From 38b6686f05d4609334b5796bc352ec01d54c5eb4 Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Thu, 18 Oct 2018 14:28:28 +0200 Subject: pinctrl: Add pinctrl driver for i.MX8 Add pinctrl driver for i.MX8. The pads configuration is controlled by SCU, so need to ask SCU to configure pads through scfw API. Add pinctrl-scu to invoke sc_pad_set to configure pads. Add a new flag IMX8_USE_SCU to differentiate i.MX8 from other platforms which could directly configure pads from Acore side. Add CONFIG_PINCTRL_IMX8 as the built gate. Signed-off-by: Peng Fan Reviewed-by: Anatolij Gustschin Cc: Stefano Babic --- drivers/pinctrl/nxp/pinctrl-scu.c | 66 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 drivers/pinctrl/nxp/pinctrl-scu.c (limited to 'drivers/pinctrl/nxp/pinctrl-scu.c') diff --git a/drivers/pinctrl/nxp/pinctrl-scu.c b/drivers/pinctrl/nxp/pinctrl-scu.c new file mode 100644 index 0000000000..aa11075e0a --- /dev/null +++ b/drivers/pinctrl/nxp/pinctrl-scu.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 NXP + */ + +#include +#include +#include +#include +#include +#include + +#include "pinctrl-imx.h" + +#define PADRING_IFMUX_EN_SHIFT 31 +#define PADRING_IFMUX_EN_MASK BIT(31) +#define PADRING_GP_EN_SHIFT 30 +#define PADRING_GP_EN_MASK BIT(30) +#define PADRING_IFMUX_SHIFT 27 +#define PADRING_IFMUX_MASK GENMASK(29, 27) + +static int imx_pinconf_scu_set(struct imx_pinctrl_soc_info *info, u32 pad, + u32 mux, u32 val) +{ + int ret; + + /* + * Mux should be done in pmx set, but we do not have a good api + * to handle that in scfw, so config it in pad conf func + */ + + val |= PADRING_IFMUX_EN_MASK; + val |= PADRING_GP_EN_MASK; + val |= (mux << PADRING_IFMUX_SHIFT) & PADRING_IFMUX_MASK; + + ret = sc_pad_set(-1, pad, val); + if (ret) + printf("%s %d\n", __func__, ret); + + return 0; +} + +int imx_pinctrl_scu_conf_pins(struct imx_pinctrl_soc_info *info, u32 *pin_data, + int npins) +{ + int pin_id, mux, config_val; + int i, j = 0; + int ret; + + /* + * Refer to linux documentation for details: + * Documentation/devicetree/bindings/pinctrl/fsl,imx-pinctrl.txt + */ + for (i = 0; i < npins; i++) { + pin_id = pin_data[j++]; + mux = pin_data[j++]; + config_val = pin_data[j++]; + + ret = imx_pinconf_scu_set(info, pin_id, mux, config_val); + if (ret) + printf("Set pin %d, mux %d, val %d, error\n", pin_id, + mux, config_val); + } + + return 0; +} -- cgit