OMAPDSS: tpo-td043 panel: handle gpios in panel driver
The tpo-td043mtea1 panel driver leaves gpio configurations to the platform_enable and disable calls in the platform's board file. These should happen in the panel driver itself. Create a platform data struct for the panel, this contains the reset gpio number used by the panel driver, this struct will be passed to the panel driver as platform data. The driver will request and configure the reset gpio rather than leaving it to platform callbacks in board files. This will help in removing the need for the panel drivers to have platform related callbacks. Signed-off-by: Archit Taneja <archit@ti.com>
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@ -18,6 +18,7 @@
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#include <linux/slab.h>
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#include <video/omapdss.h>
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#include <video/omap-panel-data.h>
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#define TPO_R02_MODE(x) ((x) & 7)
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#define TPO_R02_MODE_800x480 7
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@ -278,9 +279,14 @@ static const struct omap_video_timings tpo_td043_timings = {
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.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
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};
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static inline struct panel_tpo_td043_data
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*get_panel_data(const struct omap_dss_device *dssdev)
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{
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return (struct panel_tpo_td043_data *) dssdev->data;
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}
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static int tpo_td043_power_on(struct tpo_td043_device *tpo_td043)
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{
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int nreset_gpio = tpo_td043->nreset_gpio;
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int r;
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if (tpo_td043->powered_on)
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@ -293,8 +299,8 @@ static int tpo_td043_power_on(struct tpo_td043_device *tpo_td043)
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/* wait for panel to stabilize */
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msleep(160);
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if (gpio_is_valid(nreset_gpio))
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gpio_set_value(nreset_gpio, 1);
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if (gpio_is_valid(tpo_td043->nreset_gpio))
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gpio_set_value(tpo_td043->nreset_gpio, 1);
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tpo_td043_write(tpo_td043->spi, 2,
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TPO_R02_MODE(tpo_td043->mode) | TPO_R02_NCLK_RISING);
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@ -311,16 +317,14 @@ static int tpo_td043_power_on(struct tpo_td043_device *tpo_td043)
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static void tpo_td043_power_off(struct tpo_td043_device *tpo_td043)
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{
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int nreset_gpio = tpo_td043->nreset_gpio;
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if (!tpo_td043->powered_on)
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return;
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tpo_td043_write(tpo_td043->spi, 3,
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TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
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if (gpio_is_valid(nreset_gpio))
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gpio_set_value(nreset_gpio, 0);
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if (gpio_is_valid(tpo_td043->nreset_gpio))
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gpio_set_value(tpo_td043->nreset_gpio, 0);
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/* wait for at least 2 vsyncs before cutting off power */
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msleep(50);
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@ -407,7 +411,7 @@ static void tpo_td043_disable(struct omap_dss_device *dssdev)
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static int tpo_td043_probe(struct omap_dss_device *dssdev)
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{
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struct tpo_td043_device *tpo_td043 = g_tpo_td043;
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int nreset_gpio = dssdev->reset_gpio;
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struct panel_tpo_td043_data *pdata = get_panel_data(dssdev);
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int ret = 0;
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dev_dbg(&dssdev->dev, "probe\n");
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@ -417,6 +421,11 @@ static int tpo_td043_probe(struct omap_dss_device *dssdev)
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return -ENODEV;
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}
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if (!pdata)
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return -EINVAL;
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tpo_td043->nreset_gpio = pdata->nreset_gpio;
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dssdev->panel.timings = tpo_td043_timings;
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dssdev->ctrl.pixel_size = 24;
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@ -430,9 +439,10 @@ static int tpo_td043_probe(struct omap_dss_device *dssdev)
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goto fail_regulator;
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}
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if (gpio_is_valid(nreset_gpio)) {
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ret = gpio_request_one(nreset_gpio, GPIOF_OUT_INIT_LOW,
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"lcd reset");
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if (gpio_is_valid(tpo_td043->nreset_gpio)) {
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ret = devm_gpio_request_one(&dssdev->dev,
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tpo_td043->nreset_gpio, GPIOF_OUT_INIT_LOW,
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"lcd reset");
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if (ret < 0) {
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dev_err(&dssdev->dev, "couldn't request reset GPIO\n");
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goto fail_gpio_req;
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@ -457,14 +467,11 @@ fail_regulator:
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static void tpo_td043_remove(struct omap_dss_device *dssdev)
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{
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struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
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int nreset_gpio = dssdev->reset_gpio;
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dev_dbg(&dssdev->dev, "remove\n");
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sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
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regulator_put(tpo_td043->vcc_reg);
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if (gpio_is_valid(nreset_gpio))
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gpio_free(nreset_gpio);
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}
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static void tpo_td043_set_timings(struct omap_dss_device *dssdev,
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@ -527,7 +534,6 @@ static int tpo_td043_spi_probe(struct spi_device *spi)
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return -ENOMEM;
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tpo_td043->spi = spi;
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tpo_td043->nreset_gpio = dssdev->reset_gpio;
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dev_set_drvdata(&spi->dev, tpo_td043);
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g_tpo_td043 = tpo_td043;
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