Thara Gopinath <[email protected]> writes: > This patch extends the smartreflex framework to support > OMAP4. The changes are minor like compiling smartreflex Kconfig > option for OMAP4 also, and a couple of OMAP4 checks in > the smartreflex framework. > > The change in sr_device.c where new logic has to be introduced > for reading the efuse registers are due to two reasons. > a. Currently in mainline OMAP4 control base offset is actually > from the mux/padconf module start. Hence a omap_ctrl_read will > not read from the correct offset for the efuse registers. > This is currently being fixed through modfications in the > control layer but till that is finalised, we will have to do > a ioremap of the general control module base and do a > __raw_read to retrieve the efuse values.
Is this the series posted by Santosh? [PATCH 0/4] omap4: Control module series > b. In OMAP4 the efuse registers are 24 bit aligned. Hence > a __raw_readl will fail for non-32 bit aligned address. > Hence the 8-bit read and shift. This should be commented in the code as well. > Signed-off-by: Thara Gopinath <[email protected]> > --- > > This patch has a checkpatch warning which has been already > acknowledged as a false positive by the checkpatch.pl > maintainer Andy Whitcroft > http://lkml.org/lkml/2010/8/18/123 > > arch/arm/mach-omap2/smartreflex.c | 7 +++++-- > arch/arm/mach-omap2/sr_device.c | 21 +++++++++++++++++++-- > arch/arm/plat-omap/Kconfig | 2 +- > 3 files changed, 25 insertions(+), 5 deletions(-) > > diff --git a/arch/arm/mach-omap2/smartreflex.c > b/arch/arm/mach-omap2/smartreflex.c > index bc611d1..2e13c96 100644 > --- a/arch/arm/mach-omap2/smartreflex.c > +++ b/arch/arm/mach-omap2/smartreflex.c > @@ -154,7 +154,10 @@ static void sr_set_clk_length(struct omap_sr *sr) > struct clk *sys_ck; > u32 sys_clk_speed; > > - sys_ck = clk_get(NULL, "sys_ck"); > + if (cpu_is_omap34xx()) > + sys_ck = clk_get(NULL, "sys_ck"); > + else > + sys_ck = clk_get(NULL, "sys_clkin_ck"); > sys_clk_speed = clk_get_rate(sys_ck); > clk_put(sys_ck); > > @@ -189,7 +192,7 @@ static void sr_set_regfields(struct omap_sr *sr) > * file or pmic specific data structure. In that case these structure > * fields will have to be populated using the pdata or pmic structure. > */ > - if (cpu_is_omap34xx()) { > + if (cpu_is_omap34xx() || cpu_is_omap44xx()) { > sr->err_weight = OMAP3430_SR_ERRWEIGHT; > sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT; > sr->accum_data = OMAP3430_SR_ACCUMDATA; > diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c > index 3bd0170..f0181d1 100644 > --- a/arch/arm/mach-omap2/sr_device.c > +++ b/arch/arm/mach-omap2/sr_device.c > @@ -20,6 +20,7 @@ > > #include <linux/err.h> > #include <linux/slab.h> > +#include <linux/io.h> > > #include <plat/control.h> > #include <plat/omap_hwmod.h> > @@ -41,6 +42,7 @@ static void __init sr_read_efuse(struct omap_sr_dev_data > *dev_data, > struct omap_sr_data *sr_data) > { > int i; > + void __iomem *ctrl_base; > > if (!dev_data || !dev_data->volts_supported || !dev_data->volt_data || > !dev_data->efuse_nvalues_offs) { > @@ -72,9 +74,24 @@ static void __init sr_read_efuse(struct omap_sr_dev_data > *dev_data, > dev_data->senpenable_shift); > } > > - for (i = 0; i < dev_data->volts_supported; i++) > - dev_data->volt_data[i].sr_nvalue = omap_ctrl_readl( > + if (cpu_is_omap44xx()) > + ctrl_base = ioremap(0x4A002000, SZ_1K); > + > + for (i = 0; i < dev_data->volts_supported; i++) { > + if (cpu_is_omap44xx()) { > + u16 offset = dev_data->efuse_nvalues_offs[i]; > + The comment about 24-bit aligned addresses from the changelog should go here too. > + dev_data->volt_data[i].sr_nvalue = > + __raw_readb(ctrl_base + offset) | > + __raw_readb(ctrl_base + offset + 1) << 8 | > + __raw_readb(ctrl_base + offset + 2) << 16; > + } else { > + dev_data->volt_data[i].sr_nvalue = omap_ctrl_readl( > dev_data->efuse_nvalues_offs[i]); > + } > + } > + if (cpu_is_omap44xx()) > + iounmap(ctrl_base); > } > > /* > diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig > index af7acc9..b4e9ac2 100644 > --- a/arch/arm/plat-omap/Kconfig > +++ b/arch/arm/plat-omap/Kconfig > @@ -37,7 +37,7 @@ config OMAP_DEBUG_LEDS > > config OMAP_SMARTREFLEX > bool "SmartReflex support" > - depends on ARCH_OMAP3 && PM > + depends on (ARCH_OMAP3 || ARCH_OMAP4) && PM > help > Say Y if you want to enable SmartReflex. Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
