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path: root/drivers/mfd/twl6040.c
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Diffstat (limited to 'drivers/mfd/twl6040.c')
-rw-r--r--drivers/mfd/twl6040.c748
1 files changed, 748 insertions, 0 deletions
diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
new file mode 100644
index 000000000000..f361bf38a0aa
--- /dev/null
+++ b/drivers/mfd/twl6040.c
@@ -0,0 +1,748 @@
+/*
+ * MFD driver for TWL6040 audio device
+ *
+ * Authors: Misael Lopez Cruz <misael.lopez@ti.com>
+ * Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
+ * Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * Copyright: (C) 2011 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/twl6040.h>
+#include <linux/regulator/consumer.h>
+
+#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
+#define TWL6040_NUM_SUPPLIES (2)
+
+static bool twl6040_has_vibra(struct twl6040_platform_data *pdata,
+ struct device_node *node)
+{
+ if (pdata && pdata->vibra)
+ return true;
+
+#ifdef CONFIG_OF
+ if (of_find_node_by_name(node, "vibra"))
+ return true;
+#endif
+
+ return false;
+}
+
+int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
+{
+ int ret;
+ unsigned int val;
+
+ /* Vibra control registers from cache */
+ if (unlikely(reg == TWL6040_REG_VIBCTLL ||
+ reg == TWL6040_REG_VIBCTLR)) {
+ val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
+ } else {
+ ret = regmap_read(twl6040->regmap, reg, &val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return val;
+}
+EXPORT_SYMBOL(twl6040_reg_read);
+
+int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
+{
+ int ret;
+
+ ret = regmap_write(twl6040->regmap, reg, val);
+ /* Cache the vibra control registers */
+ if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
+ twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
+
+ return ret;
+}
+EXPORT_SYMBOL(twl6040_reg_write);
+
+int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
+{
+ return regmap_update_bits(twl6040->regmap, reg, mask, mask);
+}
+EXPORT_SYMBOL(twl6040_set_bits);
+
+int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
+{
+ return regmap_update_bits(twl6040->regmap, reg, mask, 0);
+}
+EXPORT_SYMBOL(twl6040_clear_bits);
+
+/* twl6040 codec manual power-up sequence */
+static int twl6040_power_up_manual(struct twl6040 *twl6040)
+{
+ u8 ldoctl, ncpctl, lppllctl;
+ int ret;
+
+ /* enable high-side LDO, reference system and internal oscillator */
+ ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
+ ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+ if (ret)
+ return ret;
+ usleep_range(10000, 10500);
+
+ /* enable negative charge pump */
+ ncpctl = TWL6040_NCPENA;
+ ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
+ if (ret)
+ goto ncp_err;
+ usleep_range(1000, 1500);
+
+ /* enable low-side LDO */
+ ldoctl |= TWL6040_LSLDOENA;
+ ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+ if (ret)
+ goto lsldo_err;
+ usleep_range(1000, 1500);
+
+ /* enable low-power PLL */
+ lppllctl = TWL6040_LPLLENA;
+ ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
+ if (ret)
+ goto lppll_err;
+ usleep_range(5000, 5500);
+
+ /* disable internal oscillator */
+ ldoctl &= ~TWL6040_OSCENA;
+ ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+ if (ret)
+ goto osc_err;
+
+ return 0;
+
+osc_err:
+ lppllctl &= ~TWL6040_LPLLENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
+lppll_err:
+ ldoctl &= ~TWL6040_LSLDOENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+lsldo_err:
+ ncpctl &= ~TWL6040_NCPENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
+ncp_err:
+ ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
+ twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+
+ dev_err(twl6040->dev, "manual power-up failed\n");
+ return ret;
+}
+
+/* twl6040 manual power-down sequence */
+static void twl6040_power_down_manual(struct twl6040 *twl6040)
+{
+ u8 ncpctl, ldoctl, lppllctl;
+
+ ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
+ ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
+ lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
+
+ /* enable internal oscillator */
+ ldoctl |= TWL6040_OSCENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+ usleep_range(1000, 1500);
+
+ /* disable low-power PLL */
+ lppllctl &= ~TWL6040_LPLLENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
+
+ /* disable low-side LDO */
+ ldoctl &= ~TWL6040_LSLDOENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+
+ /* disable negative charge pump */
+ ncpctl &= ~TWL6040_NCPENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
+
+ /* disable high-side LDO, reference system and internal oscillator */
+ ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
+ twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+}
+
+static irqreturn_t twl6040_readyint_handler(int irq, void *data)
+{
+ struct twl6040 *twl6040 = data;
+
+ complete(&twl6040->ready);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t twl6040_thint_handler(int irq, void *data)
+{
+ struct twl6040 *twl6040 = data;
+ u8 status;
+
+ status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
+ if (status & TWL6040_TSHUTDET) {
+ dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
+ twl6040_power(twl6040, 0);
+ } else {
+ dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
+ twl6040_power(twl6040, 1);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int twl6040_power_up_automatic(struct twl6040 *twl6040)
+{
+ int time_left;
+
+ gpio_set_value(twl6040->audpwron, 1);
+
+ time_left = wait_for_completion_timeout(&twl6040->ready,
+ msecs_to_jiffies(144));
+ if (!time_left) {
+ u8 intid;
+
+ dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
+ intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
+ if (!(intid & TWL6040_READYINT)) {
+ dev_err(twl6040->dev, "automatic power-up failed\n");
+ gpio_set_value(twl6040->audpwron, 0);
+ return -ETIMEDOUT;
+ }
+ }
+
+ return 0;
+}
+
+int twl6040_power(struct twl6040 *twl6040, int on)
+{
+ int ret = 0;
+
+ mutex_lock(&twl6040->mutex);
+
+ if (on) {
+ /* already powered-up */
+ if (twl6040->power_count++)
+ goto out;
+
+ if (gpio_is_valid(twl6040->audpwron)) {
+ /* use automatic power-up sequence */
+ ret = twl6040_power_up_automatic(twl6040);
+ if (ret) {
+ twl6040->power_count = 0;
+ goto out;
+ }
+ } else {
+ /* use manual power-up sequence */
+ ret = twl6040_power_up_manual(twl6040);
+ if (ret) {
+ twl6040->power_count = 0;
+ goto out;
+ }
+ }
+ /* Default PLL configuration after power up */
+ twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
+ twl6040->sysclk = 19200000;
+ twl6040->mclk = 32768;
+ } else {
+ /* already powered-down */
+ if (!twl6040->power_count) {
+ dev_err(twl6040->dev,
+ "device is already powered-off\n");
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (--twl6040->power_count)
+ goto out;
+
+ if (gpio_is_valid(twl6040->audpwron)) {
+ /* use AUDPWRON line */
+ gpio_set_value(twl6040->audpwron, 0);
+
+ /* power-down sequence latency */
+ usleep_range(500, 700);
+ } else {
+ /* use manual power-down sequence */
+ twl6040_power_down_manual(twl6040);
+ }
+ twl6040->sysclk = 0;
+ twl6040->mclk = 0;
+ }
+
+out:
+ mutex_unlock(&twl6040->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(twl6040_power);
+
+int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
+ unsigned int freq_in, unsigned int freq_out)
+{
+ u8 hppllctl, lppllctl;
+ int ret = 0;
+
+ mutex_lock(&twl6040->mutex);
+
+ hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
+ lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
+
+ /* Force full reconfiguration when switching between PLL */
+ if (pll_id != twl6040->pll) {
+ twl6040->sysclk = 0;
+ twl6040->mclk = 0;
+ }
+
+ switch (pll_id) {
+ case TWL6040_SYSCLK_SEL_LPPLL:
+ /* low-power PLL divider */
+ /* Change the sysclk configuration only if it has been canged */
+ if (twl6040->sysclk != freq_out) {
+ switch (freq_out) {
+ case 17640000:
+ lppllctl |= TWL6040_LPLLFIN;
+ break;
+ case 19200000:
+ lppllctl &= ~TWL6040_LPLLFIN;
+ break;
+ default:
+ dev_err(twl6040->dev,
+ "freq_out %d not supported\n",
+ freq_out);
+ ret = -EINVAL;
+ goto pll_out;
+ }
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+ lppllctl);
+ }
+
+ /* The PLL in use has not been change, we can exit */
+ if (twl6040->pll == pll_id)
+ break;
+
+ switch (freq_in) {
+ case 32768:
+ lppllctl |= TWL6040_LPLLENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+ lppllctl);
+ mdelay(5);
+ lppllctl &= ~TWL6040_HPLLSEL;
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+ lppllctl);
+ hppllctl &= ~TWL6040_HPLLENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
+ hppllctl);
+ break;
+ default:
+ dev_err(twl6040->dev,
+ "freq_in %d not supported\n", freq_in);
+ ret = -EINVAL;
+ goto pll_out;
+ }
+ break;
+ case TWL6040_SYSCLK_SEL_HPPLL:
+ /* high-performance PLL can provide only 19.2 MHz */
+ if (freq_out != 19200000) {
+ dev_err(twl6040->dev,
+ "freq_out %d not supported\n", freq_out);
+ ret = -EINVAL;
+ goto pll_out;
+ }
+
+ if (twl6040->mclk != freq_in) {
+ hppllctl &= ~TWL6040_MCLK_MSK;
+
+ switch (freq_in) {
+ case 12000000:
+ /* PLL enabled, active mode */
+ hppllctl |= TWL6040_MCLK_12000KHZ |
+ TWL6040_HPLLENA;
+ break;
+ case 19200000:
+ /*
+ * PLL disabled
+ * (enable PLL if MCLK jitter quality
+ * doesn't meet specification)
+ */
+ hppllctl |= TWL6040_MCLK_19200KHZ;
+ break;
+ case 26000000:
+ /* PLL enabled, active mode */
+ hppllctl |= TWL6040_MCLK_26000KHZ |
+ TWL6040_HPLLENA;
+ break;
+ case 38400000:
+ /* PLL enabled, active mode */
+ hppllctl |= TWL6040_MCLK_38400KHZ |
+ TWL6040_HPLLENA;
+ break;
+ default:
+ dev_err(twl6040->dev,
+ "freq_in %d not supported\n", freq_in);
+ ret = -EINVAL;
+ goto pll_out;
+ }
+
+ /*
+ * enable clock slicer to ensure input waveform is
+ * square
+ */
+ hppllctl |= TWL6040_HPLLSQRENA;
+
+ twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
+ hppllctl);
+ usleep_range(500, 700);
+ lppllctl |= TWL6040_HPLLSEL;
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+ lppllctl);
+ lppllctl &= ~TWL6040_LPLLENA;
+ twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+ lppllctl);
+ }
+ break;
+ default:
+ dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
+ ret = -EINVAL;
+ goto pll_out;
+ }
+
+ twl6040->sysclk = freq_out;
+ twl6040->mclk = freq_in;
+ twl6040->pll = pll_id;
+
+pll_out:
+ mutex_unlock(&twl6040->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(twl6040_set_pll);
+
+int twl6040_get_pll(struct twl6040 *twl6040)
+{
+ if (twl6040->power_count)
+ return twl6040->pll;
+ else
+ return -ENODEV;
+}
+EXPORT_SYMBOL(twl6040_get_pll);
+
+unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
+{
+ return twl6040->sysclk;
+}
+EXPORT_SYMBOL(twl6040_get_sysclk);
+
+/* Get the combined status of the vibra control register */
+int twl6040_get_vibralr_status(struct twl6040 *twl6040)
+{
+ u8 status;
+
+ status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
+ status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
+
+ return status;
+}
+EXPORT_SYMBOL(twl6040_get_vibralr_status);
+
+static struct resource twl6040_vibra_rsrc[] = {
+ {
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource twl6040_codec_rsrc[] = {
+ {
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
+{
+ /* Register 0 is not readable */
+ if (!reg)
+ return false;
+ return true;
+}
+
+static struct regmap_config twl6040_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TWL6040_REG_STATUS, /* 0x2e */
+
+ .readable_reg = twl6040_readable_reg,
+};
+
+static const struct regmap_irq twl6040_irqs[] = {
+ { .reg_offset = 0, .mask = TWL6040_THINT, },
+ { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
+ { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
+ { .reg_offset = 0, .mask = TWL6040_HFINT, },
+ { .reg_offset = 0, .mask = TWL6040_VIBINT, },
+ { .reg_offset = 0, .mask = TWL6040_READYINT, },
+};
+
+static struct regmap_irq_chip twl6040_irq_chip = {
+ .name = "twl6040",
+ .irqs = twl6040_irqs,
+ .num_irqs = ARRAY_SIZE(twl6040_irqs),
+
+ .num_regs = 1,
+ .status_base = TWL6040_REG_INTID,
+ .mask_base = TWL6040_REG_INTMR,
+};
+
+static int twl6040_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct twl6040_platform_data *pdata = client->dev.platform_data;
+ struct device_node *node = client->dev.of_node;
+ struct twl6040 *twl6040;
+ struct mfd_cell *cell = NULL;
+ int irq, ret, children = 0;
+
+ if (!pdata && !node) {
+ dev_err(&client->dev, "Platform data is missing\n");
+ return -EINVAL;
+ }
+
+ /* In order to operate correctly we need valid interrupt config */
+ if (!client->irq) {
+ dev_err(&client->dev, "Invalid IRQ configuration\n");
+ return -EINVAL;
+ }
+
+ twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
+ GFP_KERNEL);
+ if (!twl6040) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
+ if (IS_ERR(twl6040->regmap)) {
+ ret = PTR_ERR(twl6040->regmap);
+ goto err;
+ }
+
+ i2c_set_clientdata(client, twl6040);
+
+ twl6040->supplies[0].supply = "vio";
+ twl6040->supplies[1].supply = "v2v1";
+ ret = regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
+ twl6040->supplies);
+ if (ret != 0) {
+ dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
+ goto regulator_get_err;
+ }
+
+ ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+ if (ret != 0) {
+ dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
+ goto power_err;
+ }
+
+ twl6040->dev = &client->dev;
+ twl6040->irq = client->irq;
+
+ mutex_init(&twl6040->mutex);
+ init_completion(&twl6040->ready);
+
+ twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
+
+ /* ERRATA: Automatic power-up is not possible in ES1.0 */
+ if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
+ if (pdata)
+ twl6040->audpwron = pdata->audpwron_gpio;
+ else
+ twl6040->audpwron = of_get_named_gpio(node,
+ "ti,audpwron-gpio", 0);
+ } else
+ twl6040->audpwron = -EINVAL;
+
+ if (gpio_is_valid(twl6040->audpwron)) {
+ ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
+ "audpwron");
+ if (ret)
+ goto gpio_err;
+ }
+
+ ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq,
+ IRQF_ONESHOT, 0, &twl6040_irq_chip,
+ &twl6040->irq_data);
+ if (ret < 0)
+ goto irq_init_err;
+
+ twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
+ TWL6040_IRQ_READY);
+ twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
+ TWL6040_IRQ_TH);
+
+ ret = request_threaded_irq(twl6040->irq_ready, NULL,
+ twl6040_readyint_handler, IRQF_ONESHOT,
+ "twl6040_irq_ready", twl6040);
+ if (ret) {
+ dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
+ goto readyirq_err;
+ }
+
+ ret = request_threaded_irq(twl6040->irq_th, NULL,
+ twl6040_thint_handler, IRQF_ONESHOT,
+ "twl6040_irq_th", twl6040);
+ if (ret) {
+ dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
+ goto thirq_err;
+ }
+
+ /* dual-access registers controlled by I2C only */
+ twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
+
+ /*
+ * The main functionality of twl6040 to provide audio on OMAP4+ systems.
+ * We can add the ASoC codec child whenever this driver has been loaded.
+ * The ASoC codec can work without pdata, pass the platform_data only if
+ * it has been provided.
+ */
+ irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
+ cell = &twl6040->cells[children];
+ cell->name = "twl6040-codec";
+ twl6040_codec_rsrc[0].start = irq;
+ twl6040_codec_rsrc[0].end = irq;
+ cell->resources = twl6040_codec_rsrc;
+ cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
+ if (pdata && pdata->codec) {
+ cell->platform_data = pdata->codec;
+ cell->pdata_size = sizeof(*pdata->codec);
+ }
+ children++;
+
+ if (twl6040_has_vibra(pdata, node)) {
+ irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
+
+ cell = &twl6040->cells[children];
+ cell->name = "twl6040-vibra";
+ twl6040_vibra_rsrc[0].start = irq;
+ twl6040_vibra_rsrc[0].end = irq;
+ cell->resources = twl6040_vibra_rsrc;
+ cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
+
+ if (pdata && pdata->vibra) {
+ cell->platform_data = pdata->vibra;
+ cell->pdata_size = sizeof(*pdata->vibra);
+ }
+ children++;
+ }
+
+ /*
+ * Enable the GPO driver in the following cases:
+ * DT booted kernel or legacy boot with valid gpo platform_data
+ */
+ if (!pdata || (pdata && pdata->gpo)) {
+ cell = &twl6040->cells[children];
+ cell->name = "twl6040-gpo";
+
+ if (pdata) {
+ cell->platform_data = pdata->gpo;
+ cell->pdata_size = sizeof(*pdata->gpo);
+ }
+ children++;
+ }
+
+ ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
+ NULL, 0, NULL);
+ if (ret)
+ goto mfd_err;
+
+ return 0;
+
+mfd_err:
+ free_irq(twl6040->irq_th, twl6040);
+thirq_err:
+ free_irq(twl6040->irq_ready, twl6040);
+readyirq_err:
+ regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
+irq_init_err:
+ if (gpio_is_valid(twl6040->audpwron))
+ gpio_free(twl6040->audpwron);
+gpio_err:
+ regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+power_err:
+ regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+regulator_get_err:
+ i2c_set_clientdata(client, NULL);
+err:
+ return ret;
+}
+
+static int twl6040_remove(struct i2c_client *client)
+{
+ struct twl6040 *twl6040 = i2c_get_clientdata(client);
+
+ if (twl6040->power_count)
+ twl6040_power(twl6040, 0);
+
+ if (gpio_is_valid(twl6040->audpwron))
+ gpio_free(twl6040->audpwron);
+
+ free_irq(twl6040->irq_ready, twl6040);
+ free_irq(twl6040->irq_th, twl6040);
+ regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
+
+ mfd_remove_devices(&client->dev);
+ i2c_set_clientdata(client, NULL);
+
+ regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+ regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+
+ return 0;
+}
+
+static const struct i2c_device_id twl6040_i2c_id[] = {
+ { "twl6040", 0, },
+ { "twl6041", 0, },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
+
+static struct i2c_driver twl6040_driver = {
+ .driver = {
+ .name = "twl6040",
+ .owner = THIS_MODULE,
+ },
+ .probe = twl6040_probe,
+ .remove = twl6040_remove,
+ .id_table = twl6040_i2c_id,
+};
+
+module_i2c_driver(twl6040_driver);
+
+MODULE_DESCRIPTION("TWL6040 MFD");
+MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
+MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:twl6040");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.