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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>
This commit is contained in:
Uwe Kleine-König
Samuel Ortiz
parent
5e53a69b44
commit
cd0f34b08f
@ -410,62 +410,36 @@ static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
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return IRQ_RETVAL(handled);
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}
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static const char *mc13xxx_chipname[] = {
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[MC13XXX_ID_MC13783] = "mc13783",
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[MC13XXX_ID_MC13892] = "mc13892",
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};
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#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
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static int mc13xxx_identify(struct mc13xxx *mc13xxx)
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static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
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{
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u32 icid;
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u32 revision;
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int ret;
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/*
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* Get the generation ID from register 46, as apparently some older
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* IC revisions only have this info at this location. Newer ICs seem to
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* have both.
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*/
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ret = mc13xxx_reg_read(mc13xxx, 46, &icid);
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if (ret)
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return ret;
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icid = (icid >> 6) & 0x7;
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switch (icid) {
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case 2:
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mc13xxx->ictype = MC13XXX_ID_MC13783;
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break;
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case 7:
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mc13xxx->ictype = MC13XXX_ID_MC13892;
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break;
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default:
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mc13xxx->ictype = MC13XXX_ID_INVALID;
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break;
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}
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if (mc13xxx->ictype == MC13XXX_ID_MC13783 ||
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mc13xxx->ictype == MC13XXX_ID_MC13892) {
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ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
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dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
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"fin: %d, fab: %d, icid: %d/%d\n",
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mc13xxx_chipname[mc13xxx->ictype],
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maskval(revision, MC13XXX_REVISION_REVFULL),
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maskval(revision, MC13XXX_REVISION_REVMETAL),
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maskval(revision, MC13XXX_REVISION_FIN),
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maskval(revision, MC13XXX_REVISION_FAB),
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maskval(revision, MC13XXX_REVISION_ICID),
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maskval(revision, MC13XXX_REVISION_ICIDCODE));
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}
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return (mc13xxx->ictype == MC13XXX_ID_INVALID) ? -ENODEV : 0;
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dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
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"fin: %d, fab: %d, icid: %d/%d\n",
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mc13xxx->variant->name,
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maskval(revision, MC13XXX_REVISION_REVFULL),
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maskval(revision, MC13XXX_REVISION_REVMETAL),
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maskval(revision, MC13XXX_REVISION_FIN),
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maskval(revision, MC13XXX_REVISION_FAB),
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maskval(revision, MC13XXX_REVISION_ICID),
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maskval(revision, MC13XXX_REVISION_ICIDCODE));
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}
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/* These are only exported for mc13xxx-i2c and mc13xxx-spi */
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struct mc13xxx_variant mc13xxx_variant_mc13783 = {
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.name = "mc13783",
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.print_revision = mc13xxx_print_revision,
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};
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EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
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struct mc13xxx_variant mc13xxx_variant_mc13892 = {
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.name = "mc13892",
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.print_revision = mc13xxx_print_revision,
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};
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EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
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static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
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{
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return mc13xxx_chipname[mc13xxx->ictype];
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return mc13xxx->variant->name;
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}
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int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
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@ -653,13 +627,16 @@ int mc13xxx_common_init(struct mc13xxx *mc13xxx,
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struct mc13xxx_platform_data *pdata, int irq)
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{
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int ret;
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u32 revision;
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mc13xxx_lock(mc13xxx);
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ret = mc13xxx_identify(mc13xxx);
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ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
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if (ret)
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goto err_revision;
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mc13xxx->variant->print_revision(mc13xxx, revision);
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/* mask all irqs */
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ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
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if (ret)
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@ -24,7 +24,7 @@
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static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
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{
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.name = "mc13892",
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.driver_data = MC13XXX_ID_MC13892,
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.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
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}, {
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/* sentinel */
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}
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@ -34,7 +34,7 @@ MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
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static const struct of_device_id mc13xxx_dt_ids[] = {
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{
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.compatible = "fsl,mc13892",
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.data = (void *) &mc13xxx_i2c_device_id[0],
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.data = &mc13xxx_variant_mc13892,
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}, {
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/* sentinel */
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}
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@ -76,11 +76,15 @@ static int mc13xxx_i2c_probe(struct i2c_client *client,
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return ret;
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}
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ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
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if (client->dev.of_node) {
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const struct of_device_id *of_id =
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of_match_device(mc13xxx_dt_ids, &client->dev);
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mc13xxx->variant = of_id->data;
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} else {
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mc13xxx->variant = (void *)id->driver_data;
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}
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if (ret == 0 && (id->driver_data != mc13xxx->ictype))
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dev_warn(mc13xxx->dev,
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"device id doesn't match auto detection!\n");
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ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
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return ret;
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}
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@ -28,10 +28,10 @@
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static const struct spi_device_id mc13xxx_device_id[] = {
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{
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.name = "mc13783",
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.driver_data = MC13XXX_ID_MC13783,
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.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13783,
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}, {
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.name = "mc13892",
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.driver_data = MC13XXX_ID_MC13892,
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.driver_data = (kernel_ulong_t)&mc13xxx_variant_mc13892,
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}, {
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/* sentinel */
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}
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@ -39,8 +39,8 @@ static const struct spi_device_id mc13xxx_device_id[] = {
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MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
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static const struct of_device_id mc13xxx_dt_ids[] = {
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{ .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
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{ .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
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{ .compatible = "fsl,mc13783", .data = &mc13xxx_variant_mc13783, },
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{ .compatible = "fsl,mc13892", .data = &mc13xxx_variant_mc13892, },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
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@ -144,19 +144,18 @@ static int mc13xxx_spi_probe(struct spi_device *spi)
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return ret;
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}
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ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
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if (spi->dev.of_node) {
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const struct of_device_id *of_id =
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of_match_device(mc13xxx_dt_ids, &spi->dev);
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if (ret) {
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dev_set_drvdata(&spi->dev, NULL);
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mc13xxx->variant = of_id->data;
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} else {
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const struct spi_device_id *devid =
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spi_get_device_id(spi);
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if (!devid || devid->driver_data != mc13xxx->ictype)
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dev_warn(mc13xxx->dev,
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"device id doesn't match auto detection!\n");
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const struct spi_device_id *id_entry = spi_get_device_id(spi);
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mc13xxx->variant = (void *)id_entry->driver_data;
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}
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return ret;
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return mc13xxx_common_init(mc13xxx, pdata, spi->irq);
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}
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static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
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@ -13,19 +13,24 @@
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#include <linux/regmap.h>
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#include <linux/mfd/mc13xxx.h>
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enum mc13xxx_id {
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MC13XXX_ID_MC13783,
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MC13XXX_ID_MC13892,
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MC13XXX_ID_INVALID,
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#define MC13XXX_NUMREGS 0x3f
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struct mc13xxx;
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struct mc13xxx_variant {
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const char *name;
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void (*print_revision)(struct mc13xxx *mc13xxx, u32 revision);
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};
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#define MC13XXX_NUMREGS 0x3f
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extern struct mc13xxx_variant
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mc13xxx_variant_mc13783,
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mc13xxx_variant_mc13892;
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struct mc13xxx {
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struct regmap *regmap;
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struct device *dev;
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enum mc13xxx_id ictype;
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const struct mc13xxx_variant *variant;
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struct mutex lock;
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int irq;
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