Re: [PATCH v2 1/3] arm64: dts: actions: Enable clock controller for S700

Manivannan Sadhasivam
2018-07-02T02:33:11Z

Hi,

On Sun, Jul 01, 2018 at 07:50:01PM +0200, Saravanan Sekar wrote:
> Hi Mani,
>
>
> On 06/30/18 11:42, Manivannan Sadhasivam wrote:
> > On Thu, Jun 28, 2018 at 09:18:03PM +0200, Saravanan Sekar wrote:
> > > Added clock management controller for S700
> > >
> > > Signed-off-by: Parthiban Nallathambi <pn@denx.de>
> > > Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
> > > ---
> > > .../boot/dts/actions/s700-cubieboard7.dts | 7 -
> > > arch/arm64/boot/dts/actions/s700.dtsi | 8 ++
> > > include/dt-bindings/clock/actions,s700-cmu.h | 128 ++++++++++++++++++
> > > 3 files changed, 136 insertions(+), 7 deletions(-)
> > > create mode 100644 include/dt-bindings/clock/actions,s700-cmu.h
> > >
> > > diff --git a/arch/arm64/boot/dts/actions/s700-cubieboard7.dts b/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
> > > index ef79d7905f44..28f3f4a0f7f0 100644
> > > --- a/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
> > > +++ b/arch/arm64/boot/dts/actions/s700-cubieboard7.dts
> > > @@ -28,12 +28,6 @@
> > > device_type = "memory";
> > > reg = <0x1 0xe0000000 0x0 0x0>;
> > > };
> > > -
> > > - uart3_clk: uart3-clk {
> > > - compatible = "fixed-clock";
> > > - clock-frequency = <921600>;
> > > - #clock-cells = <0>;
> > > - };
> > Sourcing CMU clock for UART should be in a separate patch.
>
> sure
>
> > > };
> > > &timer {
> > > @@ -42,5 +36,4 @@
> > > &uart3 {
> > > status = "okay";
> > > - clocks = <&uart3_clk>;
> > > };
> > > diff --git a/arch/arm64/boot/dts/actions/s700.dtsi b/arch/arm64/boot/dts/actions/s700.dtsi
> > > index 66dd5309f0a2..3530b705df90 100644
> > > --- a/arch/arm64/boot/dts/actions/s700.dtsi
> > > +++ b/arch/arm64/boot/dts/actions/s700.dtsi
> > > @@ -4,6 +4,7 @@
> > > */
> > > #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > +#include <dt-bindings/clock/actions,s700-cmu.h>
> > > / {
> > > compatible = "actions,s700";
> > > @@ -44,6 +45,12 @@
> > > };
> > > };
> > > + clock: clock-controller@e0168000 {
> > > + compatible = "actions,s700-cmu";
> > > + reg = <0 0xe0168000 0 0x1000>;
> > > + #clock-cells = <1>;
> > > + };
> > > +
> > There is no fixed rate clock like losc?
>
> losc is 32k, I will add it
>
> > > reserved-memory {
> > > #address-cells = <2>;
> > > #size-cells = <2>;
> > > @@ -129,6 +136,7 @@
> > > compatible = "actions,s900-uart", "actions,owl-uart";
> > > reg = <0x0 0xe0126000 0x0 0x2000>;
> > > interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
> > > + clocks = <&clock CLK_UART3>;
> > > status = "disabled";
> > > };
> > > diff --git a/include/dt-bindings/clock/actions,s700-cmu.h b/include/dt-bindings/clock/actions,s700-cmu.h
> > > new file mode 100644
> > > index 000000000000..e5b4ea130953
> > > --- /dev/null
> > > +++ b/include/dt-bindings/clock/actions,s700-cmu.h
> > > @@ -0,0 +1,128 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +/*
> > > + * Actions S700 clock driver
> > > + *
> > > + * Copyright (c) 2014 Actions Semi Inc.
> > > + * Author: David Liu <liuwei@actions-semi.com>
> > > + *
> > > + * Author: Pathiban Nallathambi <pn@denx.de>
> > > + * Author: Saravanan Sekar <sravanhome@gmail.com>
> > > + */
> > > +
> > > +#ifndef __DT_BINDINGS_CLOCK_S700_H
> > > +#define __DT_BINDINGS_CLOCK_S700_H
> > > +
> > > +#define CLK_NONE 0
> > > +
> > > +/* fixed rate clocks */
> > > +#define CLK_LOSC 1
> > > +#define CLK_HOSC 2
> > > +
> > > +/* pll clocks */
> > > +#define CLK_CORE_PLL 3
> > > +#define CLK_DEV_PLL 4
> > > +#define CLK_DDR_PLL 5
> > > +#define CLK_NAND_PLL 6
> > > +#define CLK_DISPLAY_PLL 7
> > > +#define CLK_TVOUT_PLL 8
> > > +#define CLK_CVBS_PLL 9
> > > +#define CLK_AUDIO_PLL 10
> > > +#define CLK_ETHERNET_PLL 11
> > > +
> > Remove extra new line please.
> >
> > > +
> > > +/* system clock */
> > > +#define CLK_SYS_BASE 12
> > > +#define CLK_CPU CLK_SYS_BASE
> > > +#define CLK_DEV (CLK_SYS_BASE+1)
> > > +#define CLK_AHB (CLK_SYS_BASE+2)
> > > +#define CLK_APB (CLK_SYS_BASE+3)
> > > +#define CLK_DMAC (CLK_SYS_BASE+4)
> > > +#define CLK_NOC0_CLK_MUX (CLK_SYS_BASE+5)
> > > +#define CLK_NOC1_CLK_MUX (CLK_SYS_BASE+6)
> > > +#define CLK_HP_CLK_MUX (CLK_SYS_BASE+7)
> > > +#define CLK_HP_CLK_DIV (CLK_SYS_BASE+8)
> > > +#define CLK_NOC1_CLK_DIV (CLK_SYS_BASE+9)
> > > +#define CLK_NOC0 (CLK_SYS_BASE+10)
> > > +#define CLK_NOC1 (CLK_SYS_BASE+11)
> > > +#define CLK_SENOR_SRC (CLK_SYS_BASE+12)
> > > +
> > > +/* peripheral device clock */
> > > +#define CLK_PERIP_BASE 25
> > > +#define CLK_GPIO (CLK_PERIP_BASE)
> > > +#define CLK_TIMER (CLK_PERIP_BASE+1)
> > > +#define CLK_DSI (CLK_PERIP_BASE+2)
> > > +#define CLK_CSI (CLK_PERIP_BASE+3)
> > > +#define CLK_SI (CLK_PERIP_BASE+4)
> > > +#define CLK_DE (CLK_PERIP_BASE+5)
> > > +#define CLK_HDE (CLK_PERIP_BASE+6)
> > > +#define CLK_VDE (CLK_PERIP_BASE+7)
> > > +#define CLK_VCE (CLK_PERIP_BASE+8)
> > > +#define CLK_NAND (CLK_PERIP_BASE+9)
> > > +#define CLK_SD0 (CLK_PERIP_BASE+10)
> > > +#define CLK_SD1 (CLK_PERIP_BASE+11)
> > > +#define CLK_SD2 (CLK_PERIP_BASE+12)
> > > +
> > > +#define CLK_UART0 (CLK_PERIP_BASE+13)
> > > +#define CLK_UART1 (CLK_PERIP_BASE+14)
> > > +#define CLK_UART2 (CLK_PERIP_BASE+15)
> > > +#define CLK_UART3 (CLK_PERIP_BASE+16)
> > > +#define CLK_UART4 (CLK_PERIP_BASE+17)
> > > +#define CLK_UART5 (CLK_PERIP_BASE+18)
> > > +#define CLK_UART6 (CLK_PERIP_BASE+19)
> > > +
> > > +#define CLK_PWM0 (CLK_PERIP_BASE+20)
> > > +#define CLK_PWM1 (CLK_PERIP_BASE+21)
> > > +#define CLK_PWM2 (CLK_PERIP_BASE+22)
> > > +#define CLK_PWM3 (CLK_PERIP_BASE+23)
> > > +#define CLK_PWM4 (CLK_PERIP_BASE+24)
> > > +#define CLK_PWM5 (CLK_PERIP_BASE+25)
> > > +#define CLK_GPU3D (CLK_PERIP_BASE+26)
> > > +
> > > +#define CLK_I2C0 (CLK_PERIP_BASE+27)
> > > +#define CLK_I2C1 (CLK_PERIP_BASE+28)
> > > +#define CLK_I2C2 (CLK_PERIP_BASE+29)
> > > +#define CLK_I2C3 (CLK_PERIP_BASE+30)
> > > +
> > > +
> > > +#define CLK_SPI0 (CLK_PERIP_BASE+31)
> > > +#define CLK_SPI1 (CLK_PERIP_BASE+32)
> > > +#define CLK_SPI2 (CLK_PERIP_BASE+33)
> > > +#define CLK_SPI3 (CLK_PERIP_BASE+34)
> > > +
> > > +#define CLK_USB3_480MPLL0 (CLK_PERIP_BASE+35)
> > > +#define CLK_USB3_480MPHY0 (CLK_PERIP_BASE+36)
> > > +#define CLK_USB3_5GPHY (CLK_PERIP_BASE+37)
> > > +#define CLK_USB3_CCE (CLK_PERIP_BASE+48)
> > > +#define CLK_USB3_MAC (CLK_PERIP_BASE+49)
> > > +
> > > +
> > > +#define CLK_LCD (CLK_PERIP_BASE+50)
> > > +#define CLK_HDMI_AUDIO (CLK_PERIP_BASE+51)
> > > +#define CLK_I2SRX (CLK_PERIP_BASE+52)
> > > +#define CLK_I2STX (CLK_PERIP_BASE+53)
> > > +
> > > +#define CLK_SENSOR0 (CLK_PERIP_BASE+54)
> > > +#define CLK_SENSOR1 (CLK_PERIP_BASE+55)
> > > +
> > > +#define CLK_HDMI_DEV (CLK_PERIP_BASE+56)
> > > +
> > > +#define CLK_ETHERNET (CLK_PERIP_BASE+59)
> > > +#define CLK_RMII_REF (CLK_PERIP_BASE+60)
> > > +
> > > +#define CLK_USB2H0_PLLEN (CLK_PERIP_BASE+61)
> > > +#define CLK_USB2H0_PHY (CLK_PERIP_BASE+62)
> > > +#define CLK_USB2H0_CCE (CLK_PERIP_BASE+63)
> > > +#define CLK_USB2H1_PLLEN (CLK_PERIP_BASE+64)
> > > +#define CLK_USB2H1_PHY (CLK_PERIP_BASE+65)
> > > +#define CLK_USB2H1_CCE (CLK_PERIP_BASE+66)
> > > +
> > > +
> > > +#define CLK_TVOUT (CLK_PERIP_BASE+67)
> > > +
> > > +#define CLK_THERMAL_SENSOR (CLK_PERIP_BASE+68)
> > > +
> > > +#define CLK_IRC_SWITCH (CLK_PERIP_BASE+69)
> > > +#define CLK_PCM1 (CLK_PERIP_BASE+70)
> > > +#define CLK_NR_CLKS (CLK_PCM1) /* update on adding new clk */
> > > +
> > Since the index starts from 0, CLK_NR_CLKS should be CLK_PCM1 + 1
>
> 0 is for CLK_NONE, so actual clock starts from 1
>

yes, but the clk register only happens till (CLK_NR_CLKS - 1). Please see
[1] the associated code. With your logic, CLK_PCM1 will never get
registered.

Thanks,
Mani

[1] https://github.com/torvalds/linux/blob/master/drivers/clk/actions/owl-common.c#L69

> > Thanks,
> > Mani
> >
> > > +#endif /* __DT_BINDINGS_CLOCK_S700_H */
> > > --
> > > 2.18.0
> > >
>