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pinctrl: imx: Introduce pinctrl driver for i.MX6
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>
9 years ago
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config PINCTRL_IMX
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bool
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config PINCTRL_IMX6
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bool "IMX6 pinctrl driver"
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depends on ARCH_MX6 && PINCTRL_FULL
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select DEVRES
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select PINCTRL_IMX
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help
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Say Y here to enable the imx6 pinctrl driver
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This provides a simple pinctrl driver for i.MX6 SoC familiy,
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i.MX6DQ/SL/SX/UL/DQP. This feature depends on device tree
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configuration. This driver is different from the linux one,
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this is a simple implementation, only parses the 'fsl,pins'
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property and configure related registers.
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config PINCTRL_IMX7
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bool "IMX7 pinctrl driver"
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depends on ARCH_MX7 && PINCTRL_FULL
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select DEVRES
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select PINCTRL_IMX
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help
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Say Y here to enable the imx7 pinctrl driver
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This provides a simple pinctrl driver for i.MX7 SoC familiy,
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i.MX7D. This feature depends on device tree
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configuration. This driver is different from the linux one,
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this is a simple implementation, only parses the 'fsl,pins'
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property and configure related registers.
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