[PATCH] ARM: imx: imx7ulp: Add a comment explaining the B2 silicon version

[Fabio Estevam]

To help the users to understand the meaning of bits 31-28 of the
JTAG_ID_REG register, add a comment explaining the value that is
expected from a i.MX7ULP rev B2.

Signed-off-by: Fabio Estevam <festevam at gmail.com>
---
 arch/arm/mach-imx/mach-imx7ulp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-imx/mach-imx7ulp.c b/arch/arm/mach-imx/mach-imx7ulp.c
index f6032ea7de8b..a3c8dadec1c5 100644
--- a/arch/arm/mach-imx/mach-imx7ulp.c
+++ b/arch/arm/mach-imx/mach-imx7ulp.c
@@ -37,6 +37,7 @@ static void __init imx7ulp_set_revision(void)
 	 * bit[31:28] of JTAG_ID register defines revision as below from B0:
 	 * 0001        B0
 	 * 0010        B1
+	 * 0011        B2
 	 */
 	switch (revision >> 28) {
 	case 1:
-- 
2.17.1