From 100cf81d92e461f6cb602e467785e4fca75b224d Mon Sep 17 00:00:00 2001 From: Simon Xue Date: Fri, 7 Apr 2023 18:16:38 +0530 Subject: [PATCH 436/469] iio: adc: rockchip_saradc: Add callback functions Add start, read and power_down callback functions, which will help in adding new rockchip device support cleanly. Signed-off-by: Simon Xue Signed-off-by: Shreeya Patel --- drivers/iio/adc/rockchip_saradc.c | 64 +++++++++++++++++++++++++------ 1 file changed, 52 insertions(+), 12 deletions(-) diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c index 79448c5ffc2a..21f9d92a6af4 100644 --- a/drivers/iio/adc/rockchip_saradc.c +++ b/drivers/iio/adc/rockchip_saradc.c @@ -38,10 +38,15 @@ #define SARADC_TIMEOUT msecs_to_jiffies(100) #define SARADC_MAX_CHANNELS 8 +struct rockchip_saradc; + struct rockchip_saradc_data { const struct iio_chan_spec *channels; int num_channels; unsigned long clk_rate; + void (*start)(struct rockchip_saradc *info, int chn); + int (*read)(struct rockchip_saradc *info); + void (*power_down)(struct rockchip_saradc *info); }; struct rockchip_saradc { @@ -60,27 +65,50 @@ struct rockchip_saradc { struct notifier_block nb; }; -static void rockchip_saradc_power_down(struct rockchip_saradc *info) +static void rockchip_saradc_reset_controller(struct reset_control *reset); + +static void rockchip_saradc_start_v1(struct rockchip_saradc *info, int chn) +{ + /* 8 clock periods as delay between power up and start cmd */ + writel_relaxed(8, info->regs + SARADC_DLY_PU_SOC); + /* Select the channel to be used and trigger conversion */ + writel(SARADC_CTRL_POWER_CTRL | (chn & SARADC_CTRL_CHN_MASK) | + SARADC_CTRL_IRQ_ENABLE, info->regs + SARADC_CTRL); +} + +static void rockchip_saradc_start(struct rockchip_saradc *info, int chn) +{ + info->data->start(info, chn); +} + +static int rockchip_saradc_read_v1(struct rockchip_saradc *info) +{ + return readl_relaxed(info->regs + SARADC_DATA); +} + +static int rockchip_saradc_read(struct rockchip_saradc *info) +{ + return info->data->read(info); +} + +static void rockchip_saradc_power_down_v1(struct rockchip_saradc *info) { - /* Clear irq & power down adc */ writel_relaxed(0, info->regs + SARADC_CTRL); } +static void rockchip_saradc_power_down(struct rockchip_saradc *info) +{ + if (info->data->power_down) + info->data->power_down(info); +} + static int rockchip_saradc_conversion(struct rockchip_saradc *info, struct iio_chan_spec const *chan) { reinit_completion(&info->completion); - /* 8 clock periods as delay between power up and start cmd */ - writel_relaxed(8, info->regs + SARADC_DLY_PU_SOC); - info->last_chan = chan; - - /* Select the channel to be used and trigger conversion */ - writel(SARADC_CTRL_POWER_CTRL - | (chan->channel & SARADC_CTRL_CHN_MASK) - | SARADC_CTRL_IRQ_ENABLE, - info->regs + SARADC_CTRL); + rockchip_saradc_start(info, chan->channel); if (!wait_for_completion_timeout(&info->completion, SARADC_TIMEOUT)) return -ETIMEDOUT; @@ -123,7 +151,7 @@ static irqreturn_t rockchip_saradc_isr(int irq, void *dev_id) struct rockchip_saradc *info = dev_id; /* Read value */ - info->last_val = readl_relaxed(info->regs + SARADC_DATA); + info->last_val = rockchip_saradc_read(info); info->last_val &= GENMASK(info->last_chan->scan_type.realbits - 1, 0); rockchip_saradc_power_down(info); @@ -163,6 +191,9 @@ static const struct rockchip_saradc_data saradc_data = { .channels = rockchip_saradc_iio_channels, .num_channels = ARRAY_SIZE(rockchip_saradc_iio_channels), .clk_rate = 1000000, + .start = rockchip_saradc_start_v1, + .read = rockchip_saradc_read_v1, + .power_down = rockchip_saradc_power_down_v1, }; static const struct iio_chan_spec rockchip_rk3066_tsadc_iio_channels[] = { @@ -174,6 +205,9 @@ static const struct rockchip_saradc_data rk3066_tsadc_data = { .channels = rockchip_rk3066_tsadc_iio_channels, .num_channels = ARRAY_SIZE(rockchip_rk3066_tsadc_iio_channels), .clk_rate = 50000, + .start = rockchip_saradc_start_v1, + .read = rockchip_saradc_read_v1, + .power_down = rockchip_saradc_power_down_v1, }; static const struct iio_chan_spec rockchip_rk3399_saradc_iio_channels[] = { @@ -189,6 +223,9 @@ static const struct rockchip_saradc_data rk3399_saradc_data = { .channels = rockchip_rk3399_saradc_iio_channels, .num_channels = ARRAY_SIZE(rockchip_rk3399_saradc_iio_channels), .clk_rate = 1000000, + .start = rockchip_saradc_start_v1, + .read = rockchip_saradc_read_v1, + .power_down = rockchip_saradc_power_down_v1, }; static const struct iio_chan_spec rockchip_rk3568_saradc_iio_channels[] = { @@ -206,6 +243,9 @@ static const struct rockchip_saradc_data rk3568_saradc_data = { .channels = rockchip_rk3568_saradc_iio_channels, .num_channels = ARRAY_SIZE(rockchip_rk3568_saradc_iio_channels), .clk_rate = 1000000, + .start = rockchip_saradc_start_v1, + .read = rockchip_saradc_read_v1, + .power_down = rockchip_saradc_power_down_v1, }; static const struct of_device_id rockchip_saradc_match[] = { -- 2.34.1