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Date: Sat, 23 Oct 2010 00:41:02 -0700
From: Andres Salomon <dilinger@...ued.net>
To: Samuel Ortiz <sameo@...ux.intel.com>
Cc: linux-geode@...ts.infradead.org, linux-kernel@...r.kernel.org,
akpm@...ux-foundation.org, cjb@...top.org, dsd@...top.org
Subject: [PATCH 1/4] MFD: add cs5535-mfd driver for CS5535/CS5536 support
Add an MFD driver to handle the ISA device on CS5535 and CS5536 southbridges.
This ISA bridge is actually multiple devices; GPIOs, MFGPTs, etc.
Signed-off-by: Andres Salomon <dilinger@...ued.net>
---
drivers/mfd/Kconfig | 8 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/cs5535-mfd.c | 151 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 160 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/cs5535-mfd.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index db51ea1..b72627b 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -495,6 +495,14 @@ config AB3550_CORE
LEDs, vibrator, system power and temperature, power management
and ALSA sound.
+config MFD_CS5535
+ tristate "Support for CS5535 and CS5536 southbridge core functions"
+ select MFD_CORE
+ depends on PCI
+ ---help---
+ This is the core driver for CS5535/CS5536 MFD functions. This is
+ necessary for using the board's GPIO and MFGPT functionality.
+
config MFD_TIMBERDALE
tristate "Support for the Timberdale FPGA"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index feaeeae..3d1b41a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_AB3100_CORE) += ab3100-core.o
obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o
obj-$(CONFIG_AB3550_CORE) += ab3550-core.o
obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-spi.o
+obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
obj-$(CONFIG_LPC_SCH) += lpc_sch.o
diff --git a/drivers/mfd/cs5535-mfd.c b/drivers/mfd/cs5535-mfd.c
new file mode 100644
index 0000000..b141ca7
--- /dev/null
+++ b/drivers/mfd/cs5535-mfd.c
@@ -0,0 +1,151 @@
+/*
+ * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
+ *
+ * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is
+ * used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has
+ * an IO range that's specified in a single BAR. The BAR order is
+ * hardcoded in the CS553x specifications.
+ *
+ * Copyright (c) 2010 Andres Salomon <dilinger@...ued.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#define DRV_NAME "cs5535-mfd"
+
+enum cs5535_mfd_bars {
+ SMB_BAR = 0,
+ GPIO_BAR = 1,
+ MFGPT_BAR = 2,
+ PMS_BAR = 4,
+ ACPI_BAR = 5,
+ NR_BARS,
+};
+
+static __devinitdata struct resource cs5535_mfd_resources[NR_BARS];
+
+static __devinitdata struct mfd_cell cs5535_mfd_cells[] = {
+ {
+ .id = SMB_BAR,
+ .name = "cs5535-smb",
+ .num_resources = 1,
+ .resources = &cs5535_mfd_resources[SMB_BAR],
+ },
+ {
+ .id = GPIO_BAR,
+ .name = "cs5535-gpio",
+ .num_resources = 1,
+ .resources = &cs5535_mfd_resources[GPIO_BAR],
+ },
+ {
+ .id = MFGPT_BAR,
+ .name = "cs5535-mfgpt",
+ .num_resources = 1,
+ .resources = &cs5535_mfd_resources[MFGPT_BAR],
+ },
+ {
+ .id = PMS_BAR,
+ .name = "cs5535-pms",
+ .num_resources = 1,
+ .resources = &cs5535_mfd_resources[PMS_BAR],
+ },
+ {
+ .id = ACPI_BAR,
+ .name = "cs5535-acpi",
+ .num_resources = 1,
+ .resources = &cs5535_mfd_resources[ACPI_BAR],
+ },
+};
+
+static int __devinit cs5535_mfd_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ int err, i;
+
+ err = pci_enable_device(pdev);
+ if (err)
+ return err;
+
+ /* fill in IO range for each cell; subdrivers handle the region */
+ for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
+ int bar = cs5535_mfd_cells[i].id;
+ struct resource *r = &cs5535_mfd_resources[bar];
+
+ r->flags = IORESOURCE_IO;
+ r->start = pci_resource_start(pdev, bar);
+ r->end = pci_resource_end(pdev, bar);
+
+ /* id is used for temporarily storing BAR; unset it now */
+ cs5535_mfd_cells[i].id = 0;
+ }
+
+ err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
+ ARRAY_SIZE(cs5535_mfd_cells), NULL, 0);
+ if (err) {
+ dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
+ goto err_disable;
+ }
+
+ dev_info(&pdev->dev, "%d devices registered.\n",
+ ARRAY_SIZE(cs5535_mfd_cells));
+
+ return 0;
+
+err_disable:
+ pci_disable_device(pdev);
+ return err;
+}
+
+static void __devexit cs5535_mfd_remove(struct pci_dev *pdev)
+{
+ mfd_remove_devices(&pdev->dev);
+ pci_disable_device(pdev);
+}
+
+static struct pci_device_id cs5535_mfd_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
+
+static struct pci_driver cs5535_mfd_drv = {
+ .name = DRV_NAME,
+ .id_table = cs5535_mfd_pci_tbl,
+ .probe = cs5535_mfd_probe,
+ .remove = __devexit_p(cs5535_mfd_remove),
+};
+
+static int __init cs5535_mfd_init(void)
+{
+ return pci_register_driver(&cs5535_mfd_drv);
+}
+
+static void __exit cs5535_mfd_exit(void)
+{
+ pci_unregister_driver(&cs5535_mfd_drv);
+}
+
+module_init(cs5535_mfd_init);
+module_exit(cs5535_mfd_exit);
+
+MODULE_AUTHOR("Andres Salomon <dilinger@...ued.net>");
+MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
+MODULE_LICENSE("GPL");
--
1.7.1
--
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