mirror of https://gitee.com/openkylin/linux.git
powerpc/i2c: Convert i2c-mpc into an of_platform driver
Convert i2c-mpc to an of_platform driver. Utilize the code in drivers/of-i2c.c to make i2c modules dynamically loadable by the device tree. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Jon Smirl
Grant Likely
parent
6eb9d32298
commit
0d1cde2358
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@ -414,139 +414,6 @@ static int __init gfar_of_init(void)
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arch_initcall(gfar_of_init);
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#ifdef CONFIG_I2C_BOARDINFO
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#include <linux/i2c.h>
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struct i2c_driver_device {
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char *of_device;
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char *i2c_type;
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};
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static struct i2c_driver_device i2c_devices[] __initdata = {
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{"ricoh,rs5c372a", "rs5c372a"},
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{"ricoh,rs5c372b", "rs5c372b"},
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{"ricoh,rv5c386", "rv5c386"},
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{"ricoh,rv5c387a", "rv5c387a"},
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{"dallas,ds1307", "ds1307"},
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{"dallas,ds1337", "ds1337"},
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{"dallas,ds1338", "ds1338"},
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{"dallas,ds1339", "ds1339"},
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{"dallas,ds1340", "ds1340"},
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{"stm,m41t00", "m41t00"},
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{"dallas,ds1374", "ds1374"},
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{"cirrus,cs4270", "cs4270"},
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};
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static int __init of_find_i2c_driver(struct device_node *node,
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struct i2c_board_info *info)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
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if (!of_device_is_compatible(node, i2c_devices[i].of_device))
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continue;
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if (strlcpy(info->type, i2c_devices[i].i2c_type,
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I2C_NAME_SIZE) >= I2C_NAME_SIZE)
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return -ENOMEM;
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return 0;
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}
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pr_warning("fsl_soc.c: unrecognized i2c node %s\n",
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(const char *) of_get_property(node, "compatible", NULL));
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return -ENODEV;
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}
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static void __init of_register_i2c_devices(struct device_node *adap_node,
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int bus_num)
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{
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struct device_node *node = NULL;
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while ((node = of_get_next_child(adap_node, node))) {
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struct i2c_board_info info = {};
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const u32 *addr;
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int len;
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addr = of_get_property(node, "reg", &len);
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if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) {
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printk(KERN_WARNING "fsl_soc.c: invalid i2c device entry\n");
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continue;
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}
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info.irq = irq_of_parse_and_map(node, 0);
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if (info.irq == NO_IRQ)
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info.irq = -1;
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if (of_find_i2c_driver(node, &info) < 0)
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continue;
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info.addr = *addr;
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i2c_register_board_info(bus_num, &info, 1);
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}
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}
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static int __init fsl_i2c_of_init(void)
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{
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struct device_node *np;
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unsigned int i = 0;
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struct platform_device *i2c_dev;
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int ret;
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for_each_compatible_node(np, NULL, "fsl-i2c") {
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struct resource r[2];
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struct fsl_i2c_platform_data i2c_data;
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const unsigned char *flags = NULL;
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int idx;
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const u32 *iprop;
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memset(&r, 0, sizeof(r));
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memset(&i2c_data, 0, sizeof(i2c_data));
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ret = of_address_to_resource(np, 0, &r[0]);
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if (ret)
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goto err;
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of_irq_to_resource(np, 0, &r[1]);
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iprop = of_get_property(np, "cell-index", NULL);
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idx = iprop ? *iprop : i;
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i2c_dev = platform_device_register_simple("fsl-i2c", idx, r, 2);
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if (IS_ERR(i2c_dev)) {
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ret = PTR_ERR(i2c_dev);
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goto err;
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}
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i2c_data.device_flags = 0;
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flags = of_get_property(np, "dfsrr", NULL);
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if (flags)
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i2c_data.device_flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
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flags = of_get_property(np, "fsl5200-clocking", NULL);
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if (flags)
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i2c_data.device_flags |= FSL_I2C_DEV_CLOCK_5200;
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ret =
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platform_device_add_data(i2c_dev, &i2c_data,
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sizeof(struct
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fsl_i2c_platform_data));
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if (ret)
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goto unreg;
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of_register_i2c_devices(np, idx);
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i++;
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}
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return 0;
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unreg:
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platform_device_unregister(i2c_dev);
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err:
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return ret;
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}
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arch_initcall(fsl_i2c_of_init);
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#endif
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#ifdef CONFIG_PPC_83xx
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static int __init mpc83xx_wdt_init(void)
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@ -17,7 +17,8 @@
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/of_platform.h>
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#include <linux/of_i2c.h>
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#include <asm/io.h>
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#include <linux/fsl_devices.h>
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@ -25,13 +26,13 @@
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#define MPC_I2C_ADDR 0x00
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#define DRV_NAME "mpc-i2c"
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#define MPC_I2C_FDR 0x04
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#define MPC_I2C_CR 0x08
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#define MPC_I2C_SR 0x0c
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#define MPC_I2C_DR 0x10
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#define MPC_I2C_DFSRR 0x14
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#define MPC_I2C_REGION 0x20
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#define CCR_MEN 0x80
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#define CCR_MIEN 0x40
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@ -315,102 +316,117 @@ static struct i2c_adapter mpc_ops = {
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.timeout = 1,
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};
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static int fsl_i2c_probe(struct platform_device *pdev)
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static int __devinit fsl_i2c_probe(struct of_device *op, const struct of_device_id *match)
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{
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int result = 0;
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struct mpc_i2c *i2c;
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struct fsl_i2c_platform_data *pdata;
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struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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pdata = (struct fsl_i2c_platform_data *) pdev->dev.platform_data;
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i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
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if (!i2c)
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return -ENOMEM;
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i2c->irq = platform_get_irq(pdev, 0);
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if (i2c->irq < 0)
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i2c->irq = NO_IRQ; /* Use polling */
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if (of_get_property(op->node, "dfsrr", NULL))
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i2c->flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
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if (of_device_is_compatible(op->node, "fsl,mpc5200-i2c") ||
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of_device_is_compatible(op->node, "mpc5200-i2c"))
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i2c->flags |= FSL_I2C_DEV_CLOCK_5200;
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i2c->flags = pdata->device_flags;
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init_waitqueue_head(&i2c->queue);
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i2c->base = ioremap((phys_addr_t)r->start, MPC_I2C_REGION);
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i2c->base = of_iomap(op->node, 0);
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if (!i2c->base) {
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printk(KERN_ERR "i2c-mpc - failed to map controller\n");
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result = -ENOMEM;
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goto fail_map;
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}
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if (i2c->irq != NO_IRQ)
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if ((result = request_irq(i2c->irq, mpc_i2c_isr,
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IRQF_SHARED, "i2c-mpc", i2c)) < 0) {
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printk(KERN_ERR
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"i2c-mpc - failed to attach interrupt\n");
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goto fail_irq;
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i2c->irq = irq_of_parse_and_map(op->node, 0);
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if (i2c->irq != NO_IRQ) { /* i2c->irq = NO_IRQ implies polling */
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result = request_irq(i2c->irq, mpc_i2c_isr,
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IRQF_SHARED, "i2c-mpc", i2c);
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if (result < 0) {
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printk(KERN_ERR "i2c-mpc - failed to attach interrupt\n");
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goto fail_request;
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}
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}
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mpc_i2c_setclock(i2c);
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platform_set_drvdata(pdev, i2c);
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dev_set_drvdata(&op->dev, i2c);
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i2c->adap = mpc_ops;
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i2c->adap.nr = pdev->id;
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i2c_set_adapdata(&i2c->adap, i2c);
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i2c->adap.dev.parent = &pdev->dev;
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if ((result = i2c_add_numbered_adapter(&i2c->adap)) < 0) {
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i2c->adap.dev.parent = &op->dev;
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result = i2c_add_adapter(&i2c->adap);
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if (result < 0) {
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printk(KERN_ERR "i2c-mpc - failed to add adapter\n");
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goto fail_add;
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}
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of_register_i2c_devices(&i2c->adap, op->node);
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return result;
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fail_add:
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if (i2c->irq != NO_IRQ)
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free_irq(i2c->irq, i2c);
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fail_irq:
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iounmap(i2c->base);
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fail_map:
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fail_add:
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dev_set_drvdata(&op->dev, NULL);
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free_irq(i2c->irq, i2c);
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fail_request:
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irq_dispose_mapping(i2c->irq);
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iounmap(i2c->base);
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fail_map:
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kfree(i2c);
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return result;
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};
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static int fsl_i2c_remove(struct platform_device *pdev)
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static int __devexit fsl_i2c_remove(struct of_device *op)
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{
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struct mpc_i2c *i2c = platform_get_drvdata(pdev);
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struct mpc_i2c *i2c = dev_get_drvdata(&op->dev);
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i2c_del_adapter(&i2c->adap);
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platform_set_drvdata(pdev, NULL);
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dev_set_drvdata(&op->dev, NULL);
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if (i2c->irq != NO_IRQ)
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free_irq(i2c->irq, i2c);
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irq_dispose_mapping(i2c->irq);
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iounmap(i2c->base);
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kfree(i2c);
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return 0;
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};
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/* work with hotplug and coldplug */
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MODULE_ALIAS("platform:fsl-i2c");
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static const struct of_device_id mpc_i2c_of_match[] = {
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{.compatible = "fsl-i2c",},
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{},
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};
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MODULE_DEVICE_TABLE(of, mpc_i2c_of_match);
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/* Structure for a device driver */
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static struct platform_driver fsl_i2c_driver = {
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.probe = fsl_i2c_probe,
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.remove = fsl_i2c_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "fsl-i2c",
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static struct of_platform_driver mpc_i2c_driver = {
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.match_table = mpc_i2c_of_match,
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.probe = fsl_i2c_probe,
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.remove = __devexit_p(fsl_i2c_remove),
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.driver = {
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.owner = THIS_MODULE,
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.name = DRV_NAME,
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},
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};
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static int __init fsl_i2c_init(void)
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{
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return platform_driver_register(&fsl_i2c_driver);
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int rv;
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rv = of_register_platform_driver(&mpc_i2c_driver);
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if (rv)
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printk(KERN_ERR DRV_NAME
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" of_register_platform_driver failed (%i)\n", rv);
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return rv;
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}
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static void __exit fsl_i2c_exit(void)
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{
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platform_driver_unregister(&fsl_i2c_driver);
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of_unregister_platform_driver(&mpc_i2c_driver);
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}
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module_init(fsl_i2c_init);
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