From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Belisko Subject: [PATCH v4 2/6] power: twl4030_madc_battery: Add device tree support Date: Tue, 10 Mar 2015 22:27:23 +0100 Message-ID: <1426022847-30912-3-git-send-email-marek@goldelico.com> References: <1426022847-30912-1-git-send-email-marek@goldelico.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1426022847-30912-1-git-send-email-marek@goldelico.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: bcousson@baylibre.com, tony@atomide.com, sre@kernel.org, dbaryshkov@gmail.com, dwmw2@infradead.org Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, hns@goldelico.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, galak@codeaurora.org, Marek Belisko , linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org Signed-off-by: Marek Belisko --- drivers/power/twl4030_madc_battery.c | 81 ++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/power/twl4030_madc_battery.c b/drivers/power/twl4030_madc_battery.c index 6af28b5..4bcb4a9 100644 --- a/drivers/power/twl4030_madc_battery.c +++ b/drivers/power/twl4030_madc_battery.c @@ -20,6 +20,7 @@ #include #include #include +#include struct twl4030_madc_battery { struct power_supply psy; @@ -183,6 +184,82 @@ static int twl4030_cmp(const void *a, const void *b) ((struct twl4030_madc_bat_calibration *)a)->voltage; } +#ifdef CONFIG_OF +static struct twl4030_madc_bat_platform_data * + twl4030_madc_dt_probe(struct platform_device *pdev) +{ + struct twl4030_madc_bat_platform_data *pdata; + struct device_node *np = pdev->dev.of_node; + int ret; + int i, proplen; + + pdata = devm_kzalloc(&pdev->dev, + sizeof(struct twl4030_madc_bat_platform_data), + GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_u32(np, "capacity-uah", &pdata->capacity); + if (ret != 0) + return ERR_PTR(-EINVAL); + + /* parse and prepare charging data */ + proplen = of_property_count_u32_elems(np, "ti,volt-to-capacity-charging-map"); + if (proplen < 0) { + dev_warn(&pdev->dev, "No 'ti,volt-to-capacity-charging-map' property found\n"); + return ERR_PTR(-EINVAL); + } + + pdata->charging = devm_kzalloc(&pdev->dev, + sizeof(struct twl4030_madc_bat_calibration) * (proplen / 2), + GFP_KERNEL); + + for (i = 0; i < proplen / 2; i++) { + of_property_read_u32_index(np, "ti,volt-to-capacity-charging-map", + i * 2, + (u32 *)&pdata->charging[i].voltage); + of_property_read_u32_index(np, "ti,volt-to-capacity-charging-map", + i * 2 + 1, + (u32 *)&pdata->charging[i].level); + } + + /* parse and prepare discharging data */ + proplen = of_property_count_u32_elems(np, + "ti,volt-to-capacity-discharging-map"); + if (proplen < 0) { + dev_warn(&pdev->dev, "No 'ti,volt-to-capacity-discharging-map' property found\n"); + return ERR_PTR(-EINVAL); + } + + pdata->discharging = devm_kzalloc(&pdev->dev, + sizeof(struct twl4030_madc_bat_calibration) * (proplen / 2), + GFP_KERNEL); + + for (i = 0; i < proplen / 2; i++) { + of_property_read_u32_index(np, "ti,volt-to-capacity-discharging-map", + i * 2, + (u32 *)&pdata->discharging[i].voltage); + of_property_read_u32_index(np, "ti,volt-to-capacity-discharging-map", + i * 2 + 1, + (u32 *)&pdata->discharging[i].level); + } + + return pdata; +} + +static const struct of_device_id of_twl4030_madc_match[] = { + { .compatible = "ti,twl4030-madc-battery", }, + {}, +}; + +#else +static struct twl4030_madc_bat_platform_data * + twl4030_madc_dt_probe(struct platform_device *pdev) +{ + return ERR_PTR(-ENODEV); +} +#endif + static int twl4030_madc_battery_probe(struct platform_device *pdev) { struct twl4030_madc_battery *twl4030_madc_bat; @@ -194,6 +271,9 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev) if (!twl4030_madc_bat) return -ENOMEM; + if (!pdata) + pdata = twl4030_madc_dt_probe(pdev); + twl4030_madc_bat->psy.name = "twl4030_battery"; twl4030_madc_bat->psy.type = POWER_SUPPLY_TYPE_BATTERY; twl4030_madc_bat->psy.properties = twl4030_madc_bat_props; @@ -263,6 +343,7 @@ static int twl4030_madc_battery_remove(struct platform_device *pdev) static struct platform_driver twl4030_madc_battery_driver = { .driver = { .name = "twl4030_madc_battery", + .of_match_table = of_match_ptr(of_twl4030_madc_match), }, .probe = twl4030_madc_battery_probe, .remove = twl4030_madc_battery_remove, -- 1.9.1