From: Mark Zhang <markz@nvidia.com> To: lee.jones@linaro.org, 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 v3 3/4] mfd: max77620: Add low battery monitor support Date: Tue, 12 Feb 2019 14:43:52 +0800 [thread overview] Message-ID: <20190212064353.7451-4-markz@nvidia.com> (raw) In-Reply-To: <20190212064353.7451-1-markz@nvidia.com> This patch adds PMIC configurations for low-battery monitoring by handling max77620 register CNFGGLBL1. 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 | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index 494d98357f65..6f0c85b2ca26 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -474,6 +474,35 @@ static int max77620_init_backup_battery_charging(struct max77620_chip *chip) return ret; } +static int max77620_init_low_battery_monitor(struct max77620_chip *chip) +{ + struct device *dev = chip->dev; + bool bval; + int ival; + u8 mask = 0; + u8 val = 0; + int ret; + + mask |= MAX77620_CNFGGLBL1_LBDAC_EN; + bval = of_property_read_bool(dev->of_node, + "maxim,low-battery-dac-enable"); + if (bval) + val |= MAX77620_CNFGGLBL1_LBDAC_EN; + + mask |= MAX77620_CNFGGLBL1_LBRSTEN | MAX77620_CNFGGLBL1_MPPLD; + ival = of_property_match_string(dev->of_node, + "maxim,low-battery-mode", "shutdown"); + if (ival < 0) + val |= MAX77620_CNFGGLBL1_LBRSTEN; + else + val |= MAX77620_CNFGGLBL1_MPPLD; + + ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val); + if (ret < 0) + dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret); + return ret; +} + static int max77620_read_es_version(struct max77620_chip *chip) { unsigned int val; @@ -563,7 +592,11 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, + ret = max77620_init_low_battery_monitor(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)); if (ret < 0) { -- 2.19.2
WARNING: multiple messages have this Message-ID (diff)
From: Mark Zhang <markz@nvidia.com> To: <lee.jones@linaro.org>, <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 v3 3/4] mfd: max77620: Add low battery monitor support Date: Tue, 12 Feb 2019 14:43:52 +0800 [thread overview] Message-ID: <20190212064353.7451-4-markz@nvidia.com> (raw) In-Reply-To: <20190212064353.7451-1-markz@nvidia.com> This patch adds PMIC configurations for low-battery monitoring by handling max77620 register CNFGGLBL1. 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 | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index 494d98357f65..6f0c85b2ca26 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -474,6 +474,35 @@ static int max77620_init_backup_battery_charging(struct max77620_chip *chip) return ret; } +static int max77620_init_low_battery_monitor(struct max77620_chip *chip) +{ + struct device *dev = chip->dev; + bool bval; + int ival; + u8 mask = 0; + u8 val = 0; + int ret; + + mask |= MAX77620_CNFGGLBL1_LBDAC_EN; + bval = of_property_read_bool(dev->of_node, + "maxim,low-battery-dac-enable"); + if (bval) + val |= MAX77620_CNFGGLBL1_LBDAC_EN; + + mask |= MAX77620_CNFGGLBL1_LBRSTEN | MAX77620_CNFGGLBL1_MPPLD; + ival = of_property_match_string(dev->of_node, + "maxim,low-battery-mode", "shutdown"); + if (ival < 0) + val |= MAX77620_CNFGGLBL1_LBRSTEN; + else + val |= MAX77620_CNFGGLBL1_MPPLD; + + ret = regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val); + if (ret < 0) + dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret); + return ret; +} + static int max77620_read_es_version(struct max77620_chip *chip) { unsigned int val; @@ -563,7 +592,11 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, + ret = max77620_init_low_battery_monitor(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)); if (ret < 0) { -- 2.19.2
next prev parent reply other threads:[~2019-02-12 6:43 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-12 6:43 [PATCH v3 0/4] Add max77620 charging & low battery support Mark Zhang 2019-02-12 6:43 ` Mark Zhang 2019-02-12 6:43 ` [PATCH v3 1/4] mfd: max77620: Add backup battery charger support Mark Zhang 2019-02-12 6:43 ` Mark Zhang 2019-02-12 8:06 ` Lee Jones 2019-02-12 6:43 ` [PATCH v3 2/4] mfd: max77620: add documentation for backup battery charging Mark Zhang 2019-02-12 6:43 ` Mark Zhang 2019-02-18 18:06 ` Rob Herring 2019-02-19 2:07 ` Mark Zhang 2019-02-19 2:07 ` Mark Zhang 2019-02-19 2:09 ` Mark Zhang 2019-02-19 2:09 ` Mark Zhang 2019-02-19 15:18 ` Rob Herring 2019-02-12 6:43 ` Mark Zhang [this message] 2019-02-12 6:43 ` [PATCH v3 3/4] mfd: max77620: Add low battery monitor support Mark Zhang 2019-02-12 6:43 ` [PATCH v3 4/4] mfd: max77620: add documentation for low battery monitoring Mark Zhang 2019-02-12 6:43 ` Mark Zhang
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