| Message ID | 1369379407-12764-1-git-send-email-acourbot@nvidia.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On 05/24/2013 01:10 AM, Alexandre Courbot wrote: > Tegra has a blink timer register that allows to modulate the > clk_32k clock before outputting it. Since clk_32k is presented to the > kernel as a fixed clock, make sure this register does not tamper with > the clock frequency and that clk_32k is outputted as-is, similarly to > what is done on t20 and t30. drivers/clk changes should go to Mike Turquette now that there aren't any inter-dependencies between core Tegra and Tegra clk driver patches. I CC'd him here, but perhaps he'll want this resent if he doesn't have the original email still. Acked-by: Stephen Warren <swarren@nvidia.com> -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sat, May 25, 2013 at 12:30 AM, Stephen Warren <swarren@wwwdotorg.org> wrote: > On 05/24/2013 01:10 AM, Alexandre Courbot wrote: >> Tegra has a blink timer register that allows to modulate the >> clk_32k clock before outputting it. Since clk_32k is presented to the >> kernel as a fixed clock, make sure this register does not tamper with >> the clock frequency and that clk_32k is outputted as-is, similarly to >> what is done on t20 and t30. > > drivers/clk changes should go to Mike Turquette now that there aren't > any inter-dependencies between core Tegra and Tegra clk driver patches. > > I CC'd him here, but perhaps he'll want this resent if he doesn't have > the original email still. I just resent the patch to make things easier. Thanks, Alex. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c index d78e16e..dc76d67 100644 --- a/drivers/clk/tegra/clk-tegra114.c +++ b/drivers/clk/tegra/clk-tegra114.c @@ -127,6 +127,7 @@ #define PMC_DPD_PADS_ORIDE_BLINK_ENB 20 #define PMC_CTRL 0 #define PMC_CTRL_BLINK_ENB 7 +#define PMC_BLINK_TIMER 0x40 #define OSC_CTRL 0x50 #define OSC_CTRL_OSC_FREQ_SHIFT 28 @@ -1625,6 +1626,8 @@ static void __init tegra114_pmc_clk_init(void __iomem *pmc_base) clks[clk_out_3] = clk; /* blink */ + /* clear the blink timer register to directly output clk_32k */ + writel_relaxed(0, pmc_base + PMC_BLINK_TIMER); clk = clk_register_gate(NULL, "blink_override", "clk_32k", 0, pmc_base + PMC_DPD_PADS_ORIDE, PMC_DPD_PADS_ORIDE_BLINK_ENB, 0, NULL);
Tegra has a blink timer register that allows to modulate the clk_32k clock before outputting it. Since clk_32k is presented to the kernel as a fixed clock, make sure this register does not tamper with the clock frequency and that clk_32k is outputted as-is, similarly to what is done on t20 and t30. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> --- drivers/clk/tegra/clk-tegra114.c | 3 +++ 1 file changed, 3 insertions(+)