Christian Riesch <christian.rie...@omicron.at> writes: > From: Bob Dunlop <bob.dun...@xyzzy.org.uk> > > Currently the input frequency of the SoC is hardcoded in the SoC specific > da850.c file to 24 MHz. Since the SoC accepts input frequencies in a wide > range from 12 to 50 MHz, boards with different oscillator/crystal > frequencies may be built. > > This patch allows setting a different input frequency in the board > specific files to support boards with oscillator/crystal frequencies other > than 24 MHz. > > Signed-off-by: Bob Dunlop <bob.dun...@xyzzy.org.uk> > Signed-off-by: Christian Riesch <christian.rie...@omicron.at>
Why not allow board code to just do a clk_set_rate()? Currently the ref_clk struct clk does not have a .set_rate method implemented, but that should be easy enough to add. Then the default ref_clk.rate would stay the 24MHz, but any boards that want to override that simply use clk_get(), clk_set_rate(), clk_put() Kevin > --- > > Hi, > in private email Bob Dunlop suggested to pass a pointer to a small > structure instead of the frequency value to allow future expansions, > e.g., for the OPP list. Therefore I submit his patch as V2. > Christian > > arch/arm/mach-davinci/board-da850-evm.c | 2 +- > arch/arm/mach-davinci/board-mityomapl138.c | 2 +- > arch/arm/mach-davinci/board-omapl138-hawk.c | 2 +- > arch/arm/mach-davinci/da850.c | 5 ++++- > arch/arm/mach-davinci/include/mach/da8xx.h | 6 +++++- > 5 files changed, 12 insertions(+), 5 deletions(-) > > diff --git a/arch/arm/mach-davinci/board-da850-evm.c > b/arch/arm/mach-davinci/board-da850-evm.c > index a7b41bf..231ff87 100644 > --- a/arch/arm/mach-davinci/board-da850-evm.c > +++ b/arch/arm/mach-davinci/board-da850-evm.c > @@ -1252,7 +1252,7 @@ console_initcall(da850_evm_console_init); > > static void __init da850_evm_map_io(void) > { > - da850_init(); > + da850_init(NULL); > } > > MACHINE_START(DAVINCI_DA850_EVM, "DaVinci DA850/OMAP-L138/AM18x EVM") > diff --git a/arch/arm/mach-davinci/board-mityomapl138.c > b/arch/arm/mach-davinci/board-mityomapl138.c > index 606a6f2..362770c 100644 > --- a/arch/arm/mach-davinci/board-mityomapl138.c > +++ b/arch/arm/mach-davinci/board-mityomapl138.c > @@ -561,7 +561,7 @@ console_initcall(mityomapl138_console_init); > > static void __init mityomapl138_map_io(void) > { > - da850_init(); > + da850_init(NULL); > } > > MACHINE_START(MITYOMAPL138, "MityDSP-L138/MityARM-1808") > diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c > b/arch/arm/mach-davinci/board-omapl138-hawk.c > index 67c38d0..c43a6c3 100644 > --- a/arch/arm/mach-davinci/board-omapl138-hawk.c > +++ b/arch/arm/mach-davinci/board-omapl138-hawk.c > @@ -334,7 +334,7 @@ console_initcall(omapl138_hawk_console_init); > > static void __init omapl138_hawk_map_io(void) > { > - da850_init(); > + da850_init(NULL); > } > > MACHINE_START(OMAPL138_HAWKBOARD, "AM18x/OMAP-L138 Hawkboard") > diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c > index 133aac4..ebd0603 100644 > --- a/arch/arm/mach-davinci/da850.c > +++ b/arch/arm/mach-davinci/da850.c > @@ -1104,10 +1104,13 @@ static struct davinci_soc_info davinci_soc_info_da850 > = { > .reset_device = &da8xx_wdt_device, > }; > > -void __init da850_init(void) > +void __init da850_init(struct da850_init_board_info *board) > { > unsigned int v; > > + if (board && board->ref_clk_rate) > + ref_clk.rate = board->ref_clk_rate; > + > davinci_common_init(&davinci_soc_info_da850); > > da8xx_syscfg0_base = ioremap(DA8XX_SYSCFG0_BASE, SZ_4K); > diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h > b/arch/arm/mach-davinci/include/mach/da8xx.h > index ad64da7..66efc5d 100644 > --- a/arch/arm/mach-davinci/include/mach/da8xx.h > +++ b/arch/arm/mach-davinci/include/mach/da8xx.h > @@ -69,8 +69,12 @@ extern unsigned int da850_max_speed; > #define DA8XX_AEMIF_CTL_BASE 0x68000000 > #define DA8XX_ARM_RAM_BASE 0xffff0000 > > +struct da850_init_board_info { > + unsigned long ref_clk_rate; > +}; > + > void __init da830_init(void); > -void __init da850_init(void); > +void __init da850_init(struct da850_init_board_info *board); > > int da830_register_edma(struct edma_rsv_info *rsv); > int da850_register_edma(struct edma_rsv_info *rsv[2]); _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source