diff options
Diffstat (limited to 'drivers/input/touchscreen/hideep.c')
| -rw-r--r-- | drivers/input/touchscreen/hideep.c | 67 |
1 files changed, 40 insertions, 27 deletions
diff --git a/drivers/input/touchscreen/hideep.c b/drivers/input/touchscreen/hideep.c index e9547ee29756..a73369e15dda 100644 --- a/drivers/input/touchscreen/hideep.c +++ b/drivers/input/touchscreen/hideep.c @@ -17,7 +17,7 @@ #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/regulator/consumer.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> #define HIDEEP_TS_NAME "HiDeep Touchscreen" #define HIDEEP_I2C_NAME "hideep_ts" @@ -35,6 +35,7 @@ #define HIDEEP_EVENT_ADDR 0x240 /* command list */ +#define HIDEEP_WORK_MODE 0x081e #define HIDEEP_RESET_CMD 0x9800 /* event bit */ @@ -271,9 +272,14 @@ static int hideep_pgm_w_reg(struct hideep_ts *ts, u32 addr, u32 val) #define SW_RESET_IN_PGM(clk) \ { \ + __be32 data = cpu_to_be32(0x01); \ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CNT, (clk)); \ hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x03); \ - hideep_pgm_w_reg(ts, HIDEEP_SYSCON_WDT_CON, 0x01); \ + /* \ + * The first write may already cause a reset, use a raw \ + * write for the second write to avoid error logging. \ + */ \ + hideep_pgm_w_mem(ts, HIDEEP_SYSCON_WDT_CON, &data, 1); \ } #define SET_FLASH_PIO(ce) \ @@ -467,9 +473,9 @@ static int hideep_program_nvm(struct hideep_ts *ts, u32 addr = 0; int error; - error = hideep_nvm_unlock(ts); - if (error) - return error; + error = hideep_nvm_unlock(ts); + if (error) + return error; while (ucode_len > 0) { xfer_len = min_t(size_t, ucode_len, HIDEEP_NVM_PAGE_SIZE); @@ -922,8 +928,7 @@ static ssize_t hideep_fw_version_show(struct device *dev, ssize_t len; mutex_lock(&ts->dev_mutex); - len = scnprintf(buf, PAGE_SIZE, "%04x\n", - be16_to_cpu(ts->dwz_info.release_ver)); + len = sysfs_emit(buf, "%04x\n", be16_to_cpu(ts->dwz_info.release_ver)); mutex_unlock(&ts->dev_mutex); return len; @@ -937,8 +942,7 @@ static ssize_t hideep_product_id_show(struct device *dev, ssize_t len; mutex_lock(&ts->dev_mutex); - len = scnprintf(buf, PAGE_SIZE, "%04x\n", - be16_to_cpu(ts->dwz_info.product_id)); + len = sysfs_emit(buf, "%04x\n", be16_to_cpu(ts->dwz_info.product_id)); mutex_unlock(&ts->dev_mutex); return len; @@ -948,18 +952,30 @@ static DEVICE_ATTR(version, 0664, hideep_fw_version_show, NULL); static DEVICE_ATTR(product_id, 0664, hideep_product_id_show, NULL); static DEVICE_ATTR(update_fw, 0664, NULL, hideep_update_fw); -static struct attribute *hideep_ts_sysfs_entries[] = { +static struct attribute *hideep_ts_attrs[] = { &dev_attr_version.attr, &dev_attr_product_id.attr, &dev_attr_update_fw.attr, NULL, }; +ATTRIBUTE_GROUPS(hideep_ts); -static const struct attribute_group hideep_ts_attr_group = { - .attrs = hideep_ts_sysfs_entries, -}; +static void hideep_set_work_mode(struct hideep_ts *ts) +{ + /* + * Reset touch report format to the native HiDeep 20 protocol if requested. + * This is necessary to make touchscreens which come up in I2C-HID mode + * work with this driver. + * + * Note this is a kernel internal device-property set by x86 platform code, + * this MUST not be used in devicetree files without first adding it to + * the DT bindings. + */ + if (device_property_read_bool(&ts->client->dev, "hideep,force-native-protocol")) + regmap_write(ts->reg, HIDEEP_WORK_MODE, 0x00); +} -static int __maybe_unused hideep_suspend(struct device *dev) +static int hideep_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct hideep_ts *ts = i2c_get_clientdata(client); @@ -970,7 +986,7 @@ static int __maybe_unused hideep_suspend(struct device *dev) return 0; } -static int __maybe_unused hideep_resume(struct device *dev) +static int hideep_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct hideep_ts *ts = i2c_get_clientdata(client); @@ -982,12 +998,14 @@ static int __maybe_unused hideep_resume(struct device *dev) return error; } + hideep_set_work_mode(ts); + enable_irq(client->irq); return 0; } -static SIMPLE_DEV_PM_OPS(hideep_pm_ops, hideep_suspend, hideep_resume); +static DEFINE_SIMPLE_DEV_PM_OPS(hideep_pm_ops, hideep_suspend, hideep_resume); static const struct regmap_config hideep_regmap_config = { .reg_bits = 16, @@ -997,8 +1015,7 @@ static const struct regmap_config hideep_regmap_config = { .max_register = 0xffff, }; -static int hideep_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int hideep_probe(struct i2c_client *client) { struct hideep_ts *ts; int error; @@ -1059,6 +1076,8 @@ static int hideep_probe(struct i2c_client *client, return error; } + hideep_set_work_mode(ts); + error = hideep_init_input(ts); if (error) return error; @@ -1072,18 +1091,11 @@ static int hideep_probe(struct i2c_client *client, return error; } - error = devm_device_add_group(&client->dev, &hideep_ts_attr_group); - if (error) { - dev_err(&client->dev, - "failed to add sysfs attributes: %d\n", error); - return error; - } - return 0; } static const struct i2c_device_id hideep_i2c_id[] = { - { HIDEEP_I2C_NAME, 0 }, + { HIDEEP_I2C_NAME }, { } }; MODULE_DEVICE_TABLE(i2c, hideep_i2c_id); @@ -1107,9 +1119,10 @@ MODULE_DEVICE_TABLE(of, hideep_match_table); static struct i2c_driver hideep_driver = { .driver = { .name = HIDEEP_I2C_NAME, + .dev_groups = hideep_ts_groups, .of_match_table = of_match_ptr(hideep_match_table), .acpi_match_table = ACPI_PTR(hideep_acpi_id), - .pm = &hideep_pm_ops, + .pm = pm_sleep_ptr(&hideep_pm_ops), }, .id_table = hideep_i2c_id, .probe = hideep_probe, |