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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: MGxCmRXuCb3qzfRPvT9XywyUAoCqFIibUuoSp7uxQ/NLq39PvaNrtkWJB1tDiUAHRj4x6/WJQDkfzeiWcmoxUZLNICjUy0YKlE0AIN6x2PcqX3OoksC7EEJ2vmOx4OWj1+YGmLOa296Hs++nAqpNLkNk+UtE1TfdEbpqdzRgGFMkqmETbYAlH52ycQcm5RoieKjTZOOUjMNz0Ndzpkh/7T5jp3krUCCKlZbg59NP89f55B5zZmxrwzCdPmFbQp9xGWrB4sgc4QCQa2QwIN4EWXQc7I01QgXclsboLdjurkYcbmMBtxxFOyWyjcyeoEAc/FAJB6gkLYJhjV6hNJliqv28P1nq74PvymQAByH7sJcJFA9CZfhpHq4bBlHEsNPcbE2CYx47x2GF+8A8siG7x7TL3XMBN8p/5U62go8Cdn6KJYZ8NEg2hysGMESRx9NA Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5261280d-39e0-4170-7741-08d768b41333 X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Nov 2019 03:38:12.5734 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: aug73e5oa+2yFhkQBDj6vi54aYLE2Ctp+sau1vkPE+o6irnQhgiYuM5dgJQ2kNByclcNDlZLLgAZjpRtMkn92Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB4994 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peng Fan writel has a barrier, however that barrier is not needed, because device memory mapping is nGnRE mapping and access is in order and clk driver has spin lock or other lock to make sure write finished. Cc: Will Deacon Signed-off-by: Peng Fan --- drivers/clk/imx/clk-pll14xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c index 5778f3bfb339..5b7d41d43b3b 100644 --- a/drivers/clk/imx/clk-pll14xx.c +++ b/drivers/clk/imx/clk-pll14xx.c @@ -199,7 +199,7 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, uns= igned long drate, =20 /* Enable BYPASS */ tmp |=3D BYPASS_MASK; - writel(tmp, pll->base); + writel_relaxed(tmp, pll->base); =20 div_val =3D (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) | (rate->sdiv << SDIV_SHIFT); --=20 2.16.4 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B37DC432C3 for ; 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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 From: Peng Fan writel has a barrier, however that barrier is not needed, because device memory mapping is nGnRE mapping and access is in order and clk driver has spin lock or other lock to make sure write finished. Cc: Will Deacon Signed-off-by: Peng Fan --- drivers/clk/imx/clk-pll14xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c index 5778f3bfb339..5b7d41d43b3b 100644 --- a/drivers/clk/imx/clk-pll14xx.c +++ b/drivers/clk/imx/clk-pll14xx.c @@ -199,7 +199,7 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate, /* Enable BYPASS */ tmp |= BYPASS_MASK; - writel(tmp, pll->base); + writel_relaxed(tmp, pll->base); div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) | (rate->sdiv << SDIV_SHIFT); -- 2.16.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel