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Thu, 07 Nov 2019 09:48:23 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id D1AA110006A; Thu, 7 Nov 2019 09:48:03 +0100 (CET) Received: from Webmail-eu.st.com (Safex1hubcas24.st.com [10.75.90.94]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id C2C2A2AA977; Thu, 7 Nov 2019 09:48:03 +0100 (CET) Received: from SAFEX1HUBCAS21.st.com (10.75.90.45) by Safex1hubcas24.st.com (10.75.90.94) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 7 Nov 2019 09:48:03 +0100 Received: from localhost (10.201.22.222) by Webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 7 Nov 2019 09:48:03 +0100 From: Christophe Roullier To: , , , , , , Subject: [PATCH V4 net-next 1/4] net: ethernet: stmmac: Add support for syscfg clock Date: Thu, 7 Nov 2019 09:47:54 +0100 Message-ID: <20191107084757.17910-2-christophe.roullier@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191107084757.17910-1-christophe.roullier@st.com> References: <20191107084757.17910-1-christophe.roullier@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.22.222] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-07_02:2019-11-07,2019-11-07 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191107_004834_792711_CFC1743E X-CRM114-Status: GOOD ( 16.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, andrew@lunn.ch, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, christophe.roullier@st.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add optional support for syscfg clock in dwmac-stm32.c Now Syscfg clock is activated automatically when syscfg registers are used Signed-off-by: Christophe Roullier --- .../net/ethernet/stmicro/stmmac/dwmac-stm32.c | 23 +++++++------------ 1 file changed, 8 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c index 4ef041bdf6a1..9e4180e1683f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c @@ -155,18 +155,14 @@ static int stm32mp1_clk_prepare(struct stm32_dwmac *dwmac, bool prepare) ret = clk_prepare_enable(dwmac->syscfg_clk); if (ret) return ret; - - if (dwmac->clk_eth_ck) { - ret = clk_prepare_enable(dwmac->clk_eth_ck); - if (ret) { - clk_disable_unprepare(dwmac->syscfg_clk); + ret = clk_prepare_enable(dwmac->clk_eth_ck); + if (ret) { + clk_disable_unprepare(dwmac->syscfg_clk); return ret; - } } } else { clk_disable_unprepare(dwmac->syscfg_clk); - if (dwmac->clk_eth_ck) - clk_disable_unprepare(dwmac->clk_eth_ck); + clk_disable_unprepare(dwmac->clk_eth_ck); } return ret; } @@ -320,12 +316,10 @@ static int stm32mp1_parse_data(struct stm32_dwmac *dwmac, return PTR_ERR(dwmac->clk_ethstp); } - /* Clock for sysconfig */ + /* Optional Clock for sysconfig */ dwmac->syscfg_clk = devm_clk_get(dev, "syscfg-clk"); - if (IS_ERR(dwmac->syscfg_clk)) { - dev_err(dev, "No syscfg clock provided...\n"); - return PTR_ERR(dwmac->syscfg_clk); - } + if (IS_ERR(dwmac->syscfg_clk)) + dwmac->syscfg_clk = NULL; /* Get IRQ information early to have an ability to ask for deferred * probe if needed before we went too far with resource allocation. @@ -437,8 +431,7 @@ static int stm32mp1_suspend(struct stm32_dwmac *dwmac) clk_disable_unprepare(dwmac->clk_tx); clk_disable_unprepare(dwmac->syscfg_clk); - if (dwmac->clk_eth_ck) - clk_disable_unprepare(dwmac->clk_eth_ck); + clk_disable_unprepare(dwmac->clk_eth_ck); return ret; } -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel