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745df68d36
Introduce pinctrl for i.MX6
1. pinctrl-imx.c is for common usage. It's used by i.MX6/7.
2. Add PINCTRL_IMX PINCTRL_IMX6 Kconfig entry.
3. To the pinctrl_ops implementation, only set_state is implemented.
To i.MX6/7, the pinctrl dts entry is as following:
&iomuxc {
pinctrl-names = "default";
pinctrl_csi1: csi1grp {
fsl,pins = <
MX6UL_PAD_CSI_MCLK__CSI_MCLK 0x1b088
MX6UL_PAD_CSI_PIXCLK__CSI_PIXCLK 0x1b088
MX6UL_PAD_CSI_VSYNC__CSI_VSYNC 0x1b088
>;
};
[.....]
};
there is no property named function or groups. So pinctrl_generic_set_state
can not be used here.
5. This driver is a simple implementation for i.mx iomux controller,
only parse the fsl,pins property and write value to registers.
6. With DEBUG enabled, we can see log when "i2c bus 0":
"
set_state_simple op missing
imx_pinctrl_set_state: i2c1grp
mux_reg 0x14c, conf_reg 0x3bc, input_reg 0x5d8, mux_mode 0x0, input_val 0x1, config_val 0x4000007f
write mux: offset 0x14c val 0x10
select_input: offset 0x5d8 val 0x1
write config: offset 0x3bc val 0x7f
mux_reg 0x148, conf_reg 0x3b8, input_reg 0x5d4, mux_mode 0x0, input_val 0x1, config_val 0x4000007f
write mux: offset 0x148 val 0x10
select_input: offset 0x5d4 val 0x1
write config: offset 0x3b8 val 0x7f
"
this means imx6 pinctrl driver works as expected.
Signed-off-by: Peng Fan <van.freenix@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
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/*
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* Copyright (C) 2016 Peng Fan <van.freenix@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <dm/device.h>
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#include <dm/pinctrl.h>
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#include "pinctrl-imx.h"
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static struct imx_pinctrl_soc_info imx6_pinctrl_soc_info;
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static int imx6_pinctrl_probe(struct udevice *dev)
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{
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struct imx_pinctrl_soc_info *info =
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(struct imx_pinctrl_soc_info *)dev_get_driver_data(dev);
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return imx_pinctrl_probe(dev, info);
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}
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static const struct udevice_id imx6_pinctrl_match[] = {
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{ .compatible = "fsl,imx6q-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
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{ .compatible = "fsl,imx6dl-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
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{ .compatible = "fsl,imx6sl-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
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{ .compatible = "fsl,imx6sx-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
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{ .compatible = "fsl,imx6ul-iomuxc", .data = (ulong)&imx6_pinctrl_soc_info },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(imx6_pinctrl) = {
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.name = "imx6-pinctrl",
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.id = UCLASS_PINCTRL,
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.of_match = of_match_ptr(imx6_pinctrl_match),
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.probe = imx6_pinctrl_probe,
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.remove = imx_pinctrl_remove,
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.priv_auto_alloc_size = sizeof(struct imx_pinctrl_priv),
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.ops = &imx_pinctrl_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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