| Message ID | 20180419071942.14828-1-sebastien.szymanski@armadeus.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2,1/2] cpufreq: imx6q: check speed grades for i.MX6ULL | expand |
On Thu, Apr 19, 2018 at 12:49 PM, Sébastien Szymanski <sebastien.szymanski@armadeus.com> wrote: > Check the max speed supported from the fuses for i.MX6ULL and update the > operating points table accordingly. > > Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com> > --- > > Changes for v2: > - none Please cc all the maintainers present in MAINTAINERS file. You missed cc'ing me and I missed V1 earlier. > drivers/cpufreq/imx6q-cpufreq.c | 29 +++++++++++++++++++++++------ > 1 file changed, 23 insertions(+), 6 deletions(-) > > diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c > index 83cf631fc9bc..f094687cae52 100644 > --- a/drivers/cpufreq/imx6q-cpufreq.c > +++ b/drivers/cpufreq/imx6q-cpufreq.c > @@ -266,6 +266,8 @@ static void imx6q_opp_check_speed_grading(struct device *dev) > } > > #define OCOTP_CFG3_6UL_SPEED_696MHZ 0x2 > +#define OCOTP_CFG3_6ULL_SPEED_792MHZ 0x2 > +#define OCOTP_CFG3_6ULL_SPEED_900MHZ 0x3 Looking at the wording everywhere, this represents the maximum supported frequency ? In that case ... > > static void imx6ul_opp_check_speed_grading(struct device *dev) > { > @@ -287,16 +289,30 @@ static void imx6ul_opp_check_speed_grading(struct device *dev) > * Speed GRADING[1:0] defines the max speed of ARM: > * 2b'00: Reserved; > * 2b'01: 528000000Hz; > - * 2b'10: 696000000Hz; > - * 2b'11: Reserved; > + * 2b'10: 696000000Hz on i.MX6UL, 792000000Hz on i.MX6ULL; > + * 2b'11: 900000000Hz on i.MX6ULL only; > * We need to set the max speed of ARM according to fuse map. > */ > val = readl_relaxed(base + OCOTP_CFG3); > val >>= OCOTP_CFG3_SPEED_SHIFT; > val &= 0x3; > - if (val != OCOTP_CFG3_6UL_SPEED_696MHZ) > - if (dev_pm_opp_disable(dev, 696000000)) > - dev_warn(dev, "failed to disable 696MHz OPP\n"); > + > + if (of_machine_is_compatible("fsl,imx6ul")) { > + if (val != OCOTP_CFG3_6UL_SPEED_696MHZ) > + if (dev_pm_opp_disable(dev, 696000000)) > + dev_warn(dev, "failed to disable 696MHz OPP\n"); > + } > + > + if (of_machine_is_compatible("fsl,imx6ull")) { > + if (val != OCOTP_CFG3_6ULL_SPEED_792MHZ) > + if (dev_pm_opp_disable(dev, 792000000)) > + dev_warn(dev, "failed to disable 792MHz OPP\n"); > + > + if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ) > + if (dev_pm_opp_disable(dev, 900000000)) > + dev_warn(dev, "failed to disable 900MHz OPP\n"); ... this looks wrong to me as you will end up disabling 792 MHz if max speed is 900 MHz. > + } > + > iounmap(base); > put_node: > of_node_put(np); > @@ -356,7 +372,8 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) > goto put_reg; > } > > - if (of_machine_is_compatible("fsl,imx6ul")) > + if (of_machine_is_compatible("fsl,imx6ul") || > + of_machine_is_compatible("fsl,imx6ull")) > imx6ul_opp_check_speed_grading(cpu_dev); > else > imx6q_opp_check_speed_grading(cpu_dev); > -- > 2.16.1 >
On 04/19/2018 11:09 AM, Viresh Kumar wrote: > On Thu, Apr 19, 2018 at 12:49 PM, Sébastien Szymanski > <sebastien.szymanski@armadeus.com> wrote: >> Check the max speed supported from the fuses for i.MX6ULL and update the >> operating points table accordingly. >> >> Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com> >> --- >> >> Changes for v2: >> - none > > Please cc all the maintainers present in MAINTAINERS file. You missed cc'ing me > and I missed V1 earlier. Ok. > >> drivers/cpufreq/imx6q-cpufreq.c | 29 +++++++++++++++++++++++------ >> 1 file changed, 23 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c >> index 83cf631fc9bc..f094687cae52 100644 >> --- a/drivers/cpufreq/imx6q-cpufreq.c >> +++ b/drivers/cpufreq/imx6q-cpufreq.c >> @@ -266,6 +266,8 @@ static void imx6q_opp_check_speed_grading(struct device *dev) >> } >> >> #define OCOTP_CFG3_6UL_SPEED_696MHZ 0x2 >> +#define OCOTP_CFG3_6ULL_SPEED_792MHZ 0x2 >> +#define OCOTP_CFG3_6ULL_SPEED_900MHZ 0x3 > > Looking at the wording everywhere, this represents the maximum > supported frequency ? Yes. > In that case ... > >> >> static void imx6ul_opp_check_speed_grading(struct device *dev) >> { >> @@ -287,16 +289,30 @@ static void imx6ul_opp_check_speed_grading(struct device *dev) >> * Speed GRADING[1:0] defines the max speed of ARM: >> * 2b'00: Reserved; >> * 2b'01: 528000000Hz; >> - * 2b'10: 696000000Hz; >> - * 2b'11: Reserved; >> + * 2b'10: 696000000Hz on i.MX6UL, 792000000Hz on i.MX6ULL; >> + * 2b'11: 900000000Hz on i.MX6ULL only; >> * We need to set the max speed of ARM according to fuse map. >> */ >> val = readl_relaxed(base + OCOTP_CFG3); >> val >>= OCOTP_CFG3_SPEED_SHIFT; >> val &= 0x3; >> - if (val != OCOTP_CFG3_6UL_SPEED_696MHZ) >> - if (dev_pm_opp_disable(dev, 696000000)) >> - dev_warn(dev, "failed to disable 696MHz OPP\n"); >> + >> + if (of_machine_is_compatible("fsl,imx6ul")) { >> + if (val != OCOTP_CFG3_6UL_SPEED_696MHZ) >> + if (dev_pm_opp_disable(dev, 696000000)) >> + dev_warn(dev, "failed to disable 696MHz OPP\n"); >> + } >> + >> + if (of_machine_is_compatible("fsl,imx6ull")) { >> + if (val != OCOTP_CFG3_6ULL_SPEED_792MHZ) >> + if (dev_pm_opp_disable(dev, 792000000)) >> + dev_warn(dev, "failed to disable 792MHz OPP\n"); >> + >> + if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ) >> + if (dev_pm_opp_disable(dev, 900000000)) >> + dev_warn(dev, "failed to disable 900MHz OPP\n"); > > ... this looks wrong to me as you will end up disabling 792 MHz if max speed is > 900 MHz. The datasheet of the 900 MHz i.MX6ULL version [1] does not list 792 MHz as an operating range, that's why 792 MHz is disabled when max speed is 900 MHz. [1] https://www.nxp.com/docs/en/data-sheet/IMX6ULLCEC.pdf (page 24, table 10. "Operating Ranges") Regards, > >> + } >> + >> iounmap(base); >> put_node: >> of_node_put(np); >> @@ -356,7 +372,8 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) >> goto put_reg; >> } >> >> - if (of_machine_is_compatible("fsl,imx6ul")) >> + if (of_machine_is_compatible("fsl,imx6ul") || >> + of_machine_is_compatible("fsl,imx6ull")) >> imx6ul_opp_check_speed_grading(cpu_dev); >> else >> imx6q_opp_check_speed_grading(cpu_dev); >> -- >> 2.16.1 >>
diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index 83cf631fc9bc..f094687cae52 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -266,6 +266,8 @@ static void imx6q_opp_check_speed_grading(struct device *dev) } #define OCOTP_CFG3_6UL_SPEED_696MHZ 0x2 +#define OCOTP_CFG3_6ULL_SPEED_792MHZ 0x2 +#define OCOTP_CFG3_6ULL_SPEED_900MHZ 0x3 static void imx6ul_opp_check_speed_grading(struct device *dev) { @@ -287,16 +289,30 @@ static void imx6ul_opp_check_speed_grading(struct device *dev) * Speed GRADING[1:0] defines the max speed of ARM: * 2b'00: Reserved; * 2b'01: 528000000Hz; - * 2b'10: 696000000Hz; - * 2b'11: Reserved; + * 2b'10: 696000000Hz on i.MX6UL, 792000000Hz on i.MX6ULL; + * 2b'11: 900000000Hz on i.MX6ULL only; * We need to set the max speed of ARM according to fuse map. */ val = readl_relaxed(base + OCOTP_CFG3); val >>= OCOTP_CFG3_SPEED_SHIFT; val &= 0x3; - if (val != OCOTP_CFG3_6UL_SPEED_696MHZ) - if (dev_pm_opp_disable(dev, 696000000)) - dev_warn(dev, "failed to disable 696MHz OPP\n"); + + if (of_machine_is_compatible("fsl,imx6ul")) { + if (val != OCOTP_CFG3_6UL_SPEED_696MHZ) + if (dev_pm_opp_disable(dev, 696000000)) + dev_warn(dev, "failed to disable 696MHz OPP\n"); + } + + if (of_machine_is_compatible("fsl,imx6ull")) { + if (val != OCOTP_CFG3_6ULL_SPEED_792MHZ) + if (dev_pm_opp_disable(dev, 792000000)) + dev_warn(dev, "failed to disable 792MHz OPP\n"); + + if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ) + if (dev_pm_opp_disable(dev, 900000000)) + dev_warn(dev, "failed to disable 900MHz OPP\n"); + } + iounmap(base); put_node: of_node_put(np); @@ -356,7 +372,8 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) goto put_reg; } - if (of_machine_is_compatible("fsl,imx6ul")) + if (of_machine_is_compatible("fsl,imx6ul") || + of_machine_is_compatible("fsl,imx6ull")) imx6ul_opp_check_speed_grading(cpu_dev); else imx6q_opp_check_speed_grading(cpu_dev);
Check the max speed supported from the fuses for i.MX6ULL and update the operating points table accordingly. Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com> --- Changes for v2: - none drivers/cpufreq/imx6q-cpufreq.c | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-)