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GET /api/patches/814301/?format=api
{ "id": 814301, "url": "http://patchwork.ozlabs.org/api/patches/814301/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/patch/20170915140411.31716-8-romain.izard.pro@gmail.com/", "project": { "id": 3, "url": "http://patchwork.ozlabs.org/api/projects/3/?format=api", "name": "Linux MTD development", "link_name": "linux-mtd", "list_id": "linux-mtd.lists.infradead.org", "list_email": "linux-mtd@lists.infradead.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170915140411.31716-8-romain.izard.pro@gmail.com>", "list_archive_url": null, "date": "2017-09-15T14:04:09", "name": "[v2,7/9] pwm: atmel-tcb: Support backup mode", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "93c682676178439e5c82911415f64b6a91550c07", "submitter": { "id": 8236, "url": "http://patchwork.ozlabs.org/api/people/8236/?format=api", "name": "Romain Izard", "email": "romain.izard.pro@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-mtd/patch/20170915140411.31716-8-romain.izard.pro@gmail.com/mbox/", "series": [ { "id": 3316, "url": "http://patchwork.ozlabs.org/api/series/3316/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/list/?series=3316", "date": "2017-09-15T14:04:02", "name": "Various patches for SAMA5D2 backup mode", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/3316/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/814301/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/814301/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org; 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\n\tFri, 15 Sep 2017 07:05:19 -0700 (PDT)", "From": "Romain Izard <romain.izard.pro@gmail.com>", "To": "Nicolas Ferre <nicolas.ferre@microchip.com>,\n\tAlexandre Belloni <alexandre.belloni@free-electrons.com>,\n\tBoris Brezillon <boris.brezillon@free-electrons.com>,\n\tMichael Turquette <mturquette@baylibre.com>,\n\tStephen Boyd <sboyd@codeaurora.org>,\n\tLudovic Desroches <ludovic.desroches@microchip.com>,\n\tWenyou Yang <wenyou.yang@atmel.com>, Josh Wu <rainyfeeling@outlook.com>, \n\tDavid Woodhouse <dwmw2@infradead.org>,\n\tBrian Norris <computersforpeace@gmail.com>,\n\tMarek Vasut <marek.vasut@gmail.com>,\n\tCyrille Pitchen <cyrille.pitchen@wedev4u.fr>,\n\tThierry Reding <thierry.reding@gmail.com>,\n\tRichard Genoud <richard.genoud@gmail.com>,\n\tGreg Kroah-Hartman <gregkh@linuxfoundation.org>,\n\tAlan Stern <stern@rowland.harvard.edu>", "Subject": "[PATCH v2 7/9] pwm: atmel-tcb: Support backup mode", "Date": "Fri, 15 Sep 2017 16:04:09 +0200", "Message-Id": "<20170915140411.31716-8-romain.izard.pro@gmail.com>", "X-Mailer": "git-send-email 2.11.0", "In-Reply-To": "<20170915140411.31716-1-romain.izard.pro@gmail.com>", "References": "<20170915140411.31716-1-romain.izard.pro@gmail.com>", "X-CRM114-Version": "20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ", "X-CRM114-CacheID": "sfid-20170915_070541_881901_339A4F34 ", "X-CRM114-Status": "GOOD ( 15.91 )", "X-Spam-Score": "-2.0 (--)", "X-Spam-Report": "SpamAssassin version 3.4.1 on bombadil.infradead.org summary:\n\tContent analysis details: (-2.0 points)\n\tpts rule name description\n\t---- ----------------------\n\t--------------------------------------------------\n\t-0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/,\n\tno\n\ttrust [2a00:1450:400c:c09:0:0:0:243 listed in] [list.dnswl.org]\n\t-0.0 SPF_PASS SPF: sender matches SPF record\n\t0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail\n\tprovider (romain.izard.pro[at]gmail.com)\n\t-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n\t[score: 0.0000]\n\t-0.1 DKIM_VALID Message has at least one valid DKIM or DK signature\n\t0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n\tnot necessarily valid\n\t-0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n\tauthor's domain", "X-BeenThere": "linux-mtd@lists.infradead.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>", "List-Unsubscribe": "<http://lists.infradead.org/mailman/options/linux-mtd>,\n\t<mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>", "List-Archive": "<http://lists.infradead.org/pipermail/linux-mtd/>", "List-Post": "<mailto:linux-mtd@lists.infradead.org>", "List-Help": "<mailto:linux-mtd-request@lists.infradead.org?subject=help>", "List-Subscribe": "<http://lists.infradead.org/mailman/listinfo/linux-mtd>,\n\t<mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>", "Cc": "linux-pwm@vger.kernel.org, linux-usb@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,\n\tlinux-serial@vger.kernel.org, Romain Izard <romain.izard.pro@gmail.com>, \n\tlinux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Sender": "\"linux-mtd\" <linux-mtd-bounces@lists.infradead.org>", "Errors-To": "linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org" }, "content": "Save and restore registers for the PWM on suspend and resume, which\nmakes hibernation and backup modes possible.\n\nSigned-off-by: Romain Izard <romain.izard.pro@gmail.com>\n---\n drivers/pwm/pwm-atmel-tcb.c | 63 +++++++++++++++++++++++++++++++++++++++++++--\n 1 file changed, 61 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c\nindex 75db585a2a94..acd3ce8ecf3f 100644\n--- a/drivers/pwm/pwm-atmel-tcb.c\n+++ b/drivers/pwm/pwm-atmel-tcb.c\n@@ -37,11 +37,20 @@ struct atmel_tcb_pwm_device {\n \tunsigned period;\t\t/* PWM period expressed in clk cycles */\n };\n \n+struct atmel_tcb_channel {\n+\tu32 enabled;\n+\tu32 cmr;\n+\tu32 ra;\n+\tu32 rb;\n+\tu32 rc;\n+};\n+\n struct atmel_tcb_pwm_chip {\n \tstruct pwm_chip chip;\n \tspinlock_t lock;\n \tstruct atmel_tc *tc;\n \tstruct atmel_tcb_pwm_device *pwms[NPWM];\n+\tstruct atmel_tcb_channel bkup[NPWM / 2];\n };\n \n static inline struct atmel_tcb_pwm_chip *to_tcb_chip(struct pwm_chip *chip)\n@@ -175,12 +184,15 @@ static void atmel_tcb_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)\n \t * Use software trigger to apply the new setting.\n \t * If both PWM devices in this group are disabled we stop the clock.\n \t */\n-\tif (!(cmr & (ATMEL_TC_ACPC | ATMEL_TC_BCPC)))\n+\tif (!(cmr & (ATMEL_TC_ACPC | ATMEL_TC_BCPC))) {\n \t\t__raw_writel(ATMEL_TC_SWTRG | ATMEL_TC_CLKDIS,\n \t\t\t regs + ATMEL_TC_REG(group, CCR));\n-\telse\n+\t\ttcbpwmc->bkup[group].enabled = 1;\n+\t} else {\n \t\t__raw_writel(ATMEL_TC_SWTRG, regs +\n \t\t\t ATMEL_TC_REG(group, CCR));\n+\t\ttcbpwmc->bkup[group].enabled = 0;\n+\t}\n \n \tspin_unlock(&tcbpwmc->lock);\n }\n@@ -263,6 +275,7 @@ static int atmel_tcb_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)\n \t/* Use software trigger to apply the new setting */\n \t__raw_writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG,\n \t\t regs + ATMEL_TC_REG(group, CCR));\n+\ttcbpwmc->bkup[group].enabled = 1;\n \tspin_unlock(&tcbpwmc->lock);\n \treturn 0;\n }\n@@ -445,10 +458,56 @@ static const struct of_device_id atmel_tcb_pwm_dt_ids[] = {\n };\n MODULE_DEVICE_TABLE(of, atmel_tcb_pwm_dt_ids);\n \n+#ifdef CONFIG_PM_SLEEP\n+static int atmel_tcb_pwm_suspend(struct device *dev)\n+{\n+\tstruct platform_device *pdev = to_platform_device(dev);\n+\tstruct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);\n+\tvoid __iomem *base = tcbpwm->tc->regs;\n+\tint i;\n+\n+\tfor (i = 0; i < (NPWM / 2); i++) {\n+\t\tstruct atmel_tcb_channel *chan = &tcbpwm->bkup[i];\n+\n+\t\tchan->cmr = readl(base + ATMEL_TC_REG(i, CMR));\n+\t\tchan->ra = readl(base + ATMEL_TC_REG(i, RA));\n+\t\tchan->rb = readl(base + ATMEL_TC_REG(i, RB));\n+\t\tchan->rc = readl(base + ATMEL_TC_REG(i, RC));\n+\t}\n+\treturn 0;\n+}\n+\n+static int atmel_tcb_pwm_resume(struct device *dev)\n+{\n+\tstruct platform_device *pdev = to_platform_device(dev);\n+\tstruct atmel_tcb_pwm_chip *tcbpwm = platform_get_drvdata(pdev);\n+\tvoid __iomem *base = tcbpwm->tc->regs;\n+\tint i;\n+\n+\tfor (i = 0; i < (NPWM / 2); i++) {\n+\t\tstruct atmel_tcb_channel *chan = &tcbpwm->bkup[i];\n+\n+\t\twritel(chan->cmr, base + ATMEL_TC_REG(i, CMR));\n+\t\twritel(chan->ra, base + ATMEL_TC_REG(i, RA));\n+\t\twritel(chan->rb, base + ATMEL_TC_REG(i, RB));\n+\t\twritel(chan->rc, base + ATMEL_TC_REG(i, RC));\n+\t\tif (chan->enabled) {\n+\t\t\twritel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG,\n+\t\t\t\tbase + ATMEL_TC_REG(i, CCR));\n+\t\t}\n+\t}\n+\treturn 0;\n+}\n+#endif\n+\n+static SIMPLE_DEV_PM_OPS(atmel_tcb_pwm_pm_ops, atmel_tcb_pwm_suspend,\n+\t\t\t atmel_tcb_pwm_resume);\n+\n static struct platform_driver atmel_tcb_pwm_driver = {\n \t.driver = {\n \t\t.name = \"atmel-tcb-pwm\",\n \t\t.of_match_table = atmel_tcb_pwm_dt_ids,\n+\t\t.pm = &atmel_tcb_pwm_pm_ops,\n \t},\n \t.probe = atmel_tcb_pwm_probe,\n \t.remove = atmel_tcb_pwm_remove,\n", "prefixes": [ "v2", "7/9" ] }