Merge tag 'for-v3.13-rc/hwmod-fixes-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into fixes
From Paul Walmsley:
ARM: OMAP2+: hwmod code/data: fixes for v3.13-rc
Fix a few hwmod code problems involving recovery with bad data and bad
IP block OCP reset handling. Also, fix the hwmod data to enable IP
block OCP reset for the OMAP USBHOST devices on OMAP3+.
Basic build, boot, and PM tests are available here:
http://www.pwsan.com/omap/testlogs/prcm_fixes_a_v3.13-rc/20131209030611/
* tag 'for-v3.13-rc/hwmod-fixes-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending:
ARM: OMAP2+: hwmod: Fix usage of invalid iclk / oclk when clock node is not present
ARM: OMAP3: hwmod data: Don't prevent RESET of USB Host module
ARM: OMAP2+: hwmod: Fix SOFTRESET logic
ARM: OMAP4+: hwmod data: Don't prevent RESET of USB Host module
Signed-off-by: Kevin Hilman <khilman@linaro.org>
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index ee655da..8a1b5e0 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -399,7 +399,7 @@
}
/**
- * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
+ * _set_softreset: set OCP_SYSCONFIG.SOFTRESET bit in @v
* @oh: struct omap_hwmod *
* @v: pointer to register contents to modify
*
@@ -427,6 +427,36 @@
}
/**
+ * _clear_softreset: clear OCP_SYSCONFIG.SOFTRESET bit in @v
+ * @oh: struct omap_hwmod *
+ * @v: pointer to register contents to modify
+ *
+ * Clear the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
+ * error or 0 upon success.
+ */
+static int _clear_softreset(struct omap_hwmod *oh, u32 *v)
+{
+ u32 softrst_mask;
+
+ if (!oh->class->sysc ||
+ !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
+ return -EINVAL;
+
+ if (!oh->class->sysc->sysc_fields) {
+ WARN(1,
+ "omap_hwmod: %s: sysc_fields absent for sysconfig class\n",
+ oh->name);
+ return -EINVAL;
+ }
+
+ softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift);
+
+ *v &= ~softrst_mask;
+
+ return 0;
+}
+
+/**
* _wait_softreset_complete - wait for an OCP softreset to complete
* @oh: struct omap_hwmod * to wait on
*
@@ -785,6 +815,7 @@
pr_warning("omap_hwmod: %s: cannot clk_get interface_clk %s\n",
oh->name, os->clk);
ret = -EINVAL;
+ continue;
}
os->_clk = c;
/*
@@ -821,6 +852,7 @@
pr_warning("omap_hwmod: %s: cannot clk_get opt_clk %s\n",
oh->name, oc->clk);
ret = -EINVAL;
+ continue;
}
oc->_clk = c;
/*
@@ -1911,6 +1943,12 @@
ret = _set_softreset(oh, &v);
if (ret)
goto dis_opt_clks;
+
+ _write_sysconfig(v, oh);
+ ret = _clear_softreset(oh, &v);
+ if (ret)
+ goto dis_opt_clks;
+
_write_sysconfig(v, oh);
if (oh->class->sysc->srst_udelay)
@@ -3227,6 +3265,11 @@
goto error;
_write_sysconfig(v, oh);
+ ret = _clear_softreset(oh, &v);
+ if (ret)
+ goto error;
+ _write_sysconfig(v, oh);
+
error:
return ret;
}
diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
index 9e56fab..d337429 100644
--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -1943,7 +1943,8 @@
.syss_offs = 0x0014,
.sysc_flags = (SYSC_HAS_MIDLEMODE | SYSC_HAS_CLOCKACTIVITY |
SYSC_HAS_SIDLEMODE | SYSC_HAS_ENAWAKEUP |
- SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE),
+ SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE |
+ SYSS_HAS_RESET_STATUS),
.idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
MSTANDBY_FORCE | MSTANDBY_NO | MSTANDBY_SMART),
.sysc_fields = &omap_hwmod_sysc_type1,
@@ -2021,15 +2022,7 @@
* hence HWMOD_SWSUP_MSTANDBY
*/
- /*
- * During system boot; If the hwmod framework resets the module
- * the module will have smart idle settings; which can lead to deadlock
- * (above Errata Id:i660); so, dont reset the module during boot;
- * Use HWMOD_INIT_NO_RESET.
- */
-
- .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY |
- HWMOD_INIT_NO_RESET,
+ .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY,
};
/*
diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 1e5b12c..3318cae9 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -2937,7 +2937,7 @@
.sysc_offs = 0x0010,
.syss_offs = 0x0014,
.sysc_flags = (SYSC_HAS_MIDLEMODE | SYSC_HAS_SIDLEMODE |
- SYSC_HAS_SOFTRESET),
+ SYSC_HAS_SOFTRESET | SYSC_HAS_RESET_STATUS),
.idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
SIDLE_SMART_WKUP | MSTANDBY_FORCE | MSTANDBY_NO |
MSTANDBY_SMART | MSTANDBY_SMART_WKUP),
@@ -3001,15 +3001,7 @@
* hence HWMOD_SWSUP_MSTANDBY
*/
- /*
- * During system boot; If the hwmod framework resets the module
- * the module will have smart idle settings; which can lead to deadlock
- * (above Errata Id:i660); so, dont reset the module during boot;
- * Use HWMOD_INIT_NO_RESET.
- */
-
- .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY |
- HWMOD_INIT_NO_RESET,
+ .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY,
};
/*
diff --git a/arch/arm/mach-omap2/omap_hwmod_54xx_data.c b/arch/arm/mach-omap2/omap_hwmod_54xx_data.c
index 9e08d69..e297d62 100644
--- a/arch/arm/mach-omap2/omap_hwmod_54xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_54xx_data.c
@@ -1544,7 +1544,8 @@
.rev_offs = 0x0000,
.sysc_offs = 0x0010,
.sysc_flags = (SYSC_HAS_MIDLEMODE | SYSC_HAS_RESET_STATUS |
- SYSC_HAS_SIDLEMODE | SYSC_HAS_SOFTRESET),
+ SYSC_HAS_SIDLEMODE | SYSC_HAS_SOFTRESET |
+ SYSC_HAS_RESET_STATUS),
.idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
SIDLE_SMART_WKUP | MSTANDBY_FORCE | MSTANDBY_NO |
MSTANDBY_SMART | MSTANDBY_SMART_WKUP),
@@ -1598,15 +1599,7 @@
* hence HWMOD_SWSUP_MSTANDBY
*/
- /*
- * During system boot; If the hwmod framework resets the module
- * the module will have smart idle settings; which can lead to deadlock
- * (above Errata Id:i660); so, dont reset the module during boot;
- * Use HWMOD_INIT_NO_RESET.
- */
-
- .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY |
- HWMOD_INIT_NO_RESET,
+ .flags = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY,
.main_clk = "l3init_60m_fclk",
.prcm = {
.omap4 = {