diff options
author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2012-07-12 09:57:52 +0000 |
---|---|---|
committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-11-06 23:11:42 +0100 |
commit | cd0f34b08f98af72bb2f74fe4bd251558fc734d3 (patch) | |
tree | caee50770690b553ffbc10df5fb031fdde5e187c | |
parent | 5e53a69b44e893227b046a7bc74db3cb40d7f39b (diff) | |
download | op-kernel-dev-cd0f34b08f98af72bb2f74fe4bd251558fc734d3.zip op-kernel-dev-cd0f34b08f98af72bb2f74fe4bd251558fc734d3.tar.gz |
mfd: mc13xxx: Change probing details for mc13xxx devices
This removes auto-detection of which variant of mc13xxx is used because
mc34708 uses a different layout in the revision register that doesn't
allow differentiation any more.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Marc Reilly <marc@cpdesign.com.au>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
-rw-r--r-- | drivers/mfd/mc13xxx-core.c | 77 | ||||
-rw-r--r-- | drivers/mfd/mc13xxx-i2c.c | 16 | ||||
-rw-r--r-- | drivers/mfd/mc13xxx-spi.c | 25 | ||||
-rw-r--r-- | drivers/mfd/mc13xxx.h | 17 |
4 files changed, 60 insertions, 75 deletions
diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c index 1aba023..40afdb9 100644 --- a/drivers/mfd/mc13xxx-core.c +++ b/drivers/mfd/mc13xxx-core.c @@ -410,62 +410,36 @@ static irqreturn_t mc13xxx_irq_thread(int irq, void *data) return IRQ_RETVAL(handled); } -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) +static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision) { - u32 icid; - u32 revision; - 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; - - icid = (icid >> 6) & 0x7; - - switch (icid) { - case 2: - mc13xxx->ictype = MC13XXX_ID_MC13783; - break; - case 7: - mc13xxx->ictype = MC13XXX_ID_MC13892; - break; - default: - mc13xxx->ictype = MC13XXX_ID_INVALID; - break; - } + dev_info(mc13xxx->dev, "%s: rev: %d.%d, " + "fin: %d, fab: %d, icid: %d/%d\n", + mc13xxx->variant->name, + maskval(revision, MC13XXX_REVISION_REVFULL), + maskval(revision, MC13XXX_REVISION_REVMETAL), + maskval(revision, MC13XXX_REVISION_FIN), + maskval(revision, MC13XXX_REVISION_FAB), + maskval(revision, MC13XXX_REVISION_ICID), + maskval(revision, MC13XXX_REVISION_ICIDCODE)); +} - if (mc13xxx->ictype == MC13XXX_ID_MC13783 || - mc13xxx->ictype == MC13XXX_ID_MC13892) { - ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision); - - dev_info(mc13xxx->dev, "%s: rev: %d.%d, " - "fin: %d, fab: %d, icid: %d/%d\n", - mc13xxx_chipname[mc13xxx->ictype], - maskval(revision, MC13XXX_REVISION_REVFULL), - maskval(revision, MC13XXX_REVISION_REVMETAL), - maskval(revision, MC13XXX_REVISION_FIN), - maskval(revision, MC13XXX_REVISION_FAB), - maskval(revision, MC13XXX_REVISION_ICID), - maskval(revision, MC13XXX_REVISION_ICIDCODE)); - } +/* These are only exported for mc13xxx-i2c and mc13xxx-spi */ +struct mc13xxx_variant mc13xxx_variant_mc13783 = { + .name = "mc13783", + .print_revision = mc13xxx_print_revision, +}; +EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783); - return (mc13xxx->ictype == MC13XXX_ID_INVALID) ? -ENODEV : 0; -} +struct mc13xxx_variant mc13xxx_variant_mc13892 = { + .name = "mc13892", + .print_revision = mc13xxx_print_revision, +}; +EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892); static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx) { - return mc13xxx_chipname[mc13xxx->ictype]; + return mc13xxx->variant->name; } int mc13xxx_get_flags(struct mc13xxx *mc13xxx) @@ -653,13 +627,16 @@ int mc13xxx_common_init(struct mc13xxx *mc13xxx, struct mc13xxx_platform_data *pdata, int irq) { int ret; + u32 revision; mc13xxx_lock(mc13xxx); - ret = mc13xxx_identify(mc13xxx); + ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision); if (ret) goto err_revision; + mc13xxx->variant->print_revision(mc13xxx, revision); + /* mask all irqs */ ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff); if (ret) diff --git a/drivers/mfd/mc13xxx-i2c.c b/drivers/mfd/mc13xxx-i2c.c index 9d18dde..4a0afc7 100644 --- a/drivers/mfd/mc13xxx-i2c.c +++ b/drivers/mfd/mc13xxx-i2c.c @@ -24,7 +24,7 @@ static const struct i2c_device_id mc13xxx_i2c_device_id[] = { { .name = "mc13892", - .driver_data = MC13XXX_ID_MC13892, + .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892, }, { /* sentinel */ } @@ -34,7 +34,7 @@ MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id); static const struct of_device_id mc13xxx_dt_ids[] = { { .compatible = "fsl,mc13892", - .data = (void *) &mc13xxx_i2c_device_id[0], + .data = &mc13xxx_variant_mc13892, }, { /* sentinel */ } @@ -76,11 +76,15 @@ static int mc13xxx_i2c_probe(struct i2c_client *client, return ret; } - ret = mc13xxx_common_init(mc13xxx, pdata, client->irq); + if (client->dev.of_node) { + const struct of_device_id *of_id = + of_match_device(mc13xxx_dt_ids, &client->dev); + mc13xxx->variant = of_id->data; + } else { + mc13xxx->variant = (void *)id->driver_data; + } - if (ret == 0 && (id->driver_data != mc13xxx->ictype)) - dev_warn(mc13xxx->dev, - "device id doesn't match auto detection!\n"); + ret = mc13xxx_common_init(mc13xxx, pdata, client->irq); return ret; } diff --git a/drivers/mfd/mc13xxx-spi.c b/drivers/mfd/mc13xxx-spi.c index 0bdb43a..9b1e608 100644 --- a/drivers/mfd/mc13xxx-spi.c +++ b/drivers/mfd/mc13xxx-spi.c @@ -28,10 +28,10 @@ static const struct spi_device_id mc13xxx_device_id[] = { { .name = "mc13783", - .driver_data = MC13XXX_ID_MC13783, + .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13783, }, { .name = "mc13892", - .driver_data = MC13XXX_ID_MC13892, + .driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892, }, { /* sentinel */ } @@ -39,8 +39,8 @@ static const struct spi_device_id mc13xxx_device_id[] = { 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, }, + { .compatible = "fsl,mc13783", .data = &mc13xxx_variant_mc13783, }, + { .compatible = "fsl,mc13892", .data = &mc13xxx_variant_mc13892, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids); @@ -144,19 +144,18 @@ static int mc13xxx_spi_probe(struct spi_device *spi) return ret; } - ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq); + if (spi->dev.of_node) { + const struct of_device_id *of_id = + of_match_device(mc13xxx_dt_ids, &spi->dev); - if (ret) { - dev_set_drvdata(&spi->dev, NULL); + mc13xxx->variant = of_id->data; } 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"); + const struct spi_device_id *id_entry = spi_get_device_id(spi); + + mc13xxx->variant = (void *)id_entry->driver_data; } - return ret; + return mc13xxx_common_init(mc13xxx, pdata, spi->irq); } static int __devexit mc13xxx_spi_remove(struct spi_device *spi) diff --git a/drivers/mfd/mc13xxx.h b/drivers/mfd/mc13xxx.h index bbba06f..78bf4c3 100644 --- a/drivers/mfd/mc13xxx.h +++ b/drivers/mfd/mc13xxx.h @@ -13,19 +13,24 @@ #include <linux/regmap.h> #include <linux/mfd/mc13xxx.h> -enum mc13xxx_id { - MC13XXX_ID_MC13783, - MC13XXX_ID_MC13892, - MC13XXX_ID_INVALID, +#define MC13XXX_NUMREGS 0x3f + +struct mc13xxx; + +struct mc13xxx_variant { + const char *name; + void (*print_revision)(struct mc13xxx *mc13xxx, u32 revision); }; -#define MC13XXX_NUMREGS 0x3f +extern struct mc13xxx_variant + mc13xxx_variant_mc13783, + mc13xxx_variant_mc13892; struct mc13xxx { struct regmap *regmap; struct device *dev; - enum mc13xxx_id ictype; + const struct mc13xxx_variant *variant; struct mutex lock; int irq; |