linux-kernel - [PATCH v2] clk: davinci: remove platform data struct

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241217174154.84441-1-brgl@bgdev.pl>
Date: Tue, 17 Dec 2024 18:41:54 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: David Lechner <david@...hnology.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v2] clk: davinci: remove platform data struct

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

There are no board files using struct davinci_pll_platform_data anymore.
The structure itself is currently used to store a single pointer. Let's
remove the struct definition, the header and rework the driver to not
require the syscon regmap to be stored in probe().

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
Changes in v2:
- fix using an uninitialized pointer
- lookup syscon uncoditionally to avoid an OF node check

 drivers/clk/davinci/pll.c                     | 32 ++-----------------
 include/linux/platform_data/clk-davinci-pll.h | 21 ------------
 2 files changed, 3 insertions(+), 50 deletions(-)
 delete mode 100644 include/linux/platform_data/clk-davinci-pll.h

diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c
index 5bbbb3a66477..82727b1fc67a 100644
--- a/drivers/clk/davinci/pll.c
+++ b/drivers/clk/davinci/pll.c
@@ -19,7 +19,6 @@
 #include <linux/mfd/syscon.h>
 #include <linux/notifier.h>
 #include <linux/of.h>
-#include <linux/platform_data/clk-davinci-pll.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 #include <linux/regmap.h>
@@ -840,27 +839,6 @@ int of_davinci_pll_init(struct device *dev, struct device_node *node,
 	return 0;
 }
 
-static struct davinci_pll_platform_data *davinci_pll_get_pdata(struct device *dev)
-{
-	struct davinci_pll_platform_data *pdata = dev_get_platdata(dev);
-
-	/*
-	 * Platform data is optional, so allocate a new struct if one was not
-	 * provided. For device tree, this will always be the case.
-	 */
-	if (!pdata)
-		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return NULL;
-
-	/* for device tree, we need to fill in the struct */
-	if (dev->of_node)
-		pdata->cfgchip =
-			syscon_regmap_lookup_by_compatible("ti,da830-cfgchip");
-
-	return pdata;
-}
-
 /* needed in early boot for clocksource/clockevent */
 #ifdef CONFIG_ARCH_DAVINCI_DA850
 CLK_OF_DECLARE(da850_pll0, "ti,da850-pll0", of_da850_pll0_init);
@@ -890,8 +868,8 @@ typedef int (*davinci_pll_init)(struct device *dev, void __iomem *base,
 static int davinci_pll_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct davinci_pll_platform_data *pdata;
 	davinci_pll_init pll_init = NULL;
+	struct regmap *cfgchip;
 	void __iomem *base;
 
 	pll_init = device_get_match_data(dev);
@@ -903,17 +881,13 @@ static int davinci_pll_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	pdata = davinci_pll_get_pdata(dev);
-	if (!pdata) {
-		dev_err(dev, "missing platform data\n");
-		return -EINVAL;
-	}
+	cfgchip = syscon_regmap_lookup_by_compatible("ti,da830-cfgchip");
 
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	return pll_init(dev, base, pdata->cfgchip);
+	return pll_init(dev, base, cfgchip);
 }
 
 static struct platform_driver davinci_pll_driver = {
diff --git a/include/linux/platform_data/clk-davinci-pll.h b/include/linux/platform_data/clk-davinci-pll.h
deleted file mode 100644
index e55dab1d578b..000000000000
--- a/include/linux/platform_data/clk-davinci-pll.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * PLL clock driver for TI Davinci SoCs
- *
- * Copyright (C) 2018 David Lechner <david@...hnology.com>
- */
-
-#ifndef __LINUX_PLATFORM_DATA_CLK_DAVINCI_PLL_H__
-#define __LINUX_PLATFORM_DATA_CLK_DAVINCI_PLL_H__
-
-#include <linux/regmap.h>
-
-/**
- * davinci_pll_platform_data
- * @cfgchip: CFGCHIP syscon regmap
- */
-struct davinci_pll_platform_data {
-	struct regmap *cfgchip;
-};
-
-#endif /* __LINUX_PLATFORM_DATA_CLK_DAVINCI_PLL_H__ */
-- 
2.45.2