forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
ARM: pxa: separate the clock support into clock-{pxa2xx,pxa3xx}.c
Signed-off-by: Eric Miao <[email protected]>
- Loading branch information
Showing
8 changed files
with
266 additions
and
240 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| /* | ||
| * linux/arch/arm/mach-pxa/clock-pxa2xx.c | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| #include <linux/module.h> | ||
| #include <linux/kernel.h> | ||
| #include <linux/init.h> | ||
|
|
||
| #include <mach/pxa2xx-regs.h> | ||
|
|
||
| #include "clock.h" | ||
|
|
||
| void clk_pxa2xx_cken_enable(struct clk *clk) | ||
| { | ||
| CKEN |= 1 << clk->cken; | ||
| } | ||
|
|
||
| void clk_pxa2xx_cken_disable(struct clk *clk) | ||
| { | ||
| CKEN &= ~(1 << clk->cken); | ||
| } | ||
|
|
||
| const struct clkops clk_pxa2xx_cken_ops = { | ||
| .enable = clk_pxa2xx_cken_enable, | ||
| .disable = clk_pxa2xx_cken_disable, | ||
| }; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| /* | ||
| * linux/arch/arm/mach-pxa/clock-pxa3xx.c | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| #include <linux/module.h> | ||
| #include <linux/kernel.h> | ||
| #include <linux/init.h> | ||
|
|
||
| #include <mach/pxa3xx-regs.h> | ||
|
|
||
| #include "clock.h" | ||
|
|
||
| /* Crystal clock: 13MHz */ | ||
| #define BASE_CLK 13000000 | ||
|
|
||
| /* Ring Oscillator Clock: 60MHz */ | ||
| #define RO_CLK 60000000 | ||
|
|
||
| #define ACCR_D0CS (1 << 26) | ||
| #define ACCR_PCCE (1 << 11) | ||
|
|
||
| /* crystal frequency to static memory controller multiplier (SMCFS) */ | ||
| static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, }; | ||
|
|
||
| /* crystal frequency to HSIO bus frequency multiplier (HSS) */ | ||
| static unsigned char hss_mult[4] = { 8, 12, 16, 24 }; | ||
|
|
||
| /* | ||
| * Get the clock frequency as reflected by CCSR and the turbo flag. | ||
| * We assume these values have been applied via a fcs. | ||
| * If info is not 0 we also display the current settings. | ||
| */ | ||
| unsigned int pxa3xx_get_clk_frequency_khz(int info) | ||
| { | ||
| unsigned long acsr, xclkcfg; | ||
| unsigned int t, xl, xn, hss, ro, XL, XN, CLK, HSS; | ||
|
|
||
| /* Read XCLKCFG register turbo bit */ | ||
| __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg)); | ||
| t = xclkcfg & 0x1; | ||
|
|
||
| acsr = ACSR; | ||
|
|
||
| xl = acsr & 0x1f; | ||
| xn = (acsr >> 8) & 0x7; | ||
| hss = (acsr >> 14) & 0x3; | ||
|
|
||
| XL = xl * BASE_CLK; | ||
| XN = xn * XL; | ||
|
|
||
| ro = acsr & ACCR_D0CS; | ||
|
|
||
| CLK = (ro) ? RO_CLK : ((t) ? XN : XL); | ||
| HSS = (ro) ? RO_CLK : hss_mult[hss] * BASE_CLK; | ||
|
|
||
| if (info) { | ||
| pr_info("RO Mode clock: %d.%02dMHz (%sactive)\n", | ||
| RO_CLK / 1000000, (RO_CLK % 1000000) / 10000, | ||
| (ro) ? "" : "in"); | ||
| pr_info("Run Mode clock: %d.%02dMHz (*%d)\n", | ||
| XL / 1000000, (XL % 1000000) / 10000, xl); | ||
| pr_info("Turbo Mode clock: %d.%02dMHz (*%d, %sactive)\n", | ||
| XN / 1000000, (XN % 1000000) / 10000, xn, | ||
| (t) ? "" : "in"); | ||
| pr_info("HSIO bus clock: %d.%02dMHz\n", | ||
| HSS / 1000000, (HSS % 1000000) / 10000); | ||
| } | ||
|
|
||
| return CLK / 1000; | ||
| } | ||
|
|
||
| /* | ||
| * Return the current AC97 clock frequency. | ||
| */ | ||
| static unsigned long clk_pxa3xx_ac97_getrate(struct clk *clk) | ||
| { | ||
| unsigned long rate = 312000000; | ||
| unsigned long ac97_div; | ||
|
|
||
| ac97_div = AC97_DIV; | ||
|
|
||
| /* This may loose precision for some rates but won't for the | ||
| * standard 24.576MHz. | ||
| */ | ||
| rate /= (ac97_div >> 12) & 0x7fff; | ||
| rate *= (ac97_div & 0xfff); | ||
|
|
||
| return rate; | ||
| } | ||
|
|
||
| /* | ||
| * Return the current HSIO bus clock frequency | ||
| */ | ||
| static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk) | ||
| { | ||
| unsigned long acsr; | ||
| unsigned int hss, hsio_clk; | ||
|
|
||
| acsr = ACSR; | ||
|
|
||
| hss = (acsr >> 14) & 0x3; | ||
| hsio_clk = (acsr & ACCR_D0CS) ? RO_CLK : hss_mult[hss] * BASE_CLK; | ||
|
|
||
| return hsio_clk; | ||
| } | ||
|
|
||
| void clk_pxa3xx_cken_enable(struct clk *clk) | ||
| { | ||
| unsigned long mask = 1ul << (clk->cken & 0x1f); | ||
|
|
||
| if (clk->cken < 32) | ||
| CKENA |= mask; | ||
| else | ||
| CKENB |= mask; | ||
| } | ||
|
|
||
| void clk_pxa3xx_cken_disable(struct clk *clk) | ||
| { | ||
| unsigned long mask = 1ul << (clk->cken & 0x1f); | ||
|
|
||
| if (clk->cken < 32) | ||
| CKENA &= ~mask; | ||
| else | ||
| CKENB &= ~mask; | ||
| } | ||
|
|
||
| const struct clkops clk_pxa3xx_cken_ops = { | ||
| .enable = clk_pxa3xx_cken_enable, | ||
| .disable = clk_pxa3xx_cken_disable, | ||
| }; | ||
|
|
||
| const struct clkops clk_pxa3xx_hsio_ops = { | ||
| .enable = clk_pxa3xx_cken_enable, | ||
| .disable = clk_pxa3xx_cken_disable, | ||
| .getrate = clk_pxa3xx_hsio_getrate, | ||
| }; | ||
|
|
||
| const struct clkops clk_pxa3xx_ac97_ops = { | ||
| .enable = clk_pxa3xx_cken_enable, | ||
| .disable = clk_pxa3xx_cken_disable, | ||
| .getrate = clk_pxa3xx_ac97_getrate, | ||
| }; | ||
|
|
||
| static void clk_pout_enable(struct clk *clk) | ||
| { | ||
| OSCC |= OSCC_PEN; | ||
| } | ||
|
|
||
| static void clk_pout_disable(struct clk *clk) | ||
| { | ||
| OSCC &= ~OSCC_PEN; | ||
| } | ||
|
|
||
| const struct clkops clk_pxa3xx_pout_ops = { | ||
| .enable = clk_pout_enable, | ||
| .disable = clk_pout_disable, | ||
| }; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.