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-prev] [thread-next>] [day] [month] [year] [list]
Date:	Tue, 28 Jan 2014 01:39:27 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 15/21] pinctrl: mvebu: dove: request additional resources

Dove pinctrl also requires additional registers to control all pins.
This patch requests resources for mpp4 and pmu-mpp register ranges.
As this changes DT to driver requirements, fallback to hardcoded
resources, if the corresponding DT regs have not been set.
Also, WARN about old DT binding usage to encourage users to update
their DTBs.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
---
Changelog:
v1->v2:
- add FW_BUG to WARN message

Cc: Jason Cooper <jason@...edaemon.net>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Gregory Clement <gregory.clement@...e-electrons.com>
Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/pinctrl/mvebu/pinctrl-dove.c | 39 +++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-dove.c b/drivers/pinctrl/mvebu/pinctrl-dove.c
index 98f8cae72ace..bb7ff396ddd1 100644
--- a/drivers/pinctrl/mvebu/pinctrl-dove.c
+++ b/drivers/pinctrl/mvebu/pinctrl-dove.c
@@ -22,6 +22,11 @@
 
 #include "pinctrl-mvebu.h"
 
+/* Internal registers can be configured at any 1 MiB aligned address */
+#define INT_REGS_MASK			~(SZ_1M - 1)
+#define MPP4_REGS_OFFS			0xd0440
+#define PMU_REGS_OFFS			0xd802c
+
 #define DOVE_SB_REGS_VIRT_BASE		IOMEM(0xfde00000)
 #define DOVE_MPP_VIRT_BASE		(DOVE_SB_REGS_VIRT_BASE + 0xd0200)
 #define DOVE_PMU_MPP_GENERAL_CTRL	(DOVE_MPP_VIRT_BASE + 0x10)
@@ -56,6 +61,8 @@
 #define CONFIG_PMU	BIT(4)
 
 static void __iomem *mpp_base;
+static void __iomem *mpp4_base;
+static void __iomem *pmu_base;
 
 static int dove_mpp_ctrl_get(struct mvebu_mpp_ctrl *ctrl,
 			     unsigned long *config)
@@ -802,13 +809,43 @@ static int dove_pinctrl_probe(struct platform_device *pdev)
 {
 	const struct of_device_id *match =
 		of_match_device(dove_pinctrl_of_match, &pdev->dev);
-	struct resource *mpp_res;
+	struct resource *mpp_res, *res;
+	struct resource res_fallback;
 
 	mpp_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	mpp_base = devm_ioremap_resource(&pdev->dev, mpp_res);
 	if (IS_ERR(mpp_base))
 		return PTR_ERR(mpp_base);
 
+	/* prepare fallback resource */
+	memcpy(&res_fallback, mpp_res, sizeof(struct resource));
+	res_fallback.start = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!res) {
+		dev_warn(&pdev->dev, "falling back to hardcoded MPP4 resource\n");
+		adjust_resource(&res_fallback,
+			(mpp_res->start & INT_REGS_MASK) + MPP4_REGS_OFFS, 0x4);
+		res = &res_fallback;
+	}
+	mpp4_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(mpp4_base))
+		return PTR_ERR(mpp4_base);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	if (!res) {
+		dev_warn(&pdev->dev, "falling back to hardcoded PMU resource\n");
+		adjust_resource(&res_fallback,
+			(mpp_res->start & INT_REGS_MASK) + PMU_REGS_OFFS, 0x8);
+		res = &res_fallback;
+	}
+	pmu_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pmu_base))
+		return PTR_ERR(pmu_base);
+
+	/* Warn on any missing DT resource */
+	WARN(res_fallback.start, FW_BUG "Missing pinctrl regs in DTB. Please update your firmware.\n");
+
 	pdev->dev.platform_data = (void *)match->data;
 
 	/*
-- 
1.8.5.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists