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authorJosh Wu <josh.wu@atmel.com>2013-08-27 12:28:00 +0100
committerJonathan Cameron <jic23@kernel.org>2013-08-29 21:45:04 +0100
commite1811f97ba985fef3f703f55aeb5d23660c919ef (patch)
tree4cf474f2e516d1d60bf9fb1de89f4b60735d3364 /drivers/iio
parent2d2da9fc7113ee5df06519e435f2f9430acf40c5 (diff)
downloadop-kernel-dev-e1811f97ba985fef3f703f55aeb5d23660c919ef.zip
op-kernel-dev-e1811f97ba985fef3f703f55aeb5d23660c919ef.tar.gz
iio: at91: introduce the multiple compatible string for different IPs.
As use the multiple compatible string, we can remove hardware register in dt. CC: devicetree@vger.kernel.org Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/at91_adc.c79
1 files changed, 41 insertions, 38 deletions
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 423e079..ed5eebc 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -39,6 +39,10 @@
#define at91_adc_writel(st, reg, val) \
(writel_relaxed(val, st->reg_base + reg))
+struct at91_adc_caps {
+ struct at91_adc_reg_desc registers;
+};
+
struct at91_adc_state {
struct clk *adc_clk;
u16 *buffer;
@@ -62,6 +66,7 @@ struct at91_adc_state {
u32 res; /* resolution used for convertions */
bool low_res; /* the resolution corresponds to the lowest one */
wait_queue_head_t wq_data_avail;
+ struct at91_adc_caps *caps;
};
static irqreturn_t at91_adc_trigger_handler(int irq, void *p)
@@ -429,6 +434,8 @@ ret:
return ret;
}
+static const struct of_device_id at91_adc_dt_ids[];
+
static int at91_adc_probe_dt(struct at91_adc_state *st,
struct platform_device *pdev)
{
@@ -441,6 +448,9 @@ static int at91_adc_probe_dt(struct at91_adc_state *st,
if (!node)
return -EINVAL;
+ st->caps = (struct at91_adc_caps *)
+ of_match_device(at91_adc_dt_ids, &pdev->dev)->data;
+
st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers");
if (of_property_read_u32(node, "atmel,adc-channels-used", &prop)) {
@@ -481,43 +491,7 @@ static int at91_adc_probe_dt(struct at91_adc_state *st,
if (ret)
goto error_ret;
- st->registers = devm_kzalloc(&idev->dev,
- sizeof(struct at91_adc_reg_desc),
- GFP_KERNEL);
- if (!st->registers) {
- dev_err(&idev->dev, "Could not allocate register memory.\n");
- ret = -ENOMEM;
- goto error_ret;
- }
-
- if (of_property_read_u32(node, "atmel,adc-channel-base", &prop)) {
- dev_err(&idev->dev, "Missing adc-channel-base property in the DT.\n");
- ret = -EINVAL;
- goto error_ret;
- }
- st->registers->channel_base = prop;
-
- if (of_property_read_u32(node, "atmel,adc-drdy-mask", &prop)) {
- dev_err(&idev->dev, "Missing adc-drdy-mask property in the DT.\n");
- ret = -EINVAL;
- goto error_ret;
- }
- st->registers->drdy_mask = prop;
-
- if (of_property_read_u32(node, "atmel,adc-status-register", &prop)) {
- dev_err(&idev->dev, "Missing adc-status-register property in the DT.\n");
- ret = -EINVAL;
- goto error_ret;
- }
- st->registers->status_register = prop;
-
- if (of_property_read_u32(node, "atmel,adc-trigger-register", &prop)) {
- dev_err(&idev->dev, "Missing adc-trigger-register property in the DT.\n");
- ret = -EINVAL;
- goto error_ret;
- }
- st->registers->trigger_register = prop;
-
+ st->registers = &st->caps->registers;
st->trigger_number = of_get_child_count(node);
st->trigger_list = devm_kzalloc(&idev->dev, st->trigger_number *
sizeof(struct at91_adc_trigger),
@@ -766,8 +740,37 @@ static int at91_adc_remove(struct platform_device *pdev)
}
#ifdef CONFIG_OF
+static struct at91_adc_caps at91sam9260_caps = {
+ .registers = {
+ .channel_base = AT91_ADC_CHR(0),
+ .drdy_mask = AT91_ADC_DRDY,
+ .status_register = AT91_ADC_SR,
+ .trigger_register = AT91_ADC_TRGR_9260,
+ },
+};
+
+static struct at91_adc_caps at91sam9g45_caps = {
+ .registers = {
+ .channel_base = AT91_ADC_CHR(0),
+ .drdy_mask = AT91_ADC_DRDY,
+ .status_register = AT91_ADC_SR,
+ .trigger_register = AT91_ADC_TRGR_9G45,
+ },
+};
+
+static struct at91_adc_caps at91sam9x5_caps = {
+ .registers = {
+ .channel_base = AT91_ADC_CDR0_9X5,
+ .drdy_mask = AT91_ADC_SR_DRDY_9X5,
+ .status_register = AT91_ADC_SR_9X5,
+ .trigger_register = AT91_ADC_TRGR_9X5,
+ },
+};
+
static const struct of_device_id at91_adc_dt_ids[] = {
- { .compatible = "atmel,at91sam9260-adc" },
+ { .compatible = "atmel,at91sam9260-adc", .data = &at91sam9260_caps },
+ { .compatible = "atmel,at91sam9g45-adc", .data = &at91sam9g45_caps },
+ { .compatible = "atmel,at91sam9x5-adc", .data = &at91sam9x5_caps },
{},
};
MODULE_DEVICE_TABLE(of, at91_adc_dt_ids);
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