Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 92fe58f0 authored by Prashant Gaikwad's avatar Prashant Gaikwad Committed by Stephen Warren
Browse files

ARM: tegra: Port tegra to generic clock framework 



This patch converts tegra clock code to generic clock framework in following way:
 - Implement clk_ops as required by generic clk framework. (tegraXX_clocks.c)
 - Use platform specific struct clk_tegra in clk_ops implementation instead of struct clk.
 - Initialize all clock data statically. (tegraXX_clocks_data.c)

Legacy framework did not have recalc_rate and is_enabled functions. Implemented these functions.
Removed init function. It's functionality is splitted into recalc_rate and is_enabled.

Static initialization is used since slab is not up in .init_early and clock
is needed to be initialized before clockevent/clocksource initialization.
Macros redefined for clk_tegra.

Also, single struct clk_tegra is used for all type of clocks (PLL, peripheral etc.). This
is to move quickly to generic common clock framework so that other dependent features will
not be blocked (such as DT binding).

Enabling COMMON_CLOCK config moved to ARCH_TEGRA since it is enabled for both Tegra20
and Tegra30.

Signed-off-by: default avatarPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent 96a1bd1e

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -686,6 +686,7 @@ config ARCH_TEGRA 
	select NEED_MACH_IO_H if PCI

	select ARCH_HAS_CPUFREQ

	select USE_OF

	select COMMON_CLK

	help

	  This enables support for NVIDIA Tegra based systems (Tegra APX,

	  Tegra 6xx and Tegra 2 series).

arch/arm/mach-tegra/clock.h

+1 −0
Original line number Diff line number Diff line
@@ -233,6 +233,7 @@ int clk_set_rate_locked(struct clk *c, unsigned long rate); 
int clk_reparent(struct clk *c, struct clk *parent);

#endif /* !CONFIG_COMMON_CLK */



void tegra_clk_add(struct clk *c);

void tegra2_init_clocks(void);

void tegra30_init_clocks(void);

struct clk *tegra_get_clock_by_name(const char *name);

arch/arm/mach-tegra/tegra20_clocks.c

+565 −497

File changed.

Preview size limit exceeded, changes collapsed.

arch/arm/mach-tegra/tegra20_clocks.h

+4 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#ifndef __MACH_TEGRA20_CLOCK_H

#define __MACH_TEGRA20_CLOCK_H



extern struct clk_ops tegra_clk_32k_ops;

extern struct clk_ops tegra_pll_ops;

extern struct clk_ops tegra_clk_m_ops;

extern struct clk_ops tegra_pll_div_ops;
@@ -34,4 +35,7 @@ extern struct clk_ops tegra_emc_clk_ops; 
extern struct clk_ops tegra_periph_clk_ops;

extern struct clk_ops tegra_clk_shared_bus_ops;



void tegra2_periph_clk_reset(struct clk_hw *hw, bool assert);

void tegra2_cop_clk_reset(struct clk_hw *hw, bool assert);



#endif

arch/arm/mach-tegra/tegra20_clocks_data.c

+736 −564

File changed.

Preview size limit exceeded, changes collapsed.