[RFC PATCH 2/3] pinctrl: imx: add pinmux-imx53 support
Linus Walleij
linus.walleij at linaro.org
Mon Dec 5 11:57:42 EST 2011
On Sun, Dec 4, 2011 at 12:49 PM, Dong Aisheng <b29396 at freescale.com> wrote:
> +enum imx_mx53_pads {
> + MX53_GPIO_19 = 0,
> + MX53_KEY_COL0 = 1,
(...)
First I thought it looked a bit strange since you needed enums for all pads
but then I realized that your macros use the same enumerator name to
name the pad and then it looks sort of clever.
But maybe put in a comment about that here:
> +/* Pad names for the pinmux subsystem */
Like this:
/*
* Pad names for the pinmux subsystem.
* These pad names are constructed from the pin enumerator names
* in the IMX_PINCTRL_PIN() macro.
*/
> +static const struct pinctrl_pin_desc mx53_pads[] = {
> + IMX_PINCTRL_PIN(MX53_GPIO_19),
> + IMX_PINCTRL_PIN(MX53_KEY_COL0),
(...)
> +/* mx53 pin groups and mux mode */
> +static const unsigned mx53_fec_pins[] = {
> + MX53_FEC_MDC,
> + MX53_FEC_MDIO,
> + MX53_FEC_REF_CLK,
> + MX53_FEC_RX_ER,
> + MX53_FEC_CRS_DV,
> + MX53_FEC_RXD1,
> + MX53_FEC_RXD0,
> + MX53_FEC_TX_EN,
> + MX53_FEC_TXD1,
> + MX53_FEC_TXD0,
> +};
I understand this.
> +static const unsigned mx53_fec_mux[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
But what is this? Just zeroes? Why?
Especially with a const so they really cannot be anything
else. The same pin (0) can only be enumerated once.
> +static const unsigned mx53_sd1_pins[] = {
> + MX53_SD1_CMD,
> + MX53_SD1_CLK,
> + MX53_SD1_DATA0,
> + MX53_SD1_DATA1,
> + MX53_SD1_DATA2,
> + MX53_SD1_DATA3,
> +
> +};
> +static const unsigned mx53_sd1_mux[] = { 0, 0, 0, 0, 0, 0 };
And here again.
> +static const unsigned mx53_sd3_pins[] = {
> + MX53_PATA_DATA8,
> + MX53_PATA_DATA9,
> + MX53_PATA_DATA10,
> + MX53_PATA_DATA11,
> + MX53_PATA_DATA0,
> + MX53_PATA_DATA1,
> + MX53_PATA_DATA2,
> + MX53_PATA_DATA3,
> + MX53_PATA_IORDY,
> + MX53_PATA_RESET_B,
> +
> +};
> +static const unsigned mx53_sd3_mux[] = { 4, 4, 4, 4, 4, 4, 4, 4, 2, 2 };
This also looks strange. Can you explain what these muxes are?
> +static const unsigned mx53_uart1_pins[] = {
> + MX53_CSI0_DAT10,
> + MX53_CSI0_DAT11,
> +};
> +static const unsigned mx53_uart1_mux[] = { 2, 2 };
And here again?
> +static const struct imx_pin_group mx53_pin_groups[] = {
> + IMX_PIN_GROUP("fecgrp", mx53_fec_pins, mx53_fec_mux),
> + IMX_PIN_GROUP("sd1grp", mx53_sd1_pins, mx53_sd1_mux),
> + IMX_PIN_GROUP("sd3grp", mx53_sd3_pins, mx53_sd3_mux),
> + IMX_PIN_GROUP("uart1grp", mx53_uart1_pins, mx53_uart1_mux),
> +};
So I understand the first and second argument to IMX_PIN_GROUP()
but not the third.
> +/* mx53 funcs and groups */
> +static const char * const fecgrps[] = { "fecgrp" };
> +static const char * const sd1grps[] = { "sd1grp" };
> +static const char * const sd3grps[] = { "sd3grp" };
> +static const char * const uart1grps[] = { "uart1grp" };
> +
> +static const struct imx_pmx_func mx53_pmx_functions[] = {
> + IMX_PMX_FUNC("fec", fecgrps),
> + IMX_PMX_FUNC("sd1", sd1grps),
> + IMX_PMX_FUNC("sd3", sd3grps),
> + IMX_PMX_FUNC("uart1", uart1grps),
> +};
This looks good.
Yours,
Linus Walleij
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