pinctrl: tegra: Add MIPI pad control

This patch adds MIPI CSI/DSIB pad control mux register
from the APB misc block to tegra pinctrl.

Without writing to this register, the dsib pads are
muxed as csi, and cannot be used.

The register is not yet documented in the TRM, here is
the description:

70000820: APB_MISC_GP_MIPI_PAD_CTRL_0
	[31:02] RESERVED
	[01:01] DSIB_MODE       [CSI=0,DSIB=1]
	[00:00] RESERVED

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 11 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt
index 6464bf769460..189814e7cdc7 100644
--- a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt
+++ b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-pinmux.txt
@@ -10,6 +10,7 @@ Required properties:
 - reg: Should contain a list of base address and size pairs for:
     -- first entry - the drive strength and pad control registers.
     -- second entry - the pinmux registers
+    -- third entry - the MIPI_PAD_CTRL register
 
 Tegra124 adds the following optional properties for pin configuration subnodes.
 The macros for options are defined in the
@@ -91,6 +92,12 @@ Valid values for pin and group names are:
     dbg, sdio3, spi, uaa, uab, uart2, uart3, sdio1, ddc, gma, gme, gmf, gmg,
     gmh, owr, uda, gpv, dev3, cec, usb_vbus_en, ao3, ao0, hv0, sdio4, ao4.
 
+  MIPI pad control groups:
+
+    These support only the nvidia,function property.
+
+    dsi_b
+
 Valid values for nvidia,functions are:
 
   blink, cec, cldvfs, clk12, cpu, dap, dap1, dap2, dev3, displaya,
@@ -101,14 +108,15 @@ Valid values for nvidia,functions are:
   sdmmc4, soc, spdif, spi1, spi2, spi3, spi4, spi5, spi6, trace, uarta,
   uartb, uartc, uartd, ulpi, usb, vgp1, vgp2, vgp3, vgp4, vgp5, vgp6,
   vi, vi_alt1, vi_alt3, vimclk2, vimclk2_alt, sata, ccla, pe0, pe, pe1,
-  dp, rtck, sys, clk tmds.
+  dp, rtck, sys, clk tmds, csi, dsi_b
 
 Example:
 
         pinmux: pinmux {
                 compatible = "nvidia,tegra124-pinmux";
-                reg = <0x70000868 0x164         /* Pad control registers */
-                       0x70003000 0x434>;       /* PinMux registers */
+                reg = <0x0 0x70000868 0x0 0x164>, /* Pad control registers */
+                      <0x0 0x70003000 0x0 0x434>, /* Mux registers */
+                      <0x0 0x70000820 0x0 0x8>;   /* MIPI pad control */
         };
 
 Example pinmux entries: