diff options
Diffstat (limited to 'Documentation/w1/masters')
| -rw-r--r-- | Documentation/w1/masters/ds2482.rst (renamed from Documentation/w1/masters/ds2482) | 16 | ||||
| -rw-r--r-- | Documentation/w1/masters/ds2490.rst (renamed from Documentation/w1/masters/ds2490) | 6 | ||||
| -rw-r--r-- | Documentation/w1/masters/index.rst | 14 | ||||
| -rw-r--r-- | Documentation/w1/masters/mxc-w1 | 12 | ||||
| -rw-r--r-- | Documentation/w1/masters/mxc-w1.rst | 17 | ||||
| -rw-r--r-- | Documentation/w1/masters/omap-hdq.rst (renamed from Documentation/w1/masters/omap-hdq) | 12 | ||||
| -rw-r--r-- | Documentation/w1/masters/w1-gpio.rst (renamed from Documentation/w1/masters/w1-gpio) | 21 |
7 files changed, 67 insertions, 31 deletions
diff --git a/Documentation/w1/masters/ds2482 b/Documentation/w1/masters/ds2482.rst index 56f8edace6ac..17ebe8f660cd 100644 --- a/Documentation/w1/masters/ds2482 +++ b/Documentation/w1/masters/ds2482.rst @@ -1,13 +1,19 @@ +==================== Kernel driver ds2482 ==================== Supported chips: + * Maxim DS2482-100, Maxim DS2482-800 + Prefix: 'ds2482' + Addresses scanned: None + Datasheets: - http://datasheets.maxim-ic.com/en/ds/DS2482-100.pdf - http://datasheets.maxim-ic.com/en/ds/DS2482-800.pdf + + - http://datasheets.maxim-ic.com/en/ds/DS2482-100.pdf + - http://datasheets.maxim-ic.com/en/ds/DS2482-800.pdf Author: Ben Gardner <bgardner@wabtec.com> @@ -23,9 +29,11 @@ General Remarks --------------- Valid addresses are 0x18, 0x19, 0x1a, and 0x1b. + However, the device cannot be detected without writing to the i2c bus, so no detection is done. You should instantiate the device explicitly. -$ modprobe ds2482 -$ echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-0/new_device +:: + $ modprobe ds2482 + $ echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-0/new_device diff --git a/Documentation/w1/masters/ds2490 b/Documentation/w1/masters/ds2490.rst index 3e091151dd80..7e5b50f9c0f5 100644 --- a/Documentation/w1/masters/ds2490 +++ b/Documentation/w1/masters/ds2490.rst @@ -1,7 +1,9 @@ +==================== Kernel driver ds2490 ==================== Supported chips: + * Maxim DS2490 based Author: Evgeniy Polyakov <johnpol@2ka.mipt.ru> @@ -18,6 +20,7 @@ which has 0x81 family ID integrated chip and DS2490 low-level operational chip. Notes and limitations. + - The weak pullup current is a minimum of 0.9mA and maximum of 6.0mA. - The 5V strong pullup is supported with a minimum of 5.9mA and a maximum of 30.4 mA. (From DS2490.pdf) @@ -65,4 +68,5 @@ Notes and limitations. reattaching would clear the problem. usbmon output in the guest and host did not explain the problem. My guess is a bug in either qemu or the host OS and more likely the host OS. --- 03-06-2008 David Fries <David@Fries.net> + +03-06-2008 David Fries <David@Fries.net> diff --git a/Documentation/w1/masters/index.rst b/Documentation/w1/masters/index.rst new file mode 100644 index 000000000000..4442a98850ad --- /dev/null +++ b/Documentation/w1/masters/index.rst @@ -0,0 +1,14 @@ +. SPDX-License-Identifier: GPL-2.0 + +===================== +1-wire Master Drivers +===================== + +.. toctree:: + :maxdepth: 1 + + ds2482 + ds2490 + mxc-w1 + omap-hdq + w1-gpio diff --git a/Documentation/w1/masters/mxc-w1 b/Documentation/w1/masters/mxc-w1 deleted file mode 100644 index 38be1ad65532..000000000000 --- a/Documentation/w1/masters/mxc-w1 +++ /dev/null @@ -1,12 +0,0 @@ -Kernel driver mxc_w1 -==================== - -Supported chips: - * Freescale MX27, MX31 and probably other i.MX SoCs - Datasheets: - http://www.freescale.com/files/32bit/doc/data_sheet/MCIMX31.pdf?fpsp=1 - http://cache.freescale.com/files/dsp/doc/archive/MCIMX27.pdf?fsrch=1&WT_TYPE= - Data%20Sheets&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation - -Author: Originally based on Freescale code, prepared for mainline by - Sascha Hauer <s.hauer@pengutronix.de> diff --git a/Documentation/w1/masters/mxc-w1.rst b/Documentation/w1/masters/mxc-w1.rst new file mode 100644 index 000000000000..334f9893103f --- /dev/null +++ b/Documentation/w1/masters/mxc-w1.rst @@ -0,0 +1,17 @@ +==================== +Kernel driver mxc_w1 +==================== + +Supported chips: + + * Freescale MX27, MX31 and probably other i.MX SoCs + + Datasheets: + + - http://www.freescale.com/files/32bit/doc/data_sheet/MCIMX31.pdf?fpsp=1 + - http://cache.freescale.com/files/dsp/doc/archive/MCIMX27.pdf?fsrch=1&WT_TYPE=Data%20Sheets&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation + +Author: + + Originally based on Freescale code, prepared for mainline by + Sascha Hauer <s.hauer@pengutronix.de> diff --git a/Documentation/w1/masters/omap-hdq b/Documentation/w1/masters/omap-hdq.rst index 234522709a5f..345298a59e50 100644 --- a/Documentation/w1/masters/omap-hdq +++ b/Documentation/w1/masters/omap-hdq.rst @@ -1,9 +1,10 @@ -Kernel driver for omap HDQ/1-wire module. +======================================== +Kernel driver for omap HDQ/1-wire module ======================================== Supported chips: ================ - HDQ/1-wire controller on the TI OMAP 2430/3430 platforms. +HDQ/1-wire controller on the TI OMAP 2430/3430 platforms. A useful link about HDQ basics: =============================== @@ -40,9 +41,10 @@ driver(drivers/w1/slaves/w1_bq27000.c) sets the ID to 1. Please note to load both the modules with a different ID if required, but note that the ID used should be same for both master and slave driver loading. -e.g: -insmod omap_hdq.ko W1_ID=2 -inamod w1_bq27000.ko F_ID=2 +e.g:: + + insmod omap_hdq.ko W1_ID=2 + inamod w1_bq27000.ko F_ID=2 The driver also supports 1-wire mode. In this mode, there is no need to pass slave ID as parameter. The driver will auto-detect slaves connected diff --git a/Documentation/w1/masters/w1-gpio b/Documentation/w1/masters/w1-gpio.rst index 623961d9e83f..18fdb7366372 100644 --- a/Documentation/w1/masters/w1-gpio +++ b/Documentation/w1/masters/w1-gpio.rst @@ -1,3 +1,4 @@ +===================== Kernel driver w1-gpio ===================== @@ -16,28 +17,30 @@ Documentation/devicetree/bindings/w1/w1-gpio.txt Example (mach-at91) ------------------- -#include <linux/gpio/machine.h> -#include <linux/w1-gpio.h> +:: + + #include <linux/gpio/machine.h> + #include <linux/w1-gpio.h> -static struct gpiod_lookup_table foo_w1_gpiod_table = { + static struct gpiod_lookup_table foo_w1_gpiod_table = { .dev_id = "w1-gpio", .table = { GPIO_LOOKUP_IDX("at91-gpio", AT91_PIN_PB20, NULL, 0, GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN), }, -}; + }; -static struct w1_gpio_platform_data foo_w1_gpio_pdata = { + static struct w1_gpio_platform_data foo_w1_gpio_pdata = { .ext_pullup_enable_pin = -EINVAL, -}; + }; -static struct platform_device foo_w1_device = { + static struct platform_device foo_w1_device = { .name = "w1-gpio", .id = -1, .dev.platform_data = &foo_w1_gpio_pdata, -}; + }; -... + ... at91_set_GPIO_periph(foo_w1_gpio_pdata.pin, 1); at91_set_multi_drive(foo_w1_gpio_pdata.pin, 1); gpiod_add_lookup_table(&foo_w1_gpiod_table); |