linux-kernel - [PATCH 02/12] mfd: flexcard: add flexcard misc mfd-cell

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Message-Id: <1481674313-30378-3-git-send-email-dengler@linutronix.de>
Date:   Wed, 14 Dec 2016 01:11:43 +0100
From:   Holger Dengler <dengler@...utronix.de>
To:     Lee Jones <lee.jones@...aro.org>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vinod Koul <vinod.koul@...el.com>
Cc:     linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Siewior <bigeasy@...utronix.de>,
        Juergen Bubeck <bubeck@...ug.com>,
        Peter Mahler <mahler@...ug.com>,
        Holger Dengler <dengler@...utronix.de>,
        Benedikt Spranger <b.spranger@...utronix.de>
Subject: [PATCH 02/12] mfd: flexcard: add flexcard misc mfd-cell

The Flexcard PCI BAR0 contain registers for configuration and
informational purpose. Add an appropriate MFD-cell for these registers.

Signed-off-by: Benedikt Spranger <b.spranger@...utronix.de>
Signed-off-by: Holger Dengler <dengler@...utronix.de>
cc: Lee Jones <lee.jones@...aro.org>
---
 drivers/mfd/flexcard_core.c  | 58 +++++++++++++++++++++++++++++++++++++++++++-
 include/linux/mfd/flexcard.h |  1 +
 2 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/flexcard_core.c b/drivers/mfd/flexcard_core.c
index e580971..2ee9089 100644
--- a/drivers/mfd/flexcard_core.c
+++ b/drivers/mfd/flexcard_core.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/ioport.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
@@ -25,11 +26,48 @@
 #define FLEXCARD_FR_OFFSET	0x4000
 #define FLEXCARD_FR_SIZE	0x2000
 
+#define FLEXCARD_CONF_START	0x000
+#define FLEXCARD_CONF_SIZE	0x13F
+#define FLEXCARD_NF_START	0x170
+#define FLEXCARD_NF_SIZE	0x7
+
+static DEFINE_IDA(flexcard_ida);
+
+static struct resource flexcard_misc_res[] = {
+	DEFINE_RES_MEM_NAMED(FLEXCARD_CONF_START,
+			     FLEXCARD_CONF_SIZE,
+			     "flexcard-conf"),
+	DEFINE_RES_MEM_NAMED(FLEXCARD_NF_START,
+			     FLEXCARD_NF_SIZE,
+			     "flexcard-nf"),
+};
+
+static struct mfd_cell flexcard_misc_dev[] = {
+	{
+		.name = "flexcard-misc",
+		.num_resources = ARRAY_SIZE(flexcard_misc_res),
+		.resources = flexcard_misc_res,
+	},
+};
+
 enum flexcard_cell_id {
 	FLEXCARD_CELL_CAN,
 	FLEXCARD_CELL_FLEXRAY,
 };
 
+static int flexcard_misc_setup(struct flexcard_device *priv)
+{
+	struct pci_dev *pdev = priv->pdev;
+
+	flexcard_misc_dev[0].id = priv->cardnr;
+	flexcard_misc_res[0].parent = &pdev->resource[0];
+	flexcard_misc_res[1].parent = &pdev->resource[0];
+
+	return mfd_add_devices(&pdev->dev, 0, flexcard_misc_dev,
+			       ARRAY_SIZE(flexcard_misc_dev),
+			       &pdev->resource[0], 0, NULL);
+}
+
 static int flexcard_tiny_can(struct flexcard_device *priv,
 			     int idx, int id, u32 offset)
 {
@@ -163,10 +201,23 @@ static int flexcard_probe(struct pci_dev *pdev,
 	fw_ver.reg = readl(&priv->bar0->conf.fc_fw_ver);
 	hw_ver.reg = readl(&priv->bar0->conf.fc_hw_ver);
 
+	ret = ida_simple_get(&flexcard_ida, 0, 0, GFP_KERNEL);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "could not get new Flexcard id:%d\n", ret);
+		goto out_unmap;
+	}
+	priv->cardnr = ret;
+
 	ret = flexcard_tiny_probe(priv);
 	if (ret) {
 		dev_err(&pdev->dev, "unable to probe tinys: %d", ret);
-		goto out_unmap;
+		goto out_ida;
+	}
+
+	ret = flexcard_misc_setup(priv);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to probe tinys: %d", ret);
+		goto out_mfd_dev_remove;
 	}
 
 	dev_info(&pdev->dev, "HW %02x.%02x.%02x FW %02x.%02x.%02x\n",
@@ -175,6 +226,10 @@ static int flexcard_probe(struct pci_dev *pdev,
 
 	return 0;
 
+out_mfd_dev_remove:
+	mfd_remove_devices(&pdev->dev);
+out_ida:
+	ida_simple_remove(&flexcard_ida, priv->cardnr);
 out_unmap:
 	iounmap(priv->bar0);
 out_release:
@@ -190,6 +245,7 @@ static void flexcard_remove(struct pci_dev *pdev)
 	struct flexcard_device *priv = pci_get_drvdata(pdev);
 
 	mfd_remove_devices(&pdev->dev);
+	ida_simple_remove(&flexcard_ida, priv->cardnr);
 	iounmap(priv->bar0);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
diff --git a/include/linux/mfd/flexcard.h b/include/linux/mfd/flexcard.h
index 362b909..4116305 100644
--- a/include/linux/mfd/flexcard.h
+++ b/include/linux/mfd/flexcard.h
@@ -94,6 +94,7 @@ struct fc_bar0 {
 } __packed;
 
 struct flexcard_device {
+	unsigned int cardnr;
 	struct pci_dev *pdev;
 	struct fc_bar0 __iomem *bar0;
 	struct mfd_cell *cells;
-- 
2.1.4