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Date:   Sun, 2 Aug 2020 12:35:24 +0300
From:   Cristian Ciocaltea <cristian.ciocaltea@...il.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Andreas Färber <afaerber@...e.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-actions@...ts.infradead.org
Subject: Re: [PATCH 1/3] dt-bindings: pinctrl: Add bindings for Actions S500
 SoC

On Sat, Aug 01, 2020 at 08:16:06PM +0530, Manivannan Sadhasivam wrote:
> Hi,
> 
> On Fri, Jun 26, 2020 at 04:06:41PM +0300, Cristian Ciocaltea wrote:
> > On Fri, Jun 26, 2020 at 12:50:46PM +0530, Manivannan Sadhasivam wrote:
> > > 
> > > 
> > > On 26 June 2020 1:46:18 AM IST, Cristian Ciocaltea <cristian.ciocaltea@...il.com> wrote:
> > > >Add pinctrl and gpio bindings for Actions Semi S500 SoC.
> > > >
> > > >Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...il.com>
> > > >---
> > > > .../pinctrl/actions,s500-pinctrl.yaml         | 228 ++++++++++++++++++
> > > > 1 file changed, 228 insertions(+)
> > > >create mode 100644
> > > >Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> > > >
> > > >diff --git
> > > >a/Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> > > >b/Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> > > >new file mode 100644
> > > >index 000000000000..856947c70844
> > > >--- /dev/null
> > > >+++
> > > >b/Documentation/devicetree/bindings/pinctrl/actions,s500-pinctrl.yaml
> > > >@@ -0,0 +1,228 @@
> > > >+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > >+%YAML 1.2
> > > >+---
> > > >+$id: http://devicetree.org/schemas/pinctrl/actions,s500-pinctrl.yaml#
> > > >+$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > >+
> > > >+title: Actions Semi S500 SoC pinmux & GPIO controller
> > > >+
> > > >+maintainers:
> > > >+  - Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > > 
> > > Feel free to add yourself as co-maintainer since you are the one contributing S500 support. 
> > 
> > Ok, thanks!
> > 
> > > 
> > > >+
> > > >+description: |
> > > >+  Pinmux & GPIO controller manages pin multiplexing & configuration
> > > >including
> > > >+  GPIO function selection & GPIO attributes configuration. Please
> > > >refer to
> > > >+  pinctrl-bindings.txt in this directory for common binding part and
> > > >usage.
> > > >+
> > > >+properties:
> > > >+  compatible:
> > > >+    const: actions,s500-pinctrl
> > > >+
> > > >+  reg:
> > > >+    minItems: 1
> > > >+    maxItems: 4
> > > 
> > > 4?
> > > 
> > > Thanks, 
> > > Mani
> > 
> > The pinctrl node in the owl-s500 DTS has a more granular specification
> > for the reg property, in order to exclude the unused ranges (i.e. PWM):
> > 
> >   reg = <0xb01b0000 0x40>, /* GPIO */
> >         <0xb01b0040 0x10>, <0xb01b0060 0x18>, <0xb01b0080 0xc>;
> > 
> > The complete node description is available in the related patch:
> > https://lore.kernel.org/lkml/b43c9d1a1ef689403bc17b2474aff20629b58263.1593124368.git.cristian.ciocaltea@gmail.com/
> > 
> > For the sake of simplicity, in the example below I used the contiguous
> > range. However, I've just noticed a copy/paste issue there, the correct
> > range should be <0xb01b0000 0x8c> - will be fixed in the next revision.
> > 
> 
> Hmm, okay. We don't have a better solution _yet_ for this issue and I'm okay
> with specifying split ranges in the meantime.

To avoid any further confusion, I will also change the example to use
the split ranges. This will match the reg items description nodes as
indicated by Rob.

I will send a new revision of the patch series as soon as we clarify
the GPIO ports offsets in the pinctrl driver implementation. Please
let me know if I should provide more information on that topic.

Thanks,
Cristi
 
> Thanks,
> Mani
> 
> > Thanks for reviewing,
> > Cristi
> > 
> > > 
> > > >+
> > > >+  clocks:
> > > >+    maxItems: 1
> > > >+
> > > >+  gpio-controller: true
> > > >+
> > > >+  gpio-ranges:
> > > >+    maxItems: 1
> > > >+
> > > >+  '#gpio-cells':
> > > >+    description:
> > > >+      Specifies the pin number and flags, as defined in
> > > >+      include/dt-bindings/gpio/gpio.h
> > > >+    const: 2
> > > >+
> > > >+  interrupt-controller: true
> > > >+
> > > >+  '#interrupt-cells':
> > > >+    description:
> > > >+      Specifies the pin number and flags, as defined in
> > > >+      include/dt-bindings/interrupt-controller/irq.h
> > > >+    const: 2
> > > >+
> > > >+  interrupts:
> > > >+    description:
> > > >+      One interrupt per each of the 5 GPIO ports supported by the
> > > >controller,
> > > >+      sorted by port number ascending order.
> > > >+    minItems: 5
> > > >+    maxItems: 5
> > > >+
> > > >+patternProperties:
> > > >+  '^.*$':
> > > >+    if:
> > > >+      type: object
> > > >+    then:
> > > >+      patternProperties:
> > > >+        'pinmux$':
> > > >+          type: object
> > > >+          description:
> > > >+            Pinctrl node's client devices specify pin muxes using
> > > >subnodes,
> > > >+            which in turn use the standard properties below.
> > > >+          $ref: pinmux-node.yaml#
> > > >+
> > > >+          properties:
> > > >+            groups:
> > > >+              description:
> > > >+                List of gpio pin groups affected by the functions
> > > >specified in
> > > >+                this subnode.
> > > >+              items:
> > > >+                oneOf:
> > > >+                  - enum: [lcd0_d18_mfp, rmii_crs_dv_mfp,
> > > >rmii_txd0_mfp,
> > > >+                      rmii_txd1_mfp, rmii_txen_mfp, rmii_rxen_mfp,
> > > >+                      rmii_rxd1_mfp, rmii_rxd0_mfp, rmii_ref_clk_mfp,
> > > >+                      i2s_d0_mfp, i2s_pcm1_mfp, i2s0_pcm0_mfp,
> > > >i2s1_pcm0_mfp,
> > > >+                      i2s_d1_mfp, ks_in2_mfp, ks_in1_mfp, ks_in0_mfp,
> > > >+                      ks_in3_mfp, ks_out0_mfp, ks_out1_mfp,
> > > >ks_out2_mfp,
> > > >+                      lvds_o_pn_mfp, dsi_dn0_mfp, dsi_dp2_mfp,
> > > >lcd0_d17_mfp,
> > > >+                      dsi_dp3_mfp, dsi_dn3_mfp, dsi_dp0_mfp,
> > > >lvds_ee_pn_mfp,
> > > >+                      spi0_i2c_pcm_mfp, spi0_i2s_pcm_mfp,
> > > >dsi_dnp1_cp_mfp,
> > > >+                      lvds_e_pn_mfp, dsi_dn2_mfp, uart2_rtsb_mfp,
> > > >+                      uart2_ctsb_mfp, uart3_rtsb_mfp, uart3_ctsb_mfp,
> > > >+                      sd0_d0_mfp, sd0_d1_mfp, sd0_d2_d3_mfp,
> > > >sd1_d0_d3_mfp,
> > > >+                      sd0_cmd_mfp, sd0_clk_mfp, sd1_cmd_mfp,
> > > >uart0_rx_mfp,
> > > >+                      clko_25m_mfp, csi_cn_cp_mfp, sens0_ckout_mfp,
> > > >+                      uart0_tx_mfp, i2c0_mfp, csi_dn_dp_mfp,
> > > >sen0_pclk_mfp,
> > > >+                      pcm1_in_mfp, pcm1_clk_mfp, pcm1_sync_mfp,
> > > >pcm1_out_mfp,
> > > >+                      dnand_data_wr_mfp, dnand_acle_ce0_mfp,
> > > >nand_ceb2_mfp,
> > > >+                      nand_ceb3_mfp]
> > > >+              minItems: 1
> > > >+              maxItems: 32
> > > >+
> > > >+            function:
> > > >+              description:
> > > >+                Specify the alternative function to be configured for
> > > >the
> > > >+                given gpio pin groups.
> > > >+              enum: [nor, eth_rmii, eth_smii, spi0, spi1, spi2, spi3,
> > > >sens0,
> > > >+                sens1, uart0, uart1, uart2, uart3, uart4, uart5,
> > > >uart6, i2s0,
> > > >+                i2s1, pcm1, pcm0, ks, jtag, pwm0, pwm1, pwm2, pwm3,
> > > >pwm4, pwm5,
> > > >+                p0, sd0, sd1, sd2, i2c0, i2c1, i2c3, dsi, lvds, usb30,
> > > >clko_25m,
> > > >+                mipi_csi, nand, spdif, ts, lcd0]
> > > >+
> > > >+          required:
> > > >+            - groups
> > > >+            - function
> > > >+
> > > >+          additionalProperties: false
> > > >+
> > > >+        'pinconf$':
> > > >+          type: object
> > > >+          description:
> > > >+            Pinctrl node's client devices specify pin configurations
> > > >using
> > > >+            subnodes, which in turn use the standard properties below.
> > > >+          $ref: pincfg-node.yaml#
> > > >+
> > > >+          properties:
> > > >+            groups:
> > > >+              description:
> > > >+                List of gpio pin groups affected by the drive-strength
> > > >property
> > > >+                specified in this subnode.
> > > >+              items:
> > > >+                oneOf:
> > > >+                  - enum: [sirq_drv, rmii_txd01_txen_drv,
> > > >rmii_rxer_drv,
> > > >+                      rmii_crs_drv, rmii_rxd10_drv, rmii_ref_clk_drv,
> > > >+                      smi_mdc_mdio_drv, i2s_d0_drv, i2s_bclk0_drv,
> > > >i2s3_drv,
> > > >+                      i2s13_drv, pcm1_drv, ks_in_drv, ks_out_drv,
> > > >lvds_all_drv,
> > > >+                      lcd_dsi_drv, dsi_drv, sd0_d0_d3_drv,
> > > >sd1_d0_d3_drv,
> > > >+                      sd0_cmd_drv, sd0_clk_drv, sd1_cmd_drv,
> > > >sd1_clk_drv,
> > > >+                      spi0_all_drv, uart0_rx_drv, uart0_tx_drv,
> > > >uart2_all_drv,
> > > >+                      i2c0_all_drv, i2c12_all_drv, sens0_pclk_drv,
> > > >+                      sens0_ckout_drv, uart3_all_drv]
> > > >+              minItems: 1
> > > >+              maxItems: 32
> > > >+
> > > >+            pins:
> > > >+              description:
> > > >+                List of gpio pins affected by the bias-pull-* and
> > > >+                input-schmitt-* properties specified in this subnode.
> > > >+              items:
> > > >+                oneOf:
> > > >+                  - enum: [dnand_dqs, dnand_dqsn, eth_txd0, eth_txd1,
> > > >eth_txen,
> > > >+                      eth_rxer, eth_crs_dv, eth_rxd1, eth_rxd0,
> > > >eth_ref_clk,
> > > >+                      eth_mdc, eth_mdio, sirq0, sirq1, sirq2, i2s_d0,
> > > >i2s_bclk0,
> > > >+                      i2s_lrclk0, i2s_mclk0, i2s_d1, i2s_bclk1,
> > > >i2s_lrclk1,
> > > >+                      i2s_mclk1, ks_in0, ks_in1, ks_in2, ks_in3,
> > > >ks_out0,
> > > >+                      ks_out1, ks_out2, lvds_oep, lvds_oen, lvds_odp,
> > > >lvds_odn,
> > > >+                      lvds_ocp, lvds_ocn, lvds_obp, lvds_obn,
> > > >lvds_oap,
> > > >+                      lvds_oan, lvds_eep, lvds_een, lvds_edp,
> > > >lvds_edn,
> > > >+                      lvds_ecp, lvds_ecn, lvds_ebp, lvds_ebn,
> > > >lvds_eap,
> > > >+                      lvds_ean, lcd0_d18, lcd0_d17, dsi_dp3, dsi_dn3,
> > > >dsi_dp1,
> > > >+                      dsi_dn1, dsi_cp, dsi_cn, dsi_dp0, dsi_dn0,
> > > >dsi_dp2,
> > > >+                      dsi_dn2, sd0_d0, sd0_d1, sd0_d2, sd0_d3, sd1_d0,
> > > >sd1_d1,
> > > >+                      sd1_d2, sd1_d3, sd0_cmd, sd0_clk, sd1_cmd,
> > > >sd1_clk,
> > > >+                      spi0_sclk, spi0_ss, spi0_miso, spi0_mosi,
> > > >uart0_rx,
> > > >+                      uart0_tx, i2c0_sclk, i2c0_sdata, sensor0_pclk,
> > > >+                      sensor0_ckout, dnand_ale, dnand_cle, dnand_ceb0,
> > > >+                      dnand_ceb1, dnand_ceb2, dnand_ceb3, uart2_rx,
> > > >uart2_tx,
> > > >+                      uart2_rtsb, uart2_ctsb, uart3_rx, uart3_tx,
> > > >uart3_rtsb,
> > > >+                      uart3_ctsb, pcm1_in, pcm1_clk, pcm1_sync,
> > > >pcm1_out,
> > > >+                      i2c1_sclk, i2c1_sdata, i2c2_sclk, i2c2_sdata,
> > > >csi_dn0,
> > > >+                      csi_dp0, csi_dn1, csi_dp1, csi_dn2, csi_dp2,
> > > >csi_dn3,
> > > >+                      csi_dp3, csi_cn, csi_cp, dnand_d0, dnand_d1,
> > > >dnand_d2,
> > > >+                      dnand_d3, dnand_d4, dnand_d5, dnand_d6,
> > > >dnand_d7,
> > > >+                      dnand_rb, dnand_rdb, dnand_rdbn, dnand_wrb,
> > > >porb,
> > > >+                      clko_25m, bsel, pkg0, pkg1, pkg2, pkg3]
> > > >+              minItems: 1
> > > >+              maxItems: 64
> > > >+
> > > >+            bias-pull-up: true
> > > >+            bias-pull-down: true
> > > >+
> > > >+            drive-strength:
> > > >+              description:
> > > >+                Selects the drive strength for the specified pins, in
> > > >mA.
> > > >+              enum: [2, 4, 8, 12]
> > > >+
> > > >+            input-schmitt-enable: true
> > > >+            input-schmitt-disable: true
> > > >+
> > > >+          additionalProperties: false
> > > >+
> > > >+required:
> > > >+  - compatible
> > > >+  - reg
> > > >+  - clocks
> > > >+  - gpio-controller
> > > >+  - gpio-ranges
> > > >+  - '#gpio-cells'
> > > >+  - interrupt-controller
> > > >+  - '#interrupt-cells'
> > > >+  - interrupts
> > > >+
> > > >+additionalProperties: false
> > > >+
> > > >+examples:
> > > >+  - |
> > > >+    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > >+    pinctrl: pinctrl@...b0000 {
> > > >+        compatible = "actions,s500-pinctrl";
> > > >+        reg = <0xe01b0000 0x1000>;
> > > >+        clocks = <&cmu 20>;
> > > >+        gpio-controller;
> > > >+        gpio-ranges = <&pinctrl 0 0 132>;
> > > >+        #gpio-cells = <2>;
> > > >+        interrupt-controller;
> > > >+        #interrupt-cells = <2>;
> > > >+        interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
> > > >+                     <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
> > > >+                     <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
> > > >+                     <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
> > > >+                     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
> > > >+
> > > >+        i2c0_default: i2c0_default {
> > > >+            pinmux {
> > > >+                groups = "i2c0_mfp";
> > > >+                function = "i2c0";
> > > >+            };
> > > >+
> > > >+            pinconf {
> > > >+                pins = "i2c0_sclk", "i2c0_sdata";
> > > >+                bias-pull-up;
> > > >+            };
> > > >+        };
> > > >+    };
> > > >+
> > > >+...
> > > 
> > > -- 
> > > Sent from my Android device with K-9 Mail. Please excuse my brevity.

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