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[ Upstream commit bf0d394e885015941ed2d5724c0a6ed8d42dd95e ]
Currently, the IRQ setup for the SGPIO driver enables all interrupts in
dual-edge trigger mode. Since the default handler is handle_bad_irq, any
state change on input GPIOs will trigger bad IRQ warnings.
This change applies sensible IRQ defaults: single-edge trigger, and all
IRQs disabled.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae79b ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit ac67b07e268d46eba675a60c37051bb3e59fd201 ]
Currently, the aspeed-sgpio driver exposes up to 80 GPIO lines,
corresponding to the 80 status bits available in hardware. Each of these
lines can be configured as either an input or an output.
However, each of these GPIOs is actually an input *and* an output; we
actually have 80 inputs plus 80 outputs.
This change expands the maximum number of GPIOs to 160; the lower half
of this range are the input-only GPIOs, the upper half are the outputs.
We fix the GPIO directions to correspond to this mapping.
This also fixes a bug when setting GPIOs - we were reading from the
input register, making it impossible to set more than one output GPIO.
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Fixes: 7db47faae79b ("gpio: aspeed: Add SGPIO driver")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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[ Upstream commit 11e299de3aced4ea23a9fb1fef6c983c8d516302 ]
gcc has a hard time tracking whether BUG_ON(1) ends
execution or not:
drivers/gpio/gpio-aspeed-sgpio.c: In function 'bank_reg':
drivers/gpio/gpio-aspeed-sgpio.c:112:1: error: control reaches end of non-void function [-Werror=return-type]
Use the simpler BUG() that gcc knows cannot continue.
Fixes: f8b410e3695a ("gpio: aspeed-sgpio: Rename and add Kconfig/Makefile")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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Add SGPIO driver support for Aspeed AST2500 SoC.
Signed-off-by: Hongwei Zhang <hongweiz@ami.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/1566335128-31498-2-git-send-email-hongweiz@ami.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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