linux-kernel - [PATCH v3] soc: qcom: ocmem: Add OCMEM hardware version print

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Date:   Mon, 29 May 2023 10:41:15 +0200
From:   Luca Weiss <luca@...tu.xyz>
To:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Brian Masney <masneyb@...tation.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luca Weiss <luca@...tu.xyz>
Subject: [PATCH v3] soc: qcom: ocmem: Add OCMEM hardware version print

It might be useful to know what hardware version of the OCMEM block the
SoC contains. Add a debug print for that.

Signed-off-by: Luca Weiss <luca@...tu.xyz>
---
This patch is depends on [0] but could also be applied in the other
order, if conflicts are resolved.

[0] https://lore.kernel.org/linux-arm-msm/20230506-msm8226-ocmem-v1-1-3e24e2724f01@z3ntu.xyz/
---
Changes in v3:
- Use %lu instead of %ld for print (Konrad)
- Re-wrap lines so reading is easier (Konrad)
- Link to v2: https://lore.kernel.org/r/20230509-ocmem-hwver-v2-1-8c8793a07dfc@z3ntu.xyz

Changes in v2:
- Use FIELD_GET macros for getting correct bits from register (take
  wording from mdp5: major, minor, step which hopefully is sort of
  accurate)
- Link to v1: https://lore.kernel.org/r/20230509-ocmem-hwver-v1-1-b83ece3f2168@z3ntu.xyz
---
 drivers/soc/qcom/ocmem.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/soc/qcom/ocmem.c b/drivers/soc/qcom/ocmem.c
index c3e78411c637..ef7c1748242a 100644
--- a/drivers/soc/qcom/ocmem.c
+++ b/drivers/soc/qcom/ocmem.c
@@ -76,6 +76,10 @@ struct ocmem {
 #define OCMEM_REG_GFX_MPU_START			0x00001004
 #define OCMEM_REG_GFX_MPU_END			0x00001008
 
+#define OCMEM_HW_VERSION_MAJOR(val)		FIELD_GET(GENMASK(31, 28), val)
+#define OCMEM_HW_VERSION_MINOR(val)		FIELD_GET(GENMASK(27, 16), val)
+#define OCMEM_HW_VERSION_STEP(val)		FIELD_GET(GENMASK(15, 0), val)
+
 #define OCMEM_HW_PROFILE_NUM_PORTS(val)		FIELD_GET(0x0000000f, (val))
 #define OCMEM_HW_PROFILE_NUM_MACROS(val)	FIELD_GET(0x00003f00, (val))
 
@@ -355,6 +359,12 @@ static int ocmem_dev_probe(struct platform_device *pdev)
 		}
 	}
 
+	reg = ocmem_read(ocmem, OCMEM_REG_HW_VERSION);
+	dev_dbg(dev, "OCMEM hardware version: %lu.%lu.%lu\n",
+		OCMEM_HW_VERSION_MAJOR(reg),
+		OCMEM_HW_VERSION_MINOR(reg),
+		OCMEM_HW_VERSION_STEP(reg));
+
 	reg = ocmem_read(ocmem, OCMEM_REG_HW_PROFILE);
 	ocmem->num_ports = OCMEM_HW_PROFILE_NUM_PORTS(reg);
 	ocmem->num_macros = OCMEM_HW_PROFILE_NUM_MACROS(reg);

---
base-commit: 8705151771af822ac794b44504cd72eebc423499
change-id: 20230509-ocmem-hwver-99bcb33b028b

Best regards,
-- 
Luca Weiss <luca@...tu.xyz>