From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarkko Nikula Subject: [PATCH 1/6] i2c: designware: Remove interrupt clearing from i2c_dw_pci_probe() Date: Mon, 31 Aug 2015 17:31:28 +0300 Message-ID: <1441031493-18938-2-git-send-email-jarkko.nikula@linux.intel.com> References: <1441031493-18938-1-git-send-email-jarkko.nikula@linux.intel.com> Return-path: In-Reply-To: <1441031493-18938-1-git-send-email-jarkko.nikula-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Wolfram Sang , Jarkko Nikula List-Id: linux-i2c@vger.kernel.org There is no need to clear interrupts in i2c_dw_pci_probe() since only place where interrupts are unmasked is i2c_dw_xfer_init() and there interrupts are always cleared after commit 2a2d95e9d6d2 ("i2c: designware: always clear interrupts before enabling them"). This allows to cleanup the code and replace i2c_dw_clear_int() in i2c_dw_xfer_init() by direct register read as there are no other callers. Signed-off-by: Jarkko Nikula --- drivers/i2c/busses/i2c-designware-core.c | 8 +------- drivers/i2c/busses/i2c-designware-core.h | 1 - drivers/i2c/busses/i2c-designware-pcidrv.c | 1 - 3 files changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index 7441cdc1b34a..dec0af7d0471 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -438,7 +438,7 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) __i2c_dw_enable(dev, true); /* Clear and enable interrupts */ - i2c_dw_clear_int(dev); + dw_readl(dev, DW_IC_CLR_INTR); dw_writel(dev, DW_IC_INTR_DEFAULT_MASK, DW_IC_INTR_MASK); } @@ -839,12 +839,6 @@ void i2c_dw_disable(struct dw_i2c_dev *dev) } EXPORT_SYMBOL_GPL(i2c_dw_disable); -void i2c_dw_clear_int(struct dw_i2c_dev *dev) -{ - dw_readl(dev, DW_IC_CLR_INTR); -} -EXPORT_SYMBOL_GPL(i2c_dw_clear_int); - void i2c_dw_disable_int(struct dw_i2c_dev *dev) { dw_writel(dev, 0, DW_IC_INTR_MASK); diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index 9630222abf32..f44aeeeb91c6 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -122,7 +122,6 @@ extern irqreturn_t i2c_dw_isr(int this_irq, void *dev_id); extern void i2c_dw_enable(struct dw_i2c_dev *dev); extern u32 i2c_dw_is_enabled(struct dw_i2c_dev *dev); extern void i2c_dw_disable(struct dw_i2c_dev *dev); -extern void i2c_dw_clear_int(struct dw_i2c_dev *dev); extern void i2c_dw_disable_int(struct dw_i2c_dev *dev); extern u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev); diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index df23e8c30e6f..e477dddcdae5 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -268,7 +268,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, } i2c_dw_disable_int(dev); - i2c_dw_clear_int(dev); r = i2c_add_numbered_adapter(adap); if (r) { dev_err(&pdev->dev, "failure adding adapter\n"); -- 2.5.0