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From: Abel Vesa <abel.vesa@linaro.org>
Date: Wed, 14 Feb 2024 23:13:48 +0200
Subject: [PATCH RFC v3 3/4] spmi: pmic-arb: Make core resources acquiring a
 version operation
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Message-Id: <20240214-spmi-multi-master-support-v3-3-0bae0ef04faf@linaro.org>
References: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org>
In-Reply-To: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org>
To: Stephen Boyd <sboyd@kernel.org>, 
 Matthias Brugger <matthias.bgg@gmail.com>, 
 Bjorn Andersson <andersson@kernel.org>, 
 Konrad Dybcio <konrad.dybcio@linaro.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>, 
 Neil Armstrong <neil.armstrong@linaro.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Srini Kandagatla <srinivas.kandagatla@linaro.org>, 
 Johan Hovold <johan@kernel.org>, linux-kernel@vger.kernel.org, 
 linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, 
 linux-mediatek@lists.infradead.org, Abel Vesa <abel.vesa@linaro.org>

Rather than setting up the core, obsrv and chnls in probe by using
version specific conditionals, add a dedicated "get_core_resources"
version specific op and move the acquiring in there.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/spmi/spmi-pmic-arb.c | 111 ++++++++++++++++++++++++++++++-------------
 1 file changed, 78 insertions(+), 33 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 23939c0d225f..489556467a4c 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -203,6 +203,7 @@ struct spmi_pmic_arb {
  */
 struct pmic_arb_ver_ops {
 	const char *ver_str;
+	int (*get_core_resources)(struct platform_device *pdev, void __iomem *core);
 	int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index);
 	int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
 	/* spmi commands (read_cmd, write_cmd, cmd) functionality */
@@ -956,6 +957,19 @@ static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
 	return 0;
 }
 
+static int pmic_arb_get_core_resources_v1(struct platform_device *pdev,
+					  void __iomem *core)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	pmic_arb->wr_base = core;
+	pmic_arb->rd_base = core;
+
+	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+
+	return 0;
+}
+
 static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index)
 {
 	u32 *mapping_table;
@@ -1063,6 +1077,41 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 	return apid;
 }
 
+static int pmic_arb_get_obsrvr_chnls_v2(struct platform_device *pdev)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "obsrvr");
+	pmic_arb->rd_base = devm_ioremap(dev, res->start,
+					 resource_size(res));
+	if (IS_ERR(pmic_arb->rd_base))
+		return PTR_ERR(pmic_arb->rd_base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+					   "chnls");
+	pmic_arb->wr_base = devm_ioremap(dev, res->start,
+					 resource_size(res));
+	if (IS_ERR(pmic_arb->wr_base))
+		return PTR_ERR(pmic_arb->wr_base);
+
+	return 0;
+}
+
+static int pmic_arb_get_core_resources_v2(struct platform_device *pdev,
+					  void __iomem *core)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	pmic_arb->core = core;
+
+	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+
+	return pmic_arb_get_obsrvr_chnls_v2(pdev);
+}
+
 static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid)
 {
 	u16 apid_valid;
@@ -1246,6 +1295,18 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
 	return offset;
 }
 
+static int pmic_arb_get_core_resources_v7(struct platform_device *pdev,
+					  void __iomem *core)
+{
+	struct spmi_pmic_arb *pmic_arb = platform_get_drvdata(pdev);
+
+	pmic_arb->core = core;
+
+	pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
+
+	return pmic_arb_get_obsrvr_chnls_v2(pdev);
+}
+
 /*
  * Only v7 supports 2 bus buses. Each bus will get a different apid count,
  * read from different registers.
@@ -1469,6 +1530,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)
 
 static const struct pmic_arb_ver_ops pmic_arb_v1 = {
 	.ver_str		= "v1",
+	.get_core_resources	= pmic_arb_get_core_resources_v1,
 	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v1,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v1,
@@ -1484,6 +1546,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v2 = {
 	.ver_str		= "v2",
+	.get_core_resources	= pmic_arb_get_core_resources_v2,
 	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v2,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1499,6 +1562,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v3 = {
 	.ver_str		= "v3",
+	.get_core_resources	= pmic_arb_get_core_resources_v2,
 	.init_apid		= pmic_arb_init_apid_v1,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v2,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1514,6 +1578,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v5 = {
 	.ver_str		= "v5",
+	.get_core_resources	= pmic_arb_get_core_resources_v2,
 	.init_apid		= pmic_arb_init_apid_v5,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v5,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1529,6 +1594,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = {
 
 static const struct pmic_arb_ver_ops pmic_arb_v7 = {
 	.ver_str		= "v7",
+	.get_core_resources	= pmic_arb_get_core_resources_v7,
 	.init_apid		= pmic_arb_init_apid_v7,
 	.ppid_to_apid		= pmic_arb_ppid_to_apid_v5,
 	.non_data_cmd		= pmic_arb_non_data_cmd_v2,
@@ -1584,44 +1650,23 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 
 	hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
 
-	if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
+	if (hw_ver < PMIC_ARB_VERSION_V2_MIN)
 		pmic_arb->ver_ops = &pmic_arb_v1;
-		pmic_arb->wr_base = core;
-		pmic_arb->rd_base = core;
-	} else {
-		pmic_arb->core = core;
-
-		if (hw_ver < PMIC_ARB_VERSION_V3_MIN)
-			pmic_arb->ver_ops = &pmic_arb_v2;
-		else if (hw_ver < PMIC_ARB_VERSION_V5_MIN)
-			pmic_arb->ver_ops = &pmic_arb_v3;
-		else if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
-			pmic_arb->ver_ops = &pmic_arb_v5;
-		else
-			pmic_arb->ver_ops = &pmic_arb_v7;
-
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   "obsrvr");
-		pmic_arb->rd_base = devm_ioremap(&ctrl->dev, res->start,
-						 resource_size(res));
-		if (IS_ERR(pmic_arb->rd_base))
-			return PTR_ERR(pmic_arb->rd_base);
-
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   "chnls");
-		pmic_arb->wr_base = devm_ioremap(&ctrl->dev, res->start,
-						 resource_size(res));
-		if (IS_ERR(pmic_arb->wr_base))
-			return PTR_ERR(pmic_arb->wr_base);
-	}
+	else if (hw_ver < PMIC_ARB_VERSION_V3_MIN)
+		pmic_arb->ver_ops = &pmic_arb_v2;
+	else if (hw_ver < PMIC_ARB_VERSION_V5_MIN)
+		pmic_arb->ver_ops = &pmic_arb_v3;
+	else if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
+		pmic_arb->ver_ops = &pmic_arb_v5;
+	else
+		pmic_arb->ver_ops = &pmic_arb_v7;
 
 	dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
 		 pmic_arb->ver_ops->ver_str, hw_ver);
 
-	if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
-		pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
-	else
-		pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
+	err = pmic_arb->ver_ops->get_core_resources(pdev, core);
+	if (err)
+		return err;
 
 	err = pmic_arb->ver_ops->init_apid(pmic_arb, 0);
 	if (err)

-- 
2.34.1