pinctrl: imx: move hard-coding data into device tree

Currently, all imx pinctrl drivers maintain a big array of struct
imx_pin_reg which hard-codes data like register offset and mux mode
setting for each pin function.  Every time a new imx SoC support is
added, we need to add such a big mount of data.  With moving to single
kernel build, it's only matter of time to be blamed on memory consuming.

With DTC pre-processor support in place, the patch moves all these data
into device tree by redefining the PIN_FUNC_ID in imxXX-pinfunc.h and
changing the PIN_FUNC_ID parsing code a little bit.

The pin id gets re-numbered based on mux register offset, or config
register offset if the pin has no mux register, so that kernel can
identify the pin id from register offsets provided by device tree.

As a bonus point of the change, those arbitrary magic numbers standing
for particular PIN_FUNC_ID in device tree sources are now replaced by
macros to improve the readability of dts files.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt

@@ -24,9 +24,9 @@ Required properties for iomux controller:
 Required properties for pin configuration node:
 - fsl,pins: two integers array, represents a group of pins mux and config
   setting. The format is fsl,pins = <PIN_FUNC_ID CONFIG>, PIN_FUNC_ID is a
-  pin working on a specific function, CONFIG is the pad setting value like
-  pull-up on this pin. Please refer to fsl,<soc>-pinctrl.txt for the valid
-  pins and functions of each SoC.
+  pin working on a specific function, which consists of a tuple of
+  <mux_reg conf_reg input_reg mux_val input_val>.  CONFIG is the pad setting
+  value like pull-up on this pin.
 
 Bits used for CONFIG:
 NO_PAD_CTL(1 << 31): indicate this pin does not need config.

arch/arm/boot/dts/imx51-babbage.dts

@@ -222,13 +222,13 @@ &iomuxc {
 	hog {
 		pinctrl_hog: hoggrp {
 			fsl,pins = <
-				694  0x20d5	/* MX51_PAD_GPIO1_0__SD1_CD */
-				697  0x20d5	/* MX51_PAD_GPIO1_1__SD1_WP */
-				737  0x100	/* MX51_PAD_GPIO1_5__GPIO1_5 */
-				740  0x100	/* MX51_PAD_GPIO1_6__GPIO1_6 */
-				121  0x5	/* MX51_PAD_EIM_A27__GPIO2_21 */
-				402  0x85	/* MX51_PAD_CSPI1_SS0__GPIO4_24 */
-				405  0x85	/* MX51_PAD_CSPI1_SS1__GPIO4_25 */
+				MX51_PAD_GPIO1_0__SD1_CD     0x20d5
+				MX51_PAD_GPIO1_1__SD1_WP     0x20d5
+				MX51_PAD_GPIO1_5__GPIO1_5    0x100
+				MX51_PAD_GPIO1_6__GPIO1_6    0x100
+				MX51_PAD_EIM_A27__GPIO2_21   0x5
+				MX51_PAD_CSPI1_SS0__GPIO4_24 0x85
+				MX51_PAD_CSPI1_SS1__GPIO4_25 0x85
 			>;
 		};
 	};

arch/arm/boot/dts/imx53-ard.dts

@@ -112,40 +112,40 @@ &iomuxc {
 	hog {
 		pinctrl_hog: hoggrp {
 			fsl,pins = <
-				1077 0x80000000	/* MX53_PAD_GPIO_1__GPIO1_1 */
-				1085 0x80000000	/* MX53_PAD_GPIO_9__GPIO1_9 */
-				486  0x80000000	/* MX53_PAD_EIM_EB3__GPIO2_31 */
-				739  0x80000000	/* MX53_PAD_GPIO_10__GPIO4_0 */
-				218  0x80000000	/* MX53_PAD_DISP0_DAT16__GPIO5_10 */
-				226  0x80000000	/* MX53_PAD_DISP0_DAT17__GPIO5_11 */
-				233  0x80000000	/* MX53_PAD_DISP0_DAT18__GPIO5_12 */
-				241  0x80000000	/* MX53_PAD_DISP0_DAT19__GPIO5_13 */
-				429  0x80000000	/* MX53_PAD_EIM_D16__EMI_WEIM_D_16 */
-				435  0x80000000	/* MX53_PAD_EIM_D17__EMI_WEIM_D_17 */
-				441  0x80000000	/* MX53_PAD_EIM_D18__EMI_WEIM_D_18 */
-				448  0x80000000	/* MX53_PAD_EIM_D19__EMI_WEIM_D_19 */
-				456  0x80000000	/* MX53_PAD_EIM_D20__EMI_WEIM_D_20 */
-				464  0x80000000	/* MX53_PAD_EIM_D21__EMI_WEIM_D_21 */
-				471  0x80000000	/* MX53_PAD_EIM_D22__EMI_WEIM_D_22 */
-				477  0x80000000	/* MX53_PAD_EIM_D23__EMI_WEIM_D_23 */
-				492  0x80000000	/* MX53_PAD_EIM_D24__EMI_WEIM_D_24 */
-				500  0x80000000	/* MX53_PAD_EIM_D25__EMI_WEIM_D_25 */
-				508  0x80000000	/* MX53_PAD_EIM_D26__EMI_WEIM_D_26 */
-				516  0x80000000	/* MX53_PAD_EIM_D27__EMI_WEIM_D_27 */
-				524  0x80000000	/* MX53_PAD_EIM_D28__EMI_WEIM_D_28 */
-				532  0x80000000	/* MX53_PAD_EIM_D29__EMI_WEIM_D_29 */
-				540  0x80000000	/* MX53_PAD_EIM_D30__EMI_WEIM_D_30 */
-				548  0x80000000	/* MX53_PAD_EIM_D31__EMI_WEIM_D_31 */
-				637  0x80000000	/* MX53_PAD_EIM_DA0__EMI_NAND_WEIM_DA_0 */
-				642  0x80000000	/* MX53_PAD_EIM_DA1__EMI_NAND_WEIM_DA_1 */
-				647  0x80000000	/* MX53_PAD_EIM_DA2__EMI_NAND_WEIM_DA_2 */
-				652  0x80000000	/* MX53_PAD_EIM_DA3__EMI_NAND_WEIM_DA_3 */
-				657  0x80000000	/* MX53_PAD_EIM_DA4__EMI_NAND_WEIM_DA_4 */
-				662  0x80000000	/* MX53_PAD_EIM_DA5__EMI_NAND_WEIM_DA_5 */
-				667  0x80000000	/* MX53_PAD_EIM_DA6__EMI_NAND_WEIM_DA_6 */
-				611  0x80000000	/* MX53_PAD_EIM_OE__EMI_WEIM_OE */
-				616  0x80000000	/* MX53_PAD_EIM_RW__EMI_WEIM_RW */
-				607  0x80000000	/* MX53_PAD_EIM_CS1__EMI_WEIM_CS_1 */
+				MX53_PAD_GPIO_1__GPIO1_1             0x80000000
+				MX53_PAD_GPIO_9__GPIO1_9             0x80000000
+				MX53_PAD_EIM_EB3__GPIO2_31           0x80000000
+				MX53_PAD_GPIO_10__GPIO4_0            0x80000000
+				MX53_PAD_DISP0_DAT16__GPIO5_10	     0x80000000
+				MX53_PAD_DISP0_DAT17__GPIO5_11       0x80000000
+				MX53_PAD_DISP0_DAT18__GPIO5_12       0x80000000
+				MX53_PAD_DISP0_DAT19__GPIO5_13       0x80000000
+				MX53_PAD_EIM_D16__EMI_WEIM_D_16      0x80000000
+				MX53_PAD_EIM_D17__EMI_WEIM_D_17      0x80000000
+				MX53_PAD_EIM_D18__EMI_WEIM_D_18      0x80000000
+				MX53_PAD_EIM_D19__EMI_WEIM_D_19      0x80000000
+				MX53_PAD_EIM_D20__EMI_WEIM_D_20      0x80000000
+				MX53_PAD_EIM_D21__EMI_WEIM_D_21      0x80000000
+				MX53_PAD_EIM_D22__EMI_WEIM_D_22      0x80000000
+				MX53_PAD_EIM_D23__EMI_WEIM_D_23      0x80000000
+				MX53_PAD_EIM_D24__EMI_WEIM_D_24      0x80000000
+				MX53_PAD_EIM_D25__EMI_WEIM_D_25      0x80000000
+				MX53_PAD_EIM_D26__EMI_WEIM_D_26      0x80000000
+				MX53_PAD_EIM_D27__EMI_WEIM_D_27      0x80000000
+				MX53_PAD_EIM_D28__EMI_WEIM_D_28      0x80000000
+				MX53_PAD_EIM_D29__EMI_WEIM_D_29      0x80000000
+				MX53_PAD_EIM_D30__EMI_WEIM_D_30      0x80000000
+				MX53_PAD_EIM_D31__EMI_WEIM_D_31      0x80000000
+				MX53_PAD_EIM_DA0__EMI_NAND_WEIM_DA_0 0x80000000
+				MX53_PAD_EIM_DA1__EMI_NAND_WEIM_DA_1 0x80000000
+				MX53_PAD_EIM_DA2__EMI_NAND_WEIM_DA_2 0x80000000
+				MX53_PAD_EIM_DA3__EMI_NAND_WEIM_DA_3 0x80000000
+				MX53_PAD_EIM_DA4__EMI_NAND_WEIM_DA_4 0x80000000
+				MX53_PAD_EIM_DA5__EMI_NAND_WEIM_DA_5 0x80000000
+				MX53_PAD_EIM_DA6__EMI_NAND_WEIM_DA_6 0x80000000
+				MX53_PAD_EIM_OE__EMI_WEIM_OE	     0x80000000
+				MX53_PAD_EIM_RW__EMI_WEIM_RW	     0x80000000
+				MX53_PAD_EIM_CS1__EMI_WEIM_CS_1	     0x80000000
 			>;
 		};
 	};

arch/arm/boot/dts/imx53-evk.dts

@@ -82,14 +82,14 @@ &iomuxc {
 	hog {
 		pinctrl_hog: hoggrp {
 			fsl,pins = <
-				424  0x80000000	/* MX53_PAD_EIM_EB2__GPIO2_30 */
-				449  0x80000000	/* MX53_PAD_EIM_D19__GPIO3_19 */
-				693  0x80000000	/* MX53_PAD_EIM_DA11__GPIO3_11 */
-				697  0x80000000	/* MX53_PAD_EIM_DA12__GPIO3_12 */
-				701  0x80000000	/* MX53_PAD_EIM_DA13__GPIO3_13 */
-				705  0x80000000	/* MX53_PAD_EIM_DA14__GPIO3_14 */
-				868  0x80000000	/* MX53_PAD_PATA_DA_0__GPIO7_6 */
-				873  0x80000000	/* MX53_PAD_PATA_DA_1__GPIO7_7 */
+				MX53_PAD_EIM_EB2__GPIO2_30  0x80000000
+				MX53_PAD_EIM_D19__GPIO3_19  0x80000000
+				MX53_PAD_EIM_DA11__GPIO3_11 0x80000000
+				MX53_PAD_EIM_DA12__GPIO3_12 0x80000000
+				MX53_PAD_EIM_DA13__GPIO3_13 0x80000000
+				MX53_PAD_EIM_DA14__GPIO3_14 0x80000000
+				MX53_PAD_PATA_DA_0__GPIO7_6 0x80000000
+				MX53_PAD_PATA_DA_1__GPIO7_7 0x80000000
 			>;
 		};
 	};

arch/arm/boot/dts/imx53-qsb.dts

@@ -110,21 +110,21 @@ &iomuxc {
 	hog {
 		pinctrl_hog: hoggrp {
 			fsl,pins = <
-				1071 0x80000000	/* MX53_PAD_GPIO_0__CCM_SSI_EXT1_CLK */
-				1141 0x80000000	/* MX53_PAD_GPIO_8__GPIO1_8 */
-				982  0x80000000	/* MX53_PAD_PATA_DATA14__GPIO2_14 */
-				989  0x80000000	/* MX53_PAD_PATA_DATA15__GPIO2_15 */
-				693  0x80000000	/* MX53_PAD_EIM_DA11__GPIO3_11 */
-				697  0x80000000	/* MX53_PAD_EIM_DA12__GPIO3_12 */
-				701  0x80000000	/* MX53_PAD_EIM_DA13__GPIO3_13 */
-				868  0x80000000	/* MX53_PAD_PATA_DA_0__GPIO7_6 */
-				1149 0x80000000 /* MX53_PAD_GPIO_16__GPIO7_11 */
+				MX53_PAD_GPIO_0__CCM_SSI_EXT1_CLK 0x80000000
+				MX53_PAD_GPIO_8__GPIO1_8          0x80000000
+				MX53_PAD_PATA_DATA14__GPIO2_14    0x80000000
+				MX53_PAD_PATA_DATA15__GPIO2_15    0x80000000
+				MX53_PAD_EIM_DA11__GPIO3_11       0x80000000
+				MX53_PAD_EIM_DA12__GPIO3_12       0x80000000
+				MX53_PAD_EIM_DA13__GPIO3_13       0x80000000
+				MX53_PAD_PATA_DA_0__GPIO7_6       0x80000000
+				MX53_PAD_GPIO_16__GPIO7_11        0x80000000
 			>;
 		};
 
 		led_pin_gpio7_7: led_gpio7_7@0 {
 			fsl,pins = <
-				873  0x80000000	/* MX53_PAD_PATA_DA_1__GPIO7_7 */
+				MX53_PAD_PATA_DA_1__GPIO7_7 0x80000000
 			>;
 		};
 	};

arch/arm/boot/dts/imx6q-sabreauto.dts

@@ -29,8 +29,8 @@ &iomuxc {
 	hog {
 		pinctrl_hog: hoggrp {
 			fsl,pins = <
-				1376 0x80000000	/* MX6Q_PAD_NANDF_CS2__GPIO_6_15 */
-				13   0x80000000	/* MX6Q_PAD_SD2_DAT2__GPIO_1_13 */
+				MX6Q_PAD_NANDF_CS2__GPIO6_IO15 0x80000000
+				MX6Q_PAD_SD2_DAT2__GPIO1_IO13  0x80000000
 			>;
 		};
 	};