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Message-Id: <1299267744-17278-10-git-send-email-ddaney@caviumnetworks.com>
Date: Fri, 4 Mar 2011 11:42:21 -0800
From: David Daney <ddaney@...iumnetworks.com>
To: linux-mips@...ux-mips.org, ralf@...ux-mips.org,
devicetree-discuss@...ts.ozlabs.org, grant.likely@...retlab.ca,
linux-kernel@...r.kernel.org
Cc: David Daney <ddaney@...iumnetworks.com>,
"Jean Delvare (PC drivers, core)" <khali@...ux-fr.org>,
"Ben Dooks (embedded platforms)" <ben-linux@...ff.org>,
linux-i2c@...r.kernel.org
Subject: [RFC PATCH v2 09/12] i2c: Convert i2c-octeon.c to use device tree.
Signed-off-by: David Daney <ddaney@...iumnetworks.com>
Cc: "Jean Delvare (PC drivers, core)" <khali@...ux-fr.org>
Cc: "Ben Dooks (embedded platforms)" <ben-linux@...ff.org>
Cc: linux-i2c@...r.kernel.org
---
arch/mips/cavium-octeon/octeon-platform.c | 84 -----------------------------
arch/mips/include/asm/octeon/octeon.h | 5 --
drivers/i2c/busses/i2c-octeon.c | 69 ++++++++++++++----------
3 files changed, 41 insertions(+), 117 deletions(-)
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index 87512c5..0533351 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -168,90 +168,6 @@ out:
}
device_initcall(octeon_rng_device_init);
-static struct i2c_board_info __initdata octeon_i2c_devices[] = {
- {
- I2C_BOARD_INFO("ds1337", 0x68),
- },
-};
-
-static int __init octeon_i2c_devices_init(void)
-{
- return i2c_register_board_info(0, octeon_i2c_devices,
- ARRAY_SIZE(octeon_i2c_devices));
-}
-arch_initcall(octeon_i2c_devices_init);
-
-#define OCTEON_I2C_IO_BASE 0x1180000001000ull
-#define OCTEON_I2C_IO_UNIT_OFFSET 0x200
-
-static struct octeon_i2c_data octeon_i2c_data[2];
-
-static int __init octeon_i2c_device_init(void)
-{
- struct platform_device *pd;
- int ret = 0;
- int port, num_ports;
-
- struct resource i2c_resources[] = {
- {
- .flags = IORESOURCE_MEM,
- }, {
- .flags = IORESOURCE_IRQ,
- }
- };
-
- if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX))
- num_ports = 2;
- else
- num_ports = 1;
-
- for (port = 0; port < num_ports; port++) {
- octeon_i2c_data[port].sys_freq = octeon_get_io_clock_rate();
- /*FIXME: should be examined. At the moment is set for 100Khz */
- octeon_i2c_data[port].i2c_freq = 100000;
-
- pd = platform_device_alloc("i2c-octeon", port);
- if (!pd) {
- ret = -ENOMEM;
- goto out;
- }
-
- pd->dev.platform_data = octeon_i2c_data + port;
-
- i2c_resources[0].start =
- OCTEON_I2C_IO_BASE + (port * OCTEON_I2C_IO_UNIT_OFFSET);
- i2c_resources[0].end = i2c_resources[0].start + 0x1f;
- switch (port) {
- case 0:
- i2c_resources[1].start = OCTEON_IRQ_TWSI;
- i2c_resources[1].end = OCTEON_IRQ_TWSI;
- break;
- case 1:
- i2c_resources[1].start = OCTEON_IRQ_TWSI2;
- i2c_resources[1].end = OCTEON_IRQ_TWSI2;
- break;
- default:
- BUG();
- }
-
- ret = platform_device_add_resources(pd,
- i2c_resources,
- ARRAY_SIZE(i2c_resources));
- if (ret)
- goto fail;
-
- ret = platform_device_add(pd);
- if (ret)
- goto fail;
- }
- return ret;
-fail:
- platform_device_put(pd);
-out:
- return ret;
-}
-device_initcall(octeon_i2c_device_init);
-
/* Octeon SMI/MDIO interface. */
static int __init octeon_mdiobus_device_init(void)
{
diff --git a/arch/mips/include/asm/octeon/octeon.h b/arch/mips/include/asm/octeon/octeon.h
index f72f768..1e2486e 100644
--- a/arch/mips/include/asm/octeon/octeon.h
+++ b/arch/mips/include/asm/octeon/octeon.h
@@ -215,11 +215,6 @@ struct octeon_cf_data {
int dma_engine; /* -1 for no DMA */
};
-struct octeon_i2c_data {
- unsigned int sys_freq;
- unsigned int i2c_freq;
-};
-
extern void octeon_write_lcd(const char *s);
extern void octeon_check_cpu_bist(void);
extern int octeon_get_boot_debug_flag(void);
diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c
index 56dbe54..cb34725 100644
--- a/drivers/i2c/busses/i2c-octeon.c
+++ b/drivers/i2c/busses/i2c-octeon.c
@@ -2,7 +2,7 @@
* (C) Copyright 2009-2010
* Nokia Siemens Networks, michael.lawnick.ext@....com
*
- * Portions Copyright (C) 2010 Cavium Networks, Inc.
+ * Portions Copyright (C) 2010, 2011 Cavium Networks, Inc.
*
* This is a driver for the i2c adapter in Cavium Networks' OCTEON processors.
*
@@ -11,17 +11,18 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of_i2c.h>
+#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/init.h>
-
-#include <linux/io.h>
#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/of.h>
#include <asm/octeon/octeon.h>
@@ -121,10 +122,8 @@ static u8 octeon_i2c_read_sw(struct octeon_i2c *i2c, u64 eop_reg)
*/
static void octeon_i2c_write_int(struct octeon_i2c *i2c, u64 data)
{
- u64 tmp;
-
__raw_writeq(data, i2c->twsi_base + TWSI_INT);
- tmp = __raw_readq(i2c->twsi_base + TWSI_INT);
+ __raw_readq(i2c->twsi_base + TWSI_INT);
}
/**
@@ -515,22 +514,22 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev)
{
int irq, result = 0;
struct octeon_i2c *i2c;
- struct octeon_i2c_data *i2c_data;
struct resource *res_mem;
+ const __be32 *data;
+ int len;
/* All adaptors have an irq. */
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
- i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
+ i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
if (!i2c) {
dev_err(&pdev->dev, "kzalloc failed\n");
result = -ENOMEM;
goto out;
}
i2c->dev = &pdev->dev;
- i2c_data = pdev->dev.platform_data;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -539,19 +538,22 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev)
result = -ENXIO;
goto fail_region;
}
+ i2c->twsi_phys = res_mem->start;
+ i2c->regsize = resource_size(res_mem);
- if (i2c_data == NULL) {
- dev_err(i2c->dev, "no I2C frequency data\n");
+ data = of_get_property(pdev->dev.of_node, "clock-rate", &len);
+ if (data && len == sizeof(*data)) {
+ i2c->twsi_freq = be32_to_cpup(data);
+ } else {
+ dev_err(i2c->dev, "no I2C 'clock-rate' property\n");
result = -ENXIO;
goto fail_region;
}
- i2c->twsi_phys = res_mem->start;
- i2c->regsize = resource_size(res_mem);
- i2c->twsi_freq = i2c_data->i2c_freq;
- i2c->sys_freq = i2c_data->sys_freq;
+ i2c->sys_freq = octeon_get_io_clock_rate();
- if (!request_mem_region(i2c->twsi_phys, i2c->regsize, res_mem->name)) {
+ if (!devm_request_mem_region(&pdev->dev, i2c->twsi_phys, i2c->regsize,
+ res_mem->name)) {
dev_err(i2c->dev, "request_mem_region failed\n");
goto fail_region;
}
@@ -581,28 +583,31 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev)
i2c->adap = octeon_i2c_ops;
i2c->adap.dev.parent = &pdev->dev;
- i2c->adap.nr = pdev->id >= 0 ? pdev->id : 0;
+ i2c->adap.dev.of_node = pdev->dev.of_node;
i2c_set_adapdata(&i2c->adap, i2c);
platform_set_drvdata(pdev, i2c);
- result = i2c_add_numbered_adapter(&i2c->adap);
+ result = i2c_add_adapter(&i2c->adap);
if (result < 0) {
dev_err(i2c->dev, "failed to add adapter\n");
goto fail_add;
}
-
dev_info(i2c->dev, "version %s\n", DRV_VERSION);
- return result;
+ of_i2c_register_devices(&i2c->adap);
+
+ return 0;
fail_add:
platform_set_drvdata(pdev, NULL);
free_irq(i2c->irq, i2c);
fail_irq:
iounmap(i2c->twsi_base);
- release_mem_region(i2c->twsi_phys, i2c->regsize);
+
+ devm_release_mem_region(&pdev->dev, i2c->twsi_phys, i2c->regsize);
fail_region:
- kfree(i2c);
+
+ devm_kfree(&pdev->dev, i2c);
out:
return result;
};
@@ -615,17 +620,26 @@ static int __devexit octeon_i2c_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
free_irq(i2c->irq, i2c);
iounmap(i2c->twsi_base);
- release_mem_region(i2c->twsi_phys, i2c->regsize);
- kfree(i2c);
+ devm_release_mem_region(&pdev->dev, i2c->twsi_phys, i2c->regsize);
+ devm_kfree(&pdev->dev, i2c);
return 0;
};
+static struct of_device_id octeon_i2c_match[] = {
+ {
+ .compatible = "cavium,octeon-3860-twsi",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, octeon_i2c_match);
+
static struct platform_driver octeon_i2c_driver = {
.probe = octeon_i2c_probe,
.remove = __devexit_p(octeon_i2c_remove),
.driver = {
.owner = THIS_MODULE,
.name = DRV_NAME,
+ .of_match_table = octeon_i2c_match,
},
};
@@ -646,7 +660,6 @@ MODULE_AUTHOR("Michael Lawnick <michael.lawnick.ext@....com>");
MODULE_DESCRIPTION("I2C-Bus adapter for Cavium OCTEON processors");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
-MODULE_ALIAS("platform:" DRV_NAME);
module_init(octeon_i2c_init);
module_exit(octeon_i2c_exit);
--
1.7.2.3
--
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