Messages in this thread | | | Date | Thu, 9 Jun 2016 15:47:40 +0100 | From | Lee Jones <> | Subject | Re: [PATCH 2/2] mfd: max77620: Add pre/post irq handler before/after servicing interrupt |
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On Wed, 08 Jun 2016, Laxman Dewangan wrote:
> Hi Lee, > > On Wednesday 08 June 2016 08:11 PM, Lee Jones wrote: > >On Fri, 20 May 2016, Laxman Dewangan wrote: > > > >>+ * MAX77620 and MAX20024 has the following steps of the interrupt handling > >>+ * for TOP interrupts: > >>+ * 1. When interrupt occurs from PMIC, mask the PMIC interrupt by setting GLBLM. > >>+ * 2. Read IRQTOP and service the interrupt. > >>+ * 3. Once all interrupts has been checked and serviced, the interrupt service > >>+ * routine un-masks the hardware interrupt line by clearing GLBLM. > >>+ */ > >>+static int max77620_top_irq_chip_pre_irq_handler(void *irq_drv_data) > >>+{ > >>+ struct max77620_chip *chip = irq_drv_data; > >>+ int ret; > >>+ > >>+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT, > >>+ MAX77620_GLBLM_MASK, MAX77620_GLBLM_MASK); > >>+ if (ret < 0) > >>+ dev_err(chip->dev, "Failed to set GLBLM: %d\n", ret); > >>+ > >>+ return ret; > >>+} > >>+ > >>+static int max77620_top_irq_chip_post_irq_handler(void *irq_drv_data) > >>+{ > >>+ struct max77620_chip *chip = irq_drv_data; > >>+ int ret; > >>+ > >>+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT, > >>+ MAX77620_GLBLM_MASK, 0); > >>+ if (ret < 0) > >>+ dev_err(chip->dev, "Failed to reset GLBLM: %d\n", ret); > >>+ > >>+ return ret; > >>+} > >This seems massively over compacted. All you're effectively doing > >here is masking and unmasking the IRQs, which we do almost > >ubiquitously with interrupt controllers. Can't you just call the > >functions "max77629_{un}mask_irqs()"? > > > > > > Actually, per PMIC HW design, we need to toggle this bit on ISRs. Before > reading the status, need to set 1 and then after handling it need to set 0. > This cannot be done by any other bit toggling or masking/unmasking interrupt > controller interrupt. > > This is hard requirement from the PMIC chip.
I'm fine with the implementation, just rename the functions to something less descriptive. I suggested a suitable simplified alternative above.
-- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
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