patches.baytrail/1173-i2c-move-OF-helpers-into-the-core.patch

From 0f181166c72878255ed287ba46d6e62840c5797b Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa@the-dreams.de>
Date: Thu, 11 Jul 2013 12:56:15 +0100
Subject: i2c: move OF helpers into the core

I2C of helpers used to live in of_i2c.c but experience (from SPI) shows
that it is much cleaner to have this in the core. This also removes a
circular dependency between the helpers and the core, and so we can
finally register child nodes in the core instead of doing this manually
in each driver. So, fix the drivers and documentation, too.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
(cherry picked from commit 687b81d083c082bc1e853032e3a2a54f8c251d27)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 Documentation/acpi/enumeration.txt              |    1 
 arch/powerpc/platforms/44x/warp.c               |    1 
 drivers/gpu/drm/tilcdc/tilcdc_slave.c           |    1 
 drivers/gpu/drm/tilcdc/tilcdc_tfp410.c          |    1 
 drivers/gpu/host1x/drm/output.c                 |    2 
 drivers/i2c/busses/i2c-at91.c                   |    3 
 drivers/i2c/busses/i2c-cpm.c                    |    6 -
 drivers/i2c/busses/i2c-davinci.c                |    2 
 drivers/i2c/busses/i2c-designware-platdrv.c     |    2 
 drivers/i2c/busses/i2c-gpio.c                   |    3 
 drivers/i2c/busses/i2c-i801.c                   |    2 
 drivers/i2c/busses/i2c-ibm_iic.c                |    4 
 drivers/i2c/busses/i2c-imx.c                    |    3 
 drivers/i2c/busses/i2c-mpc.c                    |    2 
 drivers/i2c/busses/i2c-mv64xxx.c                |    3 
 drivers/i2c/busses/i2c-mxs.c                    |    3 
 drivers/i2c/busses/i2c-nomadik.c                |    3 
 drivers/i2c/busses/i2c-ocores.c                 |    3 
 drivers/i2c/busses/i2c-octeon.c                 |    3 
 drivers/i2c/busses/i2c-omap.c                   |    3 
 drivers/i2c/busses/i2c-pnx.c                    |    3 
 drivers/i2c/busses/i2c-powermac.c               |    9 +
 drivers/i2c/busses/i2c-pxa.c                    |    2 
 drivers/i2c/busses/i2c-s3c2410.c                |    2 
 drivers/i2c/busses/i2c-sh_mobile.c              |    2 
 drivers/i2c/busses/i2c-sirf.c                   |    3 
 drivers/i2c/busses/i2c-stu300.c                 |    2 
 drivers/i2c/busses/i2c-tegra.c                  |    3 
 drivers/i2c/busses/i2c-versatile.c              |    2 
 drivers/i2c/busses/i2c-wmt.c                    |    3 
 drivers/i2c/busses/i2c-xiic.c                   |    3 
 drivers/i2c/i2c-core.c                          |  109 ++++++++++++++++++++++
 drivers/i2c/i2c-mux.c                           |    3 
 drivers/i2c/muxes/i2c-arb-gpio-challenge.c      |    1 
 drivers/i2c/muxes/i2c-mux-gpio.c                |    1 
 drivers/i2c/muxes/i2c-mux-pinctrl.c             |    1 
 drivers/media/platform/exynos4-is/fimc-is-i2c.c |    4 
 drivers/media/platform/exynos4-is/fimc-is.c     |    2 
 drivers/media/platform/exynos4-is/media-dev.c   |    1 
 drivers/of/Kconfig                              |    6 -
 drivers/of/Makefile                             |    1 
 drivers/of/of_i2c.c                             |  114 ------------------------
 drivers/staging/imx-drm/imx-tve.c               |    2 
 include/linux/i2c.h                             |   20 ++++
 include/linux/of_i2c.h                          |   46 ---------
 sound/soc/fsl/imx-sgtl5000.c                    |    2 
 sound/soc/fsl/imx-wm8962.c                      |    2 
 47 files changed, 138 insertions(+), 262 deletions(-)
 delete mode 100644 drivers/of/of_i2c.c
 delete mode 100644 include/linux/of_i2c.h

--- a/Documentation/acpi/enumeration.txt
+++ b/Documentation/acpi/enumeration.txt
@@ -238,7 +238,6 @@ An I2C bus (controller) driver does:
 	if (ret)
 		/* handle error */
 
-	of_i2c_register_devices(adapter);
 	/* Enumerate the slave devices behind this bus via ACPI */
 	acpi_i2c_register_devices(adapter);
 
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -16,7 +16,6 @@
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/of_gpio.h>
-#include <linux/of_i2c.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 
--- a/drivers/gpu/drm/tilcdc/tilcdc_slave.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_slave.c
@@ -16,7 +16,6 @@
  */
 
 #include <linux/i2c.h>
-#include <linux/of_i2c.h>
 #include <linux/pinctrl/pinmux.h>
 #include <linux/pinctrl/consumer.h>
 #include <drm/drm_encoder_slave.h>
--- a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
@@ -16,7 +16,6 @@
  */
 
 #include <linux/i2c.h>
-#include <linux/of_i2c.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
 #include <linux/pinctrl/pinmux.h>
--- a/drivers/gpu/host1x/drm/output.c
+++ b/drivers/gpu/host1x/drm/output.c
@@ -9,7 +9,7 @@
 
 #include <linux/module.h>
 #include <linux/of_gpio.h>
-#include <linux/of_i2c.h>
+#include <linux/i2c.h>
 
 #include "drm.h"
 
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -28,7 +28,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/platform_data/dma-atmel.h>
@@ -889,8 +888,6 @@ static int at91_twi_probe(struct platfor
 		return rc;
 	}
 
-	of_i2c_register_devices(&dev->adapter);
-
 	dev_info(dev->dev, "AT91 i2c bus driver.\n");
 	return 0;
 }
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -42,7 +42,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
-#include <linux/of_i2c.h>
 #include <sysdev/fsl_soc.h>
 #include <asm/cpm.h>
 
@@ -673,11 +672,6 @@ static int cpm_i2c_probe(struct platform
 	dev_dbg(&ofdev->dev, "hw routines for %s registered.\n",
 		cpm->adap.name);
 
-	/*
-	 * register OF I2C devices
-	 */
-	of_i2c_register_devices(&cpm->adap);
-
 	return 0;
 out_shut:
 	cpm_i2c_shutdown(cpm);
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -38,7 +38,6 @@
 #include <linux/slab.h>
 #include <linux/cpufreq.h>
 #include <linux/gpio.h>
-#include <linux/of_i2c.h>
 #include <linux/of_device.h>
 
 #include <mach/hardware.h>
@@ -726,7 +725,6 @@ static int davinci_i2c_probe(struct plat
 		dev_err(&pdev->dev, "failure adding adapter\n");
 		goto err_unuse_clocks;
 	}
-	of_i2c_register_devices(adap);
 
 	return 0;
 
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -35,7 +35,6 @@
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/of.h>
-#include <linux/of_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/pm_runtime.h>
@@ -172,7 +171,6 @@ static int dw_i2c_probe(struct platform_
 		dev_err(&pdev->dev, "failure adding adapter\n");
 		return r;
 	}
-	of_i2c_register_devices(adap);
 	acpi_i2c_register_devices(adap);
 
 	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
--- a/drivers/i2c/busses/i2c-gpio.c
+++ b/drivers/i2c/busses/i2c-gpio.c
@@ -16,7 +16,6 @@
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
-#include <linux/of_i2c.h>
 
 struct i2c_gpio_private_data {
 	struct i2c_adapter adap;
@@ -224,8 +223,6 @@ static int i2c_gpio_probe(struct platfor
 	if (ret)
 		goto err_add_bus;
 
-	of_i2c_register_devices(adap);
-
 	platform_set_drvdata(pdev, priv);
 
 	dev_info(&pdev->dev, "using pins %u (SDA) and %u (SCL%s)\n",
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -89,7 +89,6 @@
 #include <linux/slab.h>
 #include <linux/wait.h>
 #include <linux/err.h>
-#include <linux/of_i2c.h>
 
 #if (defined CONFIG_I2C_MUX_GPIO || defined CONFIG_I2C_MUX_GPIO_MODULE) && \
 		defined CONFIG_DMI
@@ -1236,7 +1235,6 @@ static int i801_probe(struct pci_dev *de
 		goto exit_free_irq;
 	}
 
-	of_i2c_register_devices(&priv->adapter);
 	i801_probe_optional_slaves(priv);
 	/* We ignore errors - multiplexing is optional */
 	i801_add_mux(priv);
--- a/drivers/i2c/busses/i2c-ibm_iic.c
+++ b/drivers/i2c/busses/i2c-ibm_iic.c
@@ -42,7 +42,6 @@
 #include <linux/io.h>
 #include <linux/i2c.h>
 #include <linux/of_platform.h>
-#include <linux/of_i2c.h>
 
 #include "i2c-ibm_iic.h"
 
@@ -759,9 +758,6 @@ static int iic_probe(struct platform_dev
 	dev_info(&ofdev->dev, "using %s mode\n",
 		 dev->fast_mode ? "fast (400 kHz)" : "standard (100 kHz)");
 
-	/* Now register all the child nodes */
-	of_i2c_register_devices(adap);
-
 	return 0;
 
 error_cleanup:
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -52,7 +52,6 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_i2c.h>
 #include <linux/platform_data/i2c-imx.h>
 
 /** Defines ********************************************************************
@@ -682,8 +681,6 @@ static int __init i2c_imx_probe(struct p
 		return ret;
 	}
 
-	of_i2c_register_devices(&i2c_imx->adapter);
-
 	/* Set up platform driver data */
 	platform_set_drvdata(pdev, i2c_imx);
 	clk_disable_unprepare(i2c_imx->clk);
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -18,7 +18,6 @@
 #include <linux/sched.h>
 #include <linux/init.h>
 #include <linux/of_platform.h>
-#include <linux/of_i2c.h>
 #include <linux/slab.h>
 
 #include <linux/io.h>
@@ -691,7 +690,6 @@ static int fsl_i2c_probe(struct platform
 		dev_err(i2c->dev, "failed to add adapter\n");
 		goto fail_add;
 	}
-	of_i2c_register_devices(&i2c->adap);
 
 	return result;
 
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -21,7 +21,6 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_irq.h>
-#include <linux/of_i2c.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/delay.h>
@@ -871,8 +870,6 @@ mv64xxx_i2c_probe(struct platform_device
 		goto exit_free_irq;
 	}
 
-	of_i2c_register_devices(&drv_data->adapter);
-
 	return 0;
 
 exit_free_irq:
--- a/drivers/i2c/busses/i2c-mxs.c
+++ b/drivers/i2c/busses/i2c-mxs.c
@@ -28,7 +28,6 @@
 #include <linux/stmp_device.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_i2c.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 
@@ -707,8 +706,6 @@ static int mxs_i2c_probe(struct platform
 		return err;
 	}
 
-	of_i2c_register_devices(adap);
-
 	return 0;
 }
 
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -25,7 +25,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/platform_data/i2c-nomadik.h>
 #include <linux/of.h>
-#include <linux/of_i2c.h>
 #include <linux/pinctrl/consumer.h>
 
 #define DRIVER_NAME "nmk-i2c"
@@ -1092,8 +1091,6 @@ static int nmk_i2c_probe(struct amba_dev
 		goto err_add_adap;
 	}
 
-	of_i2c_register_devices(adap);
-
 	pm_runtime_put(&adev->dev);
 
 	return 0;
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -24,7 +24,6 @@
 #include <linux/i2c-ocores.h>
 #include <linux/slab.h>
 #include <linux/io.h>
-#include <linux/of_i2c.h>
 #include <linux/log2.h>
 
 struct ocores_i2c {
@@ -435,8 +434,6 @@ static int ocores_i2c_probe(struct platf
 	if (pdata) {
 		for (i = 0; i < pdata->num_devices; i++)
 			i2c_new_device(&i2c->adap, pdata->devices + i);
-	} else {
-		of_i2c_register_devices(&i2c->adap);
 	}
 
 	return 0;
--- a/drivers/i2c/busses/i2c-octeon.c
+++ b/drivers/i2c/busses/i2c-octeon.c
@@ -15,7 +15,6 @@
 #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>
@@ -599,8 +598,6 @@ static int octeon_i2c_probe(struct platf
 	}
 	dev_info(i2c->dev, "version %s\n", DRV_VERSION);
 
-	of_i2c_register_devices(&i2c->adap);
-
 	return 0;
 
 out:
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -38,7 +38,6 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/of.h>
-#include <linux/of_i2c.h>
 #include <linux/of_device.h>
 #include <linux/slab.h>
 #include <linux/i2c-omap.h>
@@ -1245,8 +1244,6 @@ omap_i2c_probe(struct platform_device *p
 	dev_info(dev->dev, "bus %d rev%d.%d at %d kHz\n", adap->nr,
 		 major, minor, dev->speed);
 
-	of_i2c_register_devices(adap);
-
 	pm_runtime_mark_last_busy(dev->dev);
 	pm_runtime_put_autosuspend(dev->dev);
 
--- a/drivers/i2c/busses/i2c-pnx.c
+++ b/drivers/i2c/busses/i2c-pnx.c
@@ -23,7 +23,6 @@
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/slab.h>
-#include <linux/of_i2c.h>
 
 #define I2C_PNX_TIMEOUT_DEFAULT		10 /* msec */
 #define I2C_PNX_SPEED_KHZ_DEFAULT	100
@@ -741,8 +740,6 @@ static int i2c_pnx_probe(struct platform
 		goto out_irq;
 	}
 
-	of_i2c_register_devices(&alg_data->adapter);
-
 	dev_dbg(&pdev->dev, "%s: Master at %#8x, irq %d.\n",
 		alg_data->adapter.name, res->start, alg_data->irq);
 
--- a/drivers/i2c/busses/i2c-powermac.c
+++ b/drivers/i2c/busses/i2c-powermac.c
@@ -440,7 +440,9 @@ static int i2c_powermac_probe(struct pla
 	adapter->algo = &i2c_powermac_algorithm;
 	i2c_set_adapdata(adapter, bus);
 	adapter->dev.parent = &dev->dev;
-	adapter->dev.of_node = dev->dev.of_node;
+
+	/* Clear of_node to skip automatic registration of i2c child nodes */
+	adapter->dev.of_node = NULL;
 	rc = i2c_add_adapter(adapter);
 	if (rc) {
 		printk(KERN_ERR "i2c-powermac: Adapter %s registration "
@@ -450,9 +452,8 @@ static int i2c_powermac_probe(struct pla
 
 	printk(KERN_INFO "PowerMac i2c bus %s registered\n", adapter->name);
 
-	/* Cannot use of_i2c_register_devices() due to Apple device-tree
-	 * funkyness
-	 */
+	/* Use custom child registration due to Apple device-tree funkyness */
+	adapter->dev.of_node = dev->dev.of_node;
 	i2c_powermac_register_devices(adapter, bus);
 
 	return rc;
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -31,7 +31,6 @@
 #include <linux/i2c-pxa.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
-#include <linux/of_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/err.h>
 #include <linux/clk.h>
@@ -1185,7 +1184,6 @@ static int i2c_pxa_probe(struct platform
 		printk(KERN_INFO "I2C: Failed to add bus\n");
 		goto eadapt;
 	}
-	of_i2c_register_devices(&i2c->adap);
 
 	platform_set_drvdata(dev, i2c);
 
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -36,7 +36,6 @@
 #include <linux/cpufreq.h>
 #include <linux/slab.h>
 #include <linux/io.h>
-#include <linux/of_i2c.h>
 #include <linux/of_gpio.h>
 #include <linux/pinctrl/consumer.h>
 
@@ -1154,7 +1153,6 @@ static int s3c24xx_i2c_probe(struct plat
 		return ret;
 	}
 
-	of_i2c_register_devices(&i2c->adap);
 	platform_set_drvdata(pdev, i2c);
 
 	pm_runtime_enable(&pdev->dev);
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -27,7 +27,6 @@
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/i2c.h>
-#include <linux/of_i2c.h>
 #include <linux/err.h>
 #include <linux/pm_runtime.h>
 #include <linux/clk.h>
@@ -758,7 +757,6 @@ static int sh_mobile_i2c_probe(struct pl
 		 "I2C adapter %d with bus speed %lu Hz (L/H=%x/%x)\n",
 		 adap->nr, pd->bus_speed, pd->iccl, pd->icch);
 
-	of_i2c_register_devices(adap);
 	return 0;
 
  err_all:
--- a/drivers/i2c/busses/i2c-sirf.c
+++ b/drivers/i2c/busses/i2c-sirf.c
@@ -12,7 +12,6 @@
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
-#include <linux/of_i2c.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
@@ -366,8 +365,6 @@ static int i2c_sirfsoc_probe(struct plat
 
 	clk_disable(clk);
 
-	of_i2c_register_devices(adap);
-
 	dev_info(&pdev->dev, " I2C adapter ready to operate\n");
 
 	return 0;
--- a/drivers/i2c/busses/i2c-stu300.c
+++ b/drivers/i2c/busses/i2c-stu300.c
@@ -17,7 +17,6 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/slab.h>
-#include <linux/of_i2c.h>
 
 /* the name of this kernel module */
 #define NAME "stu300"
@@ -936,7 +935,6 @@ stu300_probe(struct platform_device *pde
 	platform_set_drvdata(pdev, dev);
 	dev_info(&pdev->dev, "ST DDC I2C @ %p, irq %d\n",
 		 dev->virtbase, dev->irq);
-	of_i2c_register_devices(adap);
 
 	return 0;
 }
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -25,7 +25,6 @@
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
-#include <linux/of_i2c.h>
 #include <linux/of_device.h>
 #include <linux/module.h>
 #include <linux/clk/tegra.h>
@@ -802,8 +801,6 @@ static int tegra_i2c_probe(struct platfo
 		return ret;
 	}
 
-	of_i2c_register_devices(&i2c_dev->adapter);
-
 	return 0;
 }
 
--- a/drivers/i2c/busses/i2c-versatile.c
+++ b/drivers/i2c/busses/i2c-versatile.c
@@ -16,7 +16,6 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/io.h>
-#include <linux/of_i2c.h>
 
 #define I2C_CONTROL	0x00
 #define I2C_CONTROLS	0x00
@@ -108,7 +107,6 @@ static int i2c_versatile_probe(struct pl
 	ret = i2c_bit_add_numbered_bus(&i2c->adap);
 	if (ret >= 0) {
 		platform_set_drvdata(dev, i2c);
-		of_i2c_register_devices(&i2c->adap);
 		return 0;
 	}
 
--- a/drivers/i2c/busses/i2c-wmt.c
+++ b/drivers/i2c/busses/i2c-wmt.c
@@ -21,7 +21,6 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_i2c.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
 
@@ -439,8 +438,6 @@ static int wmt_i2c_probe(struct platform
 
 	platform_set_drvdata(pdev, i2c_dev);
 
-	of_i2c_register_devices(adap);
-
 	return 0;
 }
 
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -40,7 +40,6 @@
 #include <linux/i2c-xiic.h>
 #include <linux/io.h>
 #include <linux/slab.h>
-#include <linux/of_i2c.h>
 
 #define DRIVER_NAME "xiic-i2c"
 
@@ -752,8 +751,6 @@ static int xiic_i2c_probe(struct platfor
 			i2c_new_device(&i2c->adap, pdata->devices + i);
 	}
 
-	of_i2c_register_devices(&i2c->adap);
-
 	return 0;
 
 add_adapter_failed:
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -23,7 +23,11 @@
    SMBus 2.0 support by Mark Studebaker <mdsxyz123@yahoo.com> and
    Jean Delvare <khali@linux-fr.org>
    Mux support by Rodolfo Giometti <giometti@enneenne.com> and
-   Michael Lawnick <michael.lawnick.ext@nsn.com> */
+   Michael Lawnick <michael.lawnick.ext@nsn.com>
+   OF support is copyright (c) 2008 Jochen Friedrich <jochen@scram.de>
+   (based on a previous patch from Jon Smirl <jonsmirl@gmail.com>) and
+   (c) 2013  Wolfram Sang <wsa@the-dreams.de>
+ */
 
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -35,7 +39,9 @@
 #include <linux/init.h>
 #include <linux/idr.h>
 #include <linux/mutex.h>
+#include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/of_irq.h>
 #include <linux/completion.h>
 #include <linux/hardirq.h>
 #include <linux/irqflags.h>
@@ -957,6 +963,104 @@ static void i2c_scan_static_board_info(s
 	up_read(&__i2c_board_lock);
 }
 
+/* OF support code */
+
+#if IS_ENABLED(CONFIG_OF)
+static void of_i2c_register_devices(struct i2c_adapter *adap)
+{
+	void *result;
+	struct device_node *node;
+
+	/* Only register child devices if the adapter has a node pointer set */
+	if (!adap->dev.of_node)
+		return;
+
+	dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
+
+	for_each_available_child_of_node(adap->dev.of_node, node) {
+		struct i2c_board_info info = {};
+		struct dev_archdata dev_ad = {};
+		const __be32 *addr;
+		int len;
+
+		dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name);
+
+		if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) {
+			dev_err(&adap->dev, "of_i2c: modalias failure on %s\n",
+				node->full_name);
+			continue;
+		}
+
+		addr = of_get_property(node, "reg", &len);
+		if (!addr || (len < sizeof(int))) {
+			dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
+				node->full_name);
+			continue;
+		}
+
+		info.addr = be32_to_cpup(addr);
+		if (info.addr > (1 << 10) - 1) {
+			dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
+				info.addr, node->full_name);
+			continue;
+		}
+
+		info.irq = irq_of_parse_and_map(node, 0);
+		info.of_node = of_node_get(node);
+		info.archdata = &dev_ad;
+
+		if (of_get_property(node, "wakeup-source", NULL))
+			info.flags |= I2C_CLIENT_WAKE;
+
+		request_module("%s%s", I2C_MODULE_PREFIX, info.type);
+
+		result = i2c_new_device(adap, &info);
+		if (result == NULL) {
+			dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
+				node->full_name);
+			of_node_put(node);
+			irq_dispose_mapping(info.irq);
+			continue;
+		}
+	}
+}
+
+static int of_dev_node_match(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+/* must call put_device() when done with returned i2c_client device */
+struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
+{
+	struct device *dev;
+
+	dev = bus_find_device(&i2c_bus_type, NULL, node,
+					 of_dev_node_match);
+	if (!dev)
+		return NULL;
+
+	return i2c_verify_client(dev);
+}
+EXPORT_SYMBOL(of_find_i2c_device_by_node);
+
+/* must call put_device() when done with returned i2c_adapter device */
+struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
+{
+	struct device *dev;
+
+	dev = bus_find_device(&i2c_bus_type, NULL, node,
+					 of_dev_node_match);
+	if (!dev)
+		return NULL;
+
+	return i2c_verify_adapter(dev);
+}
+EXPORT_SYMBOL(of_find_i2c_adapter_by_node);
+#else
+static void of_i2c_register_devices(struct i2c_adapter *adap) { }
+#endif /* CONFIG_OF */
+
 static int i2c_do_add_adapter(struct i2c_driver *driver,
 			      struct i2c_adapter *adap)
 {
@@ -1061,6 +1165,8 @@ static int i2c_register_adapter(struct i
 
 exit_recovery:
 	/* create pre-declared device nodes */
+	of_i2c_register_devices(adap);
+
 	if (adap->nr < __i2c_first_dynamic_bus_num)
 		i2c_scan_static_board_info(adap);
 
@@ -1285,7 +1391,6 @@ void i2c_del_adapter(struct i2c_adapter
 }
 EXPORT_SYMBOL(i2c_del_adapter);
 
-
 /* ------------------------------------------------------------------------- */
 
 int i2c_for_each_dev(void *data, int (*fn)(struct device *, void *))
--- a/drivers/i2c/i2c-mux.c
+++ b/drivers/i2c/i2c-mux.c
@@ -25,7 +25,6 @@
 #include <linux/i2c.h>
 #include <linux/i2c-mux.h>
 #include <linux/of.h>
-#include <linux/of_i2c.h>
 
 /* multiplexer per channel data */
 struct i2c_mux_priv {
@@ -185,8 +184,6 @@ struct i2c_adapter *i2c_add_mux_adapter(
 	dev_info(&parent->dev, "Added multiplexed i2c bus %d\n",
 		 i2c_adapter_id(&priv->adap));
 
-	of_i2c_register_devices(&priv->adap);
-
 	return &priv->adap;
 }
 EXPORT_SYMBOL_GPL(i2c_add_mux_adapter);
--- a/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
+++ b/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
@@ -21,7 +21,6 @@
 #include <linux/i2c-mux.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/of_i2c.h>
 #include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -16,7 +16,6 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
-#include <linux/of_i2c.h>
 #include <linux/of_gpio.h>
 
 struct gpiomux {
--- a/drivers/i2c/muxes/i2c-mux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-mux-pinctrl.c
@@ -20,7 +20,6 @@
 #include <linux/i2c-mux.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/of_i2c.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/i2c-mux-pinctrl.h>
 #include <linux/platform_device.h>
--- a/drivers/media/platform/exynos4-is/fimc-is-i2c.c
+++ b/drivers/media/platform/exynos4-is/fimc-is-i2c.c
@@ -12,7 +12,7 @@
 
 #include <linux/clk.h>
 #include <linux/module.h>
-#include <linux/of_i2c.h>
+#include <linux/i2c.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
@@ -67,8 +67,6 @@ static int fimc_is_i2c_probe(struct plat
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_enable(&i2c_adap->dev);
 
-	of_i2c_register_devices(i2c_adap);
-
 	return 0;
 }
 
--- a/drivers/media/platform/exynos4-is/fimc-is.c
+++ b/drivers/media/platform/exynos4-is/fimc-is.c
@@ -21,7 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_i2c.h>
+#include <linux/i2c.h>
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
--- a/drivers/media/platform/exynos4-is/media-dev.c
+++ b/drivers/media/platform/exynos4-is/media-dev.c
@@ -20,7 +20,6 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/of_device.h>
-#include <linux/of_i2c.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/types.h>
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -48,12 +48,6 @@ config OF_IRQ
 	def_bool y
 	depends on !SPARC
 
-config OF_I2C
-	def_tristate I2C
-	depends on I2C
-	help
-	  OpenFirmware I2C accessors
-
 config OF_NET
 	depends on NETDEVICES
 	def_bool y
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -3,7 +3,6 @@ obj-$(CONFIG_OF_FLATTREE) += fdt.o
 obj-$(CONFIG_OF_PROMTREE) += pdt.o
 obj-$(CONFIG_OF_ADDRESS)  += address.o
 obj-$(CONFIG_OF_IRQ)    += irq.o
-obj-$(CONFIG_OF_I2C)	+= of_i2c.o
 obj-$(CONFIG_OF_NET)	+= of_net.o
 obj-$(CONFIG_OF_SELFTEST) += selftest.o
 obj-$(CONFIG_OF_MDIO)	+= of_mdio.o
--- a/drivers/of/of_i2c.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * OF helpers for the I2C API
- *
- * Copyright (c) 2008 Jochen Friedrich <jochen@scram.de>
- *
- * Based on a previous patch from Jon Smirl <jonsmirl@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/i2c.h>
-#include <linux/irq.h>
-#include <linux/of.h>
-#include <linux/of_i2c.h>
-#include <linux/of_irq.h>
-#include <linux/module.h>
-
-void of_i2c_register_devices(struct i2c_adapter *adap)
-{
-	void *result;
-	struct device_node *node;
-
-	/* Only register child devices if the adapter has a node pointer set */
-	if (!adap->dev.of_node)
-		return;
-
-	dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
-
-	for_each_available_child_of_node(adap->dev.of_node, node) {
-		struct i2c_board_info info = {};
-		struct dev_archdata dev_ad = {};
-		const __be32 *addr;
-		int len;
-
-		dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name);
-
-		if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) {
-			dev_err(&adap->dev, "of_i2c: modalias failure on %s\n",
-				node->full_name);
-			continue;
-		}
-
-		addr = of_get_property(node, "reg", &len);
-		if (!addr || (len < sizeof(int))) {
-			dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
-				node->full_name);
-			continue;
-		}
-
-		info.addr = be32_to_cpup(addr);
-		if (info.addr > (1 << 10) - 1) {
-			dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
-				info.addr, node->full_name);
-			continue;
-		}
-
-		info.irq = irq_of_parse_and_map(node, 0);
-		info.of_node = of_node_get(node);
-		info.archdata = &dev_ad;
-
-		if (of_get_property(node, "wakeup-source", NULL))
-			info.flags |= I2C_CLIENT_WAKE;
-
-		request_module("%s%s", I2C_MODULE_PREFIX, info.type);
-
-		result = i2c_new_device(adap, &info);
-		if (result == NULL) {
-			dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
-			        node->full_name);
-			of_node_put(node);
-			irq_dispose_mapping(info.irq);
-			continue;
-		}
-	}
-}
-EXPORT_SYMBOL(of_i2c_register_devices);
-
-static int of_dev_node_match(struct device *dev, void *data)
-{
-        return dev->of_node == data;
-}
-
-/* must call put_device() when done with returned i2c_client device */
-struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
-{
-	struct device *dev;
-
-	dev = bus_find_device(&i2c_bus_type, NULL, node,
-					 of_dev_node_match);
-	if (!dev)
-		return NULL;
-
-	return i2c_verify_client(dev);
-}
-EXPORT_SYMBOL(of_find_i2c_device_by_node);
-
-/* must call put_device() when done with returned i2c_adapter device */
-struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
-{
-	struct device *dev;
-
-	dev = bus_find_device(&i2c_bus_type, NULL, node,
-					 of_dev_node_match);
-	if (!dev)
-		return NULL;
-
-	return i2c_verify_adapter(dev);
-}
-EXPORT_SYMBOL(of_find_i2c_adapter_by_node);
-
-MODULE_LICENSE("GPL");
--- a/drivers/staging/imx-drm/imx-tve.c
+++ b/drivers/staging/imx-drm/imx-tve.c
@@ -21,7 +21,7 @@
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/module.h>
-#include <linux/of_i2c.h>
+#include <linux/i2c.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spinlock.h>
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -542,6 +542,26 @@ static inline int i2c_adapter_id(struct
 
 #endif /* I2C */
 
+#if IS_ENABLED(CONFIG_OF)
+/* must call put_device() when done with returned i2c_client device */
+extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
+
+/* must call put_device() when done with returned i2c_adapter device */
+extern struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);
+
+#else
+
+static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
+{
+	return NULL;
+}
+
+static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
+{
+	return NULL;
+}
+#endif /* CONFIG_OF */
+
 #if IS_ENABLED(CONFIG_ACPI_I2C)
 extern void acpi_i2c_register_devices(struct i2c_adapter *adap);
 #else
--- a/include/linux/of_i2c.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Generic I2C API implementation for PowerPC.
- *
- * Copyright (c) 2008 Jochen Friedrich <jochen@scram.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __LINUX_OF_I2C_H
-#define __LINUX_OF_I2C_H
-
-#if defined(CONFIG_OF_I2C) || defined(CONFIG_OF_I2C_MODULE)
-#include <linux/i2c.h>
-
-extern void of_i2c_register_devices(struct i2c_adapter *adap);
-
-/* must call put_device() when done with returned i2c_client device */
-extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
-
-/* must call put_device() when done with returned i2c_adapter device */
-extern struct i2c_adapter *of_find_i2c_adapter_by_node(
-						struct device_node *node);
-
-#else
-static inline void of_i2c_register_devices(struct i2c_adapter *adap)
-{
-	return;
-}
-
-static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
-{
-	return NULL;
-}
-
-/* must call put_device() when done with returned i2c_adapter device */
-static inline struct i2c_adapter *of_find_i2c_adapter_by_node(
-						struct device_node *node)
-{
-	return NULL;
-}
-#endif /* CONFIG_OF_I2C */
-
-#endif /* __LINUX_OF_I2C_H */
--- a/sound/soc/fsl/imx-sgtl5000.c
+++ b/sound/soc/fsl/imx-sgtl5000.c
@@ -13,7 +13,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
-#include <linux/of_i2c.h>
+#include <linux/i2c.h>
 #include <linux/clk.h>
 #include <sound/soc.h>
 
--- a/sound/soc/fsl/imx-wm8962.c
+++ b/sound/soc/fsl/imx-wm8962.c
@@ -15,7 +15,7 @@
 
 #include <linux/module.h>
 #include <linux/of_platform.h>
-#include <linux/of_i2c.h>
+#include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
 #include <sound/soc.h>