From 5006fe546a4eb0393782b818d4e0e2a6b4fa3803 Mon Sep 17 00:00:00 2001 From: Marc Reilly Date: Tue, 1 May 2012 12:26:46 +0200 Subject: mfd: Prepare for separating spi and i2c mc13xxx-core backends This patch abstracts the bus specific operations from the driver core. Generic init and cleanup is consolidated into mc13xxx_common_*. spi specific functions are renamed to reflect such. (The irq member of the mc13xxx struct is no longer redundant, it's used to store the irq for cleanup time). Signed-off-by: Marc Reilly Signed-off-by: Samuel Ortiz --- drivers/mfd/mc13xxx-core.c | 188 +++++++++++++++++++++++++++------------------ 1 file changed, 113 insertions(+), 75 deletions(-) (limited to 'drivers/mfd/mc13xxx-core.c') diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c index 9fd4f63c45cc..c8b7a28b2669 100644 --- a/drivers/mfd/mc13xxx-core.c +++ b/drivers/mfd/mc13xxx-core.c @@ -22,8 +22,18 @@ #include #include +enum mc13xxx_id { + MC13XXX_ID_MC13783, + MC13XXX_ID_MC13892, + MC13XXX_ID_INVALID, +}; + struct mc13xxx { struct spi_device *spidev; + + struct device *dev; + enum mc13xxx_id ictype; + struct mutex lock; int irq; int flags; @@ -144,36 +154,32 @@ struct mc13xxx { void mc13xxx_lock(struct mc13xxx *mc13xxx) { if (!mutex_trylock(&mc13xxx->lock)) { - dev_dbg(&mc13xxx->spidev->dev, "wait for %s from %pf\n", + dev_dbg(mc13xxx->dev, "wait for %s from %pf\n", __func__, __builtin_return_address(0)); mutex_lock(&mc13xxx->lock); } - dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n", + dev_dbg(mc13xxx->dev, "%s from %pf\n", __func__, __builtin_return_address(0)); } EXPORT_SYMBOL(mc13xxx_lock); void mc13xxx_unlock(struct mc13xxx *mc13xxx) { - dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n", + dev_dbg(mc13xxx->dev, "%s from %pf\n", __func__, __builtin_return_address(0)); mutex_unlock(&mc13xxx->lock); } EXPORT_SYMBOL(mc13xxx_unlock); #define MC13XXX_REGOFFSET_SHIFT 25 -int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) +static int mc13xxx_spi_reg_read(struct mc13xxx *mc13xxx, + unsigned int offset, u32 *val) { struct spi_transfer t; struct spi_message m; int ret; - BUG_ON(!mutex_is_locked(&mc13xxx->lock)); - - if (offset > MC13XXX_NUMREGS) - return -EINVAL; - *val = offset << MC13XXX_REGOFFSET_SHIFT; memset(&t, 0, sizeof(t)); @@ -195,26 +201,17 @@ int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) *val &= 0xffffff; - dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val); - return 0; } -EXPORT_SYMBOL(mc13xxx_reg_read); -int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) +static int mc13xxx_spi_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, + u32 val) { u32 buf; struct spi_transfer t; struct spi_message m; int ret; - BUG_ON(!mutex_is_locked(&mc13xxx->lock)); - - dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val); - - if (offset > MC13XXX_NUMREGS || val > 0xffffff) - return -EINVAL; - buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val; memset(&t, 0, sizeof(t)); @@ -235,6 +232,34 @@ int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) return 0; } + +int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) +{ + int ret; + + BUG_ON(!mutex_is_locked(&mc13xxx->lock)); + + if (offset > MC13XXX_NUMREGS) + return -EINVAL; + + ret = mc13xxx_spi_reg_read(mc13xxx, offset, val); + dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val); + + return ret; +} +EXPORT_SYMBOL(mc13xxx_reg_read); + +int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) +{ + BUG_ON(!mutex_is_locked(&mc13xxx->lock)); + + dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val); + + if (offset > MC13XXX_NUMREGS || val > 0xffffff) + return -EINVAL; + + return mc13xxx_spi_reg_write(mc13xxx, offset, val); +} EXPORT_SYMBOL(mc13xxx_reg_write); int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset, @@ -439,7 +464,7 @@ static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx, if (handled == IRQ_HANDLED) num_handled++; } else { - dev_err(&mc13xxx->spidev->dev, + dev_err(mc13xxx->dev, "BUG: irq %u but no handler\n", baseirq + irq); @@ -475,25 +500,23 @@ static irqreturn_t mc13xxx_irq_thread(int irq, void *data) return IRQ_RETVAL(handled); } -enum mc13xxx_id { - MC13XXX_ID_MC13783, - MC13XXX_ID_MC13892, - MC13XXX_ID_INVALID, -}; - static const char *mc13xxx_chipname[] = { [MC13XXX_ID_MC13783] = "mc13783", [MC13XXX_ID_MC13892] = "mc13892", }; #define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask)) -static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id) +static int mc13xxx_identify(struct mc13xxx *mc13xxx) { u32 icid; u32 revision; - const char *name; int ret; + /* + * Get the generation ID from register 46, as apparently some older + * IC revisions only have this info at this location. Newer ICs seem to + * have both. + */ ret = mc13xxx_reg_read(mc13xxx, 46, &icid); if (ret) return ret; @@ -502,26 +525,23 @@ static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id) switch (icid) { case 2: - *id = MC13XXX_ID_MC13783; - name = "mc13783"; + mc13xxx->ictype = MC13XXX_ID_MC13783; break; case 7: - *id = MC13XXX_ID_MC13892; - name = "mc13892"; + mc13xxx->ictype = MC13XXX_ID_MC13892; break; default: - *id = MC13XXX_ID_INVALID; + mc13xxx->ictype = MC13XXX_ID_INVALID; break; } - if (*id == MC13XXX_ID_MC13783 || *id == MC13XXX_ID_MC13892) { + if (mc13xxx->ictype == MC13XXX_ID_MC13783 || + mc13xxx->ictype == MC13XXX_ID_MC13892) { ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision); - if (ret) - return ret; - dev_info(&mc13xxx->spidev->dev, "%s: rev: %d.%d, " + dev_info(mc13xxx->dev, "%s: rev: %d.%d, " "fin: %d, fab: %d, icid: %d/%d\n", - mc13xxx_chipname[*id], + mc13xxx_chipname[mc13xxx->ictype], maskval(revision, MC13XXX_REVISION_REVFULL), maskval(revision, MC13XXX_REVISION_REVMETAL), maskval(revision, MC13XXX_REVISION_FIN), @@ -530,26 +550,12 @@ static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id) maskval(revision, MC13XXX_REVISION_ICIDCODE)); } - if (*id != MC13XXX_ID_INVALID) { - const struct spi_device_id *devid = - spi_get_device_id(mc13xxx->spidev); - if (!devid || devid->driver_data != *id) - dev_warn(&mc13xxx->spidev->dev, "device id doesn't " - "match auto detection!\n"); - } - - return 0; + return (mc13xxx->ictype == MC13XXX_ID_INVALID) ? -ENODEV : 0; } static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx) { - const struct spi_device_id *devid = - spi_get_device_id(mc13xxx->spidev); - - if (!devid) - return NULL; - - return mc13xxx_chipname[devid->driver_data]; + return mc13xxx_chipname[mc13xxx->ictype]; } int mc13xxx_get_flags(struct mc13xxx *mc13xxx) @@ -592,7 +598,7 @@ int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode, }; init_completion(&adcdone_data.done); - dev_dbg(&mc13xxx->spidev->dev, "%s\n", __func__); + dev_dbg(mc13xxx->dev, "%s\n", __func__); mc13xxx_lock(mc13xxx); @@ -637,7 +643,8 @@ int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode, adc1 |= ato << MC13783_ADC1_ATO_SHIFT; if (atox) adc1 |= MC13783_ADC1_ATOX; - dev_dbg(&mc13xxx->spidev->dev, "%s: request irq\n", __func__); + + dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__); mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE, mc13xxx_handler_adcdone, __func__, &adcdone_data); mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE); @@ -695,7 +702,7 @@ static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx, if (!cell.name) return -ENOMEM; - return mfd_add_devices(&mc13xxx->spidev->dev, -1, &cell, 1, NULL, 0); + return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0); } static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format) @@ -706,7 +713,7 @@ static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format) #ifdef CONFIG_OF static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) { - struct device_node *np = mc13xxx->spidev->dev.of_node; + struct device_node *np = mc13xxx->dev.of_node; if (!np) return -ENODEV; @@ -752,13 +759,17 @@ static const struct of_device_id mc13xxx_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); -static int mc13xxx_probe(struct spi_device *spi) +static int mc13xxx_common_init(struct mc13xxx *mc13xxx, + struct mc13xxx_platform_data *pdata, int irq); + +static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx); + +static int mc13xxx_spi_probe(struct spi_device *spi) { const struct of_device_id *of_id; struct spi_driver *sdrv = to_spi_driver(spi->dev.driver); struct mc13xxx *mc13xxx; struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev); - enum mc13xxx_id id; int ret; of_id = of_match_device(mc13xxx_dt_ids, &spi->dev); @@ -774,13 +785,34 @@ static int mc13xxx_probe(struct spi_device *spi) spi->bits_per_word = 32; spi_setup(spi); + mc13xxx->dev = &spi->dev; mc13xxx->spidev = spi; + ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq); + + if (ret) { + dev_set_drvdata(&spi->dev, NULL); + } else { + const struct spi_device_id *devid = + spi_get_device_id(mc13xxx->spidev); + if (!devid || devid->driver_data != mc13xxx->ictype) + dev_warn(mc13xxx->dev, + "device id doesn't match auto detection!\n"); + } + + return ret; +} + +static int mc13xxx_common_init(struct mc13xxx *mc13xxx, + struct mc13xxx_platform_data *pdata, int irq) +{ + int ret; + mutex_init(&mc13xxx->lock); mc13xxx_lock(mc13xxx); - ret = mc13xxx_identify(mc13xxx, &id); - if (ret || id == MC13XXX_ID_INVALID) + ret = mc13xxx_identify(mc13xxx); + if (ret) goto err_revision; /* mask all irqs */ @@ -792,18 +824,19 @@ static int mc13xxx_probe(struct spi_device *spi) if (ret) goto err_mask; - ret = request_threaded_irq(spi->irq, NULL, mc13xxx_irq_thread, + ret = request_threaded_irq(irq, NULL, mc13xxx_irq_thread, IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx); if (ret) { err_mask: err_revision: mc13xxx_unlock(mc13xxx); - dev_set_drvdata(&spi->dev, NULL); kfree(mc13xxx); return ret; } + mc13xxx->irq = irq; + mc13xxx_unlock(mc13xxx); if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata) @@ -838,39 +871,44 @@ err_revision: return 0; } -static int __devexit mc13xxx_remove(struct spi_device *spi) +static int __devexit mc13xxx_spi_remove(struct spi_device *spi) { struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev); - free_irq(mc13xxx->spidev->irq, mc13xxx); + mc13xxx_common_cleanup(mc13xxx); - mfd_remove_devices(&spi->dev); + return 0; +} - kfree(mc13xxx); +static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx) +{ + free_irq(mc13xxx->irq, mc13xxx); - return 0; + mfd_remove_devices(mc13xxx->dev); + + kfree(mc13xxx); } -static struct spi_driver mc13xxx_driver = { +static struct spi_driver mc13xxx_spi_driver = { .id_table = mc13xxx_device_id, .driver = { .name = "mc13xxx", .owner = THIS_MODULE, .of_match_table = mc13xxx_dt_ids, }, - .probe = mc13xxx_probe, - .remove = __devexit_p(mc13xxx_remove), + .probe = mc13xxx_spi_probe, + .remove = __devexit_p(mc13xxx_spi_remove), }; static int __init mc13xxx_init(void) { - return spi_register_driver(&mc13xxx_driver); + return spi_register_driver(&mc13xxx_spi_driver); } subsys_initcall(mc13xxx_init); static void __exit mc13xxx_exit(void) { - spi_unregister_driver(&mc13xxx_driver); + spi_unregister_driver(&mc13xxx_spi_driver); } module_exit(mc13xxx_exit); -- cgit v1.2.3-58-ga151 From 91b5e741184ea9836cd7d7509e4f9b6eefa27df2 Mon Sep 17 00:00:00 2001 From: Marc Reilly Date: Sun, 1 Apr 2012 16:41:37 +1000 Subject: mfd: Use regmap for the mc13xxx-core register access This change converts the mc13xxx core to use regmap rather than direct spi r/w. The spidev member of mc13xxx struct becomes redundant and is removed. Extra debugging aids are added to mc13xxx_reg_rmw. Mutex init is moved to before regmap init. Signed-off-by: Marc Reilly Reviewed-by: Mark Brown Signed-off-by: Samuel Ortiz --- drivers/mfd/Kconfig | 1 + drivers/mfd/mc13xxx-core.c | 113 ++++++++++++++------------------------------- 2 files changed, 35 insertions(+), 79 deletions(-) (limited to 'drivers/mfd/mc13xxx-core.c') diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index c6edba69678a..411a61a99404 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -600,6 +600,7 @@ config MFD_MC13XXX depends on SPI_MASTER select MFD_CORE select MFD_MC13783 + select REGMAP_SPI help Support for the Freescale (Atlas) PMIC and audio CODECs MC13783 and MC13892. diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c index c8b7a28b2669..d761a2e54b98 100644 --- a/drivers/mfd/mc13xxx-core.c +++ b/drivers/mfd/mc13xxx-core.c @@ -21,6 +21,8 @@ #include #include #include +#include +#include enum mc13xxx_id { MC13XXX_ID_MC13783, @@ -29,7 +31,7 @@ enum mc13xxx_id { }; struct mc13xxx { - struct spi_device *spidev; + struct regmap *regmap; struct device *dev; enum mc13xxx_id ictype; @@ -172,67 +174,6 @@ void mc13xxx_unlock(struct mc13xxx *mc13xxx) } EXPORT_SYMBOL(mc13xxx_unlock); -#define MC13XXX_REGOFFSET_SHIFT 25 -static int mc13xxx_spi_reg_read(struct mc13xxx *mc13xxx, - unsigned int offset, u32 *val) -{ - struct spi_transfer t; - struct spi_message m; - int ret; - - *val = offset << MC13XXX_REGOFFSET_SHIFT; - - memset(&t, 0, sizeof(t)); - - t.tx_buf = val; - t.rx_buf = val; - t.len = sizeof(u32); - - spi_message_init(&m); - spi_message_add_tail(&t, &m); - - ret = spi_sync(mc13xxx->spidev, &m); - - /* error in message.status implies error return from spi_sync */ - BUG_ON(!ret && m.status); - - if (ret) - return ret; - - *val &= 0xffffff; - - return 0; -} - -static int mc13xxx_spi_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, - u32 val) -{ - u32 buf; - struct spi_transfer t; - struct spi_message m; - int ret; - - buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val; - - memset(&t, 0, sizeof(t)); - - t.tx_buf = &buf; - t.rx_buf = &buf; - t.len = sizeof(u32); - - spi_message_init(&m); - spi_message_add_tail(&t, &m); - - ret = spi_sync(mc13xxx->spidev, &m); - - BUG_ON(!ret && m.status); - - if (ret) - return ret; - - return 0; -} - int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) { int ret; @@ -242,7 +183,7 @@ int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val) if (offset > MC13XXX_NUMREGS) return -EINVAL; - ret = mc13xxx_spi_reg_read(mc13xxx, offset, val); + ret = regmap_read(mc13xxx->regmap, offset, val); dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val); return ret; @@ -258,25 +199,19 @@ int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val) if (offset > MC13XXX_NUMREGS || val > 0xffffff) return -EINVAL; - return mc13xxx_spi_reg_write(mc13xxx, offset, val); + return regmap_write(mc13xxx->regmap, offset, val); } EXPORT_SYMBOL(mc13xxx_reg_write); int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset, u32 mask, u32 val) { - int ret; - u32 valread; - + BUG_ON(!mutex_is_locked(&mc13xxx->lock)); BUG_ON(val & ~mask); + dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n", + offset, val, mask); - ret = mc13xxx_reg_read(mc13xxx, offset, &valread); - if (ret) - return ret; - - valread = (valread & ~mask) | val; - - return mc13xxx_reg_write(mc13xxx, offset, valread); + return regmap_update_bits(mc13xxx->regmap, offset, mask, val); } EXPORT_SYMBOL(mc13xxx_reg_rmw); @@ -713,7 +648,7 @@ static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format) #ifdef CONFIG_OF static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) { - struct device_node *np = mc13xxx->dev.of_node; + struct device_node *np = mc13xxx->dev->of_node; if (!np) return -ENODEV; @@ -759,6 +694,16 @@ static const struct of_device_id mc13xxx_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); +static struct regmap_config mc13xxx_regmap_spi_config = { + .reg_bits = 7, + .pad_bits = 1, + .val_bits = 24, + + .max_register = MC13XXX_NUMREGS, + + .cache_type = REGCACHE_NONE, +}; + static int mc13xxx_common_init(struct mc13xxx *mc13xxx, struct mc13xxx_platform_data *pdata, int irq); @@ -783,10 +728,19 @@ static int mc13xxx_spi_probe(struct spi_device *spi) dev_set_drvdata(&spi->dev, mc13xxx); spi->mode = SPI_MODE_0 | SPI_CS_HIGH; spi->bits_per_word = 32; - spi_setup(spi); mc13xxx->dev = &spi->dev; - mc13xxx->spidev = spi; + mutex_init(&mc13xxx->lock); + + mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config); + if (IS_ERR(mc13xxx->regmap)) { + ret = PTR_ERR(mc13xxx->regmap); + dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n", + ret); + dev_set_drvdata(&spi->dev, NULL); + kfree(mc13xxx); + return ret; + } ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq); @@ -794,7 +748,7 @@ static int mc13xxx_spi_probe(struct spi_device *spi) dev_set_drvdata(&spi->dev, NULL); } else { const struct spi_device_id *devid = - spi_get_device_id(mc13xxx->spidev); + spi_get_device_id(spi); if (!devid || devid->driver_data != mc13xxx->ictype) dev_warn(mc13xxx->dev, "device id doesn't match auto detection!\n"); @@ -808,7 +762,6 @@ static int mc13xxx_common_init(struct mc13xxx *mc13xxx, { int ret; - mutex_init(&mc13xxx->lock); mc13xxx_lock(mc13xxx); ret = mc13xxx_identify(mc13xxx); @@ -886,6 +839,8 @@ static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx) mfd_remove_devices(mc13xxx->dev); + regmap_exit(mc13xxx->regmap); + kfree(mc13xxx); } -- cgit v1.2.3-58-ga151 From a0c7c1d48ea9f53c67c79eda498bb8eda1422748 Mon Sep 17 00:00:00 2001 From: Marc Reilly Date: Sun, 1 Apr 2012 16:41:38 +1000 Subject: mfd: Move the mc13xxx-core spi specific code into a separate module All spi specific code is moved into a new module. The mc13xxx struct moves to a new local include file by necessity. A new config choice selects the SPI bus type support and by default is value of SPI_MASTER to remain compatible with existing configs. Signed-off-by: Marc Reilly Signed-off-by: Samuel Ortiz --- drivers/mfd/Kconfig | 17 ++++-- drivers/mfd/Makefile | 1 + drivers/mfd/mc13xxx-core.c | 148 ++------------------------------------------- drivers/mfd/mc13xxx-spi.c | 140 ++++++++++++++++++++++++++++++++++++++++++ drivers/mfd/mc13xxx.h | 45 ++++++++++++++ 5 files changed, 204 insertions(+), 147 deletions(-) create mode 100644 drivers/mfd/mc13xxx-spi.c create mode 100644 drivers/mfd/mc13xxx.h (limited to 'drivers/mfd/mc13xxx-core.c') diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 411a61a99404..9c8294c26efb 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -600,14 +600,23 @@ config MFD_MC13XXX depends on SPI_MASTER select MFD_CORE select MFD_MC13783 - select REGMAP_SPI help - Support for the Freescale (Atlas) PMIC and audio CODECs - MC13783 and MC13892. - This driver provides common support for accessing the device, + Enable support for the Freescale MC13783 and MC13892 PMICs. + This driver provides common support for accessing the device, additional drivers must be enabled in order to use the functionality of the device. +if MFD_MC13XXX + +config MFD_MC13XXX_SPI + tristate "MC13xxx SPI interface" if SPI_MASTER + default SPI_MASTER + select REGMAP_SPI + help + Select this if your MC13xxx is connected via an SPI bus. + +endif + config ABX500_CORE bool "ST-Ericsson ABX500 Mixed Signal Circuit register functions" default y if ARCH_U300 || ARCH_U8500 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index c4500c35d5ba..7ce5b5c15dee 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_TWL6030_PWM) += twl6030-pwm.o obj-$(CONFIG_TWL6040_CORE) += twl6040-core.o twl6040-irq.o obj-$(CONFIG_MFD_MC13XXX) += mc13xxx-core.o +obj-$(CONFIG_MFD_MC13XXX_SPI) += mc13xxx-spi.o obj-$(CONFIG_MFD_CORE) += mfd-core.o diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c index d761a2e54b98..13a32b795615 100644 --- a/drivers/mfd/mc13xxx-core.c +++ b/drivers/mfd/mc13xxx-core.c @@ -15,36 +15,13 @@ #include #include #include -#include #include #include #include #include #include -#include -#include -enum mc13xxx_id { - MC13XXX_ID_MC13783, - MC13XXX_ID_MC13892, - MC13XXX_ID_INVALID, -}; - -struct mc13xxx { - struct regmap *regmap; - - struct device *dev; - enum mc13xxx_id ictype; - - struct mutex lock; - int irq; - int flags; - - irq_handler_t irqhandler[MC13XXX_NUM_IRQ]; - void *irqdata[MC13XXX_NUM_IRQ]; - - int adcflags; -}; +#include "mc13xxx.h" #define MC13XXX_IRQSTAT0 0 #define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0) @@ -151,8 +128,6 @@ struct mc13xxx { #define MC13XXX_ADC2 45 -#define MC13XXX_NUMREGS 0x3f - void mc13xxx_lock(struct mc13xxx *mc13xxx) { if (!mutex_trylock(&mc13xxx->lock)) { @@ -674,90 +649,7 @@ static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx) } #endif -static const struct spi_device_id mc13xxx_device_id[] = { - { - .name = "mc13783", - .driver_data = MC13XXX_ID_MC13783, - }, { - .name = "mc13892", - .driver_data = MC13XXX_ID_MC13892, - }, { - /* sentinel */ - } -}; -MODULE_DEVICE_TABLE(spi, mc13xxx_device_id); - -static const struct of_device_id mc13xxx_dt_ids[] = { - { .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, }, - { .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); - -static struct regmap_config mc13xxx_regmap_spi_config = { - .reg_bits = 7, - .pad_bits = 1, - .val_bits = 24, - - .max_register = MC13XXX_NUMREGS, - - .cache_type = REGCACHE_NONE, -}; - -static int mc13xxx_common_init(struct mc13xxx *mc13xxx, - struct mc13xxx_platform_data *pdata, int irq); - -static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx); - -static int mc13xxx_spi_probe(struct spi_device *spi) -{ - const struct of_device_id *of_id; - struct spi_driver *sdrv = to_spi_driver(spi->dev.driver); - struct mc13xxx *mc13xxx; - struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev); - int ret; - - of_id = of_match_device(mc13xxx_dt_ids, &spi->dev); - if (of_id) - sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data]; - - mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL); - if (!mc13xxx) - return -ENOMEM; - - dev_set_drvdata(&spi->dev, mc13xxx); - spi->mode = SPI_MODE_0 | SPI_CS_HIGH; - spi->bits_per_word = 32; - - mc13xxx->dev = &spi->dev; - mutex_init(&mc13xxx->lock); - - mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config); - if (IS_ERR(mc13xxx->regmap)) { - ret = PTR_ERR(mc13xxx->regmap); - dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n", - ret); - dev_set_drvdata(&spi->dev, NULL); - kfree(mc13xxx); - return ret; - } - - ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq); - - if (ret) { - dev_set_drvdata(&spi->dev, NULL); - } else { - const struct spi_device_id *devid = - spi_get_device_id(spi); - if (!devid || devid->driver_data != mc13xxx->ictype) - dev_warn(mc13xxx->dev, - "device id doesn't match auto detection!\n"); - } - - return ret; -} - -static int mc13xxx_common_init(struct mc13xxx *mc13xxx, +int mc13xxx_common_init(struct mc13xxx *mc13xxx, struct mc13xxx_platform_data *pdata, int irq) { int ret; @@ -823,17 +715,9 @@ err_revision: return 0; } +EXPORT_SYMBOL_GPL(mc13xxx_common_init); -static int __devexit mc13xxx_spi_remove(struct spi_device *spi) -{ - struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev); - - mc13xxx_common_cleanup(mc13xxx); - - return 0; -} - -static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx) +void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx) { free_irq(mc13xxx->irq, mc13xxx); @@ -843,29 +727,7 @@ static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx) kfree(mc13xxx); } - -static struct spi_driver mc13xxx_spi_driver = { - .id_table = mc13xxx_device_id, - .driver = { - .name = "mc13xxx", - .owner = THIS_MODULE, - .of_match_table = mc13xxx_dt_ids, - }, - .probe = mc13xxx_spi_probe, - .remove = __devexit_p(mc13xxx_spi_remove), -}; - -static int __init mc13xxx_init(void) -{ - return spi_register_driver(&mc13xxx_spi_driver); -} -subsys_initcall(mc13xxx_init); - -static void __exit mc13xxx_exit(void) -{ - spi_unregister_driver(&mc13xxx_spi_driver); -} -module_exit(mc13xxx_exit); +EXPORT_SYMBOL_GPL(mc13xxx_common_cleanup); MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC"); MODULE_AUTHOR("Uwe Kleine-Koenig "); diff --git a/drivers/mfd/mc13xxx-spi.c b/drivers/mfd/mc13xxx-spi.c new file mode 100644 index 000000000000..3fcdab3eb8eb --- /dev/null +++ b/drivers/mfd/mc13xxx-spi.c @@ -0,0 +1,140 @@ +/* + * Copyright 2009-2010 Pengutronix + * Uwe Kleine-Koenig + * + * loosely based on an earlier driver that has + * Copyright 2009 Pengutronix, Sascha Hauer + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License version 2 as published by the + * Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mc13xxx.h" + +static const struct spi_device_id mc13xxx_device_id[] = { + { + .name = "mc13783", + .driver_data = MC13XXX_ID_MC13783, + }, { + .name = "mc13892", + .driver_data = MC13XXX_ID_MC13892, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(spi, mc13xxx_device_id); + +static const struct of_device_id mc13xxx_dt_ids[] = { + { .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, }, + { .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); + +static struct regmap_config mc13xxx_regmap_spi_config = { + .reg_bits = 7, + .pad_bits = 1, + .val_bits = 24, + + .max_register = MC13XXX_NUMREGS, + + .cache_type = REGCACHE_NONE, +}; + +static int mc13xxx_spi_probe(struct spi_device *spi) +{ + const struct of_device_id *of_id; + struct spi_driver *sdrv = to_spi_driver(spi->dev.driver); + struct mc13xxx *mc13xxx; + struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev); + int ret; + + of_id = of_match_device(mc13xxx_dt_ids, &spi->dev); + if (of_id) + sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data]; + + mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL); + if (!mc13xxx) + return -ENOMEM; + + dev_set_drvdata(&spi->dev, mc13xxx); + spi->mode = SPI_MODE_0 | SPI_CS_HIGH; + spi->bits_per_word = 32; + + mc13xxx->dev = &spi->dev; + mutex_init(&mc13xxx->lock); + + mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config); + if (IS_ERR(mc13xxx->regmap)) { + ret = PTR_ERR(mc13xxx->regmap); + dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n", + ret); + dev_set_drvdata(&spi->dev, NULL); + kfree(mc13xxx); + return ret; + } + + ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq); + + if (ret) { + dev_set_drvdata(&spi->dev, NULL); + } else { + const struct spi_device_id *devid = + spi_get_device_id(spi); + if (!devid || devid->driver_data != mc13xxx->ictype) + dev_warn(mc13xxx->dev, + "device id doesn't match auto detection!\n"); + } + + return ret; +} + +static int __devexit mc13xxx_spi_remove(struct spi_device *spi) +{ + struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev); + + mc13xxx_common_cleanup(mc13xxx); + + return 0; +} + +static struct spi_driver mc13xxx_spi_driver = { + .id_table = mc13xxx_device_id, + .driver = { + .name = "mc13xxx", + .owner = THIS_MODULE, + .of_match_table = mc13xxx_dt_ids, + }, + .probe = mc13xxx_spi_probe, + .remove = __devexit_p(mc13xxx_spi_remove), +}; + +static int __init mc13xxx_init(void) +{ + return spi_register_driver(&mc13xxx_spi_driver); +} +subsys_initcall(mc13xxx_init); + +static void __exit mc13xxx_exit(void) +{ + spi_unregister_driver(&mc13xxx_spi_driver); +} +module_exit(mc13xxx_exit); + +MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC"); +MODULE_AUTHOR("Uwe Kleine-Koenig "); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/mfd/mc13xxx.h b/drivers/mfd/mc13xxx.h new file mode 100644 index 000000000000..bbba06feea06 --- /dev/null +++ b/drivers/mfd/mc13xxx.h @@ -0,0 +1,45 @@ +/* + * Copyright 2012 Creative Product Design + * Marc Reilly + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License version 2 as published by the + * Free Software Foundation. + */ +#ifndef __DRIVERS_MFD_MC13XXX_H +#define __DRIVERS_MFD_MC13XXX_H + +#include +#include +#include + +enum mc13xxx_id { + MC13XXX_ID_MC13783, + MC13XXX_ID_MC13892, + MC13XXX_ID_INVALID, +}; + +#define MC13XXX_NUMREGS 0x3f + +struct mc13xxx { + struct regmap *regmap; + + struct device *dev; + enum mc13xxx_id ictype; + + struct mutex lock; + int irq; + int flags; + + irq_handler_t irqhandler[MC13XXX_NUM_IRQ]; + void *irqdata[MC13XXX_NUM_IRQ]; + + int adcflags; +}; + +int mc13xxx_common_init(struct mc13xxx *mc13xxx, + struct mc13xxx_platform_data *pdata, int irq); + +void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx); + +#endif /* __DRIVERS_MFD_MC13XXX_H */ -- cgit v1.2.3-58-ga151