[PATCH v1] cpufreq: rockchip: add driver
From: heiko@sntech.de (Heiko Stübner)
Date: 2016-03-22 16:07:57
Also in:
linux-pm, linux-rockchip, lkml
Hi, Am Dienstag, 22. M?rz 2016, 19:57:28 schrieb Feng Xiao:
This driver will directly use cpufreq-dt driver as backend. As there is not a generic devicetree board file(rockchip.c) on ARM64 architecture, so remove platform_device_register_simple in rockchip.c and add a new cpufreq driver to support Rockchip SoCs. Signed-off-by: Feng Xiao <redacted>
some hints regarding the soc-selection below, otherwise this looks nice. Reviewed-by: Heiko Stuebner <heiko@sntech.de> [includes an Ack for the mach-rockchip change ;-) ] [...]
quoted hunk ↗ jump to hunk
diff --git a/drivers/cpufreq/rockchip-cpufreq.cb/drivers/cpufreq/rockchip-cpufreq.c new file mode 100644 index 0000000..65c1de9--- /dev/null +++ b/drivers/cpufreq/rockchip-cpufreq.c@@ -0,0 +1,55 @@ +/* + * Rockchip Platforms CPUFreq Support + * + * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd + * + * Feng Xiao <xf@rock-chips.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +static const char * const rockchip_compat[] = { + "rockchip,rk2928",
+ "rockchip,rk3036",
+ "rockchip,rk3066a", + "rockchip,rk3066b", + "rockchip,rk3188",
+ "rockchip,rk3228",
+ "rockchip,rk3288",
+ "rockchip,rk3366",
+ "rockchip,rk3368",
+ "rockchip,rk3399",
+};
+
+static int __init rockchip_cpufreq_driver_init(void)
+{
+ struct platform_device *pdev;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(rockchip_compat); i++) {
+ if (of_machine_is_compatible(rockchip_compat[i])) {
+ pdev = platform_device_register_simple("cpufreq-dt",
+ -1, NULL, 0);
+ return PTR_ERR_OR_ZERO(pdev);
+ }
+ }
+
+ return -ENODEV;
+}
+module_init(rockchip_cpufreq_driver_init);
+
+MODULE_AUTHOR("Feng Xiao [off-list ref]");
+MODULE_DESCRIPTION("Rockchip cpufreq driver");
+MODULE_LICENSE("GPL v2");