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>
diff --git a/arch/arm/boot/dts/imx53-evk.dts b/arch/arm/boot/dts/imx53-evk.dts
index f96a426..801fda7 100644
--- a/arch/arm/boot/dts/imx53-evk.dts
+++ b/arch/arm/boot/dts/imx53-evk.dts
@@ -82,14 +82,14 @@
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
>;
};
};