diff options
Diffstat (limited to 'recipes-kernel/linux/linux-handheld-4.0/locomo/0011-i2c-add-locomo-i2c-driver.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-handheld-4.0/locomo/0011-i2c-add-locomo-i2c-driver.patch | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-handheld-4.0/locomo/0011-i2c-add-locomo-i2c-driver.patch b/recipes-kernel/linux/linux-handheld-4.0/locomo/0011-i2c-add-locomo-i2c-driver.patch new file mode 100644 index 0000000..43a2bd3 --- /dev/null +++ b/recipes-kernel/linux/linux-handheld-4.0/locomo/0011-i2c-add-locomo-i2c-driver.patch @@ -0,0 +1,196 @@ +From 37279f73cbea78da52a4eac4a4c13406ff5500da Mon Sep 17 00:00:00 2001 +From: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> +Date: Fri, 14 Nov 2014 16:07:58 +0300 +Subject: [PATCH 11/20] i2c: add locomo i2c driver + +LoCoMo chip contains a tiny i2c controller destined to control +M62332 DAC. Provide a separate I2C driver for this cell. + +Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> +--- + drivers/i2c/busses/Kconfig | 12 ++++ + drivers/i2c/busses/Makefile | 1 + + drivers/i2c/busses/i2c-locomo.c | 136 ++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 149 insertions(+) + create mode 100644 drivers/i2c/busses/i2c-locomo.c + +diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig +index 22da9c2..a4b20ba 100644 +--- a/drivers/i2c/busses/Kconfig ++++ b/drivers/i2c/busses/Kconfig +@@ -584,6 +584,18 @@ config I2C_KEMPLD + This driver can also be built as a module. If so, the module + will be called i2c-kempld. + ++config I2C_LOCOMO ++ tristate "I2C bus support for LoCoMo chips" ++ depends on MFD_LOCOMO ++ select I2C_ALGOBIT ++ help ++ Say yes if you will run the kernel on Sharp SL-5x00 family of devices. ++ ++ If you don't know what to do here, say N. ++ ++ This driver can also be built as a module. If so, the module ++ will be called i2c-locomo. ++ + config I2C_MESON + tristate "Amlogic Meson I2C controller" + depends on ARCH_MESON +diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile +index 3638feb..d31ae1a 100644 +--- a/drivers/i2c/busses/Makefile ++++ b/drivers/i2c/busses/Makefile +@@ -56,6 +56,7 @@ obj-$(CONFIG_I2C_IMG) += i2c-img-scb.o + obj-$(CONFIG_I2C_IMX) += i2c-imx.o + obj-$(CONFIG_I2C_IOP3XX) += i2c-iop3xx.o + obj-$(CONFIG_I2C_KEMPLD) += i2c-kempld.o ++obj-$(CONFIG_I2C_LOCOMO) += i2c-locomo.o + obj-$(CONFIG_I2C_MESON) += i2c-meson.o + obj-$(CONFIG_I2C_MPC) += i2c-mpc.o + obj-$(CONFIG_I2C_MV64XXX) += i2c-mv64xxx.o +diff --git a/drivers/i2c/busses/i2c-locomo.c b/drivers/i2c/busses/i2c-locomo.c +new file mode 100644 +index 0000000..640b46cd +--- /dev/null ++++ b/drivers/i2c/busses/i2c-locomo.c +@@ -0,0 +1,136 @@ ++/* ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/platform_device.h> ++#include <linux/regmap.h> ++#include <linux/slab.h> ++#include <linux/mfd/locomo.h> ++ ++#include <linux/i2c.h> ++#include <linux/i2c-algo-bit.h> ++ ++struct locomo_i2c { ++ struct regmap *regmap; ++ struct i2c_adapter adap; ++ struct i2c_algo_bit_data bit; ++}; ++ ++static void locomo_i2c_setsda(void *data, int state) ++{ ++ struct locomo_i2c *li2c = data; ++ ++ regmap_update_bits(li2c->regmap, LOCOMO_DAC, ++ LOCOMO_DAC_SDAOEB, ++ state ? LOCOMO_DAC_SDAOEB : 0); ++} ++ ++static void locomo_i2c_setscl(void *data, int state) ++{ ++ struct locomo_i2c *li2c = data; ++ ++ regmap_update_bits(li2c->regmap, LOCOMO_DAC, ++ LOCOMO_DAC_SCLOEB, ++ state ? LOCOMO_DAC_SCLOEB : 0); ++} ++ ++static int locomo_i2c_getsda(void *data) ++{ ++ struct locomo_i2c *li2c = data; ++ unsigned int r; ++ ++ regmap_read(li2c->regmap, LOCOMO_DAC, &r); ++ ++ return !!(r & LOCOMO_DAC_SDA); ++} ++ ++static int locomo_i2c_probe(struct platform_device *dev) ++{ ++ struct locomo_i2c *li2c; ++ int ret; ++ ++ li2c = devm_kzalloc(&dev->dev, sizeof(struct locomo_i2c), GFP_KERNEL); ++ if (li2c == NULL) ++ return -ENOMEM; ++ ++ li2c->regmap = dev_get_regmap(dev->dev.parent, NULL); ++ if (!li2c->regmap) ++ return -ENODEV; ++ ++ li2c->adap.owner = THIS_MODULE; ++ li2c->adap.dev.parent = &dev->dev; ++ li2c->adap.dev.of_node = dev->dev.of_node; ++ li2c->adap.algo_data = &li2c->bit; ++ li2c->adap.nr = 1; /* On poodle, 0 is pxa internal bus */ ++ ++ strlcpy(li2c->adap.name, "LoCoMo I2C", sizeof(li2c->adap.name)); ++ ++ li2c->bit.data = li2c; ++ li2c->bit.setsda = locomo_i2c_setsda; ++ li2c->bit.setscl = locomo_i2c_setscl; ++ li2c->bit.getsda = locomo_i2c_getsda; ++ li2c->bit.udelay = 6; ++ li2c->bit.timeout = HZ; ++ ++ ret = i2c_bit_add_numbered_bus(&li2c->adap); ++ if (ret) ++ return ret; ++ ++ platform_set_drvdata(dev, li2c); ++ ++ return 0; ++} ++ ++static int locomo_i2c_remove(struct platform_device *dev) ++{ ++ struct locomo_i2c *li2c = platform_get_drvdata(dev); ++ ++ i2c_del_adapter(&li2c->adap); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM_SLEEP ++static int locomo_i2c_suspend(struct device *dev) ++{ ++ struct locomo_i2c *li2c = dev_get_drvdata(dev); ++ ++ regmap_write(li2c->regmap, LOCOMO_DAC, 0x00); ++ ++ return 0; ++} ++ ++static int locomo_i2c_resume(struct device *dev) ++{ ++ struct locomo_i2c *li2c = dev_get_drvdata(dev); ++ ++ regmap_write(li2c->regmap, LOCOMO_DAC, ++ LOCOMO_DAC_SDAOEB | LOCOMO_DAC_SCLOEB); ++ ++ return 0; ++} ++static SIMPLE_DEV_PM_OPS(locomo_i2c_pm, locomo_i2c_suspend, locomo_i2c_resume); ++#define LOCOMO_I2C_PM (&locomo_i2c_pm) ++#else ++#define LOCOMO_I2C_PM NULL ++#endif ++ ++ ++static struct platform_driver locomo_i2c_driver = { ++ .driver = { ++ .name = "locomo-i2c", ++ .pm = LOCOMO_I2C_PM, ++ }, ++ .probe = locomo_i2c_probe, ++ .remove = locomo_i2c_remove, ++}; ++ ++module_platform_driver(locomo_i2c_driver); ++ ++MODULE_DESCRIPTION("LoCoMo i2c bus driver"); ++MODULE_AUTHOR("Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>"); ++MODULE_LICENSE("GPL v2"); ++MODULE_ALIAS("platform:locomo-i2c"); +-- +1.9.1 + |