Subject: + mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets.patch added to -mm tree To: k.kozlowski@xxxxxxxxxxx,a.zummo@xxxxxxxxxxxx,b.zolnierkie@xxxxxxxxxxx,kyungmin.park@xxxxxxxxxxx,lee.jones@xxxxxxxxxx,m.szyprowski@xxxxxxxxxxx,sameo@xxxxxxxxxxxxxxx,sbkim73@xxxxxxxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Mon, 21 Apr 2014 15:21:30 -0700 The patch titled Subject: mfd/rtc: s5m: do not allocate RTC I2C dummy and regmap for unsupported chipsets has been added to the -mm tree. Its filename is mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> Subject: mfd/rtc: s5m: do not allocate RTC I2C dummy and regmap for unsupported chipsets 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 <k.kozlowski@xxxxxxxxxxx> Acked-by: Lee Jones <lee.jones@xxxxxxxxxx> Acked-by: Alessandro Zummo <a.zummo@xxxxxxxxxxxx> Cc: Sangbeom Kim <sbkim73@xxxxxxxxxxx> Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx> Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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 -puN drivers/mfd/sec-core.c~mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets drivers/mfd/sec-core.c --- a/drivers/mfd/sec-core.c~mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets +++ a/drivers/mfd/sec-core.c @@ -25,7 +25,6 @@ #include <linux/mfd/core.h> #include <linux/mfd/samsung/core.h> #include <linux/mfd/samsung/irq.h> -#include <linux/mfd/samsung/rtc.h> #include <linux/mfd/samsung/s2mpa01.h> #include <linux/mfd/samsung/s2mps11.h> #include <linux/mfd/samsung/s2mps14.h> @@ -196,20 +195,6 @@ static const struct regmap_config s5m876 .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 @@ -264,7 +249,7 @@ static int sec_pmic_probe(struct i2c_cli 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; @@ -298,39 +283,21 @@ static int sec_pmic_probe(struct i2c_cli 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; } @@ -342,21 +309,6 @@ static int sec_pmic_probe(struct i2c_cli 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(); @@ -403,8 +355,6 @@ static int sec_pmic_probe(struct i2c_cli err_mfd: sec_irq_exit(sec_pmic); -err_regmap_rtc: - i2c_unregister_device(sec_pmic->rtc); return ret; } @@ -414,7 +364,6 @@ static int sec_pmic_remove(struct i2c_cl mfd_remove_devices(sec_pmic->dev); sec_irq_exit(sec_pmic); - i2c_unregister_device(sec_pmic->rtc); return 0; } diff -puN drivers/rtc/rtc-s5m.c~mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets drivers/rtc/rtc-s5m.c --- a/drivers/rtc/rtc-s5m.c~mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets +++ a/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 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 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 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 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 plat 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_dr .pm = &s5m_rtc_pm_ops, }, .probe = s5m_rtc_probe, + .remove = s5m_rtc_remove, .shutdown = s5m_rtc_shutdown, .id_table = s5m_rtc_id, }; diff -puN include/linux/mfd/samsung/core.h~mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets include/linux/mfd/samsung/core.h --- a/include/linux/mfd/samsung/core.h~mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets +++ a/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; _ Patches currently in -mm which might be from k.kozlowski@xxxxxxxxxxx are linux-next.patch mfd-rtc-s5m-do-not-allocate-rtc-i2c-dummy-and-regmap-for-unsupported-chipsets.patch mfd-rtc-sec-s5m-rename-sec-symbols-to-s5m.patch rtc-s5m-remove-undocumented-time-init-on-first-boot.patch rtc-s5m-use-shorter-time-of-register-update.patch rtc-s5m-support-different-register-layout.patch rtc-s5m-add-support-for-s2mps14-rtc.patch rtc-s5m-consolidate-two-device-type-switch-statements.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html