tom Rini
parent 61b6b2fcc9
commit 201b08702e
2 changed files with 20 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-k3/include/mach/hardware.h
View File

@ -62,6 +62,12 @@
#define JTAG_ID_PARTNO_J722S 0xbba0
#define JTAG_ID_PARTNO_J784S4 0xbb80
#define CTRLMMR_WKUP_JTAG_DEVICE_ID (WKUP_CTRL_MMR0_BASE + 0x18)
#define JTAG_DEV_J742S2_PKG_MASK GENMASK(2, 0)
#define JTAG_DEV_J742S2_PKG_SHIFT 0
#define JTAG_ID_PKG_J742S2 0x7
#define K3_SOC_ID(id, ID) \
static inline bool soc_is_##id(void) \
{ \

16
drivers/soc/soc_ti_k3.c
View File

@ -18,8 +18,12 @@ struct soc_ti_k3_plat {
static const char *get_family_string(u32 idreg)
{
const char *family;
u32 jtag_dev_id;
u32 pkg;
u32 soc;
jtag_dev_id = readl(CTRLMMR_WKUP_JTAG_DEVICE_ID);
soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
switch (soc) {
@ -51,8 +55,16 @@ static const char *get_family_string(u32 idreg)
family = "J722S";
break;
case JTAG_ID_PARTNO_J784S4:
family = "J784S4";
break;
{
/* Keep default family as J784S4 */
family = "J784S4";
pkg = (jtag_dev_id & JTAG_DEV_J742S2_PKG_MASK) >> JTAG_DEV_J742S2_PKG_SHIFT;
if (pkg == JTAG_ID_PKG_J742S2)
family = "J742S2";
break;
}
default:
family = "Unknown Silicon";
};