From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752282AbeC2S7m (ORCPT ); Thu, 29 Mar 2018 14:59:42 -0400 Received: from fallback5.mail.ru ([94.100.181.253]:54398 "EHLO fallback.mail.ru" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751151AbeC2S7i (ORCPT ); Thu, 29 Mar 2018 14:59:38 -0400 From: Sergey Suloev To: Mark Brown , Maxime Ripard , Chen-Yu Tsai Cc: linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sergey Suloev Subject: [PATCH 5/6] spi: sun4i: introduce register set/unset helpers Date: Thu, 29 Mar 2018 21:59:06 +0300 Message-Id: <20180329185907.27281-6-ssuloev@orpaltech.com> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180329185907.27281-1-ssuloev@orpaltech.com> References: <20180329185907.27281-1-ssuloev@orpaltech.com> X-7FA49CB5: 0D63561A33F958A55778B6CBB183EA6FA67B693F76D0AEE7F409322A2F59C95C725E5C173C3A84C3ADE50F0DA4A4E48C53333C6F2D013B24463FC242DBD691A6C4224003CC836476C0CAF46E325F83A50BF2EBBBDD9D6B0F05F538519369F3743B503F486389A921A5CC5B56E945C8DA X-Mailru-Sender: C5364AD02485212F3ACDC11E67D84917D3AC8FC500FE72F639A6197812DC186E069BFC61DABEEB110841D3AAAB1726C63DDE9B364B0DF289264D2CD8C2503E8C22A194DADEED8EEDCA01A23BA9CD1BE7ED14614B50AE0675 X-Mras: OK X-Mras: OK Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Two helper functions were added in order to update registers easily. Signed-off-by: Sergey Suloev --- drivers/spi/spi-sun4i.c | 40 +++++++++++++++++++--------------------- 1 file changed, 19 insertions(+), 21 deletions(-) diff --git a/drivers/spi/spi-sun4i.c b/drivers/spi/spi-sun4i.c index 4f24e12..fc913d4 100644 --- a/drivers/spi/spi-sun4i.c +++ b/drivers/spi/spi-sun4i.c @@ -107,29 +107,29 @@ static inline void sun4i_spi_write(struct sun4i_spi *sspi, u32 reg, u32 value) writel(value, sspi->base_addr + reg); } -static inline u32 sun4i_spi_get_tx_fifo_count(struct sun4i_spi *sspi) +static inline void sun4i_spi_set(struct sun4i_spi *sspi, u32 addr, u32 val) { - u32 reg = sun4i_spi_read(sspi, SUN4I_FIFO_STA_REG); - - reg >>= SUN4I_FIFO_STA_TF_CNT_BITS; + u32 reg = sun4i_spi_read(sspi, addr); - return reg & SUN4I_FIFO_STA_TF_CNT_MASK; + reg |= val; + sun4i_spi_write(sspi, addr, reg); } -static inline void sun4i_spi_enable_interrupt(struct sun4i_spi *sspi, u32 mask) +static inline void sun4i_spi_unset(struct sun4i_spi *sspi, u32 addr, u32 val) { - u32 reg = sun4i_spi_read(sspi, SUN4I_INT_CTL_REG); + u32 reg = sun4i_spi_read(sspi, addr); - reg |= mask; - sun4i_spi_write(sspi, SUN4I_INT_CTL_REG, reg); + reg &= ~val; + sun4i_spi_write(sspi, addr, reg); } -static inline void sun4i_spi_disable_interrupt(struct sun4i_spi *sspi, u32 mask) +static inline u32 sun4i_spi_get_tx_fifo_count(struct sun4i_spi *sspi) { - u32 reg = sun4i_spi_read(sspi, SUN4I_INT_CTL_REG); + u32 reg = sun4i_spi_read(sspi, SUN4I_FIFO_STA_REG); - reg &= ~mask; - sun4i_spi_write(sspi, SUN4I_INT_CTL_REG, reg); + reg >>= SUN4I_FIFO_STA_TF_CNT_BITS; + + return reg & SUN4I_FIFO_STA_TF_CNT_MASK; } static inline void sun4i_spi_drain_fifo(struct sun4i_spi *sspi, int len) @@ -256,13 +256,12 @@ static int sun4i_spi_transfer_one(struct spi_master *master, /* Clear pending interrupts */ sun4i_spi_write(sspi, SUN4I_INT_STA_REG, ~0); + /* Reset FIFOs */ + sun4i_spi_set(sspi, SUN4I_CTL_REG, + SUN4I_CTL_RF_RST | SUN4I_CTL_TF_RST); reg = sun4i_spi_read(sspi, SUN4I_CTL_REG); - /* Reset FIFOs */ - sun4i_spi_write(sspi, SUN4I_CTL_REG, - reg | SUN4I_CTL_RF_RST | SUN4I_CTL_TF_RST); - /* * Setup the transfer control register: Chip Select, * polarities, etc. @@ -341,12 +340,11 @@ static int sun4i_spi_transfer_one(struct spi_master *master, */ sun4i_spi_fill_fifo(sspi, SUN4I_FIFO_DEPTH); - /* Enable the transfer complete interrupt */ - sun4i_spi_enable_interrupt(sspi, SUN4I_INT_CTL_TC); + /* Enable transfer complete interrupt */ + sun4i_spi_set(sspi, SUN4I_INT_CTL_REG, SUN4I_INT_CTL_TC); /* Start the transfer */ - reg = sun4i_spi_read(sspi, SUN4I_CTL_REG); - sun4i_spi_write(sspi, SUN4I_CTL_REG, reg | SUN4I_CTL_XCH); + sun4i_spi_set(sspi, SUN4I_CTL_REG, SUN4I_CTL_XCH); ret = sun4i_spi_wait_for_transfer(spi, tfr); -- 2.16.2