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FDT gpio drivers have an extra .xlate operation, so they need to embed
the `struct fdt_driver` inside the subsystem-specific type. The gpio
subsystem always initializes the driver for a specific DT node.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Since the FDT is not modified during driver initialization, node offsets
are just as suitable as phandles for use as identifiers: they are stable
and unique. With this change, it is no longer necessary to pass the
phandle to the driver init functions, so these init functions now use
the same prototype as other kinds of drivers.
This matches what is already done for I2C adapters.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Indicate that none of these functions modify the devicetree by
constifying the parameter type.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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In starfive_gpio_direction_output() readl() is called twice to read the
gpio direction register. The result of the first read is discarded.
Remove the redundant read.
Fixes: 908be1b85c8f ("gpio/starfive: add gpio driver and support gpio reset")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Let's use heap allocation in SiFive and Starfive GPIO drivers
instead of using a fixed size global array.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
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Add gpio driver and gpio reset function in Starfive
JH7110 SOC platform.
Signed-off-by: minda.chen <minda.chen@starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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