[PATCH v3 6/8] i2c-pnx.c: Use resources in platforms
From: Roland Stigge
Date: Wed Apr 04 2012 - 04:36:14 EST
As a precondition for device tree conversion, the platforms using i2c-pnx.c are
converted to using mem and irq resources instead of platform data.
Signed-off-by: Roland Stigge <stigge@xxxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
---
Applies to v3.4-rc1
arch/arm/mach-lpc32xx/common.c | 75 +++++++++++++++++++++++++----------------
arch/arm/mach-pnx4008/i2c.c | 64 +++++++++++++++++++++-------------
drivers/i2c/busses/i2c-pnx.c | 47 +++++++++++++------------
include/linux/i2c-pnx.h | 9 +---
4 files changed, 112 insertions(+), 83 deletions(-)
--- linux-2.6.orig/arch/arm/mach-lpc32xx/common.c
+++ linux-2.6/arch/arm/mach-lpc32xx/common.c
@@ -27,7 +27,6 @@
#include <asm/mach/map.h>
-#include <mach/i2c.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include "common.h"
@@ -53,46 +52,64 @@ struct platform_device lpc32xx_watchdog_
/*
* I2C busses
*/
-static struct i2c_pnx_data i2c0_data = {
- .name = I2C_CHIP_NAME "1",
- .base = LPC32XX_I2C1_BASE,
- .irq = IRQ_LPC32XX_I2C_1,
-};
-
-static struct i2c_pnx_data i2c1_data = {
- .name = I2C_CHIP_NAME "2",
- .base = LPC32XX_I2C2_BASE,
- .irq = IRQ_LPC32XX_I2C_2,
-};
-
-static struct i2c_pnx_data i2c2_data = {
- .name = "USB-I2C",
- .base = LPC32XX_OTG_I2C_BASE,
- .irq = IRQ_LPC32XX_USB_I2C,
+static struct resource i2c0_resources[] = {
+ [0] = {
+ .start = LPC32XX_I2C1_BASE,
+ .end = LPC32XX_I2C1_BASE + 0x100 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_LPC32XX_I2C_1,
+ .end = IRQ_LPC32XX_I2C_1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource i2c1_resources[] = {
+ [0] = {
+ .start = LPC32XX_I2C2_BASE,
+ .end = LPC32XX_I2C2_BASE + 0x100 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_LPC32XX_I2C_2,
+ .end = IRQ_LPC32XX_I2C_2,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource i2c2_resources[] = {
+ [0] = {
+ .start = LPC32XX_OTG_I2C_BASE,
+ .end = LPC32XX_OTG_I2C_BASE + 0x100 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = IRQ_LPC32XX_USB_I2C,
+ .end = IRQ_LPC32XX_USB_I2C,
+ .flags = IORESOURCE_IRQ,
+ },
};
struct platform_device lpc32xx_i2c0_device = {
- .name = "pnx-i2c",
+ .name = "pnx-i2c.0",
.id = 0,
- .dev = {
- .platform_data = &i2c0_data,
- },
+ .num_resources = ARRAY_SIZE(i2c0_resources),
+ .resource = i2c0_resources,
};
struct platform_device lpc32xx_i2c1_device = {
- .name = "pnx-i2c",
+ .name = "pnx-i2c.1",
.id = 1,
- .dev = {
- .platform_data = &i2c1_data,
- },
+ .num_resources = ARRAY_SIZE(i2c1_resources),
+ .resource = i2c1_resources,
};
struct platform_device lpc32xx_i2c2_device = {
- .name = "pnx-i2c",
+ .name = "pnx-i2c.2",
.id = 2,
- .dev = {
- .platform_data = &i2c2_data,
- },
+ .num_resources = ARRAY_SIZE(i2c2_resources),
+ .resource = i2c2_resources,
};
/* TSC (Touch Screen Controller) */
--- linux-2.6.orig/arch/arm/mach-pnx4008/i2c.c
+++ linux-2.6/arch/arm/mach-pnx4008/i2c.c
@@ -16,48 +16,62 @@
#include <linux/err.h>
#include <mach/platform.h>
#include <mach/irqs.h>
-#include <mach/i2c.h>
-static struct i2c_pnx_data i2c0_data = {
- .name = I2C_CHIP_NAME "0",
- .base = PNX4008_I2C1_BASE,
- .irq = I2C_1_INT,
+static struct resource i2c0_resources[] = {
+ {
+ .start = PNX4008_I2C1_BASE,
+ .end = PNX4008_I2C1_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = I2C_1_INT,
+ .end = I2C_1_INT,
+ .flags = IORESOURCE_IRQ,
+ },
};
-static struct i2c_pnx_data i2c1_data = {
- .name = I2C_CHIP_NAME "1",
- .base = PNX4008_I2C2_BASE,
- .irq = I2C_2_INT,
+static struct resource i2c1_resources[] = {
+ {
+ .start = PNX4008_I2C2_BASE,
+ .end = PNX4008_I2C2_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = I2C_2_INT,
+ .end = I2C_2_INT,
+ .flags = IORESOURCE_IRQ,
+ },
};
-static struct i2c_pnx_data i2c2_data = {
- .name = "USB-I2C",
- .base = (PNX4008_USB_CONFIG_BASE + 0x300),
- .irq = USB_I2C_INT,
+static struct resource i2c2_resources[] = {
+ {
+ .start = PNX4008_USB_CONFIG_BASE + 0x300,
+ .end = PNX4008_USB_CONFIG_BASE + 0x300 + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = USB_I2C_INT,
+ .end = USB_I2C_INT,
+ .flags = IORESOURCE_IRQ,
+ },
};
static struct platform_device i2c0_device = {
- .name = "pnx-i2c",
+ .name = "pnx-i2c.0",
.id = 0,
- .dev = {
- .platform_data = &i2c0_data,
- },
+ .resource = i2c0_resources,
+ .num_resources = ARRAY_SIZE(i2c0_resources),
};
static struct platform_device i2c1_device = {
- .name = "pnx-i2c",
+ .name = "pnx-i2c.1",
.id = 1,
- .dev = {
- .platform_data = &i2c1_data,
- },
+ .resource = i2c1_resources,
+ .num_resources = ARRAY_SIZE(i2c1_resources),
};
static struct platform_device i2c2_device = {
- .name = "pnx-i2c",
+ .name = "pnx-i2c.2",
.id = 2,
- .dev = {
- .platform_data = &i2c2_data,
- },
+ .resource = i2c2_resources,
+ .num_resources = ARRAY_SIZE(i2c2_resources),
};
static struct platform_device *devices[] __initdata = {
--- linux-2.6.orig/drivers/i2c/busses/i2c-pnx.c
+++ linux-2.6/drivers/i2c/busses/i2c-pnx.c
@@ -568,14 +568,7 @@ static int __devinit i2c_pnx_probe(struc
int ret = 0;
struct i2c_pnx_algo_data *alg_data;
unsigned long freq;
- struct i2c_pnx_data *i2c_pnx = pdev->dev.platform_data;
-
- if (!i2c_pnx || !i2c_pnx->name) {
- dev_err(&pdev->dev, "%s: no platform data supplied\n",
- __func__);
- ret = -EINVAL;
- goto out;
- }
+ struct resource *res;
alg_data = kzalloc(sizeof(*alg_data), GFP_KERNEL);
if (!alg_data) {
@@ -585,13 +578,10 @@ static int __devinit i2c_pnx_probe(struc
platform_set_drvdata(pdev, alg_data);
- strlcpy(alg_data->adapter.name, i2c_pnx->name,
- sizeof(alg_data->adapter.name));
alg_data->adapter.dev.parent = &pdev->dev;
alg_data->adapter.algo = &pnx_algorithm;
alg_data->adapter.algo_data = alg_data;
alg_data->adapter.nr = pdev->id;
- alg_data->i2c_pnx = i2c_pnx;
alg_data->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(alg_data->clk)) {
@@ -603,17 +593,27 @@ static int __devinit i2c_pnx_probe(struc
alg_data->mif.timer.function = i2c_pnx_timeout;
alg_data->mif.timer.data = (unsigned long)alg_data;
+ snprintf(alg_data->adapter.name, sizeof(alg_data->adapter.name),
+ "%s", pdev->name);
+
/* Register I/O resource */
- if (!request_mem_region(i2c_pnx->base, I2C_PNX_REGION_SIZE,
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Unable to get mem resource.\n");
+ ret = -EBUSY;
+ goto out_clkget;
+ }
+ if (!request_mem_region(res->start, I2C_PNX_REGION_SIZE,
pdev->name)) {
dev_err(&pdev->dev,
"I/O region 0x%08x for I2C already in use.\n",
- i2c_pnx->base);
+ res->start);
ret = -ENODEV;
goto out_clkget;
}
- alg_data->ioaddr = ioremap(i2c_pnx->base, I2C_PNX_REGION_SIZE);
+ alg_data->base = res->start;
+ alg_data->ioaddr = ioremap(res->start, I2C_PNX_REGION_SIZE);
if (!alg_data->ioaddr) {
dev_err(&pdev->dev, "Couldn't ioremap I2C I/O region\n");
ret = -ENOMEM;
@@ -650,7 +650,12 @@ static int __devinit i2c_pnx_probe(struc
}
init_completion(&alg_data->mif.complete);
- ret = request_irq(i2c_pnx->irq, i2c_pnx_interrupt,
+ alg_data->irq = platform_get_irq(pdev, 0);
+ if (alg_data->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get IRQ from platform resource\n");
+ goto out_irq;
+ }
+ ret = request_irq(alg_data->irq, i2c_pnx_interrupt,
0, pdev->name, alg_data);
if (ret)
goto out_clock;
@@ -663,38 +668,36 @@ static int __devinit i2c_pnx_probe(struc
}
dev_dbg(&pdev->dev, "%s: Master at %#8x, irq %d.\n",
- alg_data->adapter.name, i2c_pnx->base, i2c_pnx->irq);
+ alg_data->adapter.name, res->start, alg_data->irq);
return 0;
out_irq:
- free_irq(i2c_pnx->irq, alg_data);
+ free_irq(alg_data->irq, alg_data);
out_clock:
clk_disable(alg_data->clk);
out_unmap:
iounmap(alg_data->ioaddr);
out_release:
- release_mem_region(i2c_pnx->base, I2C_PNX_REGION_SIZE);
+ release_mem_region(res->start, I2C_PNX_REGION_SIZE);
out_clkget:
clk_put(alg_data->clk);
out_drvdata:
kfree(alg_data);
err_kzalloc:
platform_set_drvdata(pdev, NULL);
-out:
return ret;
}
static int __devexit i2c_pnx_remove(struct platform_device *pdev)
{
struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
- struct i2c_pnx_data *i2c_pnx = alg_data->i2c_pnx;
- free_irq(i2c_pnx->irq, alg_data);
+ free_irq(alg_data->irq, alg_data);
i2c_del_adapter(&alg_data->adapter);
clk_disable(alg_data->clk);
iounmap(alg_data->ioaddr);
- release_mem_region(i2c_pnx->base, I2C_PNX_REGION_SIZE);
+ release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE);
clk_put(alg_data->clk);
kfree(alg_data);
platform_set_drvdata(pdev, NULL);
--- linux-2.6.orig/include/linux/i2c-pnx.h
+++ linux-2.6/include/linux/i2c-pnx.h
@@ -29,14 +29,9 @@ struct i2c_pnx_algo_data {
struct i2c_pnx_mif mif;
int last;
struct clk *clk;
- struct i2c_pnx_data *i2c_pnx;
struct i2c_adapter adapter;
-};
-
-struct i2c_pnx_data {
- const char *name;
- u32 base;
- int irq;
+ phys_addr_t base;
+ int irq;
};
#endif /* __I2C_PNX_H__ */
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