xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge tag 'tegra-for-4.2-emc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers

Browse Source 
Merge "ARM: tegra: Add EMC driver for v4.2-rc1" from Thierry Reding:

This introduces the EMC driver that's required to scale the external
memory frequency.

* tag 'tegra-for-4.2-emc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  memory: tegra: Add EMC frequency debugfs entry
  memory: tegra: Add EMC (external memory controller) driver
  memory: tegra: Add API needed by the EMC driver
  of: Add Tegra124 EMC bindings
  of: Document timings subnode of nvidia,tegra-mc
This commit is contained in:
Arnd Bergmann
2015-05-13 17:59:35 +02:00
parent 92d19e26d6 9c77a81f21
commit 44fb3026ad
9 changed files with 1820 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
include/soc/tegra/emc.h Normal file
View File

@@ -0,0 +1,19 @@
/*
* Copyright (c) 2014 NVIDIA Corporation. 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 __SOC_TEGRA_EMC_H__
#define __SOC_TEGRA_EMC_H__
struct tegra_emc;
int tegra_emc_prepare_timing_change(struct tegra_emc *emc,
unsigned long rate);
void tegra_emc_complete_timing_change(struct tegra_emc *emc,
unsigned long rate);
#endif /* __SOC_TEGRA_EMC_H__ */

14
include/soc/tegra/mc.h
View File

@@ -20,6 +20,12 @@ struct tegra_smmu_enable {
unsigned int bit;
};
struct tegra_mc_timing {
unsigned long rate;
u32 *emem_data;
};
/* latency allowance */
struct tegra_mc_la {
unsigned int reg;
@@ -90,7 +96,7 @@ struct tegra_mc_soc {
const struct tegra_mc_client *clients;
unsigned int num_clients;
const unsigned int *emem_regs;
const unsigned long *emem_regs;
unsigned int num_emem_regs;
unsigned int num_address_bits;
@@ -108,6 +114,12 @@ struct tegra_mc {
const struct tegra_mc_soc *soc;
unsigned long tick;
struct tegra_mc_timing *timings;
unsigned int num_timings;
};
void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate);
unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc);
#endif /* __SOC_TEGRA_MC_H__ */