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From: Chunyan Zhang <zhang.lyra@gmail.com>
To: Stephen Boyd <sboyd@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>
Cc: linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, Orson Zhai <orsonzhai@gmail.com>,
	Baolin Wang <baolin.wang7@gmail.com>,
	Chunyan Zhang <zhang.lyra@gmail.com>,
	Chunyan Zhang <chunyan.zhang@unisoc.com>
Subject: [PATCH v3 6/7] clk: sprd: support to get regmap from parent node
Date: Fri, 10 Jan 2020 14:09:17 +0800
Message-ID: <20200110060918.18416-7-zhang.lyra@gmail.com> (raw)
In-Reply-To: <20200110060918.18416-1-zhang.lyra@gmail.com>

From: Chunyan Zhang <chunyan.zhang@unisoc.com>

Some SC9863a clock nodes would be the child of a syscon node, clocks can
use the regmap of syscon device directly for this kind of cases.

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
---
 drivers/clk/sprd/common.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c
index c0af4779892b..d620bbbcdfc8 100644
--- a/drivers/clk/sprd/common.c
+++ b/drivers/clk/sprd/common.c
@@ -40,7 +40,8 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
 			 const struct sprd_clk_desc *desc)
 {
 	void __iomem *base;
-	struct device_node *node = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
 	struct regmap *regmap;
 
 	if (of_find_property(node, "sprd,syscon", NULL)) {
@@ -49,6 +50,13 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
 			pr_err("%s: failed to get syscon regmap\n", __func__);
 			return PTR_ERR(regmap);
 		}
+	} else if (of_device_is_compatible(of_get_parent(dev->of_node),
+			   "syscon")) {
+		regmap = device_node_to_regmap(of_get_parent(dev->of_node));
+		if (IS_ERR(regmap)) {
+			dev_err(dev, "failed to get regmap from its parent.\n");
+			return PTR_ERR(regmap);
+		}
 	} else {
 		base = devm_platform_ioremap_resource(pdev, 0);
 		if (IS_ERR(base))
-- 
2.20.1


  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-10  6:09 [PATCH v3 0/7] Add clocks for Unisoc's SC9863A Chunyan Zhang
2020-01-10  6:09 ` [PATCH v3 1/7] clk: sprd: add gate for pll clocks Chunyan Zhang
2020-01-10  6:09 ` [PATCH v3 2/7] dt-bindings: clk: sprd: rename the common file name sprd.txt to SoC specific Chunyan Zhang
2020-01-10  6:09 ` [PATCH v3 3/7] dt-bindings: clk: sprd: add bindings for sc9863a clock controller Chunyan Zhang
2020-01-10  6:09 ` [PATCH v3 4/7] clk: sprd: Add dt-bindings include file for SC9863A Chunyan Zhang
2020-01-10  6:09 ` [PATCH v3 5/7] clk: sprd: Add macros for referencing parents without strings Chunyan Zhang
2020-01-10  6:09 ` Chunyan Zhang [this message]
2020-01-10  6:09 ` [PATCH v3 7/7] clk: sprd: add clocks support for SC9863A Chunyan Zhang

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