linux-kernel - [PATCH v9 3/6] remoteproc: pru: Add enum for PRU Core Indentifiers.

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Date:   Fri, 18 Nov 2022 16:49:21 +0530
From:   MD Danish Anwar <danishanwar@...com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Suman Anna <s-anna@...com>, Roger Quadros <rogerq@...nel.org>,
        "Andrew F . Davis" <afd@...com>, <nm@...com>, <vigneshr@...com>,
        <srk@...com>, <linux-remoteproc@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        MD Danish Anwar <danishanwar@...com>
Subject: [PATCH v9 3/6] remoteproc: pru: Add enum for PRU Core Indentifiers.

Introducing enum pruss_pru_id for PRU Core Identifiers.
PRUSS_PRU0 indicates PRU Core 0.
PRUSS_PRU1 indicates PRU Core 1.
PRUSS_NUM_PRUS indicates the total number of PRU Cores.

Signed-off-by: MD Danish Anwar <danishanwar@...com>
---
 drivers/remoteproc/pru_rproc.c | 6 +++---
 include/linux/pruss.h          | 9 +++++++++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index 4769ade9c316..7d4ed39b3772 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -564,7 +564,7 @@ static void *pru_d_da_to_va(struct pru_rproc *pru, u32 da, size_t len)
 	dram0 = pruss->mem_regions[PRUSS_MEM_DRAM0];
 	dram1 = pruss->mem_regions[PRUSS_MEM_DRAM1];
 	/* PRU1 has its local RAM addresses reversed */
-	if (pru->id == 1)
+	if (pru->id == PRUSS_PRU1)
 		swap(dram0, dram1);
 	shrd_ram = pruss->mem_regions[PRUSS_MEM_SHRD_RAM2];
 
@@ -873,14 +873,14 @@ static int pru_rproc_set_id(struct pru_rproc *pru)
 	case RTU0_IRAM_ADDR_MASK:
 		fallthrough;
 	case PRU0_IRAM_ADDR_MASK:
-		pru->id = 0;
+		pru->id = PRUSS_PRU0;
 		break;
 	case TX_PRU1_IRAM_ADDR_MASK:
 		fallthrough;
 	case RTU1_IRAM_ADDR_MASK:
 		fallthrough;
 	case PRU1_IRAM_ADDR_MASK:
-		pru->id = 1;
+		pru->id = PRUSS_PRU1;
 		break;
 	default:
 		ret = -EINVAL;
diff --git a/include/linux/pruss.h b/include/linux/pruss.h
index 4909226f14a9..fdc719b43db0 100644
--- a/include/linux/pruss.h
+++ b/include/linux/pruss.h
@@ -14,6 +14,15 @@
 
 #define PRU_RPROC_DRVNAME "pru-rproc"
 
+/*
+ * enum pruss_pru_id - PRU core identifiers
+ */
+enum pruss_pru_id {
+	PRUSS_PRU0 = 0,
+	PRUSS_PRU1,
+	PRUSS_NUM_PRUS,
+};
+
 struct device_node;
 
 #if IS_ENABLED(CONFIG_PRU_REMOTEPROC)
-- 
2.25.1