From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on sa.local.altlinux.org X-Spam-Level: X-Spam-Status: No, score=-4.3 required=5.0 tests=ALL_TRUSTED,BAYES_00, RP_MATCHES_RCVD autolearn=unavailable autolearn_force=no version=3.4.1 From: Daniil Gnusarev To: devel-kernel@lists.altlinux.org Date: Mon, 14 Oct 2024 18:01:55 +0400 Message-ID: <20241014140221.535985-15-gnusarevda@basealt.ru> X-Mailer: git-send-email 2.42.2 In-Reply-To: <20241014140221.535985-1-gnusarevda@basealt.ru> References: <20241014140221.535985-1-gnusarevda@basealt.ru> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [d-kernel] [PATCH 14/39] hwmon: bt1-pvt: adjusted probing for Baikal-M SoC X-BeenThere: devel-kernel@lists.altlinux.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: ALT Linux kernel packages development List-Id: ALT Linux kernel packages development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Oct 2024 14:02:03 -0000 Archived-At: List-Archive: List-Post: From: Alexey Sheplyakov PVT registers and clocks are managed by the firmware (ARM-TF) and can't be accessed by Linux directly. Therefore skip enabling (disabling) clocks and ioremapping registers on Baikal-M. Also a sensor is identified by special `pvt_id' instead of registers base address. pvt_id is initialized from the device tree. Signed-off-by: Alexey Sheplyakov X-feature-Baikal-M --- drivers/hwmon/Kconfig | 5 +++-- drivers/hwmon/bt1-pvt.c | 32 ++++++++++++++++++++++++++------ 2 files changed, 29 insertions(+), 8 deletions(-) diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index ec38c88921589..af5d424357037 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -428,10 +428,11 @@ config SENSORS_ATXP1 config SENSORS_BT1_PVT tristate "Baikal-T1 Process, Voltage, Temperature sensor driver" - depends on MIPS_BAIKAL_T1 || COMPILE_TEST + depends on MIPS_BAIKAL_T1 || ARCH_BAIKAL || COMPILE_TEST + default m if MIPS_BAIKAL_T1 || ARCH_BAIKAL select POLYNOMIAL help - If you say yes here you get support for Baikal-T1 PVT sensor + If you say yes here you get support for Baikal-M or Baikal-T1 PVT sensor embedded into the SoC. This driver can also be built as a module. If so, the module will be diff --git a/drivers/hwmon/bt1-pvt.c b/drivers/hwmon/bt1-pvt.c index 87873548ef7da..5fc3babb57a90 100644 --- a/drivers/hwmon/bt1-pvt.c +++ b/drivers/hwmon/bt1-pvt.c @@ -925,29 +925,39 @@ static struct pvt_hwmon *pvt_create_data(struct platform_device *pdev) static int pvt_request_regs(struct pvt_hwmon *pvt) { + int err = 0; +#ifdef BT1_PVT_DIRECT_REG_ACCESS struct platform_device *pdev = to_platform_device(pvt->dev); - pvt->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(pvt->regs)) return PTR_ERR(pvt->regs); +#else + err = of_property_read_u32(pvt->dev->of_node, "pvt_id", &(pvt->pvt_id)); + if (err) { + dev_err(pvt->dev, "couldn't find pvt_id\n"); + } +#endif - return 0; + return err; } +#ifdef BT1_PVT_DIRECT_REG_ACCESS static void pvt_disable_clks(void *data) { struct pvt_hwmon *pvt = data; clk_bulk_disable_unprepare(PVT_CLOCK_NUM, pvt->clks); } +#endif static int pvt_request_clks(struct pvt_hwmon *pvt) { - int ret; + int ret = 0; pvt->clks[PVT_CLOCK_APB].id = "pclk"; pvt->clks[PVT_CLOCK_REF].id = "ref"; +#ifdef BT1_PVT_DIRECT_REG_ACCESS ret = devm_clk_bulk_get(pvt->dev, PVT_CLOCK_NUM, pvt->clks); if (ret) { dev_err(pvt->dev, "Couldn't get PVT clocks descriptors\n"); @@ -965,8 +975,11 @@ static int pvt_request_clks(struct pvt_hwmon *pvt) dev_err(pvt->dev, "Can't add PVT clocks disable action\n"); return ret; } - - return 0; +#else + pvt->clks[PVT_CLOCK_APB].clk = NULL; + pvt->clks[PVT_CLOCK_REF].clk = NULL; +#endif + return ret; } static int pvt_check_pwr(struct pvt_hwmon *pvt) @@ -1006,14 +1019,17 @@ static int pvt_check_pwr(struct pvt_hwmon *pvt) static int pvt_init_iface(struct pvt_hwmon *pvt) { - unsigned long rate; u32 trim, temp; +#ifdef BT1_PVT_DIRECT_REG_ACCESS + unsigned long rate; + rate = clk_get_rate(pvt->clks[PVT_CLOCK_REF].clk); if (!rate) { dev_err(pvt->dev, "Invalid reference clock rate\n"); return -ENODEV; } +#endif /* * Make sure all interrupts and controller are disabled so not to @@ -1042,6 +1058,7 @@ static int pvt_init_iface(struct pvt_hwmon *pvt) * polled. In that case the formulae will look a bit different: * Ttotal = 5 * (N / Fclk + Tmin) */ +#if defined(BT1_PVT_DIRECT_REG_ACCESS) #if defined(CONFIG_SENSORS_BT1_PVT_ALARMS) pvt->timeout = ktime_set(PVT_SENSORS_NUM * PVT_TOUT_DEF, 0); pvt->timeout = ktime_divns(pvt->timeout, rate); @@ -1051,6 +1068,9 @@ static int pvt_init_iface(struct pvt_hwmon *pvt) pvt->timeout = ktime_divns(pvt->timeout, rate); pvt->timeout = ktime_add_ns(pvt->timeout, PVT_TOUT_MIN); #endif +#else + pvt->timeout = ktime_set(0, PVT_TOUT_MIN * PVT_SENSORS_NUM); +#endif trim = PVT_TRIM_DEF; if (!of_property_read_u32(pvt->dev->of_node, -- 2.42.2