[PATCH linux v1] drivers: hwmon: Support for ASPEED PWM/Fan tach
Jaghathiswari Rankappagounder Natarajan
jaghu at google.com
Sat Feb 11 05:08:33 AEDT 2017
Hi Xo,
Please use this patch for the zaius bmc image.
On Fri, Feb 10, 2017 at 10:01 AM, Jaghathiswari Rankappagounder
Natarajan <jaghu at google.com> wrote:
> Signed-off-by: Jaghathiswari Rankappagounder Natarajan <jaghu at google.com>
> ---
> .../devicetree/bindings/hwmon/aspeed-pwm-tacho.txt | 178 ++++
> Documentation/hwmon/aspeed-pwm-tacho | 22 +
> arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts | 73 ++
> arch/arm/boot/dts/aspeed-g5.dtsi | 6 +
> drivers/hwmon/Kconfig | 11 +-
> drivers/hwmon/Makefile | 1 +
> drivers/hwmon/aspeed-pwm-tacho.c | 895 +++++++++++++++++++++
> 7 files changed, 1185 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
> create mode 100644 Documentation/hwmon/aspeed-pwm-tacho
> create mode 100644 drivers/hwmon/aspeed-pwm-tacho.c
>
> diff --git a/Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt b/Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
> new file mode 100644
> index 000000000000..290122bfe170
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
> @@ -0,0 +1,178 @@
> +ASPEED AST2400/AST2500 PWM and Fan Tacho controller device driver
> +
> +The ASPEED PWM controller can support upto 8 PWM outputs. The ASPEED Fan Tacho
> +controller can support upto 16 tachometer inputs.
> +
> +There are three different types M, N, O. These three types are just to have
> +different PWM and Fan Tach settings. Each type can have the following settings:
> + PWM related:
> + 1) PWM period
> + 2) PWM clock division high
> + 3) PWM clock division low
> + Fan Tach related:
> + 1) Fan Tach type enable
> + 2) Fan Tach clock division
> + 3) Fan Tach mode selection
> + 4) Fan Tach period
> +
> +Each PWM port should be assigned a type which can be type M, N or O.
> +
> +Each Fan Tach channel should be assigned a PWM source, which can be PWM port A
> +through H. The Fan Tach channel implicitly gets the type (M, N or O), from the
> +type assigned to its PWM source.
> +
> +Required properties for pwm-tacho node:
> +- #address-cells : should be 1.
> +
> +- #size-cells : should be 1.
> +
> +- reg : address and length of the register set for the device.
> +
> +- pinctrl-names : a pinctrl state named "default" must be defined.
> +
> +- pinctrl-0 : phandle referencing pin configuration of the AST2400/AST2500 PWM
> + ports.
> +
> +- compatible : should be "aspeed,aspeed2400-pwm-tacho" for AST2400 or
> + "aspeed,aspeed2500-pwm-tacho" for AST2500.
> +
> +- clocks : a fixed clock providing input clock frequency(PWM
> + and Fan Tach clock)
> +
> +type-values subnode format:
> +===========================
> +Under type-values subnode there can be upto 3 child nodes indicating type M/N/O
> +values. Atleast one child node is required.
> +
> +Required properties for the child node(type M/N/O):
> +- type : indicates type M/N/O. integer value in the range 0 to 2 with 0
> + indicating type M, 1 indicating type N and 2 indicating type O.
> +
> +- pwm-period : indicates type M/N/O PWM period, as per the AST2400/AST2500
> + datasheet. integer value in the range 0 to 255.
> +
> +- pwm-clock-division-l : indicates type M/N/O PWM clock division L value,
> + as per the AST2400/AST2500 datasheet.
> + integer value in the range 0 to 15.
> + 0 here indicates divide 1, 1 indicates divide 2,
> + 2 indicates divide 4, 3 indicates divide 6, and so on
> + till 15 indicates divide 30.
> +
> +- pwm-clock-division-h : indicates type M/N/O PWM clock division H value,
> + as per the AST2400/AST2500 datasheet.
> + integer value in the range 0 to 15.
> + 0 here indicates divide 1, 1 indicates divide 2,
> + 2 indicates divide 4, 3 indicates divide 8, and so on
> + till 15 indicates divide 32768.
> +
> +- fan-tach-type-enable : indicates fan tach enable of type M/N/O as per the
> + AST2400/AST2500 datasheet. boolean value.
> +
> +- fan-tach-clock-division : indicates fan tach clock division as per the
> + AST2400/AST2500 datasheet.
> + integer value in the range 0 to 7.
> + 0 indicates divide 4, 1 indicates divide 16,
> + 2 indicates divide 64, 3 indicates divide 256
> + and so on till 7 indicates divide 65536.
> +
> +- fan-tach-mode-selection : indicates fan tach mode mode selection as per the
> + AST2400/AST2500 datasheet. integer value in the
> + range 0 to 2. 0 indicates falling edge, 1 indicates
> + rising edge and 2 indicates both edges.
> +
> +- fan-tach-period : indicates fan tach period as per the AST2400/AST2500
> + datasheet. integer value (can be upto 16 bits long).
> +
> +pwm-port subnode format:
> +========================
> +Under pwm-port subnode there can upto 8 child nodes each indicating values
> +for one of the 8 PWM output ports.
> +
> +Required properties for each child node(starting from PWM A through PWM H):
> +- pwm-port : should specify PWM #X port , X ranges from A through H.
> + integer value in the range 0 to 7 with 0 indicating PWM port
> + A and 7 indicating PWM port H.
> +
> +- type : indicates type selection value of PWM port. integer value in the
> + range 0 to 2; 0 indicates type M, 1 indicates type N, 2 indicates
> + type O.
> +
> +- fan-ctrl : set the PWM duty cycle initial value. integer value between
> + 0(off) and 255(full speed).
> +
> +fan-tach-channel subnode format:
> +================================
> +Under fan-tach-channel subnode there can be upto 16 child nodes each indicating
> +values for one of the 16 fan tach channels.
> +
> +Required properties for each child node(starting from fan tach #0 through
> +fan tach #15):
> +- fan-ctrl-gpios : should specify the tachometer input GPIO pin on the hardware.
> + Fan Tachometer function can only work when GPIO is in
> + ”input mode”
> +
> +- fan-tach : should specify the fan tach channel #X, X ranges from 0 through
> + 15. integer value in the range 0 through 15.
> +
> +- pwm-source : indicates PWM source of the fan tach channel. integer value in
> + the range 0 to 7. 0 indicates PWM port A, 1 indicates PWM
> + port B and so on till 7 indicates PWM port H.
> +
> +Examples:
> +
> +pwm-tacho-fixed-clk: fixedclk {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <24000000>;
> +}
> +
> +pwm-tacho: pwm-tacho-controller at 1e786000 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + reg = <0x1E786000 0x1000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_pwm1_default>;
> + compatible = "aspeed,aspeed2500-pwm-tacho";
> + clocks = <&pwm-tacho-fixed-clk>;
> + type-values {
> + typem {
> + type = /bits/ 8 <0x00>;
> + pwm-period = /bits/ 8 <0x5F>;
> + pwm-clock-division-h = /bits/ 8 <0x00>;
> + pwm-clock-division-l = /bits/ 8 <0x05>;
> + fan-tach-type-enable;
> + fan-tach-clock-division = /bits/ 8 <0x00>;
> + fan-tach-mode-selection = /bits/ 8 <0x00>;
> + fan-tach-period = /bits/ 16 <0x1000>;
> + };
> + };
> +
> + pwm-port {
> + pwm-port0 {
> + pwm-port = /bits/ 8 <0x00>;
> + type = /bits/ 8 <0x00>;
> + fan-ctrl = /bits/ 8 <0xFF>;
> + };
> +
> + pwm-port1 {
> + pwm-port = /bits/ 8 <0x01>;
> + type = /bits/ 8 <0x00>;
> + fan-ctrl = /bits/ 8 <0xFF>;
> + };
> + };
> +
> + fan-tach-channel {
> + fan-tach0 {
> + fan-ctrl-gpios = <&gpio ASPEED_GPIO(O, 0) GPIO_ACTIVE_HIGH>;
> + fan-tach = /bits/ 8 <0x00>;
> + pwm-source = /bits/ 8 <0x00>;
> + };
> +
> + fan-tach1 {
> + fan-ctrl-gpios = <&gpio ASPEED_GPIO(O, 1) GPIO_ACTIVE_HIGH>;
> + fan-tach = /bits/ 8 <0x01>;
> + pwm-source = /bits/ 8 <0x01>;
> + };
> +
> + };
> +};
> diff --git a/Documentation/hwmon/aspeed-pwm-tacho b/Documentation/hwmon/aspeed-pwm-tacho
> new file mode 100644
> index 000000000000..0e9ec6d5f900
> --- /dev/null
> +++ b/Documentation/hwmon/aspeed-pwm-tacho
> @@ -0,0 +1,22 @@
> +Kernel driver aspeed-pwm-tacho
> +==============================
> +
> +Supported chips:
> + ASPEED AST2400/2500
> +
> +Authors:
> + <jaghu at google.com>
> +
> +Description:
> +------------
> +This driver implements support for ASPEED AST2400/2500 PWM and Fan Tacho
> +controller. The PWM controller supports upto 8 PWM outputs. The Fan tacho
> +controller supports upto 16 tachometer inputs.
> +
> +The driver provides the following sensor accesses in sysfs:
> +
> +fanX_input ro provide current fan rotation value in RPM as reported
> + by the fan to the device.
> +
> +pwmX rw get or set PWM fan control value. This is an integer
> + value between 0(off) and 255(full speed).
> diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
> index eef045b9670c..893cee348cf4 100644
> --- a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
> +++ b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
> @@ -83,6 +83,79 @@
> gpios = <&gpio ASPEED_GPIO(H, 7) GPIO_ACTIVE_LOW>;
> };
> };
> +
> + pwm_tacho: pwm-tacho-controller at 2e786000 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + reg = <0x1E786000 0x1000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_pwm1_default
> + &pinctrl_pwm2_default &pinctrl_pwm3_default>;
> + compatible = "aspeed,aspeed2500-pwm-tacho";
> + clocks = <&pwm_tacho_fixed_clk>;
> + type-values {
> + typem {
> + type = /bits/ 8 <0x00>;
> + pwm-period = /bits/ 8 <0x5F>;
> + pwm-clock-division-h = /bits/ 8 <0x00>;
> + pwm-clock-division-l = /bits/ 8 <0x05>;
> + fan-tach-type-enable;
> + fan-tach-clock-division = /bits/ 8 <0x00>;
> + fan-tach-mode-selection = /bits/ 8 <0x00>;
> + fan-tach-period = /bits/ 16 <0x1000>;
> + };
> + };
> +
> + pwm-port {
> + pwm-port0 {
> + pwm-port = /bits/ 8 <0x00>;
> + type = /bits/ 8 <0x00>;
> + fan-ctrl = /bits/ 8 <0xFF>;
> + };
> + pwm-port1 {
> + pwm-port = /bits/ 8 <0x01>;
> + type = /bits/ 8 <0x00>;
> + fan-ctrl = /bits/ 8 <0xFF>;
> + };
> + pwm-port2 {
> + pwm-port = /bits/ 8 <0x02>;
> + type = /bits/ 8 <0x00>;
> + fan-ctrl = /bits/ 8 <0xFF>;
> + };
> + pwm-port3 {
> + pwm-port = /bits/ 8 <0x03>;
> + type = /bits/ 8 <0x00>;
> + fan-ctrl = /bits/ 8 <0xFF>;
> + };
> + };
> +
> + fan-tach-channel {
> + fan-tach0 {
> + fanctrl-gpios = <&gpio
> + ASPEED_GPIO(O, 0) GPIO_ACTIVE_HIGH>;
> + fan-tach = /bits/ 8 <0x00>;
> + pwm-source = /bits/ 8 <0x00>;
> + };
> + fan-tach1 {
> + fanctrl-gpios = <&gpio
> + ASPEED_GPIO(O, 1) GPIO_ACTIVE_HIGH>;
> + fan-tach = /bits/ 8 <0x01>;
> + pwm-source = /bits/ 8 <0x01>;
> + };
> + fan-tach2 {
> + fanctrl-gpios = <&gpio
> + ASPEED_GPIO(O, 2) GPIO_ACTIVE_HIGH>;
> + fan-tach = /bits/ 8 <0x02>;
> + pwm-source = /bits/ 8 <0x02>;
> + };
> + fan-tach3 {
> + fanctrl-gpios = <&gpio
> + ASPEED_GPIO(O, 3) GPIO_ACTIVE_HIGH>;
> + fan-tach = /bits/ 8 <0x03>;
> + pwm-source = /bits/ 8 <0x03>;
> + };
> + };
> + };
> };
>
> &uart5 {
> diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
> index d72aea7ab8f2..710059ec0f78 100644
> --- a/arch/arm/boot/dts/aspeed-g5.dtsi
> +++ b/arch/arm/boot/dts/aspeed-g5.dtsi
> @@ -967,6 +967,12 @@
> reg = <0x1e6e202c 0x4>;
> };
>
> + pwm_tacho_fixed_clk: fixedclk {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <24000000>;
> + };
> +
> sram at 1e720000 {
> compatible = "mmio-sram";
> reg = <0x1e720000 0x9000>; // 36K
> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
> index d4de8d5aeed4..8a249a95c1b4 100644
> --- a/drivers/hwmon/Kconfig
> +++ b/drivers/hwmon/Kconfig
> @@ -341,6 +341,15 @@ config SENSORS_ASB100
> This driver can also be built as a module. If so, the module
> will be called asb100.
>
> +config SENSORS_ASPEED
> + tristate "ASPEED AST2400/AST2500 PWM and Fan tach driver"
> + help
> + This driver provides support for ASPEED AST2400/AST2500 PWM
> + and Fan Tacho controllers.
> +
> + This driver can also be built as a module. If so, the module
> + will be called aspeed_pwm_tacho.
> +
> config SENSORS_ATXP1
> tristate "Attansic ATXP1 VID controller"
> depends on I2C
> @@ -1505,7 +1514,7 @@ config SENSORS_ADS7871
>
> config SENSORS_AMC6821
> tristate "Texas Instruments AMC6821"
> - depends on I2C
> + depends on I2C
> help
> If you say yes here you get support for the Texas Instruments
> AMC6821 hardware monitoring chips.
> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
> index 4455478e9e7a..9d2e643bc985 100644
> --- a/drivers/hwmon/Makefile
> +++ b/drivers/hwmon/Makefile
> @@ -46,6 +46,7 @@ obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o
> obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o
> obj-$(CONFIG_SENSORS_ARM_SCPI) += scpi-hwmon.o
> obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o
> +obj-$(CONFIG_SENSORS_ASPEED) += aspeed-pwm-tacho.o
> obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o
> obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o
> obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o
> diff --git a/drivers/hwmon/aspeed-pwm-tacho.c b/drivers/hwmon/aspeed-pwm-tacho.c
> new file mode 100644
> index 000000000000..21ed91a9dc2e
> --- /dev/null
> +++ b/drivers/hwmon/aspeed-pwm-tacho.c
> @@ -0,0 +1,895 @@
> +/*
> + * Copyright (c) 2016 Google, Inc
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 or later as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/delay.h>
> +#include <linux/hwmon.h>
> +#include <linux/hwmon-sysfs.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/sysfs.h>
> +#include <linux/regmap.h>
> +
> +/* ASPEED PWM & FAN Tach Register Definition */
> +#define ASPEED_PTCR_CTRL 0x00
> +#define ASPEED_PTCR_CLK_CTRL 0x04
> +#define ASPEED_PTCR_DUTY0_CTRL 0x08
> +#define ASPEED_PTCR_DUTY1_CTRL 0x0c
> +#define ASPEED_PTCR_TYPEM_CTRL 0x10
> +#define ASPEED_PTCR_TYPEM_CTRL1 0x14
> +#define ASPEED_PTCR_TYPEN_CTRL 0x18
> +#define ASPEED_PTCR_TYPEN_CTRL1 0x1c
> +#define ASPEED_PTCR_TACH_SOURCE 0x20
> +#define ASPEED_PTCR_TRIGGER 0x28
> +#define ASPEED_PTCR_RESULT 0x2c
> +#define ASPEED_PTCR_INTR_CTRL 0x30
> +#define ASPEED_PTCR_INTR_STS 0x34
> +#define ASPEED_PTCR_TYPEM_LIMIT 0x38
> +#define ASPEED_PTCR_TYPEN_LIMIT 0x3C
> +#define ASPEED_PTCR_CTRL_EXT 0x40
> +#define ASPEED_PTCR_CLK_CTRL_EXT 0x44
> +#define ASPEED_PTCR_DUTY2_CTRL 0x48
> +#define ASPEED_PTCR_DUTY3_CTRL 0x4c
> +#define ASPEED_PTCR_TYPEO_CTRL 0x50
> +#define ASPEED_PTCR_TYPEO_CTRL1 0x54
> +#define ASPEED_PTCR_TACH_SOURCE_EXT 0x60
> +#define ASPEED_PTCR_TYPEO_LIMIT 0x78
> +
> +/* ASPEED_PTCR_CTRL : 0x00 - General Control Register */
> +#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1 15
> +#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2 6
> +#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK (BIT(7) | BIT(15))
> +
> +#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1 14
> +#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2 5
> +#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK (BIT(6) | BIT(14))
> +
> +#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1 13
> +#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2 4
> +#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK (BIT(5) | BIT(13))
> +
> +#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1 12
> +#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2 3
> +#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK (BIT(4) | BIT(12))
> +
> +#define ASPEED_PTCR_CTRL_FAN_NUM_EN(x) BIT(16 + x)
> +
> +#define ASPEED_PTCR_CTRL_PWMD_EN BIT(11)
> +#define ASPEED_PTCR_CTRL_PWMC_EN BIT(10)
> +#define ASPEED_PTCR_CTRL_PWMB_EN BIT(9)
> +#define ASPEED_PTCR_CTRL_PWMA_EN BIT(8)
> +
> +#define ASPEED_PTCR_CTRL_CLK_SRC BIT(1)
> +#define ASPEED_PTCR_CTRL_CLK_EN BIT(0)
> +
> +/* ASPEED_PTCR_CLK_CTRL : 0x04 - Clock Control Register */
> +/* TYPE N */
> +#define ASPEED_PTCR_CLK_CTRL_TYPEN_MASK GENMASK(31, 16)
> +#define ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT 24
> +#define ASPEED_PTCR_CLK_CTRL_TYPEN_H 20
> +#define ASPEED_PTCR_CLK_CTRL_TYPEN_L 16
> +/* TYPE M */
> +#define ASPEED_PTCR_CLK_CTRL_TYPEM_MASK GENMASK(15, 0)
> +#define ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT 8
> +#define ASPEED_PTCR_CLK_CTRL_TYPEM_H 4
> +#define ASPEED_PTCR_CLK_CTRL_TYPEM_L 0
> +
> +/*
> + * ASPEED_PTCR_DUTY_CTRL/1/2/3 : 0x08/0x0C/0x48/0x4C - PWM-FAN duty control
> + * 0/1/2/3 register
> + */
> +#define DUTY_CTRL_PWM2_FALL_POINT 24
> +#define DUTY_CTRL_PWM2_RISE_POINT 16
> +#define DUTY_CTRL_PWM2_RISE_FALL_MASK GENMASK(31, 16)
> +#define DUTY_CTRL_PWM1_FALL_POINT 8
> +#define DUTY_CTRL_PWM1_RISE_POINT 0
> +#define DUTY_CTRL_PWM1_RISE_FALL_MASK GENMASK(15, 0)
> +
> +/* ASPEED_PTCR_TYPEM_CTRL : 0x10/0x18/0x50 - Type M/N/O Ctrl 0 Register */
> +#define TYPE_CTRL_FAN_MASK (GENMASK(5, 1) | GENMASK(31, 16))
> +#define TYPE_CTRL_FAN1_MASK GENMASK(31, 0)
> +#define TYPE_CTRL_FAN_PERIOD 16
> +#define TYPE_CTRL_FAN_MODE 4
> +#define TYPE_CTRL_FAN_DIVISION 1
> +#define TYPE_CTRL_FAN_TYPE_EN 1
> +
> +/* ASPEED_PTCR_TACH_SOURCE : 0x20/0x60 - Tach Source Register */
> +/* bit [0,1] at 0x20, bit [2] at 0x60 */
> +#define TACH_PWM_SOURCE_BIT01(x) (x * 2)
> +#define TACH_PWM_SOURCE_BIT2(x) (x * 2)
> +#define TACH_PWM_SOURCE_MASK_BIT01(x) (0x3 << (x * 2))
> +#define TACH_PWM_SOURCE_MASK_BIT2(x) BIT(x * 2)
> +
> +/* ASPEED_PTCR_RESULT : 0x2c - Result Register */
> +#define RESULT_STATUS_MASK BIT(31)
> +#define RESULT_VALUE_MASK 0xfffff
> +
> +/* ASPEED_PTCR_CTRL_EXT : 0x40 - General Control Extension #1 Register */
> +#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1 15
> +#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2 6
> +#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK (BIT(7) | BIT(15))
> +
> +#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1 14
> +#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2 5
> +#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK (BIT(6) | BIT(14))
> +
> +#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1 13
> +#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2 4
> +#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK (BIT(5) | BIT(13))
> +
> +#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1 12
> +#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2 3
> +#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK (BIT(4) | BIT(12))
> +
> +#define ASPEED_PTCR_CTRL_PWMH_EN BIT(11)
> +#define ASPEED_PTCR_CTRL_PWMG_EN BIT(10)
> +#define ASPEED_PTCR_CTRL_PWMF_EN BIT(9)
> +#define ASPEED_PTCR_CTRL_PWME_EN BIT(8)
> +
> +/* ASPEED_PTCR_CLK_EXT_CTRL : 0x44 - Clock Control Extension #1 Register */
> +/* TYPE O */
> +#define ASPEED_PTCR_CLK_CTRL_TYPEO_MASK GENMASK(15, 0)
> +#define ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT 8
> +#define ASPEED_PTCR_CLK_CTRL_TYPEO_H 4
> +#define ASPEED_PTCR_CLK_CTRL_TYPEO_L 0
> +
> +#define PWM_MAX 255
> +
> +struct aspeed_pwm_tacho_regmap {
> + void __iomem *regs;
> +};
> +
> +struct aspeed_pwm_tacho_data {
> + struct regmap *regmap;
> + unsigned long clk_freq;
> + bool pwm_present[8];
> + bool fan_present[16];
> + u8 type_pwm_clock_unit[3];
> + u8 type_pwm_clock_division_h[3];
> + u8 type_pwm_clock_division_l[3];
> + u8 type_fan_tach_clock_division[3];
> + u16 type_fan_tach_unit[3];
> + u8 pwm_port_type[8];
> + u8 pwm_port_fan_ctrl[8];
> + u8 fan_tach_ch_source[16];
> + const struct attribute_group *groups[2];
> +};
> +
> +enum type { TYPEM, TYPEN, TYPEO };
> +
> +struct type_params {
> + u32 l_value;
> + u32 h_value;
> + u32 unit_value;
> + u32 clk_ctrl_mask;
> + u32 clk_ctrl_reg;
> + u32 ctrl_reg;
> + u32 ctrl_reg1;
> +};
> +
> +static const struct type_params type_params[] = {
> + [TYPEM] = {
> + .l_value = ASPEED_PTCR_CLK_CTRL_TYPEM_L,
> + .h_value = ASPEED_PTCR_CLK_CTRL_TYPEM_H,
> + .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT,
> + .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEM_MASK,
> + .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
> + .ctrl_reg = ASPEED_PTCR_TYPEM_CTRL,
> + .ctrl_reg1 = ASPEED_PTCR_TYPEM_CTRL1,
> + },
> + [TYPEN] = {
> + .l_value = ASPEED_PTCR_CLK_CTRL_TYPEN_L,
> + .h_value = ASPEED_PTCR_CLK_CTRL_TYPEN_H,
> + .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT,
> + .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEN_MASK,
> + .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
> + .ctrl_reg = ASPEED_PTCR_TYPEN_CTRL,
> + .ctrl_reg1 = ASPEED_PTCR_TYPEN_CTRL1,
> + },
> + [TYPEO] = {
> + .l_value = ASPEED_PTCR_CLK_CTRL_TYPEO_L,
> + .h_value = ASPEED_PTCR_CLK_CTRL_TYPEO_H,
> + .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT,
> + .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEO_MASK,
> + .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL_EXT,
> + .ctrl_reg = ASPEED_PTCR_TYPEO_CTRL,
> + .ctrl_reg1 = ASPEED_PTCR_TYPEO_CTRL1,
> + }
> +};
> +
> +enum pwm_port { PWMA, PWMB, PWMC, PWMD, PWME, PWMF, PWMG, PWMH };
> +
> +struct pwm_port_params {
> + u32 pwm_en;
> + u32 ctrl_reg;
> + u32 type_part1;
> + u32 type_part2;
> + u32 type_mask;
> + u32 duty_ctrl_rise_point;
> + u32 duty_ctrl_fall_point;
> + u32 duty_ctrl_reg;
> + u32 duty_ctrl_rise_fall_mask;
> +};
> +
> +static const struct pwm_port_params pwm_port_params[] = {
> + [PWMA] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMA_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
> + },
> + [PWMB] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMB_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
> + },
> + [PWMC] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMC_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
> + },
> + [PWMD] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMD_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
> + },
> + [PWME] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWME_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
> + },
> + [PWMF] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMF_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
> + },
> + [PWMG] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMG_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
> + },
> + [PWMH] = {
> + .pwm_en = ASPEED_PTCR_CTRL_PWMH_EN,
> + .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
> + .type_part1 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1,
> + .type_part2 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2,
> + .type_mask = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK,
> + .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
> + .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
> + .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
> + .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
> + }
> +};
> +
> +static int regmap_aspeed_pwm_tacho_reg_write(void *context, unsigned int reg,
> + unsigned int val)
> +{
> + struct aspeed_pwm_tacho_regmap *hregmap = context;
> +
> + writel(val, hregmap->regs + reg);
> + return 0;
> +}
> +
> +static int regmap_aspeed_pwm_tacho_reg_read(void *context, unsigned int reg,
> + unsigned int *val)
> +{
> + struct aspeed_pwm_tacho_regmap *hregmap = context;
> +
> + *val = readl(hregmap->regs + reg);
> + return 0;
> +}
> +
> +static const struct regmap_config aspeed_pwm_tacho_regmap_config = {
> + .reg_bits = 32,
> + .val_bits = 32,
> + .reg_stride = 4,
> + .max_register = ASPEED_PTCR_TYPEO_LIMIT,
> + .reg_write = regmap_aspeed_pwm_tacho_reg_write,
> + .reg_read = regmap_aspeed_pwm_tacho_reg_read,
> + .fast_io = true,
> +};
> +
> +static void aspeed_set_clock_enable(struct regmap *regmap, bool val)
> +{
> + regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
> + ASPEED_PTCR_CTRL_CLK_EN,
> + val ? ASPEED_PTCR_CTRL_CLK_EN : 0);
> +}
> +
> +static void aspeed_set_clock_source(struct regmap *regmap, int val)
> +{
> + regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
> + ASPEED_PTCR_CTRL_CLK_SRC,
> + val ? ASPEED_PTCR_CTRL_CLK_SRC : 0);
> +}
> +
> +static void aspeed_set_pwm_clock_values(struct regmap *regmap, u8 type,
> + u8 div_high, u8 div_low, u8 unit)
> +{
> +
> + u32 reg_value = ((div_high << type_params[type].h_value) |
> + (div_low << type_params[type].l_value) |
> + (unit << type_params[type].unit_value));
> +
> + regmap_update_bits(regmap, type_params[type].clk_ctrl_reg,
> + type_params[type].clk_ctrl_mask, reg_value);
> +}
> +
> +static void aspeed_set_pwm_port_enable(struct regmap *regmap, u8 pwm_port,
> + bool enable)
> +{
> + regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
> + pwm_port_params[pwm_port].pwm_en,
> + enable ? pwm_port_params[pwm_port].pwm_en : 0);
> +}
> +
> +static void aspeed_set_pwm_port_type(struct regmap *regmap,
> + u8 pwm_port, u8 type)
> +{
> + u32 reg_value = (type & 0x1) << pwm_port_params[pwm_port].type_part1;
> +
> + reg_value |= (type & 0x2) << pwm_port_params[pwm_port].type_part2;
> +
> + regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
> + pwm_port_params[pwm_port].type_mask, reg_value);
> +}
> +
> +static void aspeed_set_pwm_port_duty_rising_falling(struct regmap *regmap,
> + u8 pwm_port, u8 rising,
> + u8 falling)
> +{
> + u32 reg_value = (rising <<
> + pwm_port_params[pwm_port].duty_ctrl_rise_point);
> + reg_value |= (falling <<
> + pwm_port_params[pwm_port].duty_ctrl_fall_point);
> +
> + regmap_update_bits(regmap, pwm_port_params[pwm_port].duty_ctrl_reg,
> + pwm_port_params[pwm_port].duty_ctrl_rise_fall_mask,
> + reg_value);
> +}
> +
> +static void aspeed_set_tacho_type_enable(struct regmap *regmap, u8 type,
> + bool enable)
> +{
> + regmap_update_bits(regmap, type_params[type].ctrl_reg,
> + TYPE_CTRL_FAN_TYPE_EN,
> + enable ? TYPE_CTRL_FAN_TYPE_EN : 0);
> +}
> +
> +static void aspeed_set_tacho_type_values(struct regmap *regmap, u8 type,
> + u8 mode, u16 unit, u8 division)
> +{
> + u32 reg_value = ((mode << TYPE_CTRL_FAN_MODE) |
> + (unit << TYPE_CTRL_FAN_PERIOD) |
> + (division << TYPE_CTRL_FAN_DIVISION));
> +
> + regmap_update_bits(regmap, type_params[type].ctrl_reg,
> + TYPE_CTRL_FAN_MASK, reg_value);
> + regmap_update_bits(regmap, type_params[type].ctrl_reg1,
> + TYPE_CTRL_FAN1_MASK, unit << 16);
> +}
> +
> +static void aspeed_set_fan_tach_ch_enable(struct regmap *regmap, u8 fan_tach_ch,
> + bool enable)
> +{
> + regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
> + ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch),
> + enable ?
> + ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch) : 0);
> +}
> +
> +static void aspeed_set_fan_tach_ch_source(struct regmap *regmap, u8 fan_tach_ch,
> + u8 fan_tach_ch_source)
> +{
> + u32 reg_value1 = ((fan_tach_ch_source & 0x3) <<
> + TACH_PWM_SOURCE_BIT01(fan_tach_ch));
> + u32 reg_value2 = (((fan_tach_ch_source & 0x4) >> 2) <<
> + TACH_PWM_SOURCE_BIT2(fan_tach_ch));
> +
> + regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE,
> + TACH_PWM_SOURCE_MASK_BIT01(fan_tach_ch),
> + reg_value1);
> +
> + regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE_EXT,
> + TACH_PWM_SOURCE_MASK_BIT2(fan_tach_ch),
> + reg_value2);
> +}
> +
> +static void aspeed_set_pwm_port_fan_ctrl(struct aspeed_pwm_tacho_data *priv,
> + u8 index, u8 fan_ctrl)
> +{
> + u16 period, dc_time_on;
> +
> + period = priv->type_pwm_clock_unit[priv->pwm_port_type[index]];
> + period += 1;
> + dc_time_on = (fan_ctrl * period) / PWM_MAX;
> +
> + if (dc_time_on == 0) {
> + aspeed_set_pwm_port_enable(priv->regmap, index, false);
> + } else {
> + if (dc_time_on == period)
> + dc_time_on = 0;
> +
> + aspeed_set_pwm_port_duty_rising_falling(priv->regmap, index, 0,
> + dc_time_on);
> + aspeed_set_pwm_port_enable(priv->regmap, index, true);
> + }
> +}
> +
> +static u32 aspeed_get_fan_tach_ch_measure_period(struct aspeed_pwm_tacho_data
> + *priv, u8 type)
> +{
> + u32 clk;
> + u16 tacho_unit;
> + u8 clk_unit, div_h, div_l, tacho_div;
> +
> + clk = priv->clk_freq;
> + clk_unit = priv->type_pwm_clock_unit[type];
> + div_h = priv->type_pwm_clock_division_h[type];
> + div_h = 0x1 << div_h;
> + div_l = priv->type_pwm_clock_division_l[type];
> + if (div_l == 0)
> + div_l = 1;
> + else
> + div_l = div_l * 2;
> +
> + tacho_unit = priv->type_fan_tach_unit[type];
> + tacho_div = priv->type_fan_tach_clock_division[type];
> +
> + tacho_div = 0x4 << (tacho_div * 2);
> + return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit);
> +}
> +
> +static u32 aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
> + u8 fan_tach_ch)
> +{
> + u32 raw_data, rpm, tach_div, clk_source, timeout = 0, sec, val;
> + u8 fan_tach_ch_source, type;
> +
> + regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
> + regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
> +
> + fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
> + type = priv->pwm_port_type[fan_tach_ch_source];
> +
> + sec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type));
> +
> + msleep(sec);
> +
> + regmap_read(priv->regmap, ASPEED_PTCR_RESULT, &val);
> + while (!(val & RESULT_STATUS_MASK)) {
> + timeout++;
> + if (timeout > 1)
> + return 0;
> + msleep(sec);
> + }
> +
> + regmap_read(priv->regmap, ASPEED_PTCR_RESULT, &val);
> + raw_data = val & RESULT_VALUE_MASK;
> + tach_div = priv->type_fan_tach_clock_division[type];
> +
> + tach_div = 0x4 << (tach_div * 2);
> + clk_source = priv->clk_freq;
> +
> + if (raw_data == 0)
> + return 0;
> + else
> + return (clk_source * 60) / (2 * raw_data * tach_div);
> +}
> +
> +static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
> + int index = sensor_attr->index;
> + int ret;
> + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
> + long fan_ctrl;
> + u32 val;
> + int i;
> +
> + ret = kstrtol(buf, 10, &fan_ctrl);
> + if (ret != 0)
> + return ret;
> +
> + if (fan_ctrl < 0 || fan_ctrl > PWM_MAX)
> + return -EINVAL;
> +
> + if (priv->pwm_port_fan_ctrl[index] == fan_ctrl)
> + return count;
> +
> + priv->pwm_port_fan_ctrl[index] = fan_ctrl;
> + aspeed_set_pwm_port_fan_ctrl(priv, index, fan_ctrl);
> +
> + return count;
> +}
> +
> +static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
> + char *buf)
> +{
> + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
> + int index = sensor_attr->index;
> + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
> +
> + return sprintf(buf, "%u\n", priv->pwm_port_fan_ctrl[index]);
> +}
> +
> +static ssize_t show_rpm(struct device *dev, struct device_attribute *attr,
> + char *buf)
> +{
> + struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
> + int index = sensor_attr->index;
> + u32 rpm;
> + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
> +
> + rpm = aspeed_get_fan_tach_ch_rpm(priv, index);
> +
> + return sprintf(buf, "%u\n", rpm);
> +}
> +
> +static umode_t pwm_is_visible(struct kobject *kobj,
> + struct attribute *a, int index)
> +{
> + struct device *dev = container_of(kobj, struct device, kobj);
> + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
> +
> + if (!priv->pwm_present[index])
> + return 0;
> + return a->mode;
> +}
> +
> +static umode_t fan_dev_is_visible(struct kobject *kobj,
> + struct attribute *a, int index)
> +{
> + struct device *dev = container_of(kobj, struct device, kobj);
> + struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
> +
> + if (!priv->fan_present[index])
> + return 0;
> + return a->mode;
> +}
> +
> +static SENSOR_DEVICE_ATTR(pwm0, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 0);
> +static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 1);
> +static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 2);
> +static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 3);
> +static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 4);
> +static SENSOR_DEVICE_ATTR(pwm5, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 5);
> +static SENSOR_DEVICE_ATTR(pwm6, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 6);
> +static SENSOR_DEVICE_ATTR(pwm7, S_IRUGO | S_IWUSR,
> + show_pwm, set_pwm, 7);
> +
> +static struct attribute *pwm_dev_attrs[] = {
> + &sensor_dev_attr_pwm0.dev_attr.attr,
> + &sensor_dev_attr_pwm1.dev_attr.attr,
> + &sensor_dev_attr_pwm2.dev_attr.attr,
> + &sensor_dev_attr_pwm3.dev_attr.attr,
> + &sensor_dev_attr_pwm4.dev_attr.attr,
> + &sensor_dev_attr_pwm5.dev_attr.attr,
> + &sensor_dev_attr_pwm6.dev_attr.attr,
> + &sensor_dev_attr_pwm7.dev_attr.attr,
> + NULL,
> +};
> +
> +static const struct attribute_group pwm_dev_group = {
> + .attrs = pwm_dev_attrs,
> + .is_visible = pwm_is_visible,
> +};
> +
> +static SENSOR_DEVICE_ATTR(fan0_input, S_IRUGO,
> + show_rpm, NULL, 0);
> +static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO,
> + show_rpm, NULL, 1);
> +static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO,
> + show_rpm, NULL, 2);
> +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO,
> + show_rpm, NULL, 3);
> +static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO,
> + show_rpm, NULL, 4);
> +static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO,
> + show_rpm, NULL, 5);
> +static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO,
> + show_rpm, NULL, 6);
> +static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO,
> + show_rpm, NULL, 7);
> +static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO,
> + show_rpm, NULL, 8);
> +static SENSOR_DEVICE_ATTR(fan9_input, S_IRUGO,
> + show_rpm, NULL, 9);
> +static SENSOR_DEVICE_ATTR(fan10_input, S_IRUGO,
> + show_rpm, NULL, 10);
> +static SENSOR_DEVICE_ATTR(fan11_input, S_IRUGO,
> + show_rpm, NULL, 11);
> +static SENSOR_DEVICE_ATTR(fan12_input, S_IRUGO,
> + show_rpm, NULL, 12);
> +static SENSOR_DEVICE_ATTR(fan13_input, S_IRUGO,
> + show_rpm, NULL, 13);
> +static SENSOR_DEVICE_ATTR(fan14_input, S_IRUGO,
> + show_rpm, NULL, 14);
> +static SENSOR_DEVICE_ATTR(fan15_input, S_IRUGO,
> + show_rpm, NULL, 15);
> +
> +static struct attribute *fan_dev_attrs[] = {
> + &sensor_dev_attr_fan0_input.dev_attr.attr,
> + &sensor_dev_attr_fan1_input.dev_attr.attr,
> + &sensor_dev_attr_fan2_input.dev_attr.attr,
> + &sensor_dev_attr_fan3_input.dev_attr.attr,
> + &sensor_dev_attr_fan4_input.dev_attr.attr,
> + &sensor_dev_attr_fan5_input.dev_attr.attr,
> + &sensor_dev_attr_fan6_input.dev_attr.attr,
> + &sensor_dev_attr_fan7_input.dev_attr.attr,
> + &sensor_dev_attr_fan8_input.dev_attr.attr,
> + &sensor_dev_attr_fan9_input.dev_attr.attr,
> + &sensor_dev_attr_fan10_input.dev_attr.attr,
> + &sensor_dev_attr_fan11_input.dev_attr.attr,
> + &sensor_dev_attr_fan12_input.dev_attr.attr,
> + &sensor_dev_attr_fan13_input.dev_attr.attr,
> + &sensor_dev_attr_fan14_input.dev_attr.attr,
> + &sensor_dev_attr_fan15_input.dev_attr.attr,
> + NULL
> +};
> +
> +static const struct attribute_group fan_dev_group = {
> + .attrs = fan_dev_attrs,
> + .is_visible = fan_dev_is_visible,
> +};
> +
> +/*
> + * If the clock type is type M then :
> + * The PWM frequency = 24MHz / (type M clock division L bit *
> + * type M clock division H bit * (type M PWM period bit + 1))
> + */
> +static int aspeed_create_type(struct device_node *child,
> + struct aspeed_pwm_tacho_data *priv)
> +{
> + u8 period, div_l, div_h, type, mode, div;
> + bool enable;
> + u16 unit;
> + int err;
> +
> + err = of_property_read_u8(child, "type", &type);
> + if (err)
> + return err;
> + err = of_property_read_u8(child, "pwm-period", &period);
> + if (err)
> + return err;
> + err = of_property_read_u8(child, "pwm-clock-division-h", &div_h);
> + if (err)
> + return err;
> + err = of_property_read_u8(child, "pwm-clock-division-l", &div_l);
> + if (err)
> + return err;
> + priv->type_pwm_clock_division_h[type] = div_h;
> + priv->type_pwm_clock_division_l[type] = div_l;
> + priv->type_pwm_clock_unit[type] = period;
> + aspeed_set_pwm_clock_values(priv->regmap, type, div_h, div_l, period);
> +
> + enable = of_property_read_bool(child, "fan-tach-type-enable");
> + if (!enable)
> + return -EINVAL;
> + aspeed_set_tacho_type_enable(priv->regmap, type, enable);
> +
> + err = of_property_read_u8(child, "fan-tach-clock-division", &div);
> + if (err)
> + return err;
> + priv->type_fan_tach_clock_division[type] = div;
> +
> + err = of_property_read_u8(child, "fan-tach-mode-selection", &mode);
> + if (err)
> + return err;
> +
> + err = of_property_read_u16(child, "fan-tach-period", &unit);
> + if (err)
> + return err;
> + priv->type_fan_tach_unit[type] = unit;
> + aspeed_set_tacho_type_values(priv->regmap, type, mode, unit, div);
> +
> + return 0;
> +}
> +
> +static int aspeed_create_pwm_port(struct device_node *child,
> + struct aspeed_pwm_tacho_data *priv)
> +{
> + u8 val, index;
> + int err;
> +
> + err = of_property_read_u8(child, "pwm-port", &val);
> + if (err)
> + return err;
> + aspeed_set_pwm_port_enable(priv->regmap, val, true);
> + priv->pwm_present[val] = true;
> + index = val;
> +
> + err = of_property_read_u8(child, "type", &val);
> + if (err)
> + return err;
> + priv->pwm_port_type[index] = val;
> + aspeed_set_pwm_port_type(priv->regmap, index, val);
> +
> + err = of_property_read_u8(child, "fan-ctrl", &val);
> + if (err)
> + return err;
> + priv->pwm_port_fan_ctrl[index] = val;
> + aspeed_set_pwm_port_fan_ctrl(priv, index, val);
> +
> + return 0;
> +}
> +
> +static int aspeed_create_fan_tach_channel(struct device *dev,
> + struct device_node *child,
> + struct aspeed_pwm_tacho_data *priv)
> +{
> + u8 val, index;
> + int err;
> + struct gpio_desc *fan_ctrl = devm_gpiod_get(dev, "fanctrl", GPIOD_IN);
> +
> + err = of_property_read_u8(child, "fan-tach", &val);
> + if (err)
> + return err;
> + aspeed_set_fan_tach_ch_enable(priv->regmap, val, true);
> + index = val;
> + priv->fan_present[index] = true;
> + err = of_property_read_u8(child, "pwm-source", &val);
> + if (err)
> + return err;
> + priv->fan_tach_ch_source[index] = val;
> + aspeed_set_fan_tach_ch_source(priv->regmap, index, val);
> +
> + return 0;
> +}
> +
> +static int aspeed_pwm_tacho_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct device_node *np, *type_np, *pwm_np, *fan_tach_np, *child;
> + struct aspeed_pwm_tacho_data *priv;
> + struct aspeed_pwm_tacho_regmap *hregmap;
> + struct resource *res;
> + struct device *hwmon;
> + struct clk *clk;
> + u32 *val;
> + int ret;
> + unsigned int i;
> +
> + np = dev->of_node;
> +
> + hregmap = devm_kzalloc(dev, sizeof(*hregmap), GFP_KERNEL);
> + if (!hregmap)
> + return -ENOMEM;
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -ENOENT;
> + hregmap->regs = devm_ioremap_resource(dev, res);
> + if (IS_ERR(hregmap->regs))
> + return PTR_ERR(hregmap->regs);
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> + priv->regmap = devm_regmap_init(dev, NULL, hregmap,
> + &aspeed_pwm_tacho_regmap_config);
> + if (IS_ERR(priv->regmap))
> + return PTR_ERR(priv->regmap);
> + regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE, 0);
> + regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE_EXT, 0);
> +
> + clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(clk))
> + return -ENODEV;
> + priv->clk_freq = clk_get_rate(clk);
> + aspeed_set_clock_enable(priv->regmap, true);
> + aspeed_set_clock_source(priv->regmap, 0);
> + type_np = of_get_child_by_name(np, "type-values");
> + if (!type_np)
> + return -EINVAL;
> + for_each_child_of_node(type_np, child) {
> + ret = aspeed_create_type(child, priv);
> + if (ret)
> + return ret;
> + }
> + of_node_put(type_np);
> + pwm_np = of_get_child_by_name(np, "pwm-port");
> + if (!pwm_np)
> + return -EINVAL;
> + for_each_child_of_node(pwm_np, child) {
> + ret = aspeed_create_pwm_port(child, priv);
> + if (ret)
> + return ret;
> + }
> + of_node_put(pwm_np);
> + fan_tach_np = of_get_child_by_name(np, "fan-tach-channel");
> + if (!fan_tach_np)
> + return -EINVAL;
> + for_each_child_of_node(fan_tach_np, child) {
> + ret = aspeed_create_fan_tach_channel(dev, child, priv);
> + if (ret)
> + return ret;
> + }
> + of_node_put(fan_tach_np);
> + of_node_put(np);
> + priv->groups[0] = &pwm_dev_group;
> + priv->groups[1] = &fan_dev_group;
> + hwmon = devm_hwmon_device_register_with_groups(dev,
> + "aspeed_pwm_tacho",
> + priv, priv->groups);
> +
> + return PTR_ERR_OR_ZERO(hwmon);
> +}
> +
> +static const struct of_device_id of_pwm_tacho_match_table[] = {
> + { .compatible = "aspeed,aspeed2400-pwm-tacho", },
> + { .compatible = "aspeed,aspeed2500-pwm-tacho", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, of_pwm_tacho_match_table);
> +
> +static struct platform_driver aspeed_pwm_tacho_driver = {
> + .probe = aspeed_pwm_tacho_probe,
> + .driver = {
> + .name = "aspeed_pwm_tacho",
> + .of_match_table = of_pwm_tacho_match_table,
> + },
> +};
> +
> +module_platform_driver(aspeed_pwm_tacho_driver);
> +
> +MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu at google.com>");
> +MODULE_DESCRIPTION("ASPEED PWM and Fan Tacho device driver");
> +MODULE_LICENSE("GPL");
> --
> 2.11.0.483.g087da7b7c-goog
>
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