iio: at91: introduce the multiple compatible string for different IPs.

[karo-tx-linux.git] / drivers / iio / adc / at91_adc.c

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 423e079460d3a3468c1bd677cfd8c0bda53753e5..ed5eebc93bb742136739e5bd6b6ed3ddfca81468 100644 (file)
--- 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);