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2024-06-26power: supply: samsung-sdi-battery: Constify struct power_supply_maintenance_charge_tableChristophe JAILLET4-6/+6
'struct power_supply_maintenance_charge_table' is not modified in this driver. Constifying this structure moves some data to a read-only section, so increase overall security. In order to do it, some code also needs to be adjusted to this new const qualifier. On a x86_64, with allmodconfig: Before: ====== $ size drivers/power/supply/samsung-sdi-battery.o text data bss dec hex filename 4055 4584 0 8639 21bf drivers/power/supply/samsung-sdi-battery.o After: ===== $ size drivers/power/supply/samsung-sdi-battery.o text data bss dec hex filename 4087 4552 0 8639 21bf drivers/power/supply/samsung-sdi-battery.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/6caafd0ac2556a40405273b1a4badc508ea8e9b0.1719125040.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-26power: supply: samsung-sdi-battery: Constify struct power_supply_vbat_ri_tableChristophe JAILLET3-15/+15
'struct power_supply_vbat_ri_table' are not modified in this driver. Constifying these structures moves some data to a read-only section, so increase overall security. In order to do it, some code also needs to be adjusted to this new const qualifier. On a x86_64, with allmodconfig: Before: ====== $ size drivers/power/supply/samsung-sdi-battery.o text data bss dec hex filename 955 7664 0 8619 21ab drivers/power/supply/samsung-sdi-battery.o After: ===== $ size drivers/power/supply/samsung-sdi-battery.o text data bss dec hex filename 4055 4584 0 8639 21bf drivers/power/supply/samsung-sdi-battery.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/d01818abd880bf435d1106a9a6cc11a7a8a3e661.1719125040.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-26power: supply: lenovo_yoga_c630_battery: add Lenovo C630 driverDmitry Baryshkov3-0/+511
On the Lenovo Yoga C630 WOS laptop the EC provides access to the adapter and battery status. Add the driver to read power supply status on the laptop. Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20240621-yoga-ec-driver-v8-1-daae67d0233d@linaro.org Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-26power: supply: ingenic: Fix some error handling paths in ingenic_battery_get_property()Christophe JAILLET1-4/+6
If iio_read_channel_processed() fails, 'val->intval' is not updated, but it is still *1000 just after. So, in case of error, the *1000 accumulate and 'val->intval' becomes erroneous. So instead of rescaling the value after the fact, use the dedicated scaling API. This way the result is updated only when needed. In case of error, the previous value is kept, unmodified. This should also reduce any inaccuracies resulting from the scaling. Finally, this is also slightly more efficient as it saves a function call and a multiplication. Fixes: fb24ccfbe1e0 ("power: supply: add Ingenic JZ47xx battery driver.") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Artur Rojek <contact@artur-rojek.eu> Link: https://lore.kernel.org/r/51e49c18574003db1e20c9299061a5ecd1661a3c.1719121781.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-26power: supply: ab8500: Clean some error messagesChristophe JAILLET1-4/+4
There is an useless extra comma at the end of some error messages, remove them. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/e7ac0fa83c6100cbe4e0efa90cf99291c2423b10.1719037737.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-26power: supply: ab8500: Use iio_read_channel_processed_scale()Christophe JAILLET1-12/+16
Instead of rescaling current or voltage channels after the fact, use the dedicated scaling API. This should reduce any inaccuracies resulting from the scaling. This is also slightly more efficient as it saves a function call and a multiplication. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/5668d73b92eb6318c7f094a9a8fa914c909485ca.1719037737.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-26power: supply: ab8500: Fix error handling when calling iio_read_channel_processed()Christophe JAILLET1-4/+12
The ab8500_charger_get_[ac|vbus]_[current|voltage]() functions should return an error code on error. Up to now, an un-initialized value is returned. This makes the error handling of the callers un-reliable. Return the error code instead, to fix the issue. Fixes: 97ab78bac5d0 ("power: supply: ab8500_charger: Convert to IIO ADC") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/f9f65642331c9e40aaebb888589db043db80b7eb.1719037737.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-06-24platform/arm64: build drivers even on non-ARM64 platformsDmitry Baryshkov1-1/+1
The Kconfig for platforms/arm64 has 'depends on ARM64 || COMPILE_TEST'. However due to Makefile having just obj-$(CONFIG_ARM64) the subdir will not be descended for !ARM64 platforms and thus the drivers won't get built. This breaks modular builds of other driver drivers which depend on arm64 platform drivers. Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fixes: 363c8aea2572 ("platform: Add ARM64 platform directory") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20240624-ucsi-yoga-ec-driver-v9-1-53af411a9bd6@linaro.org Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2024-06-14platform: arm64: add Lenovo Yoga C630 WOS EC driverDmitry Baryshkov4-0/+350
Lenovo Yoga C630 WOS is a laptop using Snapdragon 850 SoC. Like many laptops it uses an embedded controller (EC) to perform various platform operations, including, but not limited, to Type-C port control or power supply handlng. Add the driver for the EC, that creates devices for UCSI and power supply devices. Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20240614-yoga-ec-driver-v7-2-9f0b9b40ae76@linaro.org [ij: added #include <linux/cleanup.h>] Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>