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Date: Wed, 12 Mar 2014 16:11:46 +0100
From: Krzysztof Kozlowski <k.kozlowski@...sung.com>
To: Robert Baldyga <r.baldyga@...sung.com>
Cc: sameo@...ux.intel.com, lee.jones@...aro.org,
myungjoo.ham@...sung.com, cw00.choi@...sung.com,
dmitry.torokhov@...il.com, cooloney@...il.com, rpurdie@...ys.net,
dbaryshkov@...il.com, dwmw2@...radead.org, lgirdwood@...il.com,
broonie@...nel.org, a.zummo@...ertech.it,
paul.gortmaker@...driver.com, linux-kernel@...r.kernel.org,
linux-input@...r.kernel.org, linux-leds@...r.kernel.org,
rtc-linux@...glegroups.com, m.szyprowski@...sung.com
Subject: Re: [PATCH v2 3/3] mfd: max8997: move regmap handling to function
drivers
On Wed, 2014-03-12 at 14:37 +0100, Robert Baldyga wrote:
> This patch moves code creating new i2c clients and regmaps to function
> drivers which use them. It allows to avoid creating this instances when
> individual function drivers are not enabled.
>
> Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
>
> Conflicts:
>
> drivers/mfd/max8997.c
You can strip out the conflict from commit message.
> ---
> drivers/extcon/extcon-max8997.c | 131 +++++++++++++++++++++++++--
> drivers/input/misc/max8997_haptic.c | 117 +++++++++++++++++++-----
> drivers/mfd/max8997.c | 167 -----------------------------------
> drivers/rtc/rtc-max8997.c | 78 +++++++++++-----
> include/linux/mfd/max8997-private.h | 14 +--
> 5 files changed, 283 insertions(+), 224 deletions(-)
>
> diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
> index 15fc5c0..42c9915 100644
> --- a/drivers/extcon/extcon-max8997.c
> +++ b/drivers/extcon/extcon-max8997.c
> @@ -118,6 +118,9 @@ enum max8997_muic_charger_type {
> struct max8997_muic_info {
> struct device *dev;
> struct max8997_dev *max8997;
> + struct i2c_client *i2c;
> + struct regmap *regmap;
> + struct regmap_irq_chip_data *irq_data;
> struct extcon_dev *edev;
> int prev_cable_type;
> int prev_chg_type;
> @@ -144,6 +147,39 @@ struct max8997_muic_info {
> */
> int path_usb;
> int path_uart;
> +
> + unsigned int reg_dump[MAX8997_MUIC_REG_END];
> +};
> +
> +static const struct regmap_config max8997_muic_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> + .max_register = MAX8997_MUIC_REG_END,
> +};
> +
> +static const struct regmap_irq max8997_irqs_muic[] = {
> + /* MUIC_INT1 interrupts */
> + { .reg_offset = 0, .mask = MUIC_INT1_ADC_MASK, },
> + { .reg_offset = 0, .mask = MUIC_INT1_ADCLOW_MASK, },
> + { .reg_offset = 0, .mask = MUIC_INT1_ADCERROR_MASK, },
> + /* MUIC_INT2 interrupts */
> + { .reg_offset = 1, .mask = MUIC_INT2_CHGTYP_MASK, },
> + { .reg_offset = 1, .mask = MUIC_INT2_CHGDETRUN_MASK, },
> + { .reg_offset = 1, .mask = MUIC_INT2_DCDTMR_MASK, },
> + { .reg_offset = 1, .mask = MUIC_INT2_DBCHG_MASK, },
> + { .reg_offset = 1, .mask = MUIC_INT2_VBVOLT_MASK, },
> + /* MUIC_INT3 interrupts */
> + { .reg_offset = 2, .mask = MUIC_INT3_OVP_MASK, },
> +};
> +
> +static const struct regmap_irq_chip max8997_muic_irq_chip = {
> + .name = "max8997-muic",
> + .status_base = MAX8997_MUIC_REG_INT1,
> + .mask_base = MAX8997_MUIC_REG_INTMASK1,
> + .mask_invert = true,
> + .num_regs = 3,
> + .irqs = max8997_irqs_muic,
> + .num_irqs = ARRAY_SIZE(max8997_irqs_muic),
> };
>
> enum {
> @@ -191,7 +227,7 @@ static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
> case ADC_DEBOUNCE_TIME_10MS:
> case ADC_DEBOUNCE_TIME_25MS:
> case ADC_DEBOUNCE_TIME_38_62MS:
> - ret = regmap_update_bits(info->max8997->regmap_muic,
> + ret = regmap_update_bits(info->regmap,
> MAX8997_MUIC_REG_CONTROL3,
> CONTROL3_ADCDBSET_MASK,
> time << CONTROL3_ADCDBSET_SHIFT);
> @@ -229,7 +265,7 @@ static int max8997_muic_set_path(struct max8997_muic_info *info,
> else
> ctrl1 = CONTROL1_SW_OPEN;
>
> - ret = regmap_update_bits(info->max8997->regmap_muic,
> + ret = regmap_update_bits(info->regmap,
> MAX8997_MUIC_REG_CONTROL1, COMP_SW_MASK, ctrl1);
> if (ret < 0) {
> dev_err(info->dev, "failed to update MUIC register\n");
> @@ -241,7 +277,7 @@ static int max8997_muic_set_path(struct max8997_muic_info *info,
> else
> ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
>
> - ret = regmap_update_bits(info->max8997->regmap_muic,
> + ret = regmap_update_bits(info->regmap,
> MAX8997_MUIC_REG_CONTROL2,
> CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
> if (ret < 0) {
> @@ -544,7 +580,7 @@ static void max8997_muic_irq_work(struct work_struct *work)
> if (info->irq == muic_irqs[i].virq)
> irq_type = muic_irqs[i].irq;
>
> - ret = regmap_bulk_read(info->max8997->regmap_muic,
> + ret = regmap_bulk_read(info->regmap,
> MAX8997_MUIC_REG_STATUS1, info->status, 2);
> if (ret) {
> dev_err(info->dev, "failed to read muic register\n");
> @@ -606,7 +642,7 @@ static int max8997_muic_detect_dev(struct max8997_muic_info *info)
> mutex_lock(&info->mutex);
>
> /* Read STATUSx register to detect accessory */
> - ret = regmap_bulk_read(info->max8997->regmap_muic,
> + ret = regmap_bulk_read(info->regmap,
> MAX8997_MUIC_REG_STATUS1, info->status, 2);
> if (ret) {
> dev_err(info->dev, "failed to read MUIC register\n");
> @@ -670,6 +706,31 @@ static int max8997_muic_probe(struct platform_device *pdev)
> info->dev = &pdev->dev;
> info->max8997 = max8997;
>
> + info->i2c = i2c_new_dummy(max8997->i2c->adapter, MAX8997_I2C_ADDR_MUIC);
> + if (!info->i2c) {
> + dev_err(info->dev, "failed to allocate I2C device\n");
> + return -ENODEV;
> + }
> +
> + info->regmap = devm_regmap_init_i2c(info->i2c,
> + &max8997_muic_regmap_config);
> + if (IS_ERR(info->regmap)) {
> + ret = PTR_ERR(info->regmap);
> + dev_err(info->dev,
> + "failed to allocate register map: %d\n", ret);
> + goto err_regmap;
> + }
> +
> + ret = regmap_add_irq_chip(info->regmap, max8997->irq,
> + IRQF_ONESHOT | IRQF_SHARED |
> + IRQF_TRIGGER_FALLING, 0,
> + &max8997_muic_irq_chip,
> + &info->irq_data);
> + if (ret) {
> + dev_err(info->dev, "failed to add irq chip: %d\n", ret);
> + goto err_regmap_irq;
> + }
Same issue as in patch 2/3 - regmap_del_irq_chip() shouldn't be called
when add fails.
> +
> platform_set_drvdata(pdev, info);
> mutex_init(&info->mutex);
>
> @@ -679,8 +740,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
> struct max8997_muic_irq *muic_irq = &muic_irqs[i];
> unsigned int virq = 0;
>
> - virq = regmap_irq_get_virq(max8997->irq_data_muic,
> - muic_irq->irq);
> + virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
> if (!virq) {
> ret = -EINVAL;
> goto err_irq;
> @@ -723,7 +783,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
>
> /* Initialize registers according to platform data */
> for (i = 0; i < muic_pdata->num_init_data; i++) {
> - regmap_write(info->max8997->regmap_muic,
> + regmap_write(info->regmap,
> muic_pdata->init_data[i].addr,
> muic_pdata->init_data[i].data);
> }
> @@ -779,6 +839,10 @@ static int max8997_muic_probe(struct platform_device *pdev)
> err_irq:
> while (--i >= 0)
> free_irq(muic_irqs[i].virq, info);
> +err_regmap_irq:
> + regmap_del_irq_chip(info->max8997->irq, info->irq_data);
> +err_regmap:
> + i2c_unregister_device(info->i2c);
> return ret;
> }
>
> @@ -787,6 +851,8 @@ static int max8997_muic_remove(struct platform_device *pdev)
> struct max8997_muic_info *info = platform_get_drvdata(pdev);
> int i;
>
> + regmap_del_irq_chip(info->max8997->irq, info->irq_data);
> +
> for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
> free_irq(muic_irqs[i].virq, info);
I think the order should be different: first free_irq() then
regmap_del_irq_chip(). At least this is logically expected as the
virtual irqs aren't useful without irq_chip.
Best regards,
Krzysztof
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