diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/Kconfig | 47 | ||||
| -rw-r--r-- | drivers/platform/chrome/Makefile | 7 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_debugfs.c | 62 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_i2c.c | 10 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lightbar.c | 126 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 4 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_spi.c | 11 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_sysfs.c | 36 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_vbc.c | 59 |
9 files changed, 247 insertions, 115 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig index 16b1615958aa..5e2fde5ff63d 100644 --- a/drivers/platform/chrome/Kconfig +++ b/drivers/platform/chrome/Kconfig @@ -49,9 +49,6 @@ config CHROMEOS_TBMC To compile this driver as a module, choose M here: the module will be called chromeos_tbmc. -config CROS_EC_CTL - tristate - config CROS_EC_I2C tristate "ChromeOS Embedded Controller (I2C)" depends on MFD_CROS_EC && I2C @@ -111,4 +108,48 @@ config CROS_KBD_LED_BACKLIGHT To compile this driver as a module, choose M here: the module will be called cros_kbd_led_backlight. +config CROS_EC_LIGHTBAR + tristate "Chromebook Pixel's lightbar support" + depends on MFD_CROS_EC_CHARDEV + default MFD_CROS_EC_CHARDEV + help + This option exposes the Chromebook Pixel's lightbar to + userspace. + + To compile this driver as a module, choose M here: the + module will be called cros_ec_lightbar. + +config CROS_EC_VBC + tristate "ChromeOS EC vboot context support" + depends on MFD_CROS_EC_CHARDEV && OF + default MFD_CROS_EC_CHARDEV + help + This option exposes the ChromeOS EC vboot context nvram to + userspace. + + To compile this driver as a module, choose M here: the + module will be called cros_ec_vbc. + +config CROS_EC_DEBUGFS + tristate "Export ChromeOS EC internals in DebugFS" + depends on MFD_CROS_EC_CHARDEV && DEBUG_FS + default MFD_CROS_EC_CHARDEV + help + This option exposes the ChromeOS EC device internals to + userspace. + + To compile this driver as a module, choose M here: the + module will be called cros_ec_debugfs. + +config CROS_EC_SYSFS + tristate "ChromeOS EC control and information through sysfs" + depends on MFD_CROS_EC_CHARDEV && SYSFS + default MFD_CROS_EC_CHARDEV + help + This option exposes some sysfs attributes to control and get + information from ChromeOS EC. + + To compile this driver as a module, choose M here: the + module will be called cros_ec_sysfs. + endif # CHROMEOS_PLATFORMS diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile index cd591bf872bb..fdbee501931b 100644 --- a/drivers/platform/chrome/Makefile +++ b/drivers/platform/chrome/Makefile @@ -3,9 +3,6 @@ obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o obj-$(CONFIG_CHROMEOS_TBMC) += chromeos_tbmc.o -cros_ec_ctl-objs := cros_ec_sysfs.o cros_ec_lightbar.o \ - cros_ec_vbc.o cros_ec_debugfs.o -obj-$(CONFIG_CROS_EC_CTL) += cros_ec_ctl.o obj-$(CONFIG_CROS_EC_I2C) += cros_ec_i2c.o obj-$(CONFIG_CROS_EC_SPI) += cros_ec_spi.o cros_ec_lpcs-objs := cros_ec_lpc.o cros_ec_lpc_reg.o @@ -13,3 +10,7 @@ cros_ec_lpcs-$(CONFIG_CROS_EC_LPC_MEC) += cros_ec_lpc_mec.o obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpcs.o obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o obj-$(CONFIG_CROS_KBD_LED_BACKLIGHT) += cros_kbd_led_backlight.o +obj-$(CONFIG_CROS_EC_LIGHTBAR) += cros_ec_lightbar.o +obj-$(CONFIG_CROS_EC_VBC) += cros_ec_vbc.o +obj-$(CONFIG_CROS_EC_DEBUGFS) += cros_ec_debugfs.o +obj-$(CONFIG_CROS_EC_SYSFS) += cros_ec_sysfs.o diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c index c62ee8e610a0..6cacac53dfce 100644 --- a/drivers/platform/chrome/cros_ec_debugfs.c +++ b/drivers/platform/chrome/cros_ec_debugfs.c @@ -23,12 +23,16 @@ #include <linux/fs.h> #include <linux/mfd/cros_ec.h> #include <linux/mfd/cros_ec_commands.h> +#include <linux/module.h> #include <linux/mutex.h> +#include <linux/platform_device.h> #include <linux/poll.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/wait.h> +#define DRV_NAME "cros-ec-debugfs" + #define LOG_SHIFT 14 #define LOG_SIZE (1 << LOG_SHIFT) #define LOG_POLL_SEC 10 @@ -423,8 +427,9 @@ static int cros_ec_create_pdinfo(struct cros_ec_debugfs *debug_info) return 0; } -int cros_ec_debugfs_init(struct cros_ec_dev *ec) +static int cros_ec_debugfs_probe(struct platform_device *pd) { + struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent); struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev); const char *name = ec_platform->ec_name; struct cros_ec_debugfs *debug_info; @@ -453,40 +458,57 @@ int cros_ec_debugfs_init(struct cros_ec_dev *ec) ec->debug_info = debug_info; + dev_set_drvdata(&pd->dev, ec); + return 0; remove_debugfs: debugfs_remove_recursive(debug_info->dir); return ret; } -EXPORT_SYMBOL(cros_ec_debugfs_init); -void cros_ec_debugfs_remove(struct cros_ec_dev *ec) +static int cros_ec_debugfs_remove(struct platform_device *pd) { - if (!ec->debug_info) - return; + struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent); debugfs_remove_recursive(ec->debug_info->dir); cros_ec_cleanup_console_log(ec->debug_info); + + return 0; } -EXPORT_SYMBOL(cros_ec_debugfs_remove); -void cros_ec_debugfs_suspend(struct cros_ec_dev *ec) +static int __maybe_unused cros_ec_debugfs_suspend(struct device *dev) { - /* - * cros_ec_debugfs_init() failures are non-fatal; it's also possible - * that we initted things but decided that console log wasn't supported. - * We'll use the same set of checks that cros_ec_debugfs_remove() + - * cros_ec_cleanup_console_log() end up using to handle those cases. - */ - if (ec->debug_info && ec->debug_info->log_buffer.buf) - cancel_delayed_work_sync(&ec->debug_info->log_poll_work); + struct cros_ec_dev *ec = dev_get_drvdata(dev); + + cancel_delayed_work_sync(&ec->debug_info->log_poll_work); + + return 0; } -EXPORT_SYMBOL(cros_ec_debugfs_suspend); -void cros_ec_debugfs_resume(struct cros_ec_dev *ec) +static int __maybe_unused cros_ec_debugfs_resume(struct device *dev) { - if (ec->debug_info && ec->debug_info->log_buffer.buf) - schedule_delayed_work(&ec->debug_info->log_poll_work, 0); + struct cros_ec_dev *ec = dev_get_drvdata(dev); + + schedule_delayed_work(&ec->debug_info->log_poll_work, 0); + + return 0; } -EXPORT_SYMBOL(cros_ec_debugfs_resume); + +static SIMPLE_DEV_PM_OPS(cros_ec_debugfs_pm_ops, + cros_ec_debugfs_suspend, cros_ec_debugfs_resume); + +static struct platform_driver cros_ec_debugfs_driver = { + .driver = { + .name = DRV_NAME, + .pm = &cros_ec_debugfs_pm_ops, + }, + .probe = cros_ec_debugfs_probe, + .remove = cros_ec_debugfs_remove, +}; + +module_platform_driver(cros_ec_debugfs_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Debug logs for ChromeOS EC"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/platform/chrome/cros_ec_i2c.c b/drivers/platform/chrome/cros_ec_i2c.c index ef9b4763356f..9a009eaa4ada 100644 --- a/drivers/platform/chrome/cros_ec_i2c.c +++ b/drivers/platform/chrome/cros_ec_i2c.c @@ -317,15 +317,6 @@ static int cros_ec_i2c_probe(struct i2c_client *client, return 0; } -static int cros_ec_i2c_remove(struct i2c_client *client) -{ - struct cros_ec_device *ec_dev = i2c_get_clientdata(client); - - cros_ec_remove(ec_dev); - - return 0; -} - #ifdef CONFIG_PM_SLEEP static int cros_ec_i2c_suspend(struct device *dev) { @@ -376,7 +367,6 @@ static struct i2c_driver cros_ec_driver = { .pm = &cros_ec_i2c_pm_ops, }, .probe = cros_ec_i2c_probe, - .remove = cros_ec_i2c_remove, .id_table = cros_ec_i2c_id, }; diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c index 68193bb53383..c3e4e6e5211d 100644 --- a/drivers/platform/chrome/cros_ec_lightbar.c +++ b/drivers/platform/chrome/cros_ec_lightbar.c @@ -33,6 +33,8 @@ #include <linux/uaccess.h> #include <linux/slab.h> +#define DRV_NAME "cros-ec-lightbar" + /* Rate-limit the lightbar interface to prevent DoS. */ static unsigned long lb_interval_jiffies = 50 * HZ / 1000; @@ -41,7 +43,6 @@ static unsigned long lb_interval_jiffies = 50 * HZ / 1000; * If this is true, we won't do anything during suspend/resume. */ static bool userspace_control; -static struct cros_ec_dev *ec_with_lightbar; static ssize_t interval_msec_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -373,15 +374,12 @@ error: return ret; } -int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable) +static int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable) { struct ec_params_lightbar *param; struct cros_ec_command *msg; int ret; - if (ec != ec_with_lightbar) - return 0; - msg = alloc_lightbar_cmd_msg(ec); if (!msg) return -ENOMEM; @@ -408,25 +406,6 @@ error: return ret; } -EXPORT_SYMBOL(lb_manual_suspend_ctrl); - -int lb_suspend(struct cros_ec_dev *ec) -{ - if (userspace_control || ec != ec_with_lightbar) - return 0; - - return lb_send_empty_cmd(ec, LIGHTBAR_CMD_SUSPEND); -} -EXPORT_SYMBOL(lb_suspend); - -int lb_resume(struct cros_ec_dev *ec) -{ - if (userspace_control || ec != ec_with_lightbar) - return 0; - - return lb_send_empty_cmd(ec, LIGHTBAR_CMD_RESUME); -} -EXPORT_SYMBOL(lb_resume); static ssize_t sequence_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -584,36 +563,91 @@ static struct attribute *__lb_cmds_attrs[] = { NULL, }; -bool ec_has_lightbar(struct cros_ec_dev *ec) +struct attribute_group cros_ec_lightbar_attr_group = { + .name = "lightbar", + .attrs = __lb_cmds_attrs, +}; + +static int cros_ec_lightbar_probe(struct platform_device *pd) { - return !!get_lightbar_version(ec, NULL, NULL); + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); + struct cros_ec_platform *pdata = dev_get_platdata(ec_dev->dev); + struct device *dev = &pd->dev; + int ret; + + /* + * Only instantiate the lightbar if the EC name is 'cros_ec'. Other EC + * devices like 'cros_pd' doesn't have a lightbar. + */ + if (strcmp(pdata->ec_name, CROS_EC_DEV_NAME) != 0) + return -ENODEV; + + /* + * Ask then for the lightbar version, if it's 0 then the 'cros_ec' + * doesn't have a lightbar. + */ + if (!get_lightbar_version(ec_dev, NULL, NULL)) + return -ENODEV; + + /* Take control of the lightbar from the EC. */ + lb_manual_suspend_ctrl(ec_dev, 1); + + ret = sysfs_create_group(&ec_dev->class_dev.kobj, + &cros_ec_lightbar_attr_group); + if (ret < 0) + dev_err(dev, "failed to create %s attributes. err=%d\n", + cros_ec_lightbar_attr_group.name, ret); + + return ret; } -static umode_t cros_ec_lightbar_attrs_are_visible(struct kobject *kobj, - struct attribute *a, int n) +static int cros_ec_lightbar_remove(struct platform_device *pd) { - struct device *dev = container_of(kobj, struct device, kobj); - struct cros_ec_dev *ec = to_cros_ec_dev(dev); - struct platform_device *pdev = to_platform_device(ec->dev); - struct cros_ec_platform *pdata = pdev->dev.platform_data; - int is_cros_ec; + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); - is_cros_ec = strcmp(pdata->ec_name, CROS_EC_DEV_NAME); + sysfs_remove_group(&ec_dev->class_dev.kobj, + &cros_ec_lightbar_attr_group); - if (is_cros_ec != 0) - return 0; + /* Let the EC take over the lightbar again. */ + lb_manual_suspend_ctrl(ec_dev, 0); - /* Only instantiate this stuff if the EC has a lightbar */ - if (ec_has_lightbar(ec)) { - ec_with_lightbar = ec; - return a->mode; - } return 0; } -struct attribute_group cros_ec_lightbar_attr_group = { - .name = "lightbar", - .attrs = __lb_cmds_attrs, - .is_visible = cros_ec_lightbar_attrs_are_visible, +static int __maybe_unused cros_ec_lightbar_resume(struct device *dev) +{ + struct cros_ec_dev *ec_dev = dev_get_drvdata(dev); + + if (userspace_control) + return 0; + + return lb_send_empty_cmd(ec_dev, LIGHTBAR_CMD_RESUME); +} + +static int __maybe_unused cros_ec_lightbar_suspend(struct device *dev) +{ + struct cros_ec_dev *ec_dev = dev_get_drvdata(dev); + + if (userspace_control) + return 0; + + return lb_send_empty_cmd(ec_dev, LIGHTBAR_CMD_SUSPEND); +} + +static SIMPLE_DEV_PM_OPS(cros_ec_lightbar_pm_ops, + cros_ec_lightbar_suspend, cros_ec_lightbar_resume); + +static struct platform_driver cros_ec_lightbar_driver = { + .driver = { + .name = DRV_NAME, + .pm = &cros_ec_lightbar_pm_ops, + }, + .probe = cros_ec_lightbar_probe, + .remove = cros_ec_lightbar_remove, }; -EXPORT_SYMBOL(cros_ec_lightbar_attr_group); + +module_platform_driver(cros_ec_lightbar_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Expose the Chromebook Pixel's lightbar to userspace"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index e1b75775cd4a..14684a56e40f 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -327,7 +327,6 @@ static int cros_ec_lpc_probe(struct platform_device *pdev) static int cros_ec_lpc_remove(struct platform_device *pdev) { - struct cros_ec_device *ec_dev; struct acpi_device *adev; adev = ACPI_COMPANION(&pdev->dev); @@ -335,9 +334,6 @@ static int cros_ec_lpc_remove(struct platform_device *pdev) acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY, cros_ec_lpc_acpi_notify); - ec_dev = platform_get_drvdata(pdev); - cros_ec_remove(ec_dev); - return 0; } diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrome/cros_ec_spi.c index 2060d1483043..6cfbc2835beb 100644 --- a/drivers/platform/chrome/cros_ec_spi.c +++ b/drivers/platform/chrome/cros_ec_spi.c @@ -685,16 +685,6 @@ static int cros_ec_spi_probe(struct spi_device *spi) return 0; } -static int cros_ec_spi_remove(struct spi_device *spi) -{ - struct cros_ec_device *ec_dev; - - ec_dev = spi_get_drvdata(spi); - cros_ec_remove(ec_dev); - - return 0; -} - #ifdef CONFIG_PM_SLEEP static int cros_ec_spi_suspend(struct device *dev) { @@ -733,7 +723,6 @@ static struct spi_driver cros_ec_driver_spi = { .pm = &cros_ec_spi_pm_ops, }, .probe = cros_ec_spi_probe, - .remove = cros_ec_spi_remove, .id_table = cros_ec_spi_id, }; diff --git a/drivers/platform/chrome/cros_ec_sysfs.c b/drivers/platform/chrome/cros_ec_sysfs.c index f34a50121064..0ff5aa30c070 100644 --- a/drivers/platform/chrome/cros_ec_sysfs.c +++ b/drivers/platform/chrome/cros_ec_sysfs.c @@ -34,6 +34,8 @@ #include <linux/types.h> #include <linux/uaccess.h> +#define DRV_NAME "cros-ec-sysfs" + /* Accessor functions */ static ssize_t reboot_show(struct device *dev, @@ -353,7 +355,39 @@ struct attribute_group cros_ec_attr_group = { .attrs = __ec_attrs, .is_visible = cros_ec_ctrl_visible, }; -EXPORT_SYMBOL(cros_ec_attr_group); + +static int cros_ec_sysfs_probe(struct platform_device *pd) +{ + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); + struct device *dev = &pd->dev; + int ret; + + ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group); + if (ret < 0) + dev_err(dev, "failed to create attributes. err=%d\n", ret); + + return ret; +} + +static int cros_ec_sysfs_remove(struct platform_device *pd) +{ + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); + + sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group); + + return 0; +} + +static struct platform_driver cros_ec_sysfs_driver = { + .driver = { + .name = DRV_NAME, + }, + .probe = cros_ec_sysfs_probe, + .remove = cros_ec_sysfs_remove, +}; + +module_platform_driver(cros_ec_sysfs_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("ChromeOS EC control driver"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/platform/chrome/cros_ec_vbc.c b/drivers/platform/chrome/cros_ec_vbc.c index 5356f26bc022..af9bfe6f385c 100644 --- a/drivers/platform/chrome/cros_ec_vbc.c +++ b/drivers/platform/chrome/cros_ec_vbc.c @@ -22,8 +22,11 @@ #include <linux/platform_device.h> #include <linux/mfd/cros_ec.h> #include <linux/mfd/cros_ec_commands.h> +#include <linux/module.h> #include <linux/slab.h> +#define DRV_NAME "cros-ec-vbc" + static ssize_t vboot_context_read(struct file *filp, struct kobject *kobj, struct bin_attribute *att, char *buf, loff_t pos, size_t count) @@ -105,21 +108,6 @@ static ssize_t vboot_context_write(struct file *filp, struct kobject *kobj, return data_sz; } -static umode_t cros_ec_vbc_is_visible(struct kobject *kobj, - struct bin_attribute *a, int n) -{ - struct device *dev = container_of(kobj, struct device, kobj); - struct cros_ec_dev *ec = to_cros_ec_dev(dev); - struct device_node *np = ec->ec_dev->dev->of_node; - - if (IS_ENABLED(CONFIG_OF) && np) { - if (of_property_read_bool(np, "google,has-vbc-nvram")) - return a->attr.mode; - } - - return 0; -} - static BIN_ATTR_RW(vboot_context, 16); static struct bin_attribute *cros_ec_vbc_bin_attrs[] = { @@ -130,6 +118,43 @@ static struct bin_attribute *cros_ec_vbc_bin_attrs[] = { struct attribute_group cros_ec_vbc_attr_group = { .name = "vbc", .bin_attrs = cros_ec_vbc_bin_attrs, - .is_bin_visible = cros_ec_vbc_is_visible, }; -EXPORT_SYMBOL(cros_ec_vbc_attr_group); + +static int cros_ec_vbc_probe(struct platform_device *pd) +{ + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); + struct device *dev = &pd->dev; + int ret; + + ret = sysfs_create_group(&ec_dev->class_dev.kobj, + &cros_ec_vbc_attr_group); + if (ret < 0) + dev_err(dev, "failed to create %s attributes. err=%d\n", + cros_ec_vbc_attr_group.name, ret); + + return ret; +} + +static int cros_ec_vbc_remove(struct platform_device *pd) +{ + struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); + + sysfs_remove_group(&ec_dev->class_dev.kobj, + &cros_ec_vbc_attr_group); + + return 0; +} + +static struct platform_driver cros_ec_vbc_driver = { + .driver = { + .name = DRV_NAME, + }, + .probe = cros_ec_vbc_probe, + .remove = cros_ec_vbc_remove, +}; + +module_platform_driver(cros_ec_vbc_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Expose the vboot context nvram to userspace"); +MODULE_ALIAS("platform:" DRV_NAME); |