From: Mark Zhang <markz@nvidia.com> To: lee.jones@linaro.org, blaws05@gmail.com, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linux-tegra@vger.kernel.org, Mark Zhang <markz@nvidia.com>, Laxman Dewangan <ldewangan@nvidia.com>, Venkat Reddy Talla <vreddytalla@nvidia.com> Subject: [PATCH v2 1/4] mfd: max77620: Add backup battery charger support Date: Tue, 29 Jan 2019 16:55:28 +0800 [thread overview] Message-ID: <20190129085531.32364-2-markz@nvidia.com> (raw) In-Reply-To: <20190129085531.32364-1-markz@nvidia.com> Add PMIC configurations for backup battery charger, which is a constant voltage and constant current style charger with a series output resistance. The max77620 register CNFGBBC(addr: 0x04) defines the parameters of backup battery charger. This patch adds support for it. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com> Signed-off-by: Mark Zhang <markz@nvidia.com> --- drivers/mfd/max77620.c | 80 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index d8ddd1a6f304..f58143103185 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -398,6 +398,82 @@ static int max77620_initialise_fps(struct max77620_chip *chip) return 0; } +static int max77620_init_backup_battery_charging(struct max77620_chip *chip) +{ + struct device *dev = chip->dev; + struct device_node *np; + u32 pval; + u8 config; + int charging_current; + int charging_voltage; + int resistor; + int ret; + + np = of_get_child_by_name(dev->of_node, "backup-battery"); + if (!np) { + dev_info(dev, "Backup battery charging support disabled\n"); + ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGBBC, + MAX77620_CNFGBBC_ENABLE, 0); + if (ret < 0) + dev_err(dev, "Failed to update CNFGBBC: %d\n", ret); + return ret; + } + + ret = of_property_read_u32(np, + "maxim,backup-battery-charging-current", &pval); + charging_current = (!ret) ? pval : 50; + + ret = of_property_read_u32(np, + "maxim,backup-battery-charging-voltage", &pval); + charging_voltage = (!ret) ? pval : 2500000; + charging_voltage /= 1000; + + ret = of_property_read_u32(np, + "maxim,backup-battery-output-resister", &pval); + resistor = (!ret) ? pval : 1000; + + config = MAX77620_CNFGBBC_ENABLE; + if (charging_current <= 50) + config |= 0 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 100) + config |= 3 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 200) + config |= 0 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 400) + config |= 3 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 600) + config |= 1 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else + config |= 2 << MAX77620_CNFGBBC_CURRENT_SHIFT; + + if (charging_current > 100) + config |= MAX77620_CNFGBBC_LOW_CURRENT_DISABLE; + + if (charging_voltage <= 2500) + config |= 0 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + else if (charging_voltage <= 3000) + config |= 1 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + else if (charging_voltage <= 3300) + config |= 2 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + else + config |= 3 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + + if (resistor <= 100) + config |= 0 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + else if (resistor <= 1000) + config |= 1 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + else if (resistor <= 3000) + config |= 2 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + else if (resistor <= 6000) + config |= 3 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + + ret = regmap_write(chip->rmap, MAX77620_REG_CNFGBBC, config); + if (ret < 0) + dev_err(dev, "Reg 0x%02x write failed, %d\n", + MAX77620_REG_CNFGBBC, ret); + return ret; +} + static int max77620_read_es_version(struct max77620_chip *chip) { unsigned int val; @@ -483,6 +559,10 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; + ret = max77620_init_backup_battery_charging(chip); + if (ret < 0) + return ret; + ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, mfd_cells, n_mfd_cells, NULL, 0, regmap_irq_get_domain(chip->top_irq_data)); -- 2.19.2
WARNING: multiple messages have this Message-ID (diff)
From: Mark Zhang <markz@nvidia.com> To: <lee.jones@linaro.org>, <blaws05@gmail.com>, <robh+dt@kernel.org>, <mark.rutland@arm.com>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org> Cc: <linux-tegra@vger.kernel.org>, Mark Zhang <markz@nvidia.com>, Laxman Dewangan <ldewangan@nvidia.com>, Venkat Reddy Talla <vreddytalla@nvidia.com> Subject: [PATCH v2 1/4] mfd: max77620: Add backup battery charger support Date: Tue, 29 Jan 2019 16:55:28 +0800 [thread overview] Message-ID: <20190129085531.32364-2-markz@nvidia.com> (raw) In-Reply-To: <20190129085531.32364-1-markz@nvidia.com> Add PMIC configurations for backup battery charger, which is a constant voltage and constant current style charger with a series output resistance. The max77620 register CNFGBBC(addr: 0x04) defines the parameters of backup battery charger. This patch adds support for it. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com> Signed-off-by: Mark Zhang <markz@nvidia.com> --- drivers/mfd/max77620.c | 80 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index d8ddd1a6f304..f58143103185 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -398,6 +398,82 @@ static int max77620_initialise_fps(struct max77620_chip *chip) return 0; } +static int max77620_init_backup_battery_charging(struct max77620_chip *chip) +{ + struct device *dev = chip->dev; + struct device_node *np; + u32 pval; + u8 config; + int charging_current; + int charging_voltage; + int resistor; + int ret; + + np = of_get_child_by_name(dev->of_node, "backup-battery"); + if (!np) { + dev_info(dev, "Backup battery charging support disabled\n"); + ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGBBC, + MAX77620_CNFGBBC_ENABLE, 0); + if (ret < 0) + dev_err(dev, "Failed to update CNFGBBC: %d\n", ret); + return ret; + } + + ret = of_property_read_u32(np, + "maxim,backup-battery-charging-current", &pval); + charging_current = (!ret) ? pval : 50; + + ret = of_property_read_u32(np, + "maxim,backup-battery-charging-voltage", &pval); + charging_voltage = (!ret) ? pval : 2500000; + charging_voltage /= 1000; + + ret = of_property_read_u32(np, + "maxim,backup-battery-output-resister", &pval); + resistor = (!ret) ? pval : 1000; + + config = MAX77620_CNFGBBC_ENABLE; + if (charging_current <= 50) + config |= 0 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 100) + config |= 3 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 200) + config |= 0 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 400) + config |= 3 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else if (charging_current <= 600) + config |= 1 << MAX77620_CNFGBBC_CURRENT_SHIFT; + else + config |= 2 << MAX77620_CNFGBBC_CURRENT_SHIFT; + + if (charging_current > 100) + config |= MAX77620_CNFGBBC_LOW_CURRENT_DISABLE; + + if (charging_voltage <= 2500) + config |= 0 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + else if (charging_voltage <= 3000) + config |= 1 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + else if (charging_voltage <= 3300) + config |= 2 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + else + config |= 3 << MAX77620_CNFGBBC_VOLTAGE_SHIFT; + + if (resistor <= 100) + config |= 0 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + else if (resistor <= 1000) + config |= 1 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + else if (resistor <= 3000) + config |= 2 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + else if (resistor <= 6000) + config |= 3 << MAX77620_CNFGBBC_RESISTOR_SHIFT; + + ret = regmap_write(chip->rmap, MAX77620_REG_CNFGBBC, config); + if (ret < 0) + dev_err(dev, "Reg 0x%02x write failed, %d\n", + MAX77620_REG_CNFGBBC, ret); + return ret; +} + static int max77620_read_es_version(struct max77620_chip *chip) { unsigned int val; @@ -483,6 +559,10 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; + ret = max77620_init_backup_battery_charging(chip); + if (ret < 0) + return ret; + ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, mfd_cells, n_mfd_cells, NULL, 0, regmap_irq_get_domain(chip->top_irq_data)); -- 2.19.2
next prev parent reply other threads:[~2019-01-29 8:55 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-29 8:55 [PATCH v2 0/4] Add max77620 charging & low battery support Mark Zhang 2019-01-29 8:55 ` Mark Zhang 2019-01-29 8:55 ` Mark Zhang [this message] 2019-01-29 8:55 ` [PATCH v2 1/4] mfd: max77620: Add backup battery charger support Mark Zhang 2019-01-29 8:55 ` [PATCH v2 2/4] mfd: max77620: add documentation for backup battery charging Mark Zhang 2019-01-29 8:55 ` Mark Zhang 2019-01-30 19:51 ` Rob Herring 2019-01-31 2:26 ` Mark Zhang 2019-01-31 2:26 ` Mark Zhang 2019-01-29 8:55 ` [PATCH v2 3/4] mfd: max77620: Add low battery monitor support Mark Zhang 2019-01-29 8:55 ` Mark Zhang 2019-01-29 8:55 ` [PATCH v2 4/4] mfd: max77620: add documentation for low battery monitoring Mark Zhang 2019-01-29 8:55 ` Mark Zhang 2019-01-30 19:53 ` Rob Herring 2019-01-31 2:29 ` Mark Zhang 2019-01-31 2:29 ` Mark Zhang 2019-01-31 21:05 ` Rob Herring 2019-01-31 21:37 ` Billy laws 2019-02-07 8:48 ` [PATCH v2 0/4] Add max77620 charging & low battery support Lee Jones 2019-02-12 4:38 ` Mark Zhang 2019-02-12 4:38 ` Mark Zhang 2019-02-12 8:04 ` Lee Jones 2019-02-12 8:29 ` Mark Zhang 2019-02-12 8:29 ` Mark Zhang
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