diff mbox series

[v2,3/4] soc: qcom: llcc-qcom: Extract major hardware version

Message ID 20201130093924.45057-4-manivannan.sadhasivam@linaro.org
State New
Headers show
Series Add LLCC support for SM8250 SoC | expand

Commit Message

Manivannan Sadhasivam Nov. 30, 2020, 9:39 a.m. UTC 
From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>


The major hardware version of the LLCC IP is encoded in its
LLCC_COMMON_HW_INFO register. Extract the version and cache it in the
driver data so that it can be used to implement version specific
functionality like enabling Write sub cache for given SCID.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>

[mani: splitted the version extract as a single patch and few cleanups]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

---
 drivers/soc/qcom/llcc-qcom.c       | 12 ++++++++++++
 include/linux/soc/qcom/llcc-qcom.h |  2 ++
 2 files changed, 14 insertions(+)

-- 
2.25.1
diff mbox series

Patch

diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
index 16b421608e9c..a559617ea7c0 100644
--- a/drivers/soc/qcom/llcc-qcom.c
+++ b/drivers/soc/qcom/llcc-qcom.c
@@ -4,6 +4,7 @@ 
  *
  */
 
+#include <linux/bitfield.h>
 #include <linux/bitmap.h>
 #include <linux/bitops.h>
 #include <linux/device.h>
@@ -35,6 +36,9 @@ 
 
 #define CACHE_LINE_SIZE_SHIFT         6
 
+#define LLCC_COMMON_HW_INFO           0x00030000
+#define LLCC_MAJOR_VERSION_MASK       GENMASK(31, 24)
+
 #define LLCC_COMMON_STATUS0           0x0003000c
 #define LLCC_LB_CNT_MASK              GENMASK(31, 28)
 #define LLCC_LB_CNT_SHIFT             28
@@ -476,6 +480,7 @@  static int qcom_llcc_probe(struct platform_device *pdev)
 	const struct qcom_llcc_config *cfg;
 	const struct llcc_slice_config *llcc_cfg;
 	u32 sz;
+	u32 version;
 
 	drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
 	if (!drv_data) {
@@ -496,6 +501,13 @@  static int qcom_llcc_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	/* Extract major version of the IP */
+	ret = regmap_read(drv_data->bcast_regmap, LLCC_COMMON_HW_INFO, &version);
+	if (ret)
+		goto err;
+
+	drv_data->major_version = FIELD_GET(LLCC_MAJOR_VERSION_MASK, version);
+
 	ret = regmap_read(drv_data->regmap, LLCC_COMMON_STATUS0,
 						&num_banks);
 	if (ret)
diff --git a/include/linux/soc/qcom/llcc-qcom.h b/include/linux/soc/qcom/llcc-qcom.h
index 3db6797ba6ff..d17a3de80510 100644
--- a/include/linux/soc/qcom/llcc-qcom.h
+++ b/include/linux/soc/qcom/llcc-qcom.h
@@ -79,6 +79,7 @@  struct llcc_edac_reg_data {
  * @bitmap: Bit map to track the active slice ids
  * @offsets: Pointer to the bank offsets array
  * @ecc_irq: interrupt for llcc cache error detection and reporting
+ * @major_version: Indicates the LLCC major version
  */
 struct llcc_drv_data {
 	struct regmap *regmap;
@@ -91,6 +92,7 @@  struct llcc_drv_data {
 	unsigned long *bitmap;
 	u32 *offsets;
 	int ecc_irq;
+	u32 major_version;
 };
 
 #if IS_ENABLED(CONFIG_QCOM_LLCC)