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path: root/drivers/irqchip/irq-imx-irqsteer.c
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2020-09-13irqchip/imx-irqsteer: Use dev_err_probe() to simplify error handlingAnson Huang1-6/+3
dev_err_probe() can reduce code size, uniform error handling and record the defer probe reason etc., use it to simplify the code. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/1597126576-18383-2-git-send-email-Anson.Huang@nxp.com
2019-04-29irqchip/imx-irqsteer: Use devm_platform_ioremap_resource() to simplify codeAnson Huang1-3/+1
Use the new helper devm_platform_ioremap_resource() which wraps the platform_get_resource() and devm_ioremap_resource() together, to simplify the code. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-03-05irqchip/imx-irqsteer: Fix of_property_read_u32() error handlingArnd Bergmann1-2/+6
gcc points out that irqs_num is not initialized when of_property_read_u32() is an empty stub function: Included from drivers/irqchip/irq-imx-irqsteer.c:7: drivers/irqchip/irq-imx-irqsteer.c: In function 'imx_irqsteer_probe': include/uapi/linux/kernel.h:13:49: error: 'irqs_num' may be used uninitialized in this function [-Werror=maybe-uninitialized] The same can actually happen with CONFIG_OF=y as well, though we don't get a warning then. Add error checking here that lets the code deal with missing or invalid properties as well as avoid the warning. Fixes: 28528fca4908 ("irqchip/imx-irqsteer: Add multi output interrupts support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-02-22irqchip/imx-irqsteer: Add multi output interrupts supportAisheng Dong1-20/+68
One irqsteer channel can support up to 8 output interrupts. Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Shawn Guo <shawnguo@kernel.org> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-02-22irqchip/imx-irqsteer: Change to use reg_num instead of irq_groupAisheng Dong1-16/+19
One group can manage 64 interrupts by using two registers (e.g. STATUS/SET). However, the integrated irqsteer may support only 32 interrupts which needs only one register in a group. But the current driver assume there's a mininum of two registers in a group which result in a wrong register map for 32 interrupts per channel irqsteer. Let's use the reg_num caculated by interrupts per channel instead of irq_group to cover this case. Cc: Rob Herring <robh+dt@kernel.org> Cc: Shawn Guo <shawnguo@kernel.org> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-12-18irqchip: Add driver for imx-irqsteer controllerLucas Stach1-0/+261
The irqsteer block is a interrupt multiplexer/remapper found on the i.MX8 line of SoCs. Signed-off-by: Fugang Duan <fugang.duan@nxp.com> Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>