From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965001AbaCSM3A (ORCPT ); Wed, 19 Mar 2014 08:29:00 -0400 Received: from mailout2.w1.samsung.com ([210.118.77.12]:12986 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964791AbaCSM26 (ORCPT ); Wed, 19 Mar 2014 08:28:58 -0400 X-AuditID: cbfec7f4-b7f796d000005a13-05-53298d8740b1 From: Krzysztof Kozlowski To: Sangbeom Kim , Samuel Ortiz , Lee Jones , Alessandro Zummo , linux-kernel@vger.kernel.org, rtc-linux@googlegroups.com Cc: Sachin Kamat , Kyungmin Park , Bartlomiej Zolnierkiewicz , Tomasz Figa , Krzysztof Kozlowski Subject: [PATCH-next] mfd/rtc: s5m: Do not allocate RTC I2C dummy and regmap for unsupported chipsets Date: Wed, 19 Mar 2014 13:28:15 +0100 Message-id: <1395232095-7103-1-git-send-email-k.kozlowski@samsung.com> X-Mailer: git-send-email 1.7.9.5 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrMJMWRmVeSWpSXmKPExsVy+t/xK7rtvZrBBkePC1gsuXiV3WLjjPWs Fq9fGFqcbXrDbnH/61FGi8u75rBZ7O/sYLQ4+aeX0eJ0N6vFxRVfmCzWz3jN4sDtsWfiSTaP O9f2sHnMOxno0bdlFaPH9Hk/mTw+b5ILYIvisklJzcksSy3St0vgyjh6eDtbwQ/3iqb7n5ka GFutuhg5OSQETCSOfH/DAmGLSVy4t56ti5GLQ0hgKaPEtTWTWCCcPiaJucfWMYFUsQkYS2xe vgSsSkTgKqPExCWL2UEcZoFHjBLnOj8xglQJC6RLdO7oAqri4GARUJU4+rkIxOQVcJOYd90O xJQQUJCYM8lmAiP3AkaGVYyiqaXJBcVJ6bmGesWJucWleel6yfm5mxghAfVlB+PiY1aHGAU4 GJV4eCVjNYKFWBPLiitzDzFKcDArifAeqtcMFuJNSaysSi3Kjy8qzUktPsTIxMEp1cBYI/12 beuJpWYbq+ecCdTl3Dq3QTZ58ROB1z+s79zh05O29y/K55U0L1nArMDres51n9aPQwrFC94K XDtufGlC1ez7J3TmPqu5NWW6VucXM92M0EdmRebGPg3O1TrtPsvTOlgKdassDVm9Zok9um2d Y5KT+/bbIgnu/JnFIiE7JeRk3q4TSlViKc5INNRiLipOBADv6cpBBgIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The rtc-s5m driver does not support all of S2M and S5M chipsets supported by main MFD sec-core driver. For such chipsets unsupported by rtc-s5m, the MFD sec-core driver initialized regmap with default config. This config in such cases wouldn't work at all. The main MFD sec-core driver shouldn't initialize regmap for child drivers which is not used by them and even not valid. Move the allocation of RTC I2C dummy device and initialization of RTC regmap from main MFD sec-core driver to the rtc-s5m driver. The rtc-s5m driver will use proper regmap config for supported devices. Signed-off-by: Krzysztof Kozlowski --- drivers/mfd/sec-core.c | 53 +-------------------------- drivers/rtc/rtc-s5m.c | 75 +++++++++++++++++++++++++++++++++++--- include/linux/mfd/samsung/core.h | 3 -- 3 files changed, 71 insertions(+), 60 deletions(-) diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c index 524ca909764e..be577c4855b7 100644 --- a/drivers/mfd/sec-core.c +++ b/drivers/mfd/sec-core.c @@ -25,7 +25,6 @@ #include #include #include -#include #include #include #include @@ -193,20 +192,6 @@ static const struct regmap_config s5m8767_regmap_config = { .cache_type = REGCACHE_FLAT, }; -static const struct regmap_config s5m_rtc_regmap_config = { - .reg_bits = 8, - .val_bits = 8, - - .max_register = SEC_RTC_REG_MAX, -}; - -static const struct regmap_config s2mps14_rtc_regmap_config = { - .reg_bits = 8, - .val_bits = 8, - - .max_register = S2MPS_RTC_REG_MAX, -}; - #ifdef CONFIG_OF /* * Only the common platform data elements for s5m8767 are parsed here from the @@ -261,7 +246,7 @@ static int sec_pmic_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev); - const struct regmap_config *regmap, *regmap_rtc; + const struct regmap_config *regmap; struct sec_pmic_dev *sec_pmic; int ret; @@ -295,39 +280,21 @@ static int sec_pmic_probe(struct i2c_client *i2c, switch (sec_pmic->device_type) { case S2MPA01: regmap = &s2mpa01_regmap_config; - /* - * The rtc-s5m driver does not support S2MPA01 and there - * is no mfd_cell for S2MPA01 RTC device. - * However we must pass something to devm_regmap_init_i2c() - * so use S5M-like regmap config even though it wouldn't work. - */ - regmap_rtc = &s5m_rtc_regmap_config; break; case S2MPS11X: regmap = &s2mps11_regmap_config; - /* - * The rtc-s5m driver does not support S2MPS11 and there - * is no mfd_cell for S2MPS11 RTC device. - * However we must pass something to devm_regmap_init_i2c() - * so use S5M-like regmap config even though it wouldn't work. - */ - regmap_rtc = &s5m_rtc_regmap_config; break; case S2MPS14X: regmap = &s2mps14_regmap_config; - regmap_rtc = &s2mps14_rtc_regmap_config; break; case S5M8763X: regmap = &s5m8763_regmap_config; - regmap_rtc = &s5m_rtc_regmap_config; break; case S5M8767X: regmap = &s5m8767_regmap_config; - regmap_rtc = &s5m_rtc_regmap_config; break; default: regmap = &sec_regmap_config; - regmap_rtc = &s5m_rtc_regmap_config; break; } @@ -339,21 +306,6 @@ static int sec_pmic_probe(struct i2c_client *i2c, return ret; } - sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); - if (!sec_pmic->rtc) { - dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n"); - return -ENODEV; - } - i2c_set_clientdata(sec_pmic->rtc, sec_pmic); - - sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc); - if (IS_ERR(sec_pmic->regmap_rtc)) { - ret = PTR_ERR(sec_pmic->regmap_rtc); - dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n", - ret); - goto err_regmap_rtc; - } - if (pdata && pdata->cfg_pmic_irq) pdata->cfg_pmic_irq(); @@ -400,8 +352,6 @@ static int sec_pmic_probe(struct i2c_client *i2c, err_mfd: sec_irq_exit(sec_pmic); -err_regmap_rtc: - i2c_unregister_device(sec_pmic->rtc); return ret; } @@ -411,7 +361,6 @@ static int sec_pmic_remove(struct i2c_client *i2c) mfd_remove_devices(sec_pmic->dev); sec_irq_exit(sec_pmic); - i2c_unregister_device(sec_pmic->rtc); return 0; } diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c index 476af93543f6..8ec2d6a1dbe1 100644 --- a/drivers/rtc/rtc-s5m.c +++ b/drivers/rtc/rtc-s5m.c @@ -40,6 +40,7 @@ struct s5m_rtc_info { struct device *dev; + struct i2c_client *i2c; struct sec_pmic_dev *s5m87xx; struct regmap *regmap; struct rtc_device *rtc_dev; @@ -49,6 +50,20 @@ struct s5m_rtc_info { bool wtsr_smpl; }; +static const struct regmap_config s5m_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = SEC_RTC_REG_MAX, +}; + +static const struct regmap_config s2mps14_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPS_RTC_REG_MAX, +}; + static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm, int rtc_24hr_mode) { @@ -554,6 +569,7 @@ static int s5m_rtc_probe(struct platform_device *pdev) struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent); struct sec_platform_data *pdata = s5m87xx->pdata; struct s5m_rtc_info *info; + const struct regmap_config *regmap_cfg; int ret; if (!pdata) { @@ -565,9 +581,37 @@ static int s5m_rtc_probe(struct platform_device *pdev) if (!info) return -ENOMEM; + switch (pdata->device_type) { + case S2MPS14X: + regmap_cfg = &s2mps14_rtc_regmap_config; + break; + case S5M8763X: + regmap_cfg = &s5m_rtc_regmap_config; + break; + case S5M8767X: + regmap_cfg = &s5m_rtc_regmap_config; + break; + default: + dev_err(&pdev->dev, "Device type is not supported by RTC driver\n"); + return -ENODEV; + } + + info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR); + if (!info->i2c) { + dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n"); + return -ENODEV; + } + + info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg); + if (IS_ERR(info->regmap)) { + ret = PTR_ERR(info->regmap); + dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n", + ret); + goto err; + } + info->dev = &pdev->dev; info->s5m87xx = s5m87xx; - info->regmap = s5m87xx->regmap_rtc; info->device_type = s5m87xx->device_type; info->wtsr_smpl = s5m87xx->wtsr_smpl; @@ -585,7 +629,7 @@ static int s5m_rtc_probe(struct platform_device *pdev) default: ret = -EINVAL; dev_err(&pdev->dev, "Unsupported device type: %d\n", ret); - return ret; + goto err; } platform_set_drvdata(pdev, info); @@ -602,15 +646,24 @@ static int s5m_rtc_probe(struct platform_device *pdev) info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc", &s5m_rtc_ops, THIS_MODULE); - if (IS_ERR(info->rtc_dev)) - return PTR_ERR(info->rtc_dev); + if (IS_ERR(info->rtc_dev)) { + ret = PTR_ERR(info->rtc_dev); + goto err; + } ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, s5m_rtc_alarm_irq, 0, "rtc-alarm0", info); - if (ret < 0) + if (ret < 0) { dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", info->irq, ret); + goto err; + } + + return 0; + +err: + i2c_unregister_device(info->i2c); return ret; } @@ -639,6 +692,17 @@ static void s5m_rtc_shutdown(struct platform_device *pdev) s5m_rtc_enable_smpl(info, false); } +static int s5m_rtc_remove(struct platform_device *pdev) +{ + struct s5m_rtc_info *info = platform_get_drvdata(pdev); + + /* Perform also all shutdown steps when removing */ + s5m_rtc_shutdown(pdev); + i2c_unregister_device(info->i2c); + + return 0; +} + #ifdef CONFIG_PM_SLEEP static int s5m_rtc_resume(struct device *dev) { @@ -676,6 +740,7 @@ static struct platform_driver s5m_rtc_driver = { .pm = &s5m_rtc_pm_ops, }, .probe = s5m_rtc_probe, + .remove = s5m_rtc_remove, .shutdown = s5m_rtc_shutdown, .id_table = s5m_rtc_id, }; diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h index 900bc9e1888b..3cd76cd596e4 100644 --- a/include/linux/mfd/samsung/core.h +++ b/include/linux/mfd/samsung/core.h @@ -28,7 +28,6 @@ enum sec_device_type { * @dev: master device of the chip (can be used to access platform data) * @pdata: pointer to private data used to pass platform data to child * @i2c: i2c client private data for regulator - * @rtc: i2c client private data for rtc * @iolock: mutex for serializing io access * @irqlock: mutex for buslock * @irq_base: base IRQ number for sec-pmic, required for IRQs @@ -42,9 +41,7 @@ struct sec_pmic_dev { struct device *dev; struct sec_platform_data *pdata; struct regmap *regmap_pmic; - struct regmap *regmap_rtc; struct i2c_client *i2c; - struct i2c_client *rtc; int device_type; int irq_base; -- 1.7.9.5