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Date: Tue, 13 Dec 2016 10:29:51 +0100
From: Benjamin Gaignard <benjamin.gaignard@...aro.org>
To: Rob Herring <robh@...nel.org>
Cc: Lee Jones <lee.jones@...aro.org>,
Mark Rutland <mark.rutland@....com>, alexandre.torgue@...com,
devicetree@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Thierry Reding <thierry.reding@...il.com>,
linux-pwm@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
knaack.h@....de, Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
linux-iio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Fabrice Gasnier <fabrice.gasnier@...com>,
Gerald Baeza <gerald.baeza@...com>,
Arnaud Pouliquen <arnaud.pouliquen@...com>,
Linus Walleij <linus.walleij@...aro.org>,
Linaro Kernel Mailman List <linaro-kernel@...ts.linaro.org>,
Benjamin Gaignard <benjamin.gaignard@...com>
Subject: Re: [PATCH v6 7/8] ARM: dts: stm32: add Timers driver for stm32f429 MCU
2016-12-12 19:59 GMT+01:00 Rob Herring <robh@...nel.org>:
> On Fri, Dec 09, 2016 at 03:15:18PM +0100, Benjamin Gaignard wrote:
>> Add Timers and it sub-nodes into DT for stm32f429 family.
>>
>> version 6:
>> - split patch in two: one for SoC family and one for stm32f469
>> discovery board.
>>
>> version 5:
>> - rename gptimer node to timers
>> - re-order timers node par addresses
>>
>> version 4:
>> - remove unwanted indexing in pwm@ and timer@ node name
>> - use "reg" instead of additional parameters to set timer
>> configuration
>>
>> version 3:
>> - use "st,stm32-timer-trigger" in DT
>>
>> version 2:
>> - use parameters to describe hardware capabilities
>> - do not use references for pwm and iio timer subnodes
>>
>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
>> ---
>> arch/arm/boot/dts/stm32f429.dtsi | 275 +++++++++++++++++++++++++++++++++++++++
>> 1 file changed, 275 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/stm32f429.dtsi b/arch/arm/boot/dts/stm32f429.dtsi
>> index bca491d..d0fb9cc 100644
>> --- a/arch/arm/boot/dts/stm32f429.dtsi
>> +++ b/arch/arm/boot/dts/stm32f429.dtsi
>> @@ -355,6 +355,21 @@
>> slew-rate = <2>;
>> };
>> };
>> +
>> + pwm1_pins: pwm@1 {
>
> No reg prop, so should not have a unit-address. Given the names in the
> define below, seems like "timer1" would be appropriate.
>
Here pins muxing is only targeting PWM part of the the MFD , that why I have
labeled it with "pwm".
>> + pins {
>> + pinmux = <STM32F429_PA8_FUNC_TIM1_CH1>,
>> + <STM32F429_PB13_FUNC_TIM1_CH1N>,
>> + <STM32F429_PB12_FUNC_TIM1_BKIN>;
>> + };
>> + };
>> +
>> + pwm3_pins: pwm@3 {
>> + pins {
>> + pinmux = <STM32F429_PB4_FUNC_TIM3_CH1>,
>> + <STM32F429_PB5_FUNC_TIM3_CH2>;
>> + };
>> + };
>> };
>>
>> rcc: rcc@...23810 {
>> @@ -426,6 +441,266 @@
>> interrupts = <80>;
>> clocks = <&rcc 0 38>;
>> };
>> +
>> + timers2: timers@...00000 {
>
> timer@...
>
> It may be more than just a timer, there's not a better generic name.
"timer" is already used in DT for clocksource driver.
"timers" cover "advanced-control", "generic" and "basic" hardware timers IPs,
which share the same registers mapping (only the level of feature are different)
>
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40000000 0x400>;
>> + clocks = <&rcc 0 128>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <1>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers3: timers@...00400 {
>
> ditto
>
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40000400 0x400>;
>> + clocks = <&rcc 0 129>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <2>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers4: timers@...00800 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40000800 0x400>;
>> + clocks = <&rcc 0 130>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <3>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers5: timers@...00C00 {
>
> timer@...
>
> And use lowercase hex.
ok
>
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40000C00 0x400>;
>
> ditto
>
>> + clocks = <&rcc 0 131>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <4>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers6: timers@...01000 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40001000 0x400>;
>> + clocks = <&rcc 0 132>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <5>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers7: timers@...01400 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40001400 0x400>;
>> + clocks = <&rcc 0 133>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <6>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers12: timers@...01800 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40001800 0x400>;
>> + clocks = <&rcc 0 134>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <9>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers13: timers@...01C00 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40001C00 0x400>;
>> + clocks = <&rcc 0 135>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers14: timers@...02000 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40002000 0x400>;
>> + clocks = <&rcc 0 136>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers1: timers@...10000 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40010000 0x400>;
>> + clocks = <&rcc 0 160>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <0>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers8: timers@...10400 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40010400 0x400>;
>> + clocks = <&rcc 0 161>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <7>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers9: timers@...14000 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40014000 0x400>;
>> + clocks = <&rcc 0 176>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> +
>> + timer {
>> + compatible = "st,stm32-timer-trigger";
>> + reg = <8>;
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers10: timers@...14400 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40014400 0x400>;
>> + clocks = <&rcc 0 177>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> + };
>> +
>> + timers11: timers@...14800 {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> + compatible = "st,stm32-timers";
>> + reg = <0x40014800 0x400>;
>> + clocks = <&rcc 0 178>;
>> + clock-names = "clk_int";
>> + status = "disabled";
>> +
>> + pwm {
>> + compatible = "st,stm32-pwm";
>> + status = "disabled";
>> + };
>> + };
>> };
>> };
>>
>> --
>> 1.9.1
>>
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