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Move some of the OMAP2+ CM and System Control Module direct 

register accesses into CM- and System Control
 Module-specific "drivers" underneath arch/arm/mach-omap2/.  This
 is a prerequisite for moving this code out of arch/arm/mach-omap2/ into
 drivers/.
 
 Basic test logs are available here:
 
 http://www.pwsan.com/omap/testlogs/cm_scm_cleanup_a_v3.13/20131019101809/
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Merge tag 'for-v3.13/cm-scm-cleanup-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.13/cm-scm-cleanup

Move some of the OMAP2+ CM and System Control Module direct
register accesses into CM- and System Control
Module-specific "drivers" underneath arch/arm/mach-omap2/.  This
is a prerequisite for moving this code out of arch/arm/mach-omap2/ into
drivers/.

Basic test logs are available here:

http://www.pwsan.com/omap/testlogs/cm_scm_cleanup_a_v3.13/20131019101809/
This commit is contained in:
Tony Lindgren 2013-10-20 08:55:19 -07:00
parent d0e639c9e0 49e0340232
commit 54b89756a1
14 changed files with 177 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/mach-omap2/clkt2xxx_apll.c
View File

@ -52,7 +52,7 @@ static bool omap2xxx_clk_apll_locked(struct clk_hw *hw)
apll_mask = EN_APLL_LOCKED << clk->enable_bit;
r = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
r = omap2xxx_cm_get_pll_status();
return ((r & apll_mask) == apll_mask) ? true : false;
}
@ -126,7 +126,7 @@ u32 omap2xxx_get_apll_clkin(void)
{
u32 aplls, srate = 0;
aplls = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL1);
aplls = omap2xxx_cm_get_pll_config();
aplls &= OMAP24XX_APLLS_CLKIN_MASK;
aplls >>= OMAP24XX_APLLS_CLKIN_SHIFT;

11
arch/arm/mach-omap2/clkt2xxx_dpllcore.c
View File

@ -60,8 +60,7 @@ unsigned long omap2xxx_clk_get_core_rate(void)
core_clk = omap2_get_dpll_rate(dpll_core_ck);
v = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
v &= OMAP24XX_CORE_CLK_SRC_MASK;
v = omap2xxx_cm_get_core_clk_src();
if (v == CORE_CLK_SRC_32K)
core_clk = 32768;
@ -79,8 +78,7 @@ static long omap2_dpllcore_round_rate(unsigned long target_rate)
{
u32 high, low, core_clk_src;
core_clk_src = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
core_clk_src &= OMAP24XX_CORE_CLK_SRC_MASK;
core_clk_src = omap2xxx_cm_get_core_clk_src();
if (core_clk_src == CORE_CLK_SRC_DPLL) { /* DPLL clockout */
high = curr_prcm_set->dpll_speed * 2;
@ -120,8 +118,7 @@ int omap2_reprogram_dpllcore(struct clk_hw *hw, unsigned long rate,
const struct dpll_data *dd;
cur_rate = omap2xxx_clk_get_core_rate();
mult = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
mult &= OMAP24XX_CORE_CLK_SRC_MASK;
mult = omap2xxx_cm_get_core_clk_src();
if ((rate == (cur_rate / 2)) && (mult == 2)) {
omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1);
@ -145,7 +142,7 @@ int omap2_reprogram_dpllcore(struct clk_hw *hw, unsigned long rate,
tmpset.cm_clksel1_pll &= ~(dd->mult_mask |
dd->div1_mask);
div = ((curr_prcm_set->xtal_speed / 1000000) - 1);
tmpset.cm_clksel2_pll = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
tmpset.cm_clksel2_pll = omap2xxx_cm_get_core_pll_config();
tmpset.cm_clksel2_pll &= ~OMAP24XX_CORE_CLK_SRC_MASK;
if (rate > low) {
tmpset.cm_clksel2_pll |= CORE_CLK_SRC_DPLL_X2;

24
arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c
View File

@ -98,7 +98,7 @@ long omap2_round_to_table_rate(struct clk_hw *hw, unsigned long rate,
int omap2_select_table_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
u32 cur_rate, done_rate, bypass = 0, tmp;
u32 cur_rate, done_rate, bypass = 0;
const struct prcm_config *prcm;
unsigned long found_speed = 0;
unsigned long flags;
@ -141,23 +141,11 @@ int omap2_select_table_rate(struct clk_hw *hw, unsigned long rate,
else
done_rate = CORE_CLK_SRC_DPLL;
/* MPU divider */
omap2_cm_write_mod_reg(prcm->cm_clksel_mpu, MPU_MOD, CM_CLKSEL);
/* dsp + iva1 div(2420), iva2.1(2430) */
omap2_cm_write_mod_reg(prcm->cm_clksel_dsp,
OMAP24XX_DSP_MOD, CM_CLKSEL);
omap2_cm_write_mod_reg(prcm->cm_clksel_gfx, GFX_MOD, CM_CLKSEL);
/* Major subsystem dividers */
tmp = omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL1) & OMAP24XX_CLKSEL_DSS2_MASK;
omap2_cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD,
CM_CLKSEL1);
if (cpu_is_omap2430())
omap2_cm_write_mod_reg(prcm->cm_clksel_mdm,
OMAP2430_MDM_MOD, CM_CLKSEL);
omap2xxx_cm_set_mod_dividers(prcm->cm_clksel_mpu,
prcm->cm_clksel_dsp,
prcm->cm_clksel_gfx,
prcm->cm_clksel1_core,
prcm->cm_clksel_mdm);
/* x2 to enter omap2xxx_sdrc_init_params() */
omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1);

38
arch/arm/mach-omap2/clock.c
View File

@ -542,6 +542,44 @@ int omap2_clk_disable_autoidle_all(void)
return 0;
}
/**
* omap2_clk_deny_idle - disable autoidle on an OMAP clock
* @clk: struct clk * to disable autoidle for
*
* Disable autoidle on an OMAP clock.
*/
int omap2_clk_deny_idle(struct clk *clk)
{
struct clk_hw_omap *c;
if (__clk_get_flags(clk) & CLK_IS_BASIC)
return -EINVAL;
c = to_clk_hw_omap(__clk_get_hw(clk));
if (c->ops && c->ops->deny_idle)
c->ops->deny_idle(c);
return 0;
}
/**
* omap2_clk_allow_idle - enable autoidle on an OMAP clock
* @clk: struct clk * to enable autoidle for
*
* Enable autoidle on an OMAP clock.
*/
int omap2_clk_allow_idle(struct clk *clk)
{
struct clk_hw_omap *c;
if (__clk_get_flags(clk) & CLK_IS_BASIC)
return -EINVAL;
c = to_clk_hw_omap(__clk_get_hw(clk));
if (c->ops && c->ops->allow_idle)
c->ops->allow_idle(c);
return 0;
}
/**
* omap2_clk_enable_init_clocks - prepare & enable a list of clocks
* @clk_names: ptr to an array of strings of clock names to enable

2
arch/arm/mach-omap2/clock.h
View File

@ -411,6 +411,8 @@ void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
void omap2_init_clk_hw_omap_clocks(struct clk *clk);
int omap2_clk_enable_autoidle_all(void);
int omap2_clk_disable_autoidle_all(void);
int omap2_clk_allow_idle(struct clk *clk);
int omap2_clk_deny_idle(struct clk *clk);
void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks);
int omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name);
void omap2_clk_print_new_rates(const char *hfclkin_ck_name,

67
arch/arm/mach-omap2/cm2xxx.c
View File

@ -327,6 +327,73 @@ struct clkdm_ops omap2_clkdm_operations = {
.clkdm_clk_disable = omap2xxx_clkdm_clk_disable,
};
int omap2xxx_cm_fclks_active(void)
{
u32 f1, f2;
f1 = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
f2 = omap2_cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
return (f1 | f2) ? 1 : 0;
}
int omap2xxx_cm_mpu_retention_allowed(void)
{
u32 l;
/* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */
l = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
if (l & (OMAP2420_EN_MMC_MASK | OMAP24XX_EN_UART2_MASK |
OMAP24XX_EN_UART1_MASK | OMAP24XX_EN_MCSPI2_MASK |
OMAP24XX_EN_MCSPI1_MASK | OMAP24XX_EN_DSS1_MASK))
return 0;
/* Check for UART3. */
l = omap2_cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
if (l & OMAP24XX_EN_UART3_MASK)
return 0;
return 1;
}
u32 omap2xxx_cm_get_core_clk_src(void)
{
u32 v;
v = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
v &= OMAP24XX_CORE_CLK_SRC_MASK;
return v;
}
u32 omap2xxx_cm_get_core_pll_config(void)
{
return omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL2);
}
u32 omap2xxx_cm_get_pll_config(void)
{
return omap2_cm_read_mod_reg(PLL_MOD, CM_CLKSEL1);
}
u32 omap2xxx_cm_get_pll_status(void)
{
return omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
}
void omap2xxx_cm_set_mod_dividers(u32 mpu, u32 dsp, u32 gfx, u32 core, u32 mdm)
{
u32 tmp;
omap2_cm_write_mod_reg(mpu, MPU_MOD, CM_CLKSEL);
omap2_cm_write_mod_reg(dsp, OMAP24XX_DSP_MOD, CM_CLKSEL);
omap2_cm_write_mod_reg(gfx, GFX_MOD, CM_CLKSEL);
tmp = omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL1) &
OMAP24XX_CLKSEL_DSS2_MASK;
omap2_cm_write_mod_reg(core | tmp, CORE_MOD, CM_CLKSEL1);
if (cpu_is_omap2430())
omap2_cm_write_mod_reg(mdm, OMAP2430_MDM_MOD, CM_CLKSEL);
}
/*
*
*/

8
arch/arm/mach-omap2/cm2xxx.h
View File

@ -62,6 +62,14 @@ extern int omap2xxx_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id,
u8 idlest_shift);
extern int omap2xxx_cm_split_idlest_reg(void __iomem *idlest_reg,
s16 *prcm_inst, u8 *idlest_reg_id);
extern int omap2xxx_cm_fclks_active(void);
extern int omap2xxx_cm_mpu_retention_allowed(void);
extern u32 omap2xxx_cm_get_core_clk_src(void);
extern u32 omap2xxx_cm_get_core_pll_config(void);
extern u32 omap2xxx_cm_get_pll_config(void);
extern u32 omap2xxx_cm_get_pll_status(void);
extern void omap2xxx_cm_set_mod_dividers(u32 mpu, u32 dsp, u32 gfx, u32 core,
u32 mdm);
extern int __init omap2xxx_cm_init(void);

22
arch/arm/mach-omap2/cm3xxx.c
View File

@ -636,6 +636,28 @@ void omap3_cm_restore_context(void)
OMAP3_CM_CLKOUT_CTRL_OFFSET);
}
void omap3_cm_save_scratchpad_contents(u32 *ptr)
{
*ptr++ = omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
*ptr++ = omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
*ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
/*
* As per erratum i671, ROM code does not respect the PER DPLL
* programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1.
* Then, in anycase, clear these bits to avoid extra latencies.
*/
*ptr++ = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE) &
~OMAP3430_AUTO_PERIPH_DPLL_MASK;
*ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL);
*ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL);
*ptr++ = omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3);
*ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL);
*ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL);
*ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL);
*ptr++ = omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL);
}
/*
*
*/

1
arch/arm/mach-omap2/cm3xxx.h
View File

@ -83,6 +83,7 @@ extern int omap3xxx_cm_split_idlest_reg(void __iomem *idlest_reg,
extern void omap3_cm_save_context(void);
extern void omap3_cm_restore_context(void);
extern void omap3_cm_save_scratchpad_contents(u32 *ptr);
extern int __init omap3xxx_cm_init(void);

54
arch/arm/mach-omap2/control.c
View File

@ -46,17 +46,7 @@ struct omap3_scratchpad {
struct omap3_scratchpad_prcm_block {
u32 prm_clksrc_ctrl;
u32 prm_clksel;
u32 cm_clksel_core;
u32 cm_clksel_wkup;
u32 cm_clken_pll;
u32 cm_autoidle_pll;
u32 cm_clksel1_pll;
u32 cm_clksel2_pll;
u32 cm_clksel3_pll;
u32 cm_clken_pll_mpu;
u32 cm_autoidle_pll_mpu;
u32 cm_clksel1_pll_mpu;
u32 cm_clksel2_pll_mpu;
u32 cm_contents[11];
u32 prcm_block_size;
};
@ -347,34 +337,9 @@ void omap3_save_scratchpad_contents(void)
prcm_block_contents.prm_clksel =
omap2_prm_read_mod_reg(OMAP3430_CCR_MOD,
OMAP3_PRM_CLKSEL_OFFSET);
prcm_block_contents.cm_clksel_core =
omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
prcm_block_contents.cm_clksel_wkup =
omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
prcm_block_contents.cm_clken_pll =
omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN);
/*
* As per erratum i671, ROM code does not respect the PER DPLL
* programming scheme if CM_AUTOIDLE_PLL..AUTO_PERIPH_DPLL == 1.
* Then, in anycase, clear these bits to avoid extra latencies.
*/
prcm_block_contents.cm_autoidle_pll =
omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE) &
~OMAP3430_AUTO_PERIPH_DPLL_MASK;
prcm_block_contents.cm_clksel1_pll =
omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL);
prcm_block_contents.cm_clksel2_pll =
omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL);
prcm_block_contents.cm_clksel3_pll =
omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3);
prcm_block_contents.cm_clken_pll_mpu =
omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL);
prcm_block_contents.cm_autoidle_pll_mpu =
omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL);
prcm_block_contents.cm_clksel1_pll_mpu =
omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL);
prcm_block_contents.cm_clksel2_pll_mpu =
omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL);
omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
prcm_block_contents.prcm_block_size = 0x0;
/* Populate the SDRC block contents */
@ -604,4 +569,15 @@ int omap3_ctrl_save_padconf(void)
return 0;
}
/**
* omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
*
* Sets the bootmode for IVA2 to idle. This is needed by the PM code to
* force disable IVA2 so that it does not prevent any low-power states.
*/
void omap3_ctrl_set_iva_bootmode_idle(void)
{
omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
OMAP343X_CONTROL_IVA2_BOOTMOD);
}
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */

1
arch/arm/mach-omap2/control.h
View File

@ -427,6 +427,7 @@ extern void omap_ctrl_write_dsp_boot_addr(u32 bootaddr);
extern void omap_ctrl_write_dsp_boot_mode(u8 bootmode);
extern void omap3630_ctrl_disable_rta(void);
extern int omap3_ctrl_save_padconf(void);
extern void omap3_ctrl_set_iva_bootmode_idle(void);
extern void omap2_set_globals_control(void __iomem *ctrl,
void __iomem *ctrl_pad);
#else

16
arch/arm/mach-omap2/mcbsp.c
View File

@ -25,6 +25,7 @@
#include "soc.h"
#include "omap_device.h"
#include "clock.h"
/*
* FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
@ -33,22 +34,18 @@
#include "cm3xxx.h"
#include "cm-regbits-34xx.h"
static struct clk *mcbsp_iclks[5];
static int omap3_enable_st_clock(unsigned int id, bool enable)
{
unsigned int w;
/*
* Sidetone uses McBSP ICLK - which must not idle when sidetones
* are enabled or sidetones start sounding ugly.
*/
w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
if (enable)
w &= ~(1 << (id - 2));
return omap2_clk_deny_idle(mcbsp_iclks[id]);
else
w |= 1 << (id - 2);
omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);
return 0;
return omap2_clk_allow_idle(mcbsp_iclks[id]);
}
static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
@ -58,6 +55,7 @@ static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
struct omap_hwmod *oh_device[2];
struct omap_mcbsp_platform_data *pdata = NULL;
struct platform_device *pdev;
char clk_name[11];
sscanf(oh->name, "mcbsp%d", &id);
@ -99,6 +97,8 @@ static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
oh_device[1] = omap_hwmod_lookup((
(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
pdata->enable_st_clock = omap3_enable_st_clock;
sprintf(clk_name, "mcbsp%d_ick", id);
mcbsp_iclks[id] = clk_get(NULL, clk_name);
count++;
}
pdev = omap_device_build_ss(name, id, oh_device, count, pdata,

24
arch/arm/mach-omap2/pm24xx.c
View File

@ -62,16 +62,6 @@ static struct clockdomain *dsp_clkdm, *mpu_clkdm, *wkup_clkdm, *gfx_clkdm;
static struct clk *osc_ck, *emul_ck;
static int omap2_fclks_active(void)
{
u32 f1, f2;
f1 = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
f2 = omap2_cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
return (f1 | f2) ? 1 : 0;
}
static int omap2_enter_full_retention(void)
{
u32 l;
@ -142,17 +132,7 @@ static int sti_console_enabled;
static int omap2_allow_mpu_retention(void)
{
u32 l;
/* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */
l = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
if (l & (OMAP2420_EN_MMC_MASK | OMAP24XX_EN_UART2_MASK |
OMAP24XX_EN_UART1_MASK | OMAP24XX_EN_MCSPI2_MASK |
OMAP24XX_EN_MCSPI1_MASK | OMAP24XX_EN_DSS1_MASK))
return 0;
/* Check for UART3. */
l = omap2_cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
if (l & OMAP24XX_EN_UART3_MASK)
if (!omap2xxx_cm_mpu_retention_allowed())
return 0;
if (sti_console_enabled)
return 0;
@ -188,7 +168,7 @@ static void omap2_enter_mpu_retention(void)
static int omap2_can_sleep(void)
{
if (omap2_fclks_active())
if (omap2xxx_cm_fclks_active())
return 0;
if (__clk_is_enabled(osc_ck))
return 0;

3
arch/arm/mach-omap2/pm34xx.c
View File

@ -430,8 +430,7 @@ static void __init omap3_iva_idle(void)
OMAP3430_IVA2_MOD, CM_FCLKEN);
/* Set IVA2 boot mode to 'idle' */
omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
OMAP343X_CONTROL_IVA2_BOOTMOD);
omap3_ctrl_set_iva_bootmode_idle();
/* Un-reset IVA2 */
omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);