| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Rabin Vincent | 3515 | 53.66% | 1 | 1.69% |
| Patrice Chotard | 585 | 8.93% | 5 | 8.47% |
| Viresh Kumar | 500 | 7.63% | 6 | 10.17% |
| Jean-Nicolas Graux | 358 | 5.46% | 1 | 1.69% |
| Lee Jones | 329 | 5.02% | 7 | 11.86% |
| Linus Walleij | 304 | 4.64% | 7 | 11.86% |
| Stefan Agner | 269 | 4.11% | 1 | 1.69% |
| Sundar R Iyer | 244 | 3.72% | 2 | 3.39% |
| Chris Blair | 192 | 2.93% | 1 | 1.69% |
| Vipul Kumar Samar | 61 | 0.93% | 3 | 5.08% |
| Dmitry Torokhov | 40 | 0.61% | 2 | 3.39% |
| Gabriel Fernandez | 34 | 0.52% | 2 | 3.39% |
| Mark Brown | 34 | 0.52% | 3 | 5.08% |
| Francesco Dolcini | 20 | 0.31% | 1 | 1.69% |
| Christophe Jaillet | 14 | 0.21% | 1 | 1.69% |
| Hugues Fruchet | 12 | 0.18% | 1 | 1.69% |
| Thomas Gleixner | 8 | 0.12% | 2 | 3.39% |
| Paul Cercueil | 6 | 0.09% | 1 | 1.69% |
| Geert Uytterhoeven | 5 | 0.08% | 1 | 1.69% |
| Rikard Falkeborn | 4 | 0.06% | 1 | 1.69% |
| Samuel Ortiz | 3 | 0.05% | 1 | 1.69% |
| Randy Dunlap | 3 | 0.05% | 1 | 1.69% |
| Marc Zyngier | 2 | 0.03% | 1 | 1.69% |
| Sean Cross | 2 | 0.03% | 1 | 1.69% |
| Rob Herring | 2 | 0.03% | 1 | 1.69% |
| Uwe Kleine-König | 1 | 0.02% | 1 | 1.69% |
| Om Prakash | 1 | 0.02% | 1 | 1.69% |
| Javier Martinez Canillas | 1 | 0.02% | 1 | 1.69% |
| Krzysztof Kozlowski | 1 | 0.02% | 1 | 1.69% |
| Oleksandr Suvorov | 1 | 0.02% | 1 | 1.69% |
| Total | 6551 | 59 |
// SPDX-License-Identifier: GPL-2.0-only /* * ST Microelectronics MFD: stmpe's driver * * Copyright (C) ST-Ericsson SA 2010 * * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson */ #include <linux/err.h> #include <linux/gpio/consumer.h> #include <linux/export.h> #include <linux/kernel.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/of.h> #include <linux/pm.h> #include <linux/slab.h> #include <linux/mfd/core.h> #include <linux/delay.h> #include <linux/regulator/consumer.h> #include "stmpe.h" /** * struct stmpe_platform_data - STMPE platform data * @id: device id to distinguish between multiple STMPEs on the same board * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*) * @irq_trigger: IRQ trigger to use for the interrupt to the host * @autosleep: bool to enable/disable stmpe autosleep * @autosleep_timeout: inactivity timeout in milliseconds for autosleep */ struct stmpe_platform_data { int id; unsigned int blocks; unsigned int irq_trigger; bool autosleep; int autosleep_timeout; }; static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks) { return stmpe->variant->enable(stmpe, blocks, true); } static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks) { return stmpe->variant->enable(stmpe, blocks, false); } static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg) { int ret; ret = stmpe->ci->read_byte(stmpe, reg); if (ret < 0) dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret); dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret); return ret; } static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) { int ret; dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val); ret = stmpe->ci->write_byte(stmpe, reg, val); if (ret < 0) dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret); return ret; } static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) { int ret; ret = __stmpe_reg_read(stmpe, reg); if (ret < 0) return ret; ret &= ~mask; ret |= val; return __stmpe_reg_write(stmpe, reg, ret); } static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) { int ret; ret = stmpe->ci->read_block(stmpe, reg, length, values); if (ret < 0) dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret); dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret); stmpe_dump_bytes("stmpe rd: ", values, length); return ret; } static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, const u8 *values) { int ret; dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length); stmpe_dump_bytes("stmpe wr: ", values, length); ret = stmpe->ci->write_block(stmpe, reg, length, values); if (ret < 0) dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret); return ret; } /** * stmpe_enable - enable blocks on an STMPE device * @stmpe: Device to work on * @blocks: Mask of blocks (enum stmpe_block values) to enable */ int stmpe_enable(struct stmpe *stmpe, unsigned int blocks) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_enable(stmpe, blocks); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_enable); /** * stmpe_disable - disable blocks on an STMPE device * @stmpe: Device to work on * @blocks: Mask of blocks (enum stmpe_block values) to enable */ int stmpe_disable(struct stmpe *stmpe, unsigned int blocks) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_disable(stmpe, blocks); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_disable); /** * stmpe_reg_read() - read a single STMPE register * @stmpe: Device to read from * @reg: Register to read */ int stmpe_reg_read(struct stmpe *stmpe, u8 reg) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_reg_read(stmpe, reg); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_reg_read); /** * stmpe_reg_write() - write a single STMPE register * @stmpe: Device to write to * @reg: Register to write * @val: Value to write */ int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_reg_write(stmpe, reg, val); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_reg_write); /** * stmpe_set_bits() - set the value of a bitfield in a STMPE register * @stmpe: Device to write to * @reg: Register to write * @mask: Mask of bits to set * @val: Value to set */ int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_set_bits(stmpe, reg, mask, val); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_set_bits); /** * stmpe_block_read() - read multiple STMPE registers * @stmpe: Device to read from * @reg: First register * @length: Number of registers * @values: Buffer to write to */ int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_block_read(stmpe, reg, length, values); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_block_read); /** * stmpe_block_write() - write multiple STMPE registers * @stmpe: Device to write to * @reg: First register * @length: Number of registers * @values: Values to write */ int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, const u8 *values) { int ret; mutex_lock(&stmpe->lock); ret = __stmpe_block_write(stmpe, reg, length, values); mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_block_write); /** * stmpe_set_altfunc()- set the alternate function for STMPE pins * @stmpe: Device to configure * @pins: Bitmask of pins to affect * @block: block to enable alternate functions for * * @pins is assumed to have a bit set for each of the bits whose alternate * function is to be changed, numbered according to the GPIOXY numbers. * * If the GPIO module is not enabled, this function automatically enables it in * order to perform the change. */ int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block) { struct stmpe_variant_info *variant = stmpe->variant; u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB]; int af_bits = variant->af_bits; int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8); int mask = (1 << af_bits) - 1; u8 regs[8]; int af, afperreg, ret; if (!variant->get_altfunc) return 0; afperreg = 8 / af_bits; mutex_lock(&stmpe->lock); ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO); if (ret < 0) goto out; ret = __stmpe_block_read(stmpe, regaddr, numregs, regs); if (ret < 0) goto out; af = variant->get_altfunc(stmpe, block); while (pins) { int pin = __ffs(pins); int regoffset = numregs - (pin / afperreg) - 1; int pos = (pin % afperreg) * (8 / afperreg); regs[regoffset] &= ~(mask << pos); regs[regoffset] |= af << pos; pins &= ~(1 << pin); } ret = __stmpe_block_write(stmpe, regaddr, numregs, regs); out: mutex_unlock(&stmpe->lock); return ret; } EXPORT_SYMBOL_GPL(stmpe_set_altfunc); /* * GPIO (all variants) */ static struct resource stmpe_gpio_resources[] = { /* Start and end filled dynamically */ { .flags = IORESOURCE_IRQ, }, }; static const struct mfd_cell stmpe_gpio_cell = { .name = "stmpe-gpio", .of_compatible = "st,stmpe-gpio", .resources = stmpe_gpio_resources, .num_resources = ARRAY_SIZE(stmpe_gpio_resources), }; static const struct mfd_cell stmpe_gpio_cell_noirq = { .name = "stmpe-gpio", .of_compatible = "st,stmpe-gpio", /* gpio cell resources consist of an irq only so no resources here */ }; /* * Keypad (1601, 2401, 2403) */ static struct resource stmpe_keypad_resources[] = { /* Start and end filled dynamically */ { .name = "KEYPAD", .flags = IORESOURCE_IRQ, }, { .name = "KEYPAD_OVER", .flags = IORESOURCE_IRQ, }, }; static const struct mfd_cell stmpe_keypad_cell = { .name = "stmpe-keypad", .of_compatible = "st,stmpe-keypad", .resources = stmpe_keypad_resources, .num_resources = ARRAY_SIZE(stmpe_keypad_resources), }; /* * PWM (1601, 2401, 2403) */ static struct resource stmpe_pwm_resources[] = { /* Start and end filled dynamically */ { .name = "PWM0", .flags = IORESOURCE_IRQ, }, { .name = "PWM1", .flags = IORESOURCE_IRQ, }, { .name = "PWM2", .flags = IORESOURCE_IRQ, }, }; static const struct mfd_cell stmpe_pwm_cell = { .name = "stmpe-pwm", .of_compatible = "st,stmpe-pwm", .resources = stmpe_pwm_resources, .num_resources = ARRAY_SIZE(stmpe_pwm_resources), }; /* * STMPE801 */ static const u8 stmpe801_regs[] = { [STMPE_IDX_CHIP_ID] = STMPE801_REG_CHIP_ID, [STMPE_IDX_ICR_LSB] = STMPE801_REG_SYS_CTRL, [STMPE_IDX_GPMR_LSB] = STMPE801_REG_GPIO_MP_STA, [STMPE_IDX_GPSR_LSB] = STMPE801_REG_GPIO_SET_PIN, [STMPE_IDX_GPCR_LSB] = STMPE801_REG_GPIO_SET_PIN, [STMPE_IDX_GPDR_LSB] = STMPE801_REG_GPIO_DIR, [STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN, [STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA, }; static struct stmpe_variant_block stmpe801_blocks[] = { { .cell = &stmpe_gpio_cell, .irq = 0, .block = STMPE_BLOCK_GPIO, }, }; static struct stmpe_variant_block stmpe801_blocks_noirq[] = { { .cell = &stmpe_gpio_cell_noirq, .block = STMPE_BLOCK_GPIO, }, }; static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks, bool enable) { if (blocks & STMPE_BLOCK_GPIO) return 0; else return -EINVAL; } static struct stmpe_variant_info stmpe801 = { .name = "stmpe801", .id_val = STMPE801_ID, .id_mask = 0xffff, .num_gpios = 8, .regs = stmpe801_regs, .blocks = stmpe801_blocks, .num_blocks = ARRAY_SIZE(stmpe801_blocks), .num_irqs = STMPE801_NR_INTERNAL_IRQS, .enable = stmpe801_enable, }; static struct stmpe_variant_info stmpe801_noirq = { .name = "stmpe801", .id_val = STMPE801_ID, .id_mask = 0xffff, .num_gpios = 8, .regs = stmpe801_regs, .blocks = stmpe801_blocks_noirq, .num_blocks = ARRAY_SIZE(stmpe801_blocks_noirq), .enable = stmpe801_enable, }; /* * Touchscreen (STMPE811 or STMPE610) */ static struct resource stmpe_ts_resources[] = { /* Start and end filled dynamically */ { .name = "TOUCH_DET", .flags = IORESOURCE_IRQ, }, { .name = "FIFO_TH", .flags = IORESOURCE_IRQ, }, }; static const struct mfd_cell stmpe_ts_cell = { .name = "stmpe-ts", .of_compatible = "st,stmpe-ts", .resources = stmpe_ts_resources, .num_resources = ARRAY_SIZE(stmpe_ts_resources), }; /* * ADC (STMPE811) */ static struct resource stmpe_adc_resources[] = { /* Start and end filled dynamically */ { .name = "STMPE_TEMP_SENS", .flags = IORESOURCE_IRQ, }, { .name = "STMPE_ADC", .flags = IORESOURCE_IRQ, }, }; static const struct mfd_cell stmpe_adc_cell = { .name = "stmpe-adc", .of_compatible = "st,stmpe-adc", .resources = stmpe_adc_resources, .num_resources = ARRAY_SIZE(stmpe_adc_resources), }; /* * STMPE811 or STMPE610 */ static const u8 stmpe811_regs[] = { [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID, [STMPE_IDX_SYS_CTRL] = STMPE811_REG_SYS_CTRL, [STMPE_IDX_SYS_CTRL2] = STMPE811_REG_SYS_CTRL2, [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL, [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN, [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA, [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA, [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN, [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN, [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR, [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE, [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE, [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF, [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN, [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA, [STMPE_IDX_GPEDR_LSB] = STMPE811_REG_GPIO_ED, }; static struct stmpe_variant_block stmpe811_blocks[] = { { .cell = &stmpe_gpio_cell, .irq = STMPE811_IRQ_GPIOC, .block = STMPE_BLOCK_GPIO, }, { .cell = &stmpe_ts_cell, .irq = STMPE811_IRQ_TOUCH_DET, .block = STMPE_BLOCK_TOUCHSCREEN, }, { .cell = &stmpe_adc_cell, .irq = STMPE811_IRQ_TEMP_SENS, .block = STMPE_BLOCK_ADC, }, }; static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks, bool enable) { unsigned int mask = 0; if (blocks & STMPE_BLOCK_GPIO) mask |= STMPE811_SYS_CTRL2_GPIO_OFF; if (blocks & STMPE_BLOCK_ADC) mask |= STMPE811_SYS_CTRL2_ADC_OFF; if (blocks & STMPE_BLOCK_TOUCHSCREEN) mask |= STMPE811_SYS_CTRL2_TSC_OFF; return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], mask, enable ? 0 : mask); } int stmpe811_adc_common_init(struct stmpe *stmpe) { int ret; u8 adc_ctrl1, adc_ctrl1_mask; adc_ctrl1 = STMPE_SAMPLE_TIME(stmpe->sample_time) | STMPE_MOD_12B(stmpe->mod_12b) | STMPE_REF_SEL(stmpe->ref_sel); adc_ctrl1_mask = STMPE_SAMPLE_TIME(0xff) | STMPE_MOD_12B(0xff) | STMPE_REF_SEL(0xff); ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL1, adc_ctrl1_mask, adc_ctrl1); if (ret) { dev_err(stmpe->dev, "Could not setup ADC\n"); return ret; } ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL2, STMPE_ADC_FREQ(0xff), STMPE_ADC_FREQ(stmpe->adc_freq)); if (ret) { dev_err(stmpe->dev, "Could not setup ADC\n"); return ret; } return 0; } EXPORT_SYMBOL_GPL(stmpe811_adc_common_init); static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) { /* 0 for touchscreen, 1 for GPIO */ return block != STMPE_BLOCK_TOUCHSCREEN; } static struct stmpe_variant_info stmpe811 = { .name = "stmpe811", .id_val = 0x0811, .id_mask = 0xffff, .num_gpios = 8, .af_bits = 1, .regs = stmpe811_regs, .blocks = stmpe811_blocks, .num_blocks = ARRAY_SIZE(stmpe811_blocks), .num_irqs = STMPE811_NR_INTERNAL_IRQS, .enable = stmpe811_enable, .get_altfunc = stmpe811_get_altfunc, }; /* Similar to 811, except number of gpios */ static struct stmpe_variant_info stmpe610 = { .name = "stmpe610", .id_val = 0x0811, .id_mask = 0xffff, .num_gpios = 6, .af_bits = 1, .regs = stmpe811_regs, .blocks = stmpe811_blocks, .num_blocks = ARRAY_SIZE(stmpe811_blocks), .num_irqs = STMPE811_NR_INTERNAL_IRQS, .enable = stmpe811_enable, .get_altfunc = stmpe811_get_altfunc, }; /* * STMPE1600 * Compared to all others STMPE variant, LSB and MSB regs are located in this * order : LSB addr * MSB addr + 1 * As there is only 2 * 8bits registers for GPMR/GPSR/IEGPIOPR, CSB index is MSB registers */ static const u8 stmpe1600_regs[] = { [STMPE_IDX_CHIP_ID] = STMPE1600_REG_CHIP_ID, [STMPE_IDX_SYS_CTRL] = STMPE1600_REG_SYS_CTRL, [STMPE_IDX_ICR_LSB] = STMPE1600_REG_SYS_CTRL, [STMPE_IDX_GPMR_LSB] = STMPE1600_REG_GPMR_LSB, [STMPE_IDX_GPMR_CSB] = STMPE1600_REG_GPMR_MSB, [STMPE_IDX_GPSR_LSB] = STMPE1600_REG_GPSR_LSB, [STMPE_IDX_GPSR_CSB] = STMPE1600_REG_GPSR_MSB, [STMPE_IDX_GPCR_LSB] = STMPE1600_REG_GPSR_LSB, [STMPE_IDX_GPCR_CSB] = STMPE1600_REG_GPSR_MSB, [STMPE_IDX_GPDR_LSB] = STMPE1600_REG_GPDR_LSB, [STMPE_IDX_GPDR_CSB] = STMPE1600_REG_GPDR_MSB, [STMPE_IDX_IEGPIOR_LSB] = STMPE1600_REG_IEGPIOR_LSB, [STMPE_IDX_IEGPIOR_CSB] = STMPE1600_REG_IEGPIOR_MSB, [STMPE_IDX_ISGPIOR_LSB] = STMPE1600_REG_ISGPIOR_LSB, }; static struct stmpe_variant_block stmpe1600_blocks[] = { { .cell = &stmpe_gpio_cell, .irq = 0, .block = STMPE_BLOCK_GPIO, }, }; static int stmpe1600_enable(struct stmpe *stmpe, unsigned int blocks, bool enable) { if (blocks & STMPE_BLOCK_GPIO) return 0; else return -EINVAL; } static struct stmpe_variant_info stmpe1600 = { .name = "stmpe1600", .id_val = STMPE1600_ID, .id_mask = 0xffff, .num_gpios = 16, .af_bits = 0, .regs = stmpe1600_regs, .blocks = stmpe1600_blocks, .num_blocks = ARRAY_SIZE(stmpe1600_blocks), .num_irqs = STMPE1600_NR_INTERNAL_IRQS, .enable = stmpe1600_enable, }; /* * STMPE1601 */ static const u8 stmpe1601_regs[] = { [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID, [STMPE_IDX_SYS_CTRL] = STMPE1601_REG_SYS_CTRL, [STMPE_IDX_SYS_CTRL2] = STMPE1601_REG_SYS_CTRL2, [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB, [STMPE_IDX_IER_MSB] = STMPE1601_REG_IER_MSB, [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB, [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB, [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB, [STMPE_IDX_GPMR_CSB] = STMPE1601_REG_GPIO_MP_MSB, [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB, [STMPE_IDX_GPSR_CSB] = STMPE1601_REG_GPIO_SET_MSB, [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB, [STMPE_IDX_GPCR_CSB] = STMPE1601_REG_GPIO_CLR_MSB, [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB, [STMPE_IDX_GPDR_CSB] = STMPE1601_REG_GPIO_SET_DIR_MSB, [STMPE_IDX_GPEDR_LSB] = STMPE1601_REG_GPIO_ED_LSB, [STMPE_IDX_GPEDR_CSB] = STMPE1601_REG_GPIO_ED_MSB, [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB, [STMPE_IDX_GPRER_CSB] = STMPE1601_REG_GPIO_RE_MSB, [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB, [STMPE_IDX_GPFER_CSB] = STMPE1601_REG_GPIO_FE_MSB, [STMPE_IDX_GPPUR_LSB] = STMPE1601_REG_GPIO_PU_LSB, [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB, [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB, [STMPE_IDX_IEGPIOR_CSB] = STMPE1601_REG_INT_EN_GPIO_MASK_MSB, [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB, }; static struct stmpe_variant_block stmpe1601_blocks[] = { { .cell = &stmpe_gpio_cell, .irq = STMPE1601_IRQ_GPIOC, .block = STMPE_BLOCK_GPIO, }, { .cell = &stmpe_keypad_cell, .irq = STMPE1601_IRQ_KEYPAD, .block = STMPE_BLOCK_KEYPAD, }, { .cell = &stmpe_pwm_cell, .irq = STMPE1601_IRQ_PWM0, .block = STMPE_BLOCK_PWM, }, }; /* supported autosleep timeout delay (in msecs) */ static const int stmpe_autosleep_delay[] = { 4, 16, 32, 64, 128, 256, 512, 1024, }; static int stmpe_round_timeout(int timeout) { int i; for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) { if (stmpe_autosleep_delay[i] >= timeout) return i; } /* * requests for delays longer than supported should not return the * longest supported delay */ return -EINVAL; } static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout) { int ret; if (!stmpe->variant->enable_autosleep) return -ENOSYS; mutex_lock(&stmpe->lock); ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout); mutex_unlock(&stmpe->lock); return ret; } /* * Both stmpe 1601/2403 support same layout for autosleep */ static int stmpe1601_autosleep(struct stmpe *stmpe, int autosleep_timeout) { int ret, timeout; /* choose the best available timeout */ timeout = stmpe_round_timeout(autosleep_timeout); if (timeout < 0) { dev_err(stmpe->dev, "invalid timeout\n"); return timeout; } ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], STMPE1601_AUTOSLEEP_TIMEOUT_MASK, timeout); if (ret < 0) return ret; return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], STPME1601_AUTOSLEEP_ENABLE, STPME1601_AUTOSLEEP_ENABLE); } static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks, bool enable) { unsigned int mask = 0; if (blocks & STMPE_BLOCK_GPIO) mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO; else mask &= ~STMPE1601_SYS_CTRL_ENABLE_GPIO; if (blocks & STMPE_BLOCK_KEYPAD) mask |= STMPE1601_SYS_CTRL_ENABLE_KPC; else mask &= ~STMPE1601_SYS_CTRL_ENABLE_KPC; if (blocks & STMPE_BLOCK_PWM) mask |= STMPE1601_SYS_CTRL_ENABLE_SPWM; else mask &= ~STMPE1601_SYS_CTRL_ENABLE_SPWM; return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask, enable ? mask : 0); } static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) { switch (block) { case STMPE_BLOCK_PWM: return 2; case STMPE_BLOCK_KEYPAD: return 1; case STMPE_BLOCK_GPIO: default: return 0; } } static struct stmpe_variant_info stmpe1601 = { .name = "stmpe1601", .id_val = 0x0210, .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */ .num_gpios = 16, .af_bits = 2, .regs = stmpe1601_regs, .blocks = stmpe1601_blocks, .num_blocks = ARRAY_SIZE(stmpe1601_blocks), .num_irqs = STMPE1601_NR_INTERNAL_IRQS, .enable = stmpe1601_enable, .get_altfunc = stmpe1601_get_altfunc, .enable_autosleep = stmpe1601_autosleep, }; /* * STMPE1801 */ static const u8 stmpe1801_regs[] = { [STMPE_IDX_CHIP_ID] = STMPE1801_REG_CHIP_ID, [STMPE_IDX_SYS_CTRL] = STMPE1801_REG_SYS_CTRL, [STMPE_IDX_ICR_LSB] = STMPE1801_REG_INT_CTRL_LOW, [STMPE_IDX_IER_LSB] = STMPE1801_REG_INT_EN_MASK_LOW, [STMPE_IDX_ISR_LSB] = STMPE1801_REG_INT_STA_LOW, [STMPE_IDX_GPMR_LSB] = STMPE1801_REG_GPIO_MP_LOW, [STMPE_IDX_GPMR_CSB] = STMPE1801_REG_GPIO_MP_MID, [STMPE_IDX_GPMR_MSB] = STMPE1801_REG_GPIO_MP_HIGH, [STMPE_IDX_GPSR_LSB] = STMPE1801_REG_GPIO_SET_LOW, [STMPE_IDX_GPSR_CSB] = STMPE1801_REG_GPIO_SET_MID, [STMPE_IDX_GPSR_MSB] = STMPE1801_REG_GPIO_SET_HIGH, [STMPE_IDX_GPCR_LSB] = STMPE1801_REG_GPIO_CLR_LOW, [STMPE_IDX_GPCR_CSB] = STMPE1801_REG_GPIO_CLR_MID, [STMPE_IDX_GPCR_MSB] = STMPE1801_REG_GPIO_CLR_HIGH, [STMPE_IDX_GPDR_LSB] = STMPE1801_REG_GPIO_SET_DIR_LOW, [STMPE_IDX_GPDR_CSB] = STMPE1801_REG_GPIO_SET_DIR_MID, [STMPE_IDX_GPDR_MSB] = STMPE1801_REG_GPIO_SET_DIR_HIGH, [STMPE_IDX_GPRER_LSB] = STMPE1801_REG_GPIO_RE_LOW, [STMPE_IDX_GPRER_CSB] = STMPE1801_REG_GPIO_RE_MID, [STMPE_IDX_GPRER_MSB] = STMPE1801_REG_GPIO_RE_HIGH, [STMPE_IDX_GPFER_LSB] = STMPE1801_REG_GPIO_FE_LOW, [STMPE_IDX_GPFER_CSB] = STMPE1801_REG_GPIO_FE_MID, [STMPE_IDX_GPFER_MSB] = STMPE1801_REG_GPIO_FE_HIGH, [STMPE_IDX_GPPUR_LSB] = STMPE1801_REG_GPIO_PULL_UP_LOW, [STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW, [STMPE_IDX_IEGPIOR_CSB] = STMPE1801_REG_INT_EN_GPIO_MASK_MID, [STMPE_IDX_IEGPIOR_MSB] = STMPE1801_REG_INT_EN_GPIO_MASK_HIGH, [STMPE_IDX_ISGPIOR_MSB] = STMPE1801_REG_INT_STA_GPIO_HIGH, }; static struct stmpe_variant_block stmpe1801_blocks[] = { { .cell = &stmpe_gpio_cell, .irq = STMPE1801_IRQ_GPIOC, .block = STMPE_BLOCK_GPIO, }, { .cell = &stmpe_keypad_cell, .irq = STMPE1801_IRQ_KEYPAD, .block = STMPE_BLOCK_KEYPAD, }, }; static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks, bool enable) { unsigned int mask = 0; if (blocks & STMPE_BLOCK_GPIO) mask |= STMPE1801_MSK_INT_EN_GPIO; if (blocks & STMPE_BLOCK_KEYPAD) mask |= STMPE1801_MSK_INT_EN_KPC; return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask, enable ? mask : 0); } static int stmpe_reset(struct stmpe *stmpe) { u16 id_val = stmpe->variant->id_val; unsigned long timeout; int ret = 0; u8 reset_bit; if (id_val == STMPE811_ID) /* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */ reset_bit = STMPE811_SYS_CTRL_RESET; else /* all other STMPE variant use bit 7 of SYS_CTRL register */ reset_bit = STMPE_SYS_CTRL_RESET; ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], reset_bit, reset_bit); if (ret < 0) return ret; msleep(10); timeout = jiffies + msecs_to_jiffies(100); while (time_before(jiffies, timeout)) { ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]); if (ret < 0) return ret; if (!(ret & reset_bit)) return 0; usleep_range(100, 200); } return -EIO; } static struct stmpe_variant_info stmpe1801 = { .name = "stmpe1801", .id_val = STMPE1801_ID, .id_mask = 0xfff0, .num_gpios = 18, .af_bits = 0, .regs = stmpe1801_regs, .blocks = stmpe1801_blocks, .num_blocks = ARRAY_SIZE(stmpe1801_blocks), .num_irqs = STMPE1801_NR_INTERNAL_IRQS, .enable = stmpe1801_enable, /* stmpe1801 do not have any gpio alternate function */ .get_altfunc = NULL, }; /* * STMPE24XX */ static const u8 stmpe24xx_regs[] = { [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID, [STMPE_IDX_SYS_CTRL] = STMPE24XX_REG_SYS_CTRL, [STMPE_IDX_SYS_CTRL2] = STMPE24XX_REG_SYS_CTRL2, [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB, [STMPE_IDX_IER_MSB] = STMPE24XX_REG_IER_MSB, [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB, [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB, [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB, [STMPE_IDX_GPMR_CSB] = STMPE24XX_REG_GPMR_CSB, [STMPE_IDX_GPMR_MSB] = STMPE24XX_REG_GPMR_MSB, [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB, [STMPE_IDX_GPSR_CSB] = STMPE24XX_REG_GPSR_CSB, [STMPE_IDX_GPSR_MSB] = STMPE24XX_REG_GPSR_MSB, [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB, [STMPE_IDX_GPCR_CSB] = STMPE24XX_REG_GPCR_CSB, [STMPE_IDX_GPCR_MSB] = STMPE24XX_REG_GPCR_MSB, [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB, [STMPE_IDX_GPDR_CSB] = STMPE24XX_REG_GPDR_CSB, [STMPE_IDX_GPDR_MSB] = STMPE24XX_REG_GPDR_MSB, [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB, [STMPE_IDX_GPRER_CSB] = STMPE24XX_REG_GPRER_CSB, [STMPE_IDX_GPRER_MSB] = STMPE24XX_REG_GPRER_MSB, [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB, [STMPE_IDX_GPFER_CSB] = STMPE24XX_REG_GPFER_CSB, [STMPE_IDX_GPFER_MSB] = STMPE24XX_REG_GPFER_MSB, [STMPE_IDX_GPPUR_LSB] = STMPE24XX_REG_GPPUR_LSB, [STMPE_IDX_GPPDR_LSB] = STMPE24XX_REG_GPPDR_LSB, [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB, [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB, [STMPE_IDX_IEGPIOR_CSB] = STMPE24XX_REG_IEGPIOR_CSB, [STMPE_IDX_IEGPIOR_MSB] = STMPE24XX_REG_IEGPIOR_MSB, [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB, [STMPE_IDX_GPEDR_LSB] = STMPE24XX_REG_GPEDR_LSB, [STMPE_IDX_GPEDR_CSB] = STMPE24XX_REG_GPEDR_CSB, [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB, }; static struct stmpe_variant_block stmpe24xx_blocks[] = { { .cell = &stmpe_gpio_cell, .irq = STMPE24XX_IRQ_GPIOC, .block = STMPE_BLOCK_GPIO, }, { .cell = &stmpe_keypad_cell, .irq = STMPE24XX_IRQ_KEYPAD, .block = STMPE_BLOCK_KEYPAD, }, { .cell = &stmpe_pwm_cell, .irq = STMPE24XX_IRQ_PWM0, .block = STMPE_BLOCK_PWM, }, }; static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks, bool enable) { unsigned int mask = 0; if (blocks & STMPE_BLOCK_GPIO) mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO; if (blocks & STMPE_BLOCK_KEYPAD) mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC; return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask, enable ? mask : 0); } static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) { switch (block) { case STMPE_BLOCK_ROTATOR: return 2; case STMPE_BLOCK_KEYPAD: case STMPE_BLOCK_PWM: return 1; case STMPE_BLOCK_GPIO: default: return 0; } } static struct stmpe_variant_info stmpe2401 = { .name = "stmpe2401", .id_val = 0x0101, .id_mask = 0xffff, .num_gpios = 24, .af_bits = 2, .regs = stmpe24xx_regs, .blocks = stmpe24xx_blocks, .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, .enable = stmpe24xx_enable, .get_altfunc = stmpe24xx_get_altfunc, }; static struct stmpe_variant_info stmpe2403 = { .name = "stmpe2403", .id_val = 0x0120, .id_mask = 0xffff, .num_gpios = 24, .af_bits = 2, .regs = stmpe24xx_regs, .blocks = stmpe24xx_blocks, .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, .enable = stmpe24xx_enable, .get_altfunc = stmpe24xx_get_altfunc, .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */ }; static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = { [STMPE610] = &stmpe610, [STMPE801] = &stmpe801, [STMPE811] = &stmpe811, [STMPE1600] = &stmpe1600, [STMPE1601] = &stmpe1601, [STMPE1801] = &stmpe1801, [STMPE2401] = &stmpe2401, [STMPE2403] = &stmpe2403, }; /* * These devices can be connected in a 'no-irq' configuration - the irq pin * is not used and the device cannot interrupt the CPU. Here we only list * devices which support this configuration - the driver will fail probing * for any devices not listed here which are configured in this way. */ static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = { [STMPE801] = &stmpe801_noirq, }; static irqreturn_t stmpe_irq(int irq, void *data) { struct stmpe *stmpe = data; struct stmpe_variant_info *variant = stmpe->variant; int num = DIV_ROUND_UP(variant->num_irqs, 8); u8 israddr; u8 isr[3]; int ret; int i; if (variant->id_val == STMPE801_ID || variant->id_val == STMPE1600_ID) { int base = irq_find_mapping(stmpe->domain, 0); handle_nested_irq(base); return IRQ_HANDLED; } if (variant->id_val == STMPE1801_ID) israddr = stmpe->regs[STMPE_IDX_ISR_LSB]; else israddr = stmpe->regs[STMPE_IDX_ISR_MSB]; ret = stmpe_block_read(stmpe, israddr, num, isr); if (ret < 0) return IRQ_NONE; for (i = 0; i < num; i++) { int bank = num - i - 1; u8 status = isr[i]; u8 clear; status &= stmpe->ier[bank]; if (!status) continue; clear = status; while (status) { int bit = __ffs(status); int line = bank * 8 + bit; int nestedirq = irq_find_mapping(stmpe->domain, line); handle_nested_irq(nestedirq); status &= ~(1 << bit); } stmpe_reg_write(stmpe, israddr + i, clear); } return IRQ_HANDLED; } static void stmpe_irq_lock(struct irq_data *data) { struct stmpe *stmpe = irq_data_get_irq_chip_data(data); mutex_lock(&stmpe->irq_lock); } static void stmpe_irq_sync_unlock(struct irq_data *data) { struct stmpe *stmpe = irq_data_get_irq_chip_data(data); struct stmpe_variant_info *variant = stmpe->variant; int num = DIV_ROUND_UP(variant->num_irqs, 8); int i; for (i = 0; i < num; i++) { u8 new = stmpe->ier[i]; u8 old = stmpe->oldier[i]; if (new == old) continue; stmpe->oldier[i] = new; stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB + i], new); } mutex_unlock(&stmpe->irq_lock); } static void stmpe_irq_mask(struct irq_data *data) { struct stmpe *stmpe = irq_data_get_irq_chip_data(data); int offset = data->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); stmpe->ier[regoffset] &= ~mask; } static void stmpe_irq_unmask(struct irq_data *data) { struct stmpe *stmpe = irq_data_get_irq_chip_data(data); int offset = data->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); stmpe->ier[regoffset] |= mask; } static struct irq_chip stmpe_irq_chip = { .name = "stmpe", .irq_bus_lock = stmpe_irq_lock, .irq_bus_sync_unlock = stmpe_irq_sync_unlock, .irq_mask = stmpe_irq_mask, .irq_unmask = stmpe_irq_unmask, }; static int stmpe_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq) { struct stmpe *stmpe = d->host_data; struct irq_chip *chip = NULL; if (stmpe->variant->id_val != STMPE801_ID) chip = &stmpe_irq_chip; irq_set_chip_data(virq, stmpe); irq_set_chip_and_handler(virq, chip, handle_edge_irq); irq_set_nested_thread(virq, 1); irq_set_noprobe(virq); return 0; } static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq) { irq_set_chip_and_handler(virq, NULL, NULL); irq_set_chip_data(virq, NULL); } static const struct irq_domain_ops stmpe_irq_ops = { .map = stmpe_irq_map, .unmap = stmpe_irq_unmap, .xlate = irq_domain_xlate_twocell, }; static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np) { int base = 0; int num_irqs = stmpe->variant->num_irqs; stmpe->domain = irq_domain_add_simple(np, num_irqs, base, &stmpe_irq_ops, stmpe); if (!stmpe->domain) { dev_err(stmpe->dev, "Failed to create irqdomain\n"); return -ENOSYS; } return 0; } static int stmpe_chip_init(struct stmpe *stmpe) { unsigned int irq_trigger = stmpe->pdata->irq_trigger; int autosleep_timeout = stmpe->pdata->autosleep_timeout; struct stmpe_variant_info *variant = stmpe->variant; u8 icr = 0; unsigned int id; u8 data[2]; int ret; ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID], ARRAY_SIZE(data), data); if (ret < 0) return ret; id = (data[0] << 8) | data[1]; if ((id & variant->id_mask) != variant->id_val) { dev_err(stmpe->dev, "unknown chip id: %#x\n", id); return -EINVAL; } dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id); /* Disable all modules -- subdrivers should enable what they need. */ ret = stmpe_disable(stmpe, ~0); if (ret) return ret; ret = stmpe_reset(stmpe); if (ret < 0) return ret; if (stmpe->irq >= 0) { if (id == STMPE801_ID || id == STMPE1600_ID) icr = STMPE_SYS_CTRL_INT_EN; else icr = STMPE_ICR_LSB_GIM; /* STMPE801 and STMPE1600 don't support Edge interrupts */ if (id != STMPE801_ID && id != STMPE1600_ID) { if (irq_trigger == IRQF_TRIGGER_FALLING || irq_trigger == IRQF_TRIGGER_RISING) icr |= STMPE_ICR_LSB_EDGE; } if (irq_trigger == IRQF_TRIGGER_RISING || irq_trigger == IRQF_TRIGGER_HIGH) { if (id == STMPE801_ID || id == STMPE1600_ID) icr |= STMPE_SYS_CTRL_INT_HI; else icr |= STMPE_ICR_LSB_HIGH; } } if (stmpe->pdata->autosleep) { ret = stmpe_autosleep(stmpe, autosleep_timeout); if (ret) return ret; } return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr); } static int stmpe_add_device(struct stmpe *stmpe, const struct mfd_cell *cell) { return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1, NULL, 0, stmpe->domain); } static int stmpe_devices_init(struct stmpe *stmpe) { struct stmpe_variant_info *variant = stmpe->variant; unsigned int platform_blocks = stmpe->pdata->blocks; int ret = -EINVAL; int i, j; for (i = 0; i < variant->num_blocks; i++) { struct stmpe_variant_block *block = &variant->blocks[i]; if (!(platform_blocks & block->block)) continue; for (j = 0; j < block->cell->num_resources; j++) { struct resource *res = (struct resource *) &block->cell->resources[j]; /* Dynamically fill in a variant's IRQ. */ if (res->flags & IORESOURCE_IRQ) res->start = res->end = block->irq + j; } platform_blocks &= ~block->block; ret = stmpe_add_device(stmpe, block->cell); if (ret) return ret; } if (platform_blocks) dev_warn(stmpe->dev, "platform wants blocks (%#x) not present on variant", platform_blocks); return ret; } static void stmpe_of_probe(struct stmpe_platform_data *pdata, struct device_node *np) { struct device_node *child; pdata->id = of_alias_get_id(np, "stmpe-i2c"); if (pdata->id < 0) pdata->id = -1; of_property_read_u32(np, "st,autosleep-timeout", &pdata->autosleep_timeout); pdata->autosleep = (pdata->autosleep_timeout) ? true : false; for_each_available_child_of_node(np, child) { if (of_device_is_compatible(child, stmpe_gpio_cell.of_compatible)) pdata->blocks |= STMPE_BLOCK_GPIO; else if (of_device_is_compatible(child, stmpe_keypad_cell.of_compatible)) pdata->blocks |= STMPE_BLOCK_KEYPAD; else if (of_device_is_compatible(child, stmpe_ts_cell.of_compatible)) pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN; else if (of_device_is_compatible(child, stmpe_adc_cell.of_compatible)) pdata->blocks |= STMPE_BLOCK_ADC; else if (of_device_is_compatible(child, stmpe_pwm_cell.of_compatible)) pdata->blocks |= STMPE_BLOCK_PWM; } } /* Called from client specific probe routines */ int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum) { struct stmpe_platform_data *pdata; struct device_node *np = ci->dev->of_node; struct stmpe *stmpe; struct gpio_desc *irq_gpio; int ret; u32 val; pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; stmpe_of_probe(pdata, np); if (!of_property_present(np, "interrupts")) ci->irq = -1; stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL); if (!stmpe) return -ENOMEM; mutex_init(&stmpe->irq_lock); mutex_init(&stmpe->lock); if (!of_property_read_u32(np, "st,sample-time", &val)) stmpe->sample_time = val; if (!of_property_read_u32(np, "st,mod-12b", &val)) stmpe->mod_12b = val; if (!of_property_read_u32(np, "st,ref-sel", &val)) stmpe->ref_sel = val; if (!of_property_read_u32(np, "st,adc-freq", &val)) stmpe->adc_freq = val; stmpe->dev = ci->dev; stmpe->client = ci->client; stmpe->pdata = pdata; stmpe->ci = ci; stmpe->partnum = partnum; stmpe->variant = stmpe_variant_info[partnum]; stmpe->regs = stmpe->variant->regs; stmpe->num_gpios = stmpe->variant->num_gpios; stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc"); if (!IS_ERR(stmpe->vcc)) { ret = regulator_enable(stmpe->vcc); if (ret) dev_warn(ci->dev, "failed to enable VCC supply\n"); } stmpe->vio = devm_regulator_get_optional(ci->dev, "vio"); if (!IS_ERR(stmpe->vio)) { ret = regulator_enable(stmpe->vio); if (ret) dev_warn(ci->dev, "failed to enable VIO supply\n"); } dev_set_drvdata(stmpe->dev, stmpe); if (ci->init) ci->init(stmpe); irq_gpio = devm_gpiod_get_optional(ci->dev, "irq", GPIOD_ASIS); ret = PTR_ERR_OR_ZERO(irq_gpio); if (ret) { dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", ret); return ret; } if (irq_gpio) { stmpe->irq = gpiod_to_irq(irq_gpio); pdata->irq_trigger = gpiod_is_active_low(irq_gpio) ? IRQF_TRIGGER_LOW : IRQF_TRIGGER_HIGH; } else { stmpe->irq = ci->irq; pdata->irq_trigger = IRQF_TRIGGER_NONE; } if (stmpe->irq < 0) { /* use alternate variant info for no-irq mode, if supported */ dev_info(stmpe->dev, "%s configured in no-irq mode by platform data\n", stmpe->variant->name); if (!stmpe_noirq_variant_info[stmpe->partnum]) { dev_err(stmpe->dev, "%s does not support no-irq mode!\n", stmpe->variant->name); return -ENODEV; } stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum]; } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) { pdata->irq_trigger = irq_get_trigger_type(stmpe->irq); } ret = stmpe_chip_init(stmpe); if (ret) return ret; if (stmpe->irq >= 0) { ret = stmpe_irq_init(stmpe, np); if (ret) return ret; ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL, stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT, "stmpe", stmpe); if (ret) { dev_err(stmpe->dev, "failed to request IRQ: %d\n", ret); return ret; } } ret = stmpe_devices_init(stmpe); if (!ret) return 0; dev_err(stmpe->dev, "failed to add children\n"); mfd_remove_devices(stmpe->dev); return ret; } void stmpe_remove(struct stmpe *stmpe) { if (!IS_ERR(stmpe->vio) && regulator_is_enabled(stmpe->vio)) regulator_disable(stmpe->vio); if (!IS_ERR(stmpe->vcc) && regulator_is_enabled(stmpe->vcc)) regulator_disable(stmpe->vcc); __stmpe_disable(stmpe, STMPE_BLOCK_ADC); mfd_remove_devices(stmpe->dev); } static int stmpe_suspend(struct device *dev) { struct stmpe *stmpe = dev_get_drvdata(dev); if (stmpe->irq >= 0 && device_may_wakeup(dev)) enable_irq_wake(stmpe->irq); return 0; } static int stmpe_resume(struct device *dev) { struct stmpe *stmpe = dev_get_drvdata(dev); if (stmpe->irq >= 0 && device_may_wakeup(dev)) disable_irq_wake(stmpe->irq); return 0; } EXPORT_GPL_SIMPLE_DEV_PM_OPS(stmpe_dev_pm_ops, stmpe_suspend, stmpe_resume);
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1