Loading Documentation/i2c/muxes/gpio-i2cmux 0 → 100644 +65 −0 Original line number Diff line number Diff line Kernel driver gpio-i2cmux Author: Peter Korsgaard <peter.korsgaard@barco.com> Description ----------- gpio-i2cmux is an i2c mux driver providing access to I2C bus segments from a master I2C bus and a hardware MUX controlled through GPIO pins. E.G.: ---------- ---------- Bus segment 1 - - - - - | | SCL/SDA | |-------------- | | | |------------| | | | | | Bus segment 2 | | | Linux | GPIO 1..N | MUX |--------------- Devices | |------------| | | | | | | | Bus segment M | | | |---------------| | ---------- ---------- - - - - - SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M according to the settings of the GPIO pins 1..N. Usage ----- gpio-i2cmux uses the platform bus, so you need to provide a struct platform_device with the platform_data pointing to a struct gpio_i2cmux_platform_data with the I2C adapter number of the master bus, the number of bus segments to create and the GPIO pins used to control it. See include/linux/gpio-i2cmux.h for details. E.G. something like this for a MUX providing 4 bus segments controlled through 3 GPIO pins: #include <linux/gpio-i2cmux.h> #include <linux/platform_device.h> static const unsigned myboard_gpiomux_gpios[] = { AT91_PIN_PC26, AT91_PIN_PC25, AT91_PIN_PC24 }; static const unsigned myboard_gpiomux_values[] = { 0, 1, 2, 3 }; static struct gpio_i2cmux_platform_data myboard_i2cmux_data = { .parent = 1, .base_nr = 2, /* optional */ .values = myboard_gpiomux_values, .n_values = ARRAY_SIZE(myboard_gpiomux_values), .gpios = myboard_gpiomux_gpios, .n_gpios = ARRAY_SIZE(myboard_gpiomux_gpios), .idle = 4, /* optional */ }; static struct platform_device myboard_i2cmux = { .name = "gpio-i2cmux", .id = 0, .dev = { .platform_data = &myboard_i2cmux_data, }, }; Documentation/kernel-parameters.txt +8 −0 Original line number Diff line number Diff line Loading @@ -403,6 +403,10 @@ and is between 256 and 4096 characters. It is defined in the file bttv.pll= See Documentation/video4linux/bttv/Insmod-options bttv.tuner= and Documentation/video4linux/bttv/CARDLIST bulk_remove=off [PPC] This parameter disables the use of the pSeries firmware feature for flushing multiple hpte entries at a time. c101= [NET] Moxa C101 synchronous serial card cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection. Loading Loading @@ -1490,6 +1494,10 @@ and is between 256 and 4096 characters. It is defined in the file mtdparts= [MTD] See drivers/mtd/cmdlinepart.c. multitce=off [PPC] This parameter disables the use of the pSeries firmware feature for updating multiple TCE entries at a time. onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration Format: [die0_boundary][,die0_lock][,die1_boundary][,die1_lock] Loading Documentation/networking/dccp.txt +1 −0 Original line number Diff line number Diff line Loading @@ -167,6 +167,7 @@ rx_ccid = 2 seq_window = 100 The initial sequence window (sec. 7.5.2) of the sender. This influences the local ackno validity and the remote seqno validity windows (7.5.1). Values in the range Wmin = 32 (RFC 4340, 7.5.2) up to 2^32-1 can be set. tx_qlen = 5 The size of the transmit buffer in packets. A value of 0 corresponds Loading Documentation/powerpc/booting-without-of.txt +2 −2 Original line number Diff line number Diff line Loading @@ -131,7 +131,7 @@ order to avoid the degeneration that had become the ppc32 kernel entry point and the way a new platform should be added to the kernel. The legacy iSeries platform breaks those rules as it predates this scheme, but no new board support will be accepted in the main tree that doesn't follows them properly. In addition, since the advent of the doesn't follow them properly. In addition, since the advent of the arch/powerpc merged architecture for ppc32 and ppc64, new 32-bit platforms and 32-bit platforms which move into arch/powerpc will be required to use these rules as well. Loading Loading @@ -1025,7 +1025,7 @@ dtc source code can be found at WARNING: This version is still in early development stage; the resulting device-tree "blobs" have not yet been validated with the kernel. The current generated bloc lacks a useful reserve map (it will kernel. The current generated block lacks a useful reserve map (it will be fixed to generate an empty one, it's up to the bootloader to fill it up) among others. The error handling needs work, bugs are lurking, etc... Loading Documentation/powerpc/dts-bindings/4xx/cpm.txt 0 → 100644 +52 −0 Original line number Diff line number Diff line PPC4xx Clock Power Management (CPM) node Required properties: - compatible : compatible list, currently only "ibm,cpm" - dcr-access-method : "native" - dcr-reg : < DCR register range > Optional properties: - er-offset : All 4xx SoCs with a CPM controller have one of two different order for the CPM registers. Some have the CPM registers in the following order (ER,FR,SR). The others have them in the following order (SR,ER,FR). For the second case set er-offset = <1>. - unused-units : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set to turn off unused devices. - idle-doze : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set to turn off unused devices. This is usually just CPM[CPU]. - standby : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set on standby and restored on resume. - suspend : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set on suspend (mem) and restored on resume. Note, for standby and suspend the corresponding bits can be different or the same. Usually for standby only class 2 and 3 units are set. However, the interface does not care. If they are the same, the additional power saving will be seeing if support is available to put the DDR in self refresh mode and any additional power saving techniques for the specific SoC. Example: CPM0: cpm { compatible = "ibm,cpm"; dcr-access-method = "native"; dcr-reg = <0x160 0x003>; er-offset = <0>; unused-units = <0x00000100>; idle-doze = <0x02000000>; standby = <0xfeff0000>; suspend = <0xfeff791d>; }; Loading
Documentation/i2c/muxes/gpio-i2cmux 0 → 100644 +65 −0 Original line number Diff line number Diff line Kernel driver gpio-i2cmux Author: Peter Korsgaard <peter.korsgaard@barco.com> Description ----------- gpio-i2cmux is an i2c mux driver providing access to I2C bus segments from a master I2C bus and a hardware MUX controlled through GPIO pins. E.G.: ---------- ---------- Bus segment 1 - - - - - | | SCL/SDA | |-------------- | | | |------------| | | | | | Bus segment 2 | | | Linux | GPIO 1..N | MUX |--------------- Devices | |------------| | | | | | | | Bus segment M | | | |---------------| | ---------- ---------- - - - - - SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M according to the settings of the GPIO pins 1..N. Usage ----- gpio-i2cmux uses the platform bus, so you need to provide a struct platform_device with the platform_data pointing to a struct gpio_i2cmux_platform_data with the I2C adapter number of the master bus, the number of bus segments to create and the GPIO pins used to control it. See include/linux/gpio-i2cmux.h for details. E.G. something like this for a MUX providing 4 bus segments controlled through 3 GPIO pins: #include <linux/gpio-i2cmux.h> #include <linux/platform_device.h> static const unsigned myboard_gpiomux_gpios[] = { AT91_PIN_PC26, AT91_PIN_PC25, AT91_PIN_PC24 }; static const unsigned myboard_gpiomux_values[] = { 0, 1, 2, 3 }; static struct gpio_i2cmux_platform_data myboard_i2cmux_data = { .parent = 1, .base_nr = 2, /* optional */ .values = myboard_gpiomux_values, .n_values = ARRAY_SIZE(myboard_gpiomux_values), .gpios = myboard_gpiomux_gpios, .n_gpios = ARRAY_SIZE(myboard_gpiomux_gpios), .idle = 4, /* optional */ }; static struct platform_device myboard_i2cmux = { .name = "gpio-i2cmux", .id = 0, .dev = { .platform_data = &myboard_i2cmux_data, }, };
Documentation/kernel-parameters.txt +8 −0 Original line number Diff line number Diff line Loading @@ -403,6 +403,10 @@ and is between 256 and 4096 characters. It is defined in the file bttv.pll= See Documentation/video4linux/bttv/Insmod-options bttv.tuner= and Documentation/video4linux/bttv/CARDLIST bulk_remove=off [PPC] This parameter disables the use of the pSeries firmware feature for flushing multiple hpte entries at a time. c101= [NET] Moxa C101 synchronous serial card cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection. Loading Loading @@ -1490,6 +1494,10 @@ and is between 256 and 4096 characters. It is defined in the file mtdparts= [MTD] See drivers/mtd/cmdlinepart.c. multitce=off [PPC] This parameter disables the use of the pSeries firmware feature for updating multiple TCE entries at a time. onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration Format: [die0_boundary][,die0_lock][,die1_boundary][,die1_lock] Loading
Documentation/networking/dccp.txt +1 −0 Original line number Diff line number Diff line Loading @@ -167,6 +167,7 @@ rx_ccid = 2 seq_window = 100 The initial sequence window (sec. 7.5.2) of the sender. This influences the local ackno validity and the remote seqno validity windows (7.5.1). Values in the range Wmin = 32 (RFC 4340, 7.5.2) up to 2^32-1 can be set. tx_qlen = 5 The size of the transmit buffer in packets. A value of 0 corresponds Loading
Documentation/powerpc/booting-without-of.txt +2 −2 Original line number Diff line number Diff line Loading @@ -131,7 +131,7 @@ order to avoid the degeneration that had become the ppc32 kernel entry point and the way a new platform should be added to the kernel. The legacy iSeries platform breaks those rules as it predates this scheme, but no new board support will be accepted in the main tree that doesn't follows them properly. In addition, since the advent of the doesn't follow them properly. In addition, since the advent of the arch/powerpc merged architecture for ppc32 and ppc64, new 32-bit platforms and 32-bit platforms which move into arch/powerpc will be required to use these rules as well. Loading Loading @@ -1025,7 +1025,7 @@ dtc source code can be found at WARNING: This version is still in early development stage; the resulting device-tree "blobs" have not yet been validated with the kernel. The current generated bloc lacks a useful reserve map (it will kernel. The current generated block lacks a useful reserve map (it will be fixed to generate an empty one, it's up to the bootloader to fill it up) among others. The error handling needs work, bugs are lurking, etc... Loading
Documentation/powerpc/dts-bindings/4xx/cpm.txt 0 → 100644 +52 −0 Original line number Diff line number Diff line PPC4xx Clock Power Management (CPM) node Required properties: - compatible : compatible list, currently only "ibm,cpm" - dcr-access-method : "native" - dcr-reg : < DCR register range > Optional properties: - er-offset : All 4xx SoCs with a CPM controller have one of two different order for the CPM registers. Some have the CPM registers in the following order (ER,FR,SR). The others have them in the following order (SR,ER,FR). For the second case set er-offset = <1>. - unused-units : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set to turn off unused devices. - idle-doze : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set to turn off unused devices. This is usually just CPM[CPU]. - standby : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set on standby and restored on resume. - suspend : specifier consist of one cell. For each bit in the cell, the corresponding bit in CPM will be set on suspend (mem) and restored on resume. Note, for standby and suspend the corresponding bits can be different or the same. Usually for standby only class 2 and 3 units are set. However, the interface does not care. If they are the same, the additional power saving will be seeing if support is available to put the DDR in self refresh mode and any additional power saving techniques for the specific SoC. Example: CPM0: cpm { compatible = "ibm,cpm"; dcr-access-method = "native"; dcr-reg = <0x160 0x003>; er-offset = <0>; unused-units = <0x00000100>; idle-doze = <0x02000000>; standby = <0xfeff0000>; suspend = <0xfeff791d>; };
