/* Enable/Disable IHF ext amplifier */
int spk_amp_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
if (mc_dev_ctx->spk_pin <= 0)
return 0;
switch (event) {
case SND_SOC_DAPM_POST_PMU:
xgold_debug("%s: SND_SOC_DAPM_PRE_PMU\n", __func__);
if (mc_dev_ctx->spk_pin > 0)
gpiod_set_value(gpio_to_desc(mc_dev_ctx->spk_pin), 1);
break;
case SND_SOC_DAPM_PRE_PMD:
xgold_debug("%s: SND_SOC_DAPM_PRE_PMD\n", __func__);
if (mc_dev_ctx->spk_pin > 0)
gpiod_set_value(gpio_to_desc(mc_dev_ctx->spk_pin), 0);
break;
default:
break;
}
return 0;
}
/*
* Enables given plates and measures touch parameters using ADC
*/
static int adc_ts_measure(struct iio_channel *channel,
struct gpio_desc *plate_p, struct gpio_desc *plate_m)
{
int i, value = 0, val = 0;
int error;
gpiod_set_value(plate_p, 1);
gpiod_set_value(plate_m, 1);
usleep_range(COLI_TOUCH_MIN_DELAY_US, COLI_TOUCH_MAX_DELAY_US);
for (i = 0; i < COLI_TOUCH_NO_OF_AVGS; i++) {
error = iio_read_channel_raw(channel, &val);
if (error < 0) {
value = error;
goto error_iio_read;
}
value += val;
}
value /= COLI_TOUCH_NO_OF_AVGS;
error_iio_read:
gpiod_set_value(plate_p, 0);
gpiod_set_value(plate_m, 0);
return value;
}
static int
__adp1653_set_power(struct adp1653_flash *flash, int on)
{
int ret;
if (flash->platform_data->power) {
ret = flash->platform_data->power(&flash->subdev, on);
if (ret < 0)
return ret;
} else {
gpiod_set_value(flash->platform_data->enable_gpio, on);
if (on)
/* Some delay is apparently required. */
udelay(20);
}
if (!on)
return 0;
ret = adp1653_init_device(flash);
if (ret >= 0)
return ret;
if (flash->platform_data->power)
flash->platform_data->power(&flash->subdev, 0);
else
gpiod_set_value(flash->platform_data->enable_gpio, 0);
return ret;
}
static void __mmc_pwrseq_emmc_reset(struct mmc_pwrseq_emmc *pwrseq)
{
gpiod_set_value(pwrseq->reset_gpio, 1);
udelay(1);
gpiod_set_value(pwrseq->reset_gpio, 0);
udelay(200);
}
static void at803x_link_change_notify(struct phy_device *phydev)
{
struct at803x_priv *priv = phydev->priv;
/*
* Conduct a hardware reset for AT8030 every time a link loss is
* signalled. This is necessary to circumvent a hardware bug that
* occurs when the cable is unplugged while TX packets are pending
* in the FIFO. In such cases, the FIFO enters an error mode it
* cannot recover from by software.
*/
if (phydev->drv->phy_id == ATH8030_PHY_ID) {
if (phydev->state == PHY_NOLINK) {
if (priv->gpiod_reset && !priv->phy_reset) {
struct at803x_context context;
at803x_context_save(phydev, &context);
gpiod_set_value(priv->gpiod_reset, 0);
msleep(1);
gpiod_set_value(priv->gpiod_reset, 1);
msleep(1);
at803x_context_restore(phydev, &context);
dev_dbg(&phydev->dev, "%s(): phy was reset\n",
__func__);
priv->phy_reset = true;
}
} else {
priv->phy_reset = false;
}
}
}
/**
* sta350_set_bias_level - DAPM callback
* @codec: the codec device
* @level: DAPM power level
*
* This is called by ALSA to put the codec into low power mode
* or to wake it up. If the codec is powered off completely
* all registers must be restored after power on.
*/
static int sta350_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct sta350_priv *sta350 = snd_soc_codec_get_drvdata(codec);
int ret;
dev_dbg(codec->dev, "level = %d\n", level);
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
/* Full power on */
regmap_update_bits(sta350->regmap, STA350_CONFF,
STA350_CONFF_PWDN | STA350_CONFF_EAPD,
STA350_CONFF_PWDN | STA350_CONFF_EAPD);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(
ARRAY_SIZE(sta350->supplies),
sta350->supplies);
if (ret < 0) {
dev_err(codec->dev,
"Failed to enable supplies: %d\n",
ret);
return ret;
}
sta350_startup_sequence(sta350);
sta350_cache_sync(codec);
}
/* Power down */
regmap_update_bits(sta350->regmap, STA350_CONFF,
STA350_CONFF_PWDN | STA350_CONFF_EAPD,
0);
break;
case SND_SOC_BIAS_OFF:
/* The chip runs through the power down sequence for us */
regmap_update_bits(sta350->regmap, STA350_CONFF,
STA350_CONFF_PWDN | STA350_CONFF_EAPD, 0);
/* power down: low */
if (sta350->gpiod_power_down)
gpiod_set_value(sta350->gpiod_power_down, 0);
if (sta350->gpiod_nreset)
gpiod_set_value(sta350->gpiod_nreset, 0);
regulator_bulk_disable(ARRAY_SIZE(sta350->supplies),
sta350->supplies);
break;
}
codec->dapm.bias_level = level;
return 0;
}
static void nop_reset(struct usb_phy_generic *nop)
{
if (!nop->gpiod_reset)
return;
gpiod_set_value(nop->gpiod_reset, 1);
usleep_range(10000, 20000);
gpiod_set_value(nop->gpiod_reset, 0);
}
static int sta32x_startup_sequence(struct sta32x_priv *sta32x)
{
if (sta32x->gpiod_nreset) {
gpiod_set_value(sta32x->gpiod_nreset, 0);
mdelay(1);
gpiod_set_value(sta32x->gpiod_nreset, 1);
mdelay(1);
}
return 0;
}
static void sis_ts_reset(struct sis_ts_data *ts)
{
if (ts->reset_gpio) {
/* Get out of reset */
usleep_range(1000, 2000);
gpiod_set_value(ts->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value(ts->reset_gpio, 0);
msleep(100);
}
}
static void send_bits(struct pimhyp3_ts_data *ts, uint16_t data, uint16_t count)
{
int x;
int mask = 1 << (count-1);
for(x = 0; x < count; x++){
gpiod_set_value(ts->gpiod_mosi,(data & mask) > 0);
data <<= 1;
gpiod_set_value(ts->gpiod_int, 0);
udelay(uDELAY);
gpiod_set_value(ts->gpiod_int, 1);
udelay(uDELAY);
}
gpiod_set_value(ts->gpiod_mosi,0);
}
static int sta350_startup_sequence(struct sta350_priv *sta350)
{
if (sta350->gpiod_power_down)
gpiod_set_value(sta350->gpiod_power_down, 1);
if (sta350->gpiod_nreset) {
gpiod_set_value(sta350->gpiod_nreset, 0);
mdelay(1);
gpiod_set_value(sta350->gpiod_nreset, 1);
mdelay(1);
}
return 0;
}
static void edp_ctrl_phy_aux_enable(struct edp_ctrl *ctrl, int enable)
{
if (enable) {
edp_regulator_enable(ctrl);
edp_clk_enable(ctrl, EDP_CLK_MASK_AUX_CHAN);
msm_edp_phy_ctrl(ctrl->phy, 1);
msm_edp_aux_ctrl(ctrl->aux, 1);
gpiod_set_value(ctrl->panel_en_gpio, 1);
} else {
gpiod_set_value(ctrl->panel_en_gpio, 0);
msm_edp_aux_ctrl(ctrl->aux, 0);
msm_edp_phy_ctrl(ctrl->phy, 0);
edp_clk_disable(ctrl, EDP_CLK_MASK_AUX_CHAN);
edp_regulator_disable(ctrl);
}
}
static int st_nci_spi_enable(void *phy_id)
{
struct st_nci_spi_phy *phy = phy_id;
gpiod_set_value(phy->gpiod_reset, 0);
usleep_range(10000, 15000);
gpiod_set_value(phy->gpiod_reset, 1);
usleep_range(80000, 85000);
if (phy->ndlc->powered == 0 && phy->irq_active == 0) {
enable_irq(phy->spi_dev->irq);
phy->irq_active = true;
}
return 0;
}
/*
* Requires arche_pdata->platform_state_mutex to be held
*/
static int
arche_platform_coldboot_seq(struct arche_platform_drvdata *arche_pdata)
{
int ret;
if (arche_pdata->state == ARCHE_PLATFORM_STATE_ACTIVE)
return 0;
dev_info(arche_pdata->dev, "Booting from cold boot state\n");
svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
gpiod_set_value(arche_pdata->svc_sysboot, 0);
usleep_range(100, 200);
ret = clk_prepare_enable(arche_pdata->svc_ref_clk);
if (ret) {
dev_err(arche_pdata->dev, "failed to enable svc_ref_clk: %d\n",
ret);
return ret;
}
/* bring SVC out of reset */
svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi);
arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_ACTIVE);
return 0;
}
/*
* Requires arche_pdata->platform_state_mutex to be held
*/
static int
arche_platform_fw_flashing_seq(struct arche_platform_drvdata *arche_pdata)
{
int ret;
if (arche_pdata->state == ARCHE_PLATFORM_STATE_FW_FLASHING)
return 0;
dev_info(arche_pdata->dev, "Switching to FW flashing state\n");
svc_reset_onoff(arche_pdata->svc_reset, arche_pdata->is_reset_act_hi);
gpiod_set_value(arche_pdata->svc_sysboot, 1);
usleep_range(100, 200);
ret = clk_prepare_enable(arche_pdata->svc_ref_clk);
if (ret) {
dev_err(arche_pdata->dev, "failed to enable svc_ref_clk: %d\n",
ret);
return ret;
}
svc_reset_onoff(arche_pdata->svc_reset, !arche_pdata->is_reset_act_hi);
arche_platform_set_state(arche_pdata, ARCHE_PLATFORM_STATE_FW_FLASHING);
return 0;
}
static int write_vmem(struct fbtft_par *par, size_t offset, size_t len)
{
u16 *vmem16 = (u16 *)par->info->screen_buffer;
u8 *buf = par->txbuf.buf;
int x, y, i;
int ret;
for (x = 0; x < par->info->var.xres; x++) {
for (y = 0; y < par->info->var.yres / 8; y++) {
*buf = 0x00;
for (i = 0; i < 8; i++)
*buf |= (vmem16[(y * 8 + i) *
par->info->var.xres + x] ?
1 : 0) << i;
buf++;
}
}
/* Write data */
gpiod_set_value(par->gpio.dc, 1);
ret = par->fbtftops.write(par, par->txbuf.buf,
par->info->var.xres * par->info->var.yres /
8);
if (ret < 0)
dev_err(par->info->device, "write failed and returned: %d\n",
ret);
return ret;
}
static int clk_gpio_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_gpio *clk = to_clk_gpio(hw);
gpiod_set_value(clk->gpiod, index);
return 0;
}
static int clk_gpio_gate_enable(struct clk_hw *hw)
{
struct clk_gpio *clk = to_clk_gpio(hw);
gpiod_set_value(clk->gpiod, 1);
return 0;
}
static int s6e8aa0_power_on(struct s6e8aa0 *ctx)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
msleep(ctx->power_on_delay);
gpiod_set_value(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
gpiod_set_value(ctx->reset_gpio, 1);
msleep(ctx->reset_delay);
return 0;
}
static void bcma_hci_platform_power_gpio(struct bcma_device *dev, bool val)
{
struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
if (IS_ERR_OR_NULL(usb_dev->gpio_desc))
return;
gpiod_set_value(usb_dev->gpio_desc, val);
}
/**
* sta32x_set_bias_level - DAPM callback
* @codec: the codec device
* @level: DAPM power level
*
* This is called by ALSA to put the codec into low power mode
* or to wake it up. If the codec is powered off completely
* all registers must be restored after power on.
*/
static int sta32x_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
int ret;
struct sta32x_priv *sta32x = snd_soc_codec_get_drvdata(codec);
dev_dbg(codec->dev, "level = %d\n", level);
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
/* Full power on */
regmap_update_bits(sta32x->regmap, STA32X_CONFF,
STA32X_CONFF_PWDN | STA32X_CONFF_EAPD,
STA32X_CONFF_PWDN | STA32X_CONFF_EAPD);
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(sta32x->supplies),
sta32x->supplies);
if (ret != 0) {
dev_err(codec->dev,
"Failed to enable supplies: %d\n", ret);
return ret;
}
sta32x_startup_sequence(sta32x);
sta32x_cache_sync(codec);
sta32x_watchdog_start(sta32x);
}
/* Power down */
regmap_update_bits(sta32x->regmap, STA32X_CONFF,
STA32X_CONFF_PWDN | STA32X_CONFF_EAPD,
0);
break;
case SND_SOC_BIAS_OFF:
/* The chip runs through the power down sequence for us. */
regmap_update_bits(sta32x->regmap, STA32X_CONFF,
STA32X_CONFF_PWDN | STA32X_CONFF_EAPD, 0);
msleep(300);
sta32x_watchdog_stop(sta32x);
if (sta32x->gpiod_nreset)
gpiod_set_value(sta32x->gpiod_nreset, 0);
regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies),
sta32x->supplies);
break;
}
return 0;
}
static int hx711_reset(struct hx711_data *hx711_data)
{
int ret;
int val = gpiod_get_value(hx711_data->gpiod_dout);
if (val) {
/*
* an examination with the oszilloscope indicated
* that the first value read after the reset is not stable
* if we reset too short;
* the shorter the reset cycle
* the less reliable the first value after reset is;
* there were no problems encountered with a value
* of 10 ms or higher
*/
gpiod_set_value(hx711_data->gpiod_pd_sck, 1);
msleep(10);
gpiod_set_value(hx711_data->gpiod_pd_sck, 0);
ret = hx711_wait_for_ready(hx711_data);
if (ret)
return ret;
/*
* after a reset the gain is 128 so we do a dummy read
* to set the gain for the next read
*/
ret = hx711_read(hx711_data);
if (ret < 0)
return ret;
/*
* after a dummy read we need to wait vor readiness
* for not mixing gain pulses with the clock
*/
ret = hx711_wait_for_ready(hx711_data);
if (ret)
return ret;
}
return val;
}
static int s6e3ha2_power_on(struct s6e3ha2 *ctx)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
msleep(120);
gpiod_set_value(ctx->enable_gpio, 0);
usleep_range(5000, 6000);
gpiod_set_value(ctx->enable_gpio, 1);
gpiod_set_value(ctx->reset_gpio, 1);
usleep_range(5000, 6000);
gpiod_set_value(ctx->reset_gpio, 0);
usleep_range(5000, 6000);
return 0;
}
static int nokia_close(struct hci_uart *hu)
{
struct nokia_bt_dev *btdev = hu->priv;
struct device *dev = &btdev->serdev->dev;
dev_dbg(dev, "close device");
btdev->initialized = false;
skb_queue_purge(&btdev->txq);
kfree_skb(btdev->rx_skb);
/* disable module */
gpiod_set_value(btdev->reset, 1);
gpiod_set_value(btdev->wakeup_bt, 0);
pm_runtime_disable(&btdev->serdev->dev);
serdev_device_close(btdev->serdev);
return 0;
}
/*
* Enable touch detection using falling edge detection on XM
*/
static void vf50_ts_enable_touch_detection(struct vf50_touch_device *vf50_ts)
{
/* Enable plate YM (needs to be strong GND, high active) */
gpiod_set_value(vf50_ts->gpio_ym, 1);
/*
* Let the platform mux to idle state in order to enable
* Pull-Up on GPIO
*/
pinctrl_pm_select_idle_state(&vf50_ts->pdev->dev);
/* Wait for the pull-up to be stable on high */
usleep_range(COLI_PULLUP_MIN_DELAY_US, COLI_PULLUP_MAX_DELAY_US);
}
void usb_gen_phy_shutdown(struct usb_phy *phy)
{
struct usb_phy_generic *nop = dev_get_drvdata(phy->dev);
gpiod_set_value(nop->gpiod_reset, 1);
if (!IS_ERR(nop->clk))
clk_disable_unprepare(nop->clk);
if (!IS_ERR(nop->vcc)) {
if (regulator_disable(nop->vcc))
dev_err(phy->dev, "Failed to disable power\n");
}
}
static int hx711_cycle(struct hx711_data *hx711_data)
{
int val;
/*
* if preempted for more then 60us while PD_SCK is high:
* hx711 is going in reset
* ==> measuring is false
*/
preempt_disable();
gpiod_set_value(hx711_data->gpiod_pd_sck, 1);
val = gpiod_get_value(hx711_data->gpiod_dout);
/*
* here we are not waiting for 0.2 us as suggested by the datasheet,
* because the oscilloscope showed in a test scenario
* at least 1.15 us for PD_SCK high (T3 in datasheet)
* and 0.56 us for PD_SCK low on TI Sitara with 800 MHz
*/
gpiod_set_value(hx711_data->gpiod_pd_sck, 0);
preempt_enable();
return val;
}
static void rx51_ext_control(struct snd_soc_dapm_context *dapm)
{
struct snd_soc_card *card = dapm->card;
struct rx51_audio_pdata *pdata = snd_soc_card_get_drvdata(card);
int hp = 0, hs = 0, tvout = 0;
switch (rx51_jack_func) {
case RX51_JACK_TVOUT:
tvout = 1;
hp = 1;
break;
case RX51_JACK_HS:
hs = 1;
case RX51_JACK_HP:
hp = 1;
break;
}
snd_soc_dapm_mutex_lock(dapm);
if (rx51_spk_func)
snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
else
snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
if (rx51_dmic_func)
snd_soc_dapm_enable_pin_unlocked(dapm, "DMic");
else
snd_soc_dapm_disable_pin_unlocked(dapm, "DMic");
if (hp)
snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
else
snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
if (hs)
snd_soc_dapm_enable_pin_unlocked(dapm, "HS Mic");
else
snd_soc_dapm_disable_pin_unlocked(dapm, "HS Mic");
gpiod_set_value(pdata->tvout_selection_gpio, tvout);
snd_soc_dapm_sync_unlocked(dapm);
snd_soc_dapm_mutex_unlock(dapm);
}
/*
* si4713_powerdown - Powers the device down
* @sdev: si4713_device structure for the device we are communicating
*/
static int si4713_powerdown(struct si4713_device *sdev)
{
int err;
u8 resp[SI4713_PWDN_NRESP];
if (!sdev->power_state)
return 0;
err = si4713_send_command(sdev, SI4713_CMD_POWER_DOWN,
NULL, 0,
resp, ARRAY_SIZE(resp),
DEFAULT_TIMEOUT);
if (!err) {
v4l2_dbg(1, debug, &sdev->sd, "Power down response: 0x%02x\n",
resp[0]);
v4l2_dbg(1, debug, &sdev->sd, "Device in reset mode\n");
if (sdev->gpio_reset)
gpiod_set_value(sdev->gpio_reset, 0);
if (sdev->vdd) {
err = regulator_disable(sdev->vdd);
if (err) {
v4l2_err(&sdev->sd,
"Failed to disable vdd: %d\n", err);
}
}
if (sdev->vio) {
err = regulator_disable(sdev->vio);
if (err) {
v4l2_err(&sdev->sd,
"Failed to disable vio: %d\n", err);
}
}
sdev->power_state = POWER_OFF;
}
return err;
}
static void asc_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
struct asc_port *ascport = to_asc_port(port);
/*
* This routine is used for seting signals of: DTR, DCD, CTS and RTS.
* We use ASC's hardware for CTS/RTS when hardware flow-control is
* enabled, however if the RTS line is required for another purpose,
* commonly controlled using HUP from userspace, then we need to toggle
* it manually, using GPIO.
*
* Some boards also have DTR and DCD implemented using PIO pins, code to
* do this should be hooked in here.
*/
if (!ascport->rts)
return;
/* If HW flow-control is enabled, we can't fiddle with the RTS line */
if (asc_in(port, ASC_CTL) & ASC_CTL_CTSENABLE)
return;
gpiod_set_value(ascport->rts, mctrl & TIOCM_RTS);
}
