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Message-ID: <1328627513-30134-3-git-send-email-prakash.pm@ti.com>
Date: Tue, 7 Feb 2012 20:41:52 +0530
From: "Manjunathappa, Prakash" <prakash.pm@...com>
To: <linux-arm-kernel@...ts.infradead.org>,
<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: Sekhar Nori <nsekhar@...com>,
<davinci-linux-open-source@...ux.davincidsp.com>,
Russell King <linux@....linux.org.uk>,
David Woodhouse <dwmw2@...radead.org>,
Samuel Ortiz <sameo@...ux.intel.com>,
"Manjunathappa, Prakash" <prakash.pm@...com>
Subject: [PATCH v3 2/3] arm:davinci: Move emif driver to drivers/mfd from mach-davinci folder
Move aemif kernel module from arch/arm/mach-davinci/ to multi functional
devices frame work. "davinci_aemif" MFD driver adds "davinci_nand" and
"physmap-flash" slave devices.
Signed-off-by: Manjunathappa, Prakash <prakash.pm@...com>
---
Since v2:
Modified emif MFD driver to load multiple instance of NAND/NOR devices.
Since v1:
Patch generated using -M option.
arch/arm/Kconfig | 1 +
arch/arm/mach-davinci/Makefile | 2 +-
drivers/mfd/Makefile | 1 +
.../aemif.c => drivers/mfd/davinci_aemif.c | 75 +++++++++++++++++++-
include/linux/mfd/davinci_aemif.h | 14 ++++
5 files changed, 91 insertions(+), 2 deletions(-)
rename arch/arm/mach-davinci/aemif.c => drivers/mfd/davinci_aemif.c (66%)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a48aecc..09dcb94 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -934,6 +934,7 @@ config ARCH_DAVINCI
select GENERIC_ALLOCATOR
select GENERIC_IRQ_CHIP
select ARCH_HAS_HOLES_MEMORYMODEL
+ select MFD_CORE
help
Support for TI's DaVinci platform.
diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index 2db78bd..8bab47c 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/arch/arm/mach-davinci/Makefile
@@ -5,7 +5,7 @@
# Common objects
obj-y := time.o clock.o serial.o psc.o \
- dma.o usb.o common.o sram.o aemif.o
+ dma.o usb.o common.o sram.o
obj-$(CONFIG_DAVINCI_MUX) += mux.o
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index b953bab..54fc267 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o
+obj-${CONFIG_ARCH_DAVINCI} += davinci_aemif.o
obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
obj-$(CONFIG_MFD_TI_SSP) += ti-ssp.o
diff --git a/arch/arm/mach-davinci/aemif.c b/drivers/mfd/davinci_aemif.c
similarity index 66%
rename from arch/arm/mach-davinci/aemif.c
rename to drivers/mfd/davinci_aemif.c
index b67c115..5fb490d 100644
--- a/arch/arm/mach-davinci/aemif.c
+++ b/drivers/mfd/davinci_aemif.c
@@ -14,8 +14,13 @@
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/time.h>
-
#include <linux/mfd/davinci_aemif.h>
+#include <linux/mtd/physmap.h>
+#include <linux/slab.h>
+#include <mach/nand.h>
+
+static char *name[] = {"davinci_nand", "physmap-flash",};
+#define MAX ARRAY_SIZE(name)
/* Timing value configuration */
@@ -131,3 +136,71 @@ int davinci_aemif_setup_timing(struct davinci_aemif_timing *t,
return 0;
}
EXPORT_SYMBOL(davinci_aemif_setup_timing);
+
+static int __init davinci_aemif_probe(struct platform_device *pdev)
+{
+ struct davinci_aemif_devices *davinci_aemif_devices =
+ pdev->dev.platform_data;
+ struct platform_device *devices;
+ struct mfd_cell *cells;
+ int ret, i, j, count;
+
+ devices = davinci_aemif_devices->devices;
+
+ cells = kzalloc(sizeof(struct mfd_cell) *
+ davinci_aemif_devices->num_devices, GFP_KERNEL);
+
+ for (j = 0, count = 0; j < MAX; j++) {
+ for (i = 0; i < davinci_aemif_devices->num_devices; i++) {
+ if (strcmp(devices[i].name, name[j]))
+ continue;
+ cells[count].name = name[j];
+ cells[count].platform_data =
+ devices[i].dev.platform_data;
+ cells[count].pdata_size =
+ sizeof(struct davinci_nand_pdata);
+ cells[count].id = devices[i].id;
+ cells[count].resources = devices[i].resource;
+ cells[count].num_resources = devices[i].num_resources;
+ count++;
+ }
+ }
+
+ ret = mfd_add_devices(&pdev->dev, 0, cells,
+ count, NULL, 0);
+ if (ret != 0)
+ dev_err(&pdev->dev, "fail to register client devices\n");
+
+ return 0;
+}
+
+static int __devexit davinci_aemif_remove(struct platform_device *pdev)
+{
+ mfd_remove_devices(&pdev->dev);
+ return 0;
+}
+
+static struct platform_driver davinci_aemif_driver = {
+ .driver = {
+ .name = "davinci_aemif",
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(davinci_aemif_remove),
+};
+
+static int __init davinci_aemif_init(void)
+{
+ return platform_driver_probe(&davinci_aemif_driver,
+ davinci_aemif_probe);
+}
+module_init(davinci_aemif_init);
+
+static void __exit davinci_aemif_exit(void)
+{
+ platform_driver_unregister(&davinci_aemif_driver);
+}
+module_exit(davinci_aemif_exit);
+
+MODULE_AUTHOR("Prakash Manjunathappa");
+MODULE_DESCRIPTION("Texas Instruments AEMIF Interface");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/davinci_aemif.h b/include/linux/mfd/davinci_aemif.h
index 05b2934..18650c3 100644
--- a/include/linux/mfd/davinci_aemif.h
+++ b/include/linux/mfd/davinci_aemif.h
@@ -10,6 +10,10 @@
#ifndef _MACH_DAVINCI_AEMIF_H
#define _MACH_DAVINCI_AEMIF_H
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+
#define NRCSR_OFFSET 0x00
#define AWCCR_OFFSET 0x04
#define A1CR_OFFSET 0x10
@@ -18,6 +22,16 @@
#define ACR_EW_MASK BIT(30)
#define ACR_SS_MASK BIT(31)
+enum davinci_emif_cells {
+ DAVINCI_NAND_DEVICE_CELL,
+ DAVINCI_NOR_FLASH_CELL,
+};
+
+struct davinci_aemif_devices {
+ struct platform_device *devices;
+ unsigned int num_devices;
+};
+
/* All timings in nanoseconds */
struct davinci_aemif_timing {
u8 wsetup;
--
1.7.1
--
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