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Subject[PATCH] soc: renesas: Add support for reading product revision for RZ/G2L family
Date
From: Biju Das <biju.das.jz@bp.renesas.com>

As per RZ/G2L HW manual (Rev.1.00 Sep, 2021) DEV_ID [31:28] indicates
product revision. Use this information to populate the revision info
for RZ/G2L family.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Hi,

Below is the log from Renesas RZ/G2L SMARC EVK:

root@smarc-rzg2l:~#
at /sys/devices/soc0/$i; donemachine family soc_id revision; do echo -n "$i: ";ca
machine: Renesas SMARC EVK based on r9a07g044l2
family: RZ/G2L
soc_id: r9a07g044
revision: Rev 1
root@smarc-rzg2l:~#

Cheers,
Prabhakar
---
drivers/soc/renesas/renesas-soc.c | 31 +++++++++++++++++--------------
1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c
index 8f82749f182f..6ecd2763d100 100644
--- a/drivers/soc/renesas/renesas-soc.c
+++ b/drivers/soc/renesas/renesas-soc.c
@@ -416,6 +416,17 @@ static int __init renesas_soc_init(void)
chipid = ioremap(family->reg, 4);
}

+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return -ENOMEM;
+
+ np = of_find_node_by_path("/");
+ of_property_read_string(np, "model", &soc_dev_attr->machine);
+ of_node_put(np);
+
+ soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
+ soc_dev_attr->soc_id = kstrdup_const(soc_id, GFP_KERNEL);
+
if (chipid) {
product = readl(chipid + id->offset);
iounmap(chipid);
@@ -430,6 +441,12 @@ static int __init renesas_soc_init(void)

eshi = ((product >> 4) & 0x0f) + 1;
eslo = product & 0xf;
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u",
+ eshi, eslo);
+ } else if (id == &id_rzg2l) {
+ eshi = ((product >> 28) & 0x0f);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "Rev %u",
+ eshi);
}

if (soc->id &&
@@ -439,20 +456,6 @@ static int __init renesas_soc_init(void)
}
}

- soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
- if (!soc_dev_attr)
- return -ENOMEM;
-
- np = of_find_node_by_path("/");
- of_property_read_string(np, "model", &soc_dev_attr->machine);
- of_node_put(np);
-
- soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
- soc_dev_attr->soc_id = kstrdup_const(soc_id, GFP_KERNEL);
- if (eshi)
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi,
- eslo);
-
pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");

--
2.17.1
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