From 3997fb74846f35d0364c5e88e54bc9b166d5a1bc Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Sun, 20 Aug 2017 21:06:00 +0200 Subject: i2c: mux: reg: use of_property_read_bool() Use more compact of_property_read_bool() calls for the boolean properties instead of of_find_property() calls in i2c_mux_reg_probe_dt(). Signed-off-by: Sergei Shtylyov Signed-off-by: Peter Rosin --- drivers/i2c/muxes/i2c-mux-reg.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'drivers/i2c/muxes') diff --git a/drivers/i2c/muxes/i2c-mux-reg.c b/drivers/i2c/muxes/i2c-mux-reg.c index d97031804de8..f6c9c3dc6cad 100644 --- a/drivers/i2c/muxes/i2c-mux-reg.c +++ b/drivers/i2c/muxes/i2c-mux-reg.c @@ -107,9 +107,9 @@ static int i2c_mux_reg_probe_dt(struct regmux *mux, put_device(&adapter->dev); mux->data.n_values = of_get_child_count(np); - if (of_find_property(np, "little-endian", NULL)) { + if (of_property_read_bool(np, "little-endian")) { mux->data.little_endian = true; - } else if (of_find_property(np, "big-endian", NULL)) { + } else if (of_property_read_bool(np, "big-endian")) { mux->data.little_endian = false; } else { #if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : \ @@ -122,10 +122,7 @@ static int i2c_mux_reg_probe_dt(struct regmux *mux, #error Endianness not defined? #endif } - if (of_find_property(np, "write-only", NULL)) - mux->data.write_only = true; - else - mux->data.write_only = false; + mux->data.write_only = of_property_read_bool(np, "write-only"); values = devm_kzalloc(&pdev->dev, sizeof(*mux->data.values) * mux->data.n_values, -- cgit v1.2.3 From 148baf1ddfb65019ee510ba2a76c2e7cd9752982 Mon Sep 17 00:00:00 2001 From: Phil Reid Date: Thu, 24 Aug 2017 17:31:05 +0800 Subject: i2c: mux: pca954x: call request irq after adding mux segments The pca954x device do not have the ability to mask interrupts. For i2c slave devices that also don't have masking ability (eg ltc1760 smbalert output) delay registering the irq until after the mux segments have been configured. During the mux add_adaptor call the core i2c system can register an smbalert handler which would then be called immediately when the irq is registered. This smbalert handler will then clear the pending irq. This removes the need for the irq_mask / irq_unmask calls that were original used to do this. Signed-off-by: Phil Reid Acked-by: Peter Rosin Signed-off-by: Wolfram Sang --- drivers/i2c/muxes/i2c-mux-pca954x.c | 91 ++++++++++++------------------------- 1 file changed, 28 insertions(+), 63 deletions(-) (limited to 'drivers/i2c/muxes') diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c index 7b992db38021..14aee65298f7 100644 --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -246,36 +246,6 @@ static irqreturn_t pca954x_irq_handler(int irq, void *dev_id) return handled ? IRQ_HANDLED : IRQ_NONE; } -static void pca954x_irq_mask(struct irq_data *idata) -{ - struct pca954x *data = irq_data_get_irq_chip_data(idata); - unsigned int pos = idata->hwirq; - unsigned long flags; - - raw_spin_lock_irqsave(&data->lock, flags); - - data->irq_mask &= ~BIT(pos); - if (!data->irq_mask) - disable_irq(data->client->irq); - - raw_spin_unlock_irqrestore(&data->lock, flags); -} - -static void pca954x_irq_unmask(struct irq_data *idata) -{ - struct pca954x *data = irq_data_get_irq_chip_data(idata); - unsigned int pos = idata->hwirq; - unsigned long flags; - - raw_spin_lock_irqsave(&data->lock, flags); - - if (!data->irq_mask) - enable_irq(data->client->irq); - data->irq_mask |= BIT(pos); - - raw_spin_unlock_irqrestore(&data->lock, flags); -} - static int pca954x_irq_set_type(struct irq_data *idata, unsigned int type) { if ((type & IRQ_TYPE_SENSE_MASK) != IRQ_TYPE_LEVEL_LOW) @@ -285,8 +255,6 @@ static int pca954x_irq_set_type(struct irq_data *idata, unsigned int type) static struct irq_chip pca954x_irq_chip = { .name = "i2c-mux-pca954x", - .irq_mask = pca954x_irq_mask, - .irq_unmask = pca954x_irq_unmask, .irq_set_type = pca954x_irq_set_type, }; @@ -294,7 +262,7 @@ static int pca954x_irq_setup(struct i2c_mux_core *muxc) { struct pca954x *data = i2c_mux_priv(muxc); struct i2c_client *client = data->client; - int c, err, irq; + int c, irq; if (!data->chip->has_irq || client->irq <= 0) return 0; @@ -314,24 +282,22 @@ static int pca954x_irq_setup(struct i2c_mux_core *muxc) handle_simple_irq); } - err = devm_request_threaded_irq(&client->dev, data->client->irq, NULL, - pca954x_irq_handler, - IRQF_ONESHOT | IRQF_SHARED, - "pca954x", data); - if (err) - goto err_req_irq; + return 0; +} - disable_irq(data->client->irq); +static void pca954x_cleanup(struct i2c_mux_core *muxc) +{ + struct pca954x *data = i2c_mux_priv(muxc); + int c, irq; - return 0; -err_req_irq: - for (c = 0; c < data->chip->nchans; c++) { - irq = irq_find_mapping(data->irq, c); - irq_dispose_mapping(irq); + if (data->irq) { + for (c = 0; c < data->chip->nchans; c++) { + irq = irq_find_mapping(data->irq, c); + irq_dispose_mapping(irq); + } + irq_domain_remove(data->irq); } - irq_domain_remove(data->irq); - - return err; + i2c_mux_del_adapters(muxc); } /* @@ -391,7 +357,7 @@ static int pca954x_probe(struct i2c_client *client, ret = pca954x_irq_setup(muxc); if (ret) - goto fail_del_adapters; + goto fail_cleanup; /* Now create an adapter for each channel */ for (num = 0; num < data->chip->nchans; num++) { @@ -414,7 +380,16 @@ static int pca954x_probe(struct i2c_client *client, ret = i2c_mux_add_adapter(muxc, force, num, class); if (ret) - goto fail_del_adapters; + goto fail_cleanup; + } + + if (data->irq) { + ret = devm_request_threaded_irq(&client->dev, data->client->irq, + NULL, pca954x_irq_handler, + IRQF_ONESHOT | IRQF_SHARED, + "pca954x", data); + if (ret) + goto fail_cleanup; } dev_info(&client->dev, @@ -424,26 +399,16 @@ static int pca954x_probe(struct i2c_client *client, return 0; -fail_del_adapters: - i2c_mux_del_adapters(muxc); +fail_cleanup: + pca954x_cleanup(muxc); return ret; } static int pca954x_remove(struct i2c_client *client) { struct i2c_mux_core *muxc = i2c_get_clientdata(client); - struct pca954x *data = i2c_mux_priv(muxc); - int c, irq; - if (data->irq) { - for (c = 0; c < data->chip->nchans; c++) { - irq = irq_find_mapping(data->irq, c); - irq_dispose_mapping(irq); - } - irq_domain_remove(data->irq); - } - - i2c_mux_del_adapters(muxc); + pca954x_cleanup(muxc); return 0; } -- cgit v1.2.3 From e460617e85db8af533c9f70c9ab94d4fa111b379 Mon Sep 17 00:00:00 2001 From: Phil Reid Date: Thu, 24 Aug 2017 17:31:06 +0800 Subject: i2c: mux: pca954x: Return error if irq_create_mapping fails irq_create_mapping can return an error, report error to log and return. Cleanup will occur in the probe function when an error is returned. Suggested-by: Peter Rosin Acked-by: Peter Rosin Signed-off-by: Phil Reid Signed-off-by: Wolfram Sang --- drivers/i2c/muxes/i2c-mux-pca954x.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/i2c/muxes') diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c index 14aee65298f7..2ca068d8b92d 100644 --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -277,6 +277,10 @@ static int pca954x_irq_setup(struct i2c_mux_core *muxc) for (c = 0; c < data->chip->nchans; c++) { irq = irq_create_mapping(data->irq, c); + if (!irq) { + dev_err(&client->dev, "failed irq create map\n"); + return -EINVAL; + } irq_set_chip_data(irq, data); irq_set_chip_and_handler(irq, &pca954x_irq_chip, handle_simple_irq); -- cgit v1.2.3