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-rw-r--r--drivers/clk/ti/clk-43xx.c1
-rw-r--r--drivers/iio/adc/ti_am335x_adc.c220
-rw-r--r--drivers/mfd/ti_am335x_tscadc.c235
-rw-r--r--drivers/regulator/s5m8767.c21
4 files changed, 270 insertions, 207 deletions
diff --git a/drivers/clk/ti/clk-43xx.c b/drivers/clk/ti/clk-43xx.c
index 46c0add99570..6e97a541cfd3 100644
--- a/drivers/clk/ti/clk-43xx.c
+++ b/drivers/clk/ti/clk-43xx.c
@@ -116,6 +116,7 @@ static const struct omap_clkctrl_reg_data am4_l3s_clkctrl_regs[] __initconst = {
{ AM4_L3S_VPFE0_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3S_VPFE1_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3S_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk" },
+ { AM4_L3S_ADC1_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk" },
{ AM4_L3S_MCASP0_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp0_fck" },
{ AM4_L3S_MCASP1_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp1_fck" },
{ AM4_L3S_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 855cc2d64ac8..dbdc1ef48566 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* TI ADC MFD driver
*
* Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/kernel.h>
@@ -25,6 +17,7 @@
#include <linux/of_device.h>
#include <linux/iio/machine.h>
#include <linux/iio/driver.h>
+#include <linux/iopoll.h>
#include <linux/mfd/ti_am335x_tscadc.h>
#include <linux/iio/buffer.h>
@@ -65,7 +58,7 @@ static unsigned int tiadc_readl(struct tiadc_device *adc, unsigned int reg)
}
static void tiadc_writel(struct tiadc_device *adc, unsigned int reg,
- unsigned int val)
+ unsigned int val)
{
writel(val, adc->mfd_tscadc->tscadc_base + reg);
}
@@ -80,7 +73,7 @@ static u32 get_adc_step_mask(struct tiadc_device *adc_dev)
}
static u32 get_adc_chan_step_mask(struct tiadc_device *adc_dev,
- struct iio_chan_spec const *chan)
+ struct iio_chan_spec const *chan)
{
int i;
@@ -102,10 +95,18 @@ static u32 get_adc_step_bit(struct tiadc_device *adc_dev, int chan)
return 1 << adc_dev->channel_step[chan];
}
+static int tiadc_wait_idle(struct tiadc_device *adc_dev)
+{
+ u32 val;
+
+ return readl_poll_timeout(adc_dev->mfd_tscadc->tscadc_base + REG_ADCFSM,
+ val, !(val & SEQ_STATUS), 10,
+ IDLE_TIMEOUT_MS * 1000 * adc_dev->channels);
+}
+
static void tiadc_step_config(struct iio_dev *indio_dev)
{
struct tiadc_device *adc_dev = iio_priv(indio_dev);
- struct device *dev = adc_dev->mfd_tscadc->dev;
unsigned int stepconfig;
int i, steps = 0;
@@ -118,23 +119,14 @@ static void tiadc_step_config(struct iio_dev *indio_dev)
* Channel would represent which analog input
* needs to be given to ADC to digitalize data.
*/
-
-
for (i = 0; i < adc_dev->channels; i++) {
int chan;
chan = adc_dev->channel_line[i];
- if (adc_dev->step_avg[i] > STEPCONFIG_AVG_16) {
- dev_warn(dev, "chan %d step_avg truncating to %d\n",
- chan, STEPCONFIG_AVG_16);
- adc_dev->step_avg[i] = STEPCONFIG_AVG_16;
- }
-
if (adc_dev->step_avg[i])
- stepconfig =
- STEPCONFIG_AVG(ffs(adc_dev->step_avg[i]) - 1) |
- STEPCONFIG_FIFO1;
+ stepconfig = STEPCONFIG_AVG(ffs(adc_dev->step_avg[i]) - 1) |
+ STEPCONFIG_FIFO1;
else
stepconfig = STEPCONFIG_FIFO1;
@@ -142,26 +134,13 @@ static void tiadc_step_config(struct iio_dev *indio_dev)
stepconfig |= STEPCONFIG_MODE_SWCNT;
tiadc_writel(adc_dev, REG_STEPCONFIG(steps),
- stepconfig | STEPCONFIG_INP(chan) |
- STEPCONFIG_INM_ADCREFM |
- STEPCONFIG_RFP_VREFP |
- STEPCONFIG_RFM_VREFN);
-
- if (adc_dev->open_delay[i] > STEPDELAY_OPEN_MASK) {
- dev_warn(dev, "chan %d open delay truncating to 0x3FFFF\n",
- chan);
- adc_dev->open_delay[i] = STEPDELAY_OPEN_MASK;
- }
-
- if (adc_dev->sample_delay[i] > 0xFF) {
- dev_warn(dev, "chan %d sample delay truncating to 0xFF\n",
- chan);
- adc_dev->sample_delay[i] = 0xFF;
- }
+ stepconfig | STEPCONFIG_INP(chan) |
+ STEPCONFIG_INM_ADCREFM | STEPCONFIG_RFP_VREFP |
+ STEPCONFIG_RFM_VREFN);
tiadc_writel(adc_dev, REG_STEPDELAY(steps),
- STEPDELAY_OPEN(adc_dev->open_delay[i]) |
- STEPDELAY_SAMPLE(adc_dev->sample_delay[i]));
+ STEPDELAY_OPEN(adc_dev->open_delay[i]) |
+ STEPDELAY_SAMPLE(adc_dev->sample_delay[i]));
adc_dev->channel_step[i] = steps;
steps++;
@@ -184,12 +163,14 @@ static irqreturn_t tiadc_irq_h(int irq, void *private)
if (status & IRQENB_FIFO1OVRRUN) {
/* FIFO Overrun. Clear flag. Disable/Enable ADC to recover */
config = tiadc_readl(adc_dev, REG_CTRL);
- config &= ~(CNTRLREG_TSCSSENB);
+ config &= ~(CNTRLREG_SSENB);
tiadc_writel(adc_dev, REG_CTRL, config);
- tiadc_writel(adc_dev, REG_IRQSTATUS, IRQENB_FIFO1OVRRUN
- | IRQENB_FIFO1UNDRFLW | IRQENB_FIFO1THRES);
+ tiadc_writel(adc_dev, REG_IRQSTATUS,
+ IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW |
+ IRQENB_FIFO1THRES);
- /* wait for idle state.
+ /*
+ * Wait for the idle state.
* ADC needs to finish the current conversion
* before disabling the module
*/
@@ -197,7 +178,7 @@ static irqreturn_t tiadc_irq_h(int irq, void *private)
adc_fsm = tiadc_readl(adc_dev, REG_ADCFSM);
} while (adc_fsm != 0x10 && count++ < 100);
- tiadc_writel(adc_dev, REG_CTRL, (config | CNTRLREG_TSCSSENB));
+ tiadc_writel(adc_dev, REG_CTRL, (config | CNTRLREG_SSENB));
return IRQ_HANDLED;
} else if (status & IRQENB_FIFO1THRES) {
/* Disable irq and wake worker thread */
@@ -217,11 +198,11 @@ static irqreturn_t tiadc_worker_h(int irq, void *private)
fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
for (k = 0; k < fifo1count; k = k + i) {
- for (i = 0; i < (indio_dev->scan_bytes)/2; i++) {
+ for (i = 0; i < indio_dev->scan_bytes / 2; i++) {
read = tiadc_readl(adc_dev, REG_FIFO1);
data[i] = read & FIFOREAD_DATA_MASK;
}
- iio_push_to_buffers(indio_dev, (u8 *) data);
+ iio_push_to_buffers(indio_dev, (u8 *)data);
}
tiadc_writel(adc_dev, REG_IRQSTATUS, IRQENB_FIFO1THRES);
@@ -254,6 +235,7 @@ static int tiadc_start_dma(struct iio_dev *indio_dev)
struct dma_async_tx_descriptor *desc;
dma->current_period = 0; /* We start to fill period 0 */
+
/*
* Make the fifo thresh as the multiple of total number of
* channels enabled, so make sure that cyclic DMA period
@@ -263,9 +245,10 @@ static int tiadc_start_dma(struct iio_dev *indio_dev)
*/
dma->fifo_thresh = rounddown(FIFO1_THRESHOLD + 1,
adc_dev->total_ch_enabled) - 1;
+
/* Make sure that period length is multiple of fifo thresh level */
dma->period_size = rounddown(DMA_BUFFER_SIZE / 2,
- (dma->fifo_thresh + 1) * sizeof(u16));
+ (dma->fifo_thresh + 1) * sizeof(u16));
dma->conf.src_maxburst = dma->fifo_thresh + 1;
dmaengine_slave_config(dma->chan, &dma->conf);
@@ -295,10 +278,15 @@ static int tiadc_buffer_preenable(struct iio_dev *indio_dev)
{
struct tiadc_device *adc_dev = iio_priv(indio_dev);
int i, fifo1count;
+ int ret;
+
+ ret = tiadc_wait_idle(adc_dev);
+ if (ret)
+ return ret;
- tiadc_writel(adc_dev, REG_IRQCLR, (IRQENB_FIFO1THRES |
- IRQENB_FIFO1OVRRUN |
- IRQENB_FIFO1UNDRFLW));
+ tiadc_writel(adc_dev, REG_IRQCLR,
+ IRQENB_FIFO1THRES | IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW);
/* Flush FIFO. Needed in corner cases in simultaneous tsc/adc use */
fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
@@ -328,8 +316,9 @@ static int tiadc_buffer_postenable(struct iio_dev *indio_dev)
am335x_tsc_se_set_cache(adc_dev->mfd_tscadc, enb);
- tiadc_writel(adc_dev, REG_IRQSTATUS, IRQENB_FIFO1THRES
- | IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW);
+ tiadc_writel(adc_dev, REG_IRQSTATUS,
+ IRQENB_FIFO1THRES | IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW);
irq_enable = IRQENB_FIFO1OVRRUN;
if (!dma->chan)
@@ -345,8 +334,9 @@ static int tiadc_buffer_predisable(struct iio_dev *indio_dev)
struct tiadc_dma *dma = &adc_dev->dma;
int fifo1count, i;
- tiadc_writel(adc_dev, REG_IRQCLR, (IRQENB_FIFO1THRES |
- IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW));
+ tiadc_writel(adc_dev, REG_IRQCLR,
+ IRQENB_FIFO1THRES | IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW);
am335x_tsc_se_clr(adc_dev->mfd_tscadc, adc_dev->buffer_en_ch_steps);
adc_dev->buffer_en_ch_steps = 0;
adc_dev->total_ch_enabled = 0;
@@ -378,12 +368,11 @@ static const struct iio_buffer_setup_ops tiadc_buffer_setup_ops = {
};
static int tiadc_iio_buffered_hardware_setup(struct device *dev,
- struct iio_dev *indio_dev,
- irqreturn_t (*pollfunc_bh)(int irq, void *p),
- irqreturn_t (*pollfunc_th)(int irq, void *p),
- int irq,
- unsigned long flags,
- const struct iio_buffer_setup_ops *setup_ops)
+ struct iio_dev *indio_dev,
+ irqreturn_t (*pollfunc_bh)(int irq, void *p),
+ irqreturn_t (*pollfunc_th)(int irq, void *p),
+ int irq, unsigned long flags,
+ const struct iio_buffer_setup_ops *setup_ops)
{
int ret;
@@ -394,7 +383,7 @@ static int tiadc_iio_buffered_hardware_setup(struct device *dev,
return ret;
return devm_request_threaded_irq(dev, irq, pollfunc_th, pollfunc_bh,
- flags, indio_dev->name, indio_dev);
+ flags, indio_dev->name, indio_dev);
}
static const char * const chan_name_ain[] = {
@@ -419,16 +408,16 @@ static int tiadc_channel_init(struct device *dev, struct iio_dev *indio_dev,
indio_dev->num_channels = channels;
chan_array = devm_kcalloc(dev, channels, sizeof(*chan_array),
GFP_KERNEL);
- if (chan_array == NULL)
+ if (!chan_array)
return -ENOMEM;
chan = chan_array;
for (i = 0; i < channels; i++, chan++) {
-
chan->type = IIO_VOLTAGE;
chan->indexed = 1;
chan->channel = adc_dev->channel_line[i];
chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+ chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE);
chan->datasheet_name = chan_name_ain[chan->channel];
chan->scan_index = i;
chan->scan_type.sign = 'u';
@@ -442,16 +431,33 @@ static int tiadc_channel_init(struct device *dev, struct iio_dev *indio_dev,
}
static int tiadc_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long mask)
+ struct iio_chan_spec const *chan, int *val, int *val2,
+ long mask)
{
struct tiadc_device *adc_dev = iio_priv(indio_dev);
- int ret = IIO_VAL_INT;
int i, map_val;
unsigned int fifo1count, read, stepid;
bool found = false;
u32 step_en;
unsigned long timeout;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_VOLTAGE:
+ *val = 1800;
+ *val2 = chan->scan_type.realbits;
+ return IIO_VAL_FRACTIONAL_LOG2;
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
if (iio_buffer_enabled(indio_dev))
return -EBUSY;
@@ -461,15 +467,19 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
return -EINVAL;
mutex_lock(&adc_dev->fifo1_lock);
+
+ ret = tiadc_wait_idle(adc_dev);
+ if (ret)
+ goto err_unlock;
+
fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
while (fifo1count--)
tiadc_readl(adc_dev, REG_FIFO1);
am335x_tsc_se_set_once(adc_dev->mfd_tscadc, step_en);
- timeout = jiffies + msecs_to_jiffies
- (IDLE_TIMEOUT * adc_dev->channels);
/* Wait for Fifo threshold interrupt */
+ timeout = jiffies + msecs_to_jiffies(IDLE_TIMEOUT_MS * adc_dev->channels);
while (1) {
fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
if (fifo1count)
@@ -481,6 +491,7 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
goto err_unlock;
}
}
+
map_val = adc_dev->channel_step[chan->scan_index];
/*
@@ -498,17 +509,18 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
if (stepid == map_val) {
read = read & FIFOREAD_DATA_MASK;
found = true;
- *val = (u16) read;
+ *val = (u16)read;
}
}
+
am335x_tsc_se_adc_done(adc_dev->mfd_tscadc);
if (!found)
- ret = -EBUSY;
+ ret = -EBUSY;
err_unlock:
mutex_unlock(&adc_dev->fifo1_lock);
- return ret;
+ return ret ? ret : IIO_VAL_INT;
}
static const struct iio_info tiadc_info = {
@@ -545,6 +557,7 @@ static int tiadc_request_dma(struct platform_device *pdev,
goto err;
return 0;
+
err:
dma_release_channel(dma->chan);
return -ENOMEM;
@@ -558,6 +571,7 @@ static int tiadc_parse_dt(struct platform_device *pdev,
const __be32 *cur;
int channels = 0;
u32 val;
+ int i;
of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) {
adc_dev->channel_line[channels] = val;
@@ -570,6 +584,8 @@ static int tiadc_parse_dt(struct platform_device *pdev,
channels++;
}
+ adc_dev->channels = channels;
+
of_property_read_u32_array(node, "ti,chan-step-avg",
adc_dev->step_avg, channels);
of_property_read_u32_array(node, "ti,chan-step-opendelay",
@@ -577,7 +593,33 @@ static int tiadc_parse_dt(struct platform_device *pdev,
of_property_read_u32_array(node, "ti,chan-step-sampledelay",
adc_dev->sample_delay, channels);
- adc_dev->channels = channels;
+ for (i = 0; i < adc_dev->channels; i++) {
+ int chan;
+
+ chan = adc_dev->channel_line[i];
+
+ if (adc_dev->step_avg[i] > STEPCONFIG_AVG_16) {
+ dev_warn(&pdev->dev,
+ "chan %d: wrong step avg, truncated to %ld\n",
+ chan, STEPCONFIG_AVG_16);
+ adc_dev->step_avg[i] = STEPCONFIG_AVG_16;
+ }
+
+ if (adc_dev->open_delay[i] > STEPCONFIG_MAX_OPENDLY) {
+ dev_warn(&pdev->dev,
+ "chan %d: wrong open delay, truncated to 0x%lX\n",
+ chan, STEPCONFIG_MAX_OPENDLY);
+ adc_dev->open_delay[i] = STEPCONFIG_MAX_OPENDLY;
+ }
+
+ if (adc_dev->sample_delay[i] > STEPCONFIG_MAX_SAMPLE) {
+ dev_warn(&pdev->dev,
+ "chan %d: wrong sample delay, truncated to 0x%lX\n",
+ chan, STEPCONFIG_MAX_SAMPLE);
+ adc_dev->sample_delay[i] = STEPCONFIG_MAX_SAMPLE;
+ }
+ }
+
return 0;
}
@@ -594,7 +636,7 @@ static int tiadc_probe(struct platform_device *pdev)
}
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc_dev));
- if (indio_dev == NULL) {
+ if (!indio_dev) {
dev_err(&pdev->dev, "failed to allocate iio device\n");
return -ENOMEM;
}
@@ -616,18 +658,17 @@ static int tiadc_probe(struct platform_device *pdev)
return err;
err = tiadc_iio_buffered_hardware_setup(&pdev->dev, indio_dev,
- &tiadc_worker_h,
- &tiadc_irq_h,
- adc_dev->mfd_tscadc->irq,
- IRQF_SHARED,
- &tiadc_buffer_setup_ops);
-
+ &tiadc_worker_h,
+ &tiadc_irq_h,
+ adc_dev->mfd_tscadc->irq,
+ IRQF_SHARED,
+ &tiadc_buffer_setup_ops);
if (err)
- goto err_free_channels;
+ return err;
err = iio_device_register(indio_dev);
if (err)
- goto err_buffer_unregister;
+ return err;
platform_set_drvdata(pdev, indio_dev);
@@ -639,8 +680,7 @@ static int tiadc_probe(struct platform_device *pdev)
err_dma:
iio_device_unregister(indio_dev);
-err_buffer_unregister:
-err_free_channels:
+
return err;
}
@@ -671,9 +711,8 @@ static int __maybe_unused tiadc_suspend(struct device *dev)
unsigned int idle;
idle = tiadc_readl(adc_dev, REG_CTRL);
- idle &= ~(CNTRLREG_TSCSSENB);
- tiadc_writel(adc_dev, REG_CTRL, (idle |
- CNTRLREG_POWERDOWN));
+ idle &= ~(CNTRLREG_SSENB);
+ tiadc_writel(adc_dev, REG_CTRL, idle | CNTRLREG_POWERDOWN);
return 0;
}
@@ -686,12 +725,12 @@ static int __maybe_unused tiadc_resume(struct device *dev)
/* Make sure ADC is powered up */
restore = tiadc_readl(adc_dev, REG_CTRL);
- restore &= ~(CNTRLREG_POWERDOWN);
+ restore &= ~CNTRLREG_POWERDOWN;
tiadc_writel(adc_dev, REG_CTRL, restore);
tiadc_step_config(indio_dev);
am335x_tsc_se_set_cache(adc_dev->mfd_tscadc,
- adc_dev->buffer_en_ch_steps);
+ adc_dev->buffer_en_ch_steps);
return 0;
}
@@ -699,6 +738,7 @@ static SIMPLE_DEV_PM_OPS(tiadc_pm_ops, tiadc_suspend, tiadc_resume);
static const struct of_device_id ti_adc_dt_ids[] = {
{ .compatible = "ti,am3359-adc", },
+ { .compatible = "ti,am4372-adc", },
{ }
};
MODULE_DEVICE_TABLE(of, ti_adc_dt_ids);
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index 55adc379f94b..740cae00dac2 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* TI Touch Screen / ADC MFD driver
*
* Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/module.h>
@@ -113,70 +105,99 @@ static void tscadc_idle_config(struct ti_tscadc_dev *tscadc)
{
unsigned int idleconfig;
- idleconfig = STEPCONFIG_YNN | STEPCONFIG_INM_ADCREFM |
- STEPCONFIG_INP_ADCREFM | STEPCONFIG_YPN;
+ idleconfig = STEPCONFIG_INM_ADCREFM | STEPCONFIG_INP_ADCREFM;
+ if (ti_adc_with_touchscreen(tscadc))
+ idleconfig |= STEPCONFIG_YNN | STEPCONFIG_YPN;
regmap_write(tscadc->regmap, REG_IDLECONFIG, idleconfig);
}
static int ti_tscadc_probe(struct platform_device *pdev)
{
- struct ti_tscadc_dev *tscadc;
- struct resource *res;
- struct clk *clk;
- struct device_node *node;
- struct mfd_cell *cell;
- struct property *prop;
- const __be32 *cur;
- u32 val;
- int err, ctrl;
- int clock_rate;
- int tsc_wires = 0, adc_channels = 0, total_channels;
- int readouts = 0;
+ struct ti_tscadc_dev *tscadc;
+ struct resource *res;
+ struct clk *clk;
+ struct device_node *node;
+ struct mfd_cell *cell;
+ struct property *prop;
+ const __be32 *cur;
+ bool use_tsc = false, use_mag = false;
+ u32 val;
+ int err;
+ int tscmag_wires = 0, adc_channels = 0, cell_idx = 0, total_channels;
+ int readouts = 0, mag_tracks = 0;
+
+ /* Allocate memory for device */
+ tscadc = devm_kzalloc(&pdev->dev, sizeof(*tscadc), GFP_KERNEL);
+ if (!tscadc)
+ return -ENOMEM;
+
+ tscadc->dev = &pdev->dev;
if (!pdev->dev.of_node) {
dev_err(&pdev->dev, "Could not find valid DT data.\n");
return -EINVAL;
}
- node = of_get_child_by_name(pdev->dev.of_node, "tsc");
- of_property_read_u32(node, "ti,wires", &tsc_wires);
- of_property_read_u32(node, "ti,coordiante-readouts", &readouts);
+ tscadc->data = of_device_get_match_data(&pdev->dev);
+
+ if (ti_adc_with_touchscreen(tscadc)) {
+ node = of_get_child_by_name(pdev->dev.of_node, "tsc");
+ of_property_read_u32(node, "ti,wires", &tscmag_wires);
+ err = of_property_read_u32(node, "ti,coordinate-readouts",
+ &readouts);
+ if (err < 0)
+ of_property_read_u32(node, "ti,coordiante-readouts",
+ &readouts);
+
+ of_node_put(node);
+
+ if (tscmag_wires)
+ use_tsc = true;
+ } else {
+ /*
+ * When adding support for the magnetic stripe reader, here is
+ * the place to look for the number of tracks used from device
+ * tree. Let's default to 0 for now.
+ */
+ mag_tracks = 0;
+ tscmag_wires = mag_tracks * 2;
+ if (tscmag_wires)
+ use_mag = true;
+ }
node = of_get_child_by_name(pdev->dev.of_node, "adc");
of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) {
adc_channels++;
if (val > 7) {
dev_err(&pdev->dev, " PIN numbers are 0..7 (not %d)\n",
- val);
+ val);
+ of_node_put(node);
return -EINVAL;
}
}
- total_channels = tsc_wires + adc_channels;
+
+ of_node_put(node);
+
+ total_channels = tscmag_wires + adc_channels;
if (total_channels > 8) {
dev_err(&pdev->dev, "Number of i/p channels more than 8\n");
return -EINVAL;
}
+
if (total_channels == 0) {
dev_err(&pdev->dev, "Need atleast one channel.\n");
return -EINVAL;
}
- if (readouts * 2 + 2 + adc_channels > 16) {
+ if (use_tsc && (readouts * 2 + 2 + adc_channels > 16)) {
dev_err(&pdev->dev, "Too many step configurations requested\n");
return -EINVAL;
}
- /* Allocate memory for device */
- tscadc = devm_kzalloc(&pdev->dev, sizeof(*tscadc), GFP_KERNEL);
- if (!tscadc)
- return -ENOMEM;
-
- tscadc->dev = &pdev->dev;
-
err = platform_get_irq(pdev, 0);
if (err < 0)
- goto ret;
+ return err;
else
tscadc->irq = err;
@@ -187,11 +208,11 @@ static int ti_tscadc_probe(struct platform_device *pdev)
tscadc->tscadc_phys_base = res->start;
tscadc->regmap = devm_regmap_init_mmio(&pdev->dev,
- tscadc->tscadc_base, &tscadc_regmap_config);
+ tscadc->tscadc_base,
+ &tscadc_regmap_config);
if (IS_ERR(tscadc->regmap)) {
dev_err(&pdev->dev, "regmap init failed\n");
- err = PTR_ERR(tscadc->regmap);
- goto ret;
+ return PTR_ERR(tscadc->regmap);
}
spin_lock_init(&tscadc->reg_lock);
@@ -201,71 +222,70 @@ static int ti_tscadc_probe(struct platform_device *pdev)
pm_runtime_get_sync(&pdev->dev);
/*
- * The TSC_ADC_Subsystem has 2 clock domains
- * OCP_CLK and ADC_CLK.
- * The ADC clock is expected to run at target of 3MHz,
- * and expected to capture 12-bit data at a rate of 200 KSPS.
- * The TSC_ADC_SS controller design assumes the OCP clock is
- * at least 6x faster than the ADC clock.
+ * The TSC_ADC_Subsystem has 2 clock domains: OCP_CLK and ADC_CLK.
+ * ADCs produce a 12-bit sample every 15 ADC_CLK cycles.
+ * am33xx ADCs expect to capture 200ksps.
+ * am47xx ADCs expect to capture 867ksps.
+ * We need ADC clocks respectively running at 3MHz and 13MHz.
+ * These frequencies are valid since TSC_ADC_SS controller design
+ * assumes the OCP clock is at least 6x faster than the ADC clock.
*/
- clk = devm_clk_get(&pdev->dev, "adc_tsc_fck");
+ clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
- dev_err(&pdev->dev, "failed to get TSC fck\n");
+ dev_err(&pdev->dev, "failed to get fck\n");
err = PTR_ERR(clk);
goto err_disable_clk;
}
- clock_rate = clk_get_rate(clk);
- tscadc->clk_div = clock_rate / ADC_CLK;
- /* TSCADC_CLKDIV needs to be configured to the value minus 1 */
- tscadc->clk_div--;
+ tscadc->clk_div = (clk_get_rate(clk) / tscadc->data->target_clk_rate) - 1;
regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div);
- /* Set the control register bits */
- ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID;
- regmap_write(tscadc->regmap, REG_CTRL, ctrl);
-
- /* Set register bits for Idle Config Mode */
- if (tsc_wires > 0) {
- tscadc->tsc_wires = tsc_wires;
- if (tsc_wires == 5)
- ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB;
- else
- ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB;
- tscadc_idle_config(tscadc);
+ /*
+ * Set the control register bits. tscadc->ctrl stores the configuration
+ * of the CTRL register but not the subsystem enable bit which must be
+ * added manually when timely.
+ */
+ tscadc->ctrl = CNTRLREG_STEPID;
+ if (ti_adc_with_touchscreen(tscadc)) {
+ tscadc->ctrl |= CNTRLREG_TSC_STEPCONFIGWRT;
+ if (use_tsc) {
+ tscadc->ctrl |= CNTRLREG_TSC_ENB;
+ if (tscmag_wires == 5)
+ tscadc->ctrl |= CNTRLREG_TSC_5WIRE;
+ else
+ tscadc->ctrl |= CNTRLREG_TSC_4WIRE;
+ }
+ } else {
+ tscadc->ctrl |= CNTRLREG_MAG_PREAMP_PWRDOWN |
+ CNTRLREG_MAG_PREAMP_BYPASS;
}
+ regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl);
+
+ tscadc_idle_config(tscadc);
/* Enable the TSC module enable bit */
- ctrl |= CNTRLREG_TSCSSENB;
- regmap_write(tscadc->regmap, REG_CTRL, ctrl);
-
- tscadc->used_cells = 0;
- tscadc->tsc_cell = -1;
- tscadc->adc_cell = -1;
-
- /* TSC Cell */
- if (tsc_wires > 0) {
- tscadc->tsc_cell = tscadc->used_cells;
- cell = &tscadc->cells[tscadc->used_cells++];
- cell->name = "TI-am335x-tsc";
- cell->of_compatible = "ti,am3359-tsc";
+ regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl | CNTRLREG_SSENB);
+
+ /* TSC or MAG Cell */
+ if (use_tsc || use_mag) {
+ cell = &tscadc->cells[cell_idx++];
+ cell->name = tscadc->data->secondary_feature_name;
+ cell->of_compatible = tscadc->data->secondary_feature_compatible;
cell->platform_data = &tscadc;
cell->pdata_size = sizeof(tscadc);
}
/* ADC Cell */
if (adc_channels > 0) {
- tscadc->adc_cell = tscadc->used_cells;
- cell = &tscadc->cells[tscadc->used_cells++];
- cell->name = "TI-am335x-adc";
- cell->of_compatible = "ti,am3359-adc";
+ cell = &tscadc->cells[cell_idx++];
+ cell->name = tscadc->data->adc_feature_name;
+ cell->of_compatible = tscadc->data->adc_feature_compatible;
cell->platform_data = &tscadc;
cell->pdata_size = sizeof(tscadc);
}
err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
- tscadc->cells, tscadc->used_cells, NULL,
- 0, NULL);
+ tscadc->cells, cell_idx, NULL, 0, NULL);
if (err < 0)
goto err_disable_clk;
@@ -275,13 +295,13 @@ static int ti_tscadc_probe(struct platform_device *pdev)
err_disable_clk:
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
-ret:
+
return err;
}
static int ti_tscadc_remove(struct platform_device *pdev)
{
- struct ti_tscadc_dev *tscadc = platform_get_drvdata(pdev);
+ struct ti_tscadc_dev *tscadc = platform_get_drvdata(pdev);
regmap_write(tscadc->regmap, REG_SE, 0x00);
@@ -300,7 +320,7 @@ static int __maybe_unused ti_tscadc_can_wakeup(struct device *dev, void *data)
static int __maybe_unused tscadc_suspend(struct device *dev)
{
- struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev);
+ struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev);
regmap_write(tscadc->regmap, REG_SE, 0x00);
if (device_for_each_child(dev, NULL, ti_tscadc_can_wakeup)) {
@@ -308,7 +328,7 @@ static int __maybe_unused tscadc_suspend(struct device *dev)
regmap_read(tscadc->regmap, REG_CTRL, &ctrl);
ctrl &= ~(CNTRLREG_POWERDOWN);
- ctrl |= CNTRLREG_TSCSSENB;
+ ctrl |= CNTRLREG_SSENB;
regmap_write(tscadc->regmap, REG_CTRL, ctrl);
}
pm_runtime_put_sync(dev);
@@ -318,34 +338,39 @@ static int __maybe_unused tscadc_suspend(struct device *dev)
static int __maybe_unused tscadc_resume(struct device *dev)
{
- struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev);
- u32 ctrl;
+ struct ti_tscadc_dev *tscadc = dev_get_drvdata(dev);
pm_runtime_get_sync(dev);
- /* context restore */
- ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID;
- regmap_write(tscadc->regmap, REG_CTRL, ctrl);
-
- if (tscadc->tsc_cell != -1) {
- if (tscadc->tsc_wires == 5)
- ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB;
- else
- ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB;
- tscadc_idle_config(tscadc);
- }
- ctrl |= CNTRLREG_TSCSSENB;
- regmap_write(tscadc->regmap, REG_CTRL, ctrl);
-
regmap_write(tscadc->regmap, REG_CLKDIV, tscadc->clk_div);
+ regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl);
+ tscadc_idle_config(tscadc);
+ regmap_write(tscadc->regmap, REG_CTRL, tscadc->ctrl | CNTRLREG_SSENB);
return 0;
}
static SIMPLE_DEV_PM_OPS(tscadc_pm_ops, tscadc_suspend, tscadc_resume);
+static const struct ti_tscadc_data tscdata = {
+ .adc_feature_name = "TI-am335x-adc",
+ .adc_feature_compatible = "ti,am3359-adc",
+ .secondary_feature_name = "TI-am335x-tsc",
+ .secondary_feature_compatible = "ti,am3359-tsc",
+ .target_clk_rate = TSC_ADC_CLK,
+};
+
+static const struct ti_tscadc_data magdata = {
+ .adc_feature_name = "TI-am43xx-adc",
+ .adc_feature_compatible = "ti,am4372-adc",
+ .secondary_feature_name = "TI-am43xx-mag",
+ .secondary_feature_compatible = "ti,am4372-mag",
+ .target_clk_rate = MAG_ADC_CLK,
+};
+
static const struct of_device_id ti_tscadc_dt_ids[] = {
- { .compatible = "ti,am3359-tscadc", },
+ { .compatible = "ti,am3359-tscadc", .data = &tscdata },
+ { .compatible = "ti,am4372-magadc", .data = &magdata },
{ }
};
MODULE_DEVICE_TABLE(of, ti_tscadc_dt_ids);
@@ -363,6 +388,6 @@ static struct platform_driver ti_tscadc_driver = {
module_platform_driver(ti_tscadc_driver);
-MODULE_DESCRIPTION("TI touchscreen / ADC MFD controller driver");
+MODULE_DESCRIPTION("TI touchscreen/magnetic stripe reader/ADC MFD controller driver");
MODULE_AUTHOR("Rachna Patil <rachna@ti.com>");
MODULE_LICENSE("GPL");
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 7c111bbdc2af..35269f998210 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -850,18 +850,15 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
/* DS4 GPIO */
gpio_direction_output(pdata->buck_ds[2], 0x0);
- if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
- pdata->buck4_gpiodvs) {
- regmap_update_bits(s5m8767->iodev->regmap_pmic,
- S5M8767_REG_BUCK2CTRL, 1 << 1,
- (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
- regmap_update_bits(s5m8767->iodev->regmap_pmic,
- S5M8767_REG_BUCK3CTRL, 1 << 1,
- (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
- regmap_update_bits(s5m8767->iodev->regmap_pmic,
- S5M8767_REG_BUCK4CTRL, 1 << 1,
- (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
- }
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK2CTRL, 1 << 1,
+ (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK3CTRL, 1 << 1,
+ (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
+ regmap_update_bits(s5m8767->iodev->regmap_pmic,
+ S5M8767_REG_BUCK4CTRL, 1 << 1,
+ (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
/* Initialize GPIO DVS registers */
for (i = 0; i < 8; i++) {
generated by cgit (git 2.34.1) at 2024-06-16 12:43:51 +0000