diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/802-can-0001-imx-busfreq-Add-API-header-file.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/802-can-0001-imx-busfreq-Add-API-header-file.patch | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/802-can-0001-imx-busfreq-Add-API-header-file.patch b/target/linux/layerscape/patches-5.4/802-can-0001-imx-busfreq-Add-API-header-file.patch new file mode 100644 index 0000000000..e7a31c551e --- /dev/null +++ b/target/linux/layerscape/patches-5.4/802-can-0001-imx-busfreq-Add-API-header-file.patch @@ -0,0 +1,95 @@ +From c8055614385c90accdea4e7a046c5560bccc84cf Mon Sep 17 00:00:00 2001 +From: Leonard Crestez <leonard.crestez@nxp.com> +Date: Mon, 13 May 2019 15:06:37 +0300 +Subject: [PATCH] imx busfreq: Add API header file + +Add sufficient enough definitions so that drivers which call +request_bus_freq and release_bus_freq can compile even if +CONFIG_HAVE_IMX_BUSFREQ is missing. + +Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> +--- + include/linux/busfreq-imx.h | 77 +++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 77 insertions(+) + create mode 100644 include/linux/busfreq-imx.h + +--- /dev/null ++++ b/include/linux/busfreq-imx.h +@@ -0,0 +1,77 @@ ++/* ++ * Copyright 2012-2016 Freescale Semiconductor, Inc. All Rights Reserved. ++ * ++ * 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. ++ */ ++ ++#ifndef __ASM_ARCH_MXC_BUSFREQ_H__ ++#define __ASM_ARCH_MXC_BUSFREQ_H__ ++ ++#include <linux/notifier.h> ++#include <linux/regulator/consumer.h> ++ ++/* ++ * This enumerates busfreq low power mode entry and exit. ++ */ ++enum busfreq_event { ++ LOW_BUSFREQ_ENTER, ++ LOW_BUSFREQ_EXIT, ++}; ++ ++/* ++ * This enumerates the system bus and ddr frequencies in various modes. ++ * BUS_FREQ_HIGH - DDR @ 528MHz, AHB @ 132MHz. ++ * BUS_FREQ_MED - DDR @ 400MHz, AHB @ 132MHz ++ * BUS_FREQ_AUDIO - DDR @ 50MHz/100MHz, AHB @ 24MHz. ++ * BUS_FREQ_LOW - DDR @ 24MHz, AHB @ 24MHz. ++ * BUS_FREQ_ULTRA_LOW - DDR @ 1MHz, AHB - 3MHz. ++ * ++ * Drivers need to request/release the bus/ddr frequencies based on ++ * their performance requirements. Drivers cannot request/release ++ * BUS_FREQ_ULTRA_LOW mode as this mode is automatically entered from ++ * either BUS_FREQ_AUDIO or BUS_FREQ_LOW ++ * modes. ++ */ ++enum bus_freq_mode { ++ BUS_FREQ_HIGH, ++ BUS_FREQ_MED, ++ BUS_FREQ_AUDIO, ++ BUS_FREQ_LOW, ++ BUS_FREQ_ULTRA_LOW, ++}; ++ ++#if defined(CONFIG_HAVE_IMX_BUSFREQ) && !defined(CONFIG_ARM64) ++extern struct regulator *arm_reg; ++extern struct regulator *soc_reg; ++void request_bus_freq(enum bus_freq_mode mode); ++void release_bus_freq(enum bus_freq_mode mode); ++int register_busfreq_notifier(struct notifier_block *nb); ++int unregister_busfreq_notifier(struct notifier_block *nb); ++int get_bus_freq_mode(void); ++#elif defined(CONFIG_HAVE_IMX_BUSFREQ) ++void request_bus_freq(enum bus_freq_mode mode); ++void release_bus_freq(enum bus_freq_mode mode); ++int get_bus_freq_mode(void); ++#else ++static inline void request_bus_freq(enum bus_freq_mode mode) ++{ ++} ++static inline void release_bus_freq(enum bus_freq_mode mode) ++{ ++} ++static inline int register_busfreq_notifier(struct notifier_block *nb) ++{ ++ return 0; ++} ++static inline int unregister_busfreq_notifier(struct notifier_block *nb) ++{ ++ return 0; ++} ++static inline int get_bus_freq_mode(void) ++{ ++ return BUS_FREQ_HIGH; ++} ++#endif ++#endif |