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Thu, 19 May 2022 15:49:50 -0700 (PDT) Received: from localhost ([2620:15c:11a:202:5332:2096:60a3:3455]) by smtp.gmail.com with UTF8SMTPSA id z10-20020a17090a170a00b001dc1e6db7c2sm295791pjd.57.2022.05.19.15.49.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 19 May 2022 15:49:49 -0700 (PDT) Date: Thu, 19 May 2022 15:49:48 -0700 From: Matthias Kaehlcke To: Tzung-Bi Shih Cc: bleung@chromium.org, groeck@chromium.org, robh+dt@kernel.org, chrome-platform@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Guenter Roeck Subject: Re: [PATCH v3 4/5] platform/chrome: cros_kbd_led_backlight: support OF match Message-ID: References: <20220321085547.1162312-1-tzungbi@kernel.org> <20220321085547.1162312-5-tzungbi@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20220321085547.1162312-5-tzungbi@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 21, 2022 at 04:55:46PM +0800, Tzung-Bi Shih wrote: > For letting device tree based machines to use the driver, support OF match. > > Reviewed-by: Guenter Roeck > Signed-off-by: Tzung-Bi Shih > --- > Changes from v2: > - Add commit message. > - Add R-b tag. > > Changes from v1: > (https://patchwork.kernel.org/project/chrome-platform/patch/20220214053646.3088298-5-tzungbi@google.com/) > - Update email address accordingly. > - Use device_get_match_data() per review comment in v1. > > drivers/platform/chrome/cros_kbd_led_backlight.c | 15 ++++++++++++++- > 1 file changed, 14 insertions(+), 1 deletion(-) > > diff --git a/drivers/platform/chrome/cros_kbd_led_backlight.c b/drivers/platform/chrome/cros_kbd_led_backlight.c > index 05b4f274086b..5cbe27cb4610 100644 > --- a/drivers/platform/chrome/cros_kbd_led_backlight.c > +++ b/drivers/platform/chrome/cros_kbd_led_backlight.c > @@ -10,7 +10,9 @@ > #include > #include > #include > +#include > #include > +#include > #include > > /** > @@ -127,7 +129,7 @@ static int keyboard_led_probe(struct platform_device *pdev) > const struct keyboard_led_drvdata *drvdata; > int error; > > - drvdata = acpi_device_get_match_data(&pdev->dev); > + drvdata = device_get_match_data(&pdev->dev); > if (!drvdata) > return -EINVAL; > > @@ -163,10 +165,21 @@ static const struct acpi_device_id keyboard_led_acpi_match[] = { > MODULE_DEVICE_TABLE(acpi, keyboard_led_acpi_match); > #endif > > +#ifdef CONFIG_OF > +static const struct of_device_id keyboard_led_of_match[] = { > + { > + .compatible = "google,cros-kbd-led-backlight", > + }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, keyboard_led_of_match); > +#endif > + > static struct platform_driver keyboard_led_driver = { > .driver = { > .name = "chromeos-keyboard-leds", > .acpi_match_table = ACPI_PTR(keyboard_led_acpi_match), > + .of_match_table = of_match_ptr(keyboard_led_of_match), In patch "[5/5] platform/chrome: cros_kbd_led_backlight: support EC PWM backend" [1] you create the 'stubs' keyboard_led_init_ec_pwm_null() and keyboard_led_drvdata_ec_pwm when CONFIG_CROS_KBD_LED_BACKLIGHT_EC_PWM isn't set, only to have something to assign to keyboard_led_of_match.data. Instead you could assign .of_match_table only if CONFIG_CROS_KBD_LED_BACKLIGHT_EC_PWM is set. [1] https://patchwork.kernel.org/project/chrome-platform/patch/20220321085547.1162312-6-tzungbi@kernel.org/