From e1811f97ba985fef3f703f55aeb5d23660c919ef Mon Sep 17 00:00:00 2001 From: Josh Wu Date: Tue, 27 Aug 2013 12:28:00 +0100 Subject: 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 Acked-by: Maxime Ripard Signed-off-by: Jonathan Cameron --- drivers/iio/adc/at91_adc.c | 79 ++++++++++++++++++++++++---------------------- 1 file changed, 41 insertions(+), 38 deletions(-) (limited to 'drivers/iio') diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index 423e079460d3..ed5eebc93bb7 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); -- cgit v1.2.3