From: Quentin Schulz quentin.schulz@theobroma-systems.com
SARADC v1 and v2 have a different way of reading data, therefore let's abstract this function so that it can be provided from the udevice.data pointer.
Cc: Quentin Schulz foss+uboot@0leil.net Reviewed-by: Kever Yang kever.yang@rock-chips.com Signed-off-by: Quentin Schulz quentin.schulz@theobroma-systems.com --- drivers/adc/rockchip-saradc.c | 37 +++++++++++++++++++++++++++++-------- 1 file changed, 29 insertions(+), 8 deletions(-)
diff --git a/drivers/adc/rockchip-saradc.c b/drivers/adc/rockchip-saradc.c index 4a842556a60..1cc57beecc2 100644 --- a/drivers/adc/rockchip-saradc.c +++ b/drivers/adc/rockchip-saradc.c @@ -37,6 +37,7 @@ struct rockchip_saradc_data { int num_bits; int num_channels; unsigned long clk_rate; + int (*channel_data)(struct udevice *dev, int channel, unsigned int *data); };
struct rockchip_saradc_priv { @@ -45,28 +46,45 @@ struct rockchip_saradc_priv { const struct rockchip_saradc_data *data; };
+int rockchip_saradc_channel_data_v1(struct udevice *dev, int channel, + unsigned int *data) +{ + struct rockchip_saradc_priv *priv = dev_get_priv(dev); + + if ((readl(&priv->regs.v1->ctrl) & SARADC_CTRL_IRQ_STATUS) != + SARADC_CTRL_IRQ_STATUS) + return -EBUSY; + + /* Read value */ + *data = readl(&priv->regs.v1->data); + + /* Power down adc */ + writel(0, &priv->regs.v1->ctrl); + + return 0; +} + int rockchip_saradc_channel_data(struct udevice *dev, int channel, unsigned int *data) { struct rockchip_saradc_priv *priv = dev_get_priv(dev); struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev); + int ret;
if (channel != priv->active_channel) { pr_err("Requested channel is not active!"); return -EINVAL; }
- if ((readl(&priv->regs.v1->ctrl) & SARADC_CTRL_IRQ_STATUS) != - SARADC_CTRL_IRQ_STATUS) - return -EBUSY; + ret = priv->data->channel_data(dev, channel, data); + if (ret) { + if (ret != -EBUSY) + pr_err("Error reading channel data, %d!", ret); + return ret; + }
- /* Read value */ - *data = readl(&priv->regs.v1->data); *data &= uc_pdata->data_mask;
- /* Power down adc */ - writel(0, &priv->regs.v1->ctrl); - return 0; }
@@ -174,18 +192,21 @@ static const struct rockchip_saradc_data saradc_data = { .num_bits = 10, .num_channels = 3, .clk_rate = 1000000, + .channel_data = rockchip_saradc_channel_data_v1, };
static const struct rockchip_saradc_data rk3066_tsadc_data = { .num_bits = 12, .num_channels = 2, .clk_rate = 50000, + .channel_data = rockchip_saradc_channel_data_v1, };
static const struct rockchip_saradc_data rk3399_saradc_data = { .num_bits = 10, .num_channels = 6, .clk_rate = 1000000, + .channel_data = rockchip_saradc_channel_data_v1, };
static const struct udevice_id rockchip_saradc_ids[] = {