[PATCHv5 15/35] ARM: OMAP2+: control: determine control module base address from DT
Tero Kristo
t-kristo at ti.com
Fri Mar 20 11:44:26 PDT 2015
There is no need to provide the control module base address through a
low-level API from the low-level IO init, as this information is
available through DT. This patch adds a new API to initialize the
control module though, but mostly makes the old API obsolete. The
old API can be completely removed once OMAP3 is made DT only.
Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
arch/arm/mach-omap2/control.c | 49 +++++++++++++++++++++++++++++++++-----
arch/arm/mach-omap2/control.h | 2 ++
arch/arm/mach-omap2/io.c | 34 +++++++++++++-------------
arch/arm/mach-omap2/prm.h | 1 -
arch/arm/mach-omap2/prm_common.c | 5 ----
5 files changed, 61 insertions(+), 30 deletions(-)
diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c
index e881824..21ff32c 100644
--- a/arch/arm/mach-omap2/control.c
+++ b/arch/arm/mach-omap2/control.c
@@ -616,6 +616,7 @@ void __init omap3_ctrl_init(void)
struct control_init_data {
int index;
+ void __iomem *mem;
};
static struct control_init_data ctrl_data = {
@@ -627,10 +628,39 @@ static const struct of_device_id omap_scrm_dt_match_table[] = {
{ .compatible = "ti,am4-scrm", .data = &ctrl_data },
{ .compatible = "ti,omap2-scrm", .data = &ctrl_data },
{ .compatible = "ti,omap3-scrm", .data = &ctrl_data },
+ { .compatible = "ti,dm816-scrm", .data = &ctrl_data },
{ }
};
/**
+ * omap2_control_base_init - initialize iomappings for the control driver
+ *
+ * Detects and initializes the iomappings for the control driver, based
+ * on the DT data. Returns 0 in success, negative error value
+ * otherwise.
+ */
+int __init omap2_control_base_init(void)
+{
+ struct device_node *np;
+ const struct of_device_id *match;
+ struct control_init_data *data;
+ void __iomem *mem;
+
+ for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
+ data = (struct control_init_data *)match->data;
+
+ mem = of_iomap(np, 0);
+ if (!mem)
+ return -ENOMEM;
+
+ omap2_ctrl_base = mem;
+ data->mem = mem;
+ }
+
+ return 0;
+}
+
+/**
* omap_control_init - low level init for the control driver
*
* Initializes the low level clock infrastructure for control driver.
@@ -639,7 +669,6 @@ static const struct of_device_id omap_scrm_dt_match_table[] = {
int __init omap_control_init(void)
{
struct device_node *np;
- void __iomem *mem;
const struct of_device_id *match;
const struct omap_prcm_init_data *data;
int ret;
@@ -647,14 +676,22 @@ int __init omap_control_init(void)
for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
data = match->data;
- mem = of_iomap(np, 0);
- if (!mem)
- return -ENOMEM;
-
- ret = omap2_clk_provider_init(np, data->index, mem);
+ ret = omap2_clk_provider_init(np, data->index, data->mem);
if (ret)
return ret;
}
return 0;
}
+
+/**
+ * omap3_control_legacy_iomap_init - legacy iomap init for clock providers
+ *
+ * Legacy iomap init for clock provider. Needed only by legacy boot mode,
+ * where the base addresses are not parsed from DT, but still required
+ * by the clock driver to be setup properly.
+ */
+void __init omap3_control_legacy_iomap_init(void)
+{
+ omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base);
+}
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index baf5783..c1057eb 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -464,9 +464,11 @@ extern void omap_ctrl_write_dsp_boot_mode(u8 bootmode);
extern void omap3630_ctrl_disable_rta(void);
extern int omap3_ctrl_save_padconf(void);
void omap3_ctrl_init(void);
+int omap2_control_base_init(void);
int omap_control_init(void);
extern void omap2_set_globals_control(void __iomem *ctrl,
void __iomem *ctrl_pad);
+void __init omap3_control_legacy_iomap_init(void);
#else
#define omap_ctrl_base_get() 0
#define omap_ctrl_readb(x) 0
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 712dd42..622ee3b 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -384,8 +384,7 @@ void __init omap2420_init_early(void)
omap2_set_globals_tap(OMAP242X_CLASS, OMAP2_L4_IO_ADDRESS(0x48014000));
omap2_set_globals_sdrc(OMAP2_L3_IO_ADDRESS(OMAP2420_SDRC_BASE),
OMAP2_L3_IO_ADDRESS(OMAP2420_SMS_BASE));
- omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP242X_CTRL_BASE),
- NULL);
+ omap2_control_base_init();
omap2xxx_check_revision();
omap2xxx_prm_init();
omap2xxx_cm_init();
@@ -412,8 +411,7 @@ void __init omap2430_init_early(void)
omap2_set_globals_tap(OMAP243X_CLASS, OMAP2_L4_IO_ADDRESS(0x4900a000));
omap2_set_globals_sdrc(OMAP2_L3_IO_ADDRESS(OMAP243X_SDRC_BASE),
OMAP2_L3_IO_ADDRESS(OMAP243X_SMS_BASE));
- omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP243X_CTRL_BASE),
- NULL);
+ omap2_control_base_init();
omap2xxx_check_revision();
omap2xxx_prm_init();
omap2xxx_cm_init();
@@ -444,11 +442,15 @@ void __init omap3_init_early(void)
omap2_set_globals_tap(OMAP343X_CLASS, OMAP2_L4_IO_ADDRESS(0x4830A000));
omap2_set_globals_sdrc(OMAP2_L3_IO_ADDRESS(OMAP343X_SDRC_BASE),
OMAP2_L3_IO_ADDRESS(OMAP343X_SMS_BASE));
- omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE),
- NULL);
- /* XXX: remove these two once OMAP3 is DT only */
- omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP3430_PRM_BASE));
- omap2_set_globals_cm(OMAP2_L4_IO_ADDRESS(OMAP3430_CM_BASE), NULL);
+ /* XXX: remove these once OMAP3 is DT only */
+ if (!of_have_populated_dt()) {
+ omap2_set_globals_control(
+ OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE), NULL);
+ omap2_set_globals_prm(OMAP2_L4_IO_ADDRESS(OMAP3430_PRM_BASE));
+ omap2_set_globals_cm(OMAP2_L4_IO_ADDRESS(OMAP3430_CM_BASE),
+ NULL);
+ }
+ omap2_control_base_init();
omap3xxx_check_revision();
omap3xxx_check_features();
omap3xxx_prm_init();
@@ -459,7 +461,7 @@ void __init omap3_init_early(void)
omap3xxx_hwmod_init();
omap_hwmod_init_postsetup();
if (!of_have_populated_dt()) {
- omap3_prcm_legacy_iomaps_init();
+ omap3_control_legacy_iomap_init();
if (soc_is_am35xx())
omap_clk_soc_init = am35xx_clk_legacy_init;
else if (cpu_is_omap3630())
@@ -546,8 +548,7 @@ void __init ti814x_init_early(void)
{
omap2_set_globals_tap(TI814X_CLASS,
OMAP2_L4_IO_ADDRESS(TI81XX_TAP_BASE));
- omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(TI81XX_CTRL_BASE),
- NULL);
+ omap2_control_base_init();
omap3xxx_check_revision();
ti81xx_check_features();
am33xx_prm_init();
@@ -565,8 +566,7 @@ void __init ti816x_init_early(void)
{
omap2_set_globals_tap(TI816X_CLASS,
OMAP2_L4_IO_ADDRESS(TI81XX_TAP_BASE));
- omap2_set_globals_control(OMAP2_L4_IO_ADDRESS(TI81XX_CTRL_BASE),
- NULL);
+ omap2_control_base_init();
omap3xxx_check_revision();
ti81xx_check_features();
am33xx_prm_init();
@@ -586,8 +586,7 @@ void __init am33xx_init_early(void)
{
omap2_set_globals_tap(AM335X_CLASS,
AM33XX_L4_WK_IO_ADDRESS(AM33XX_TAP_BASE));
- omap2_set_globals_control(AM33XX_L4_WK_IO_ADDRESS(AM33XX_CTRL_BASE),
- NULL);
+ omap2_control_base_init();
omap3xxx_check_revision();
am33xx_check_features();
am33xx_prm_init();
@@ -610,8 +609,7 @@ void __init am43xx_init_early(void)
{
omap2_set_globals_tap(AM335X_CLASS,
AM33XX_L4_WK_IO_ADDRESS(AM33XX_TAP_BASE));
- omap2_set_globals_control(AM33XX_L4_WK_IO_ADDRESS(AM33XX_CTRL_BASE),
- NULL);
+ omap2_control_base_init();
omap3xxx_check_revision();
am33xx_check_features();
omap44xx_prm_init();
diff --git a/arch/arm/mach-omap2/prm.h b/arch/arm/mach-omap2/prm.h
index 6d0a808..6707333 100644
--- a/arch/arm/mach-omap2/prm.h
+++ b/arch/arm/mach-omap2/prm.h
@@ -21,7 +21,6 @@ extern u16 prm_features;
extern void omap2_set_globals_prm(void __iomem *prm);
int omap_prcm_init(void);
int omap2_prm_base_init(void);
-void omap3_prcm_legacy_iomaps_init(void);
# endif
/*
diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index b23d232..a943e14 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -722,11 +722,6 @@ int __init omap_prcm_init(void)
return 0;
}
-void __init omap3_prcm_legacy_iomaps_init(void)
-{
- omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap_ctrl_base_get());
-}
-
static int __init prm_late_init(void)
{
if (prm_ll_data->late_init)
--
1.7.9.5
More information about the linux-arm-kernel
mailing list