diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
| commit | 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch) | |
| tree | fa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/clk/ti | |
| parent | d4e493caf788ef44982e131ff9c786546904d934 (diff) | |
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/clk/ti')
| -rw-r--r-- | drivers/clk/ti/apll.c | 2 | ||||
| -rw-r--r-- | drivers/clk/ti/clk-814x.c | 4 | ||||
| -rw-r--r-- | drivers/clk/ti/dpll3xxx.c | 28 |
3 files changed, 31 insertions, 3 deletions
diff --git a/drivers/clk/ti/apll.c b/drivers/clk/ti/apll.c index f3eab6e79..b336a8c11 100644 --- a/drivers/clk/ti/apll.c +++ b/drivers/clk/ti/apll.c @@ -323,7 +323,7 @@ static void omap2_apll_deny_idle(struct clk_hw_omap *clk) omap2_apll_set_autoidle(clk, OMAP2_APLL_AUTOIDLE_DISABLE); } -static struct clk_hw_omap_ops omap2_apll_hwops = { +static const struct clk_hw_omap_ops omap2_apll_hwops = { .allow_idle = &omap2_apll_allow_idle, .deny_idle = &omap2_apll_deny_idle, }; diff --git a/drivers/clk/ti/clk-814x.c b/drivers/clk/ti/clk-814x.c index e17292079..9e85fcc74 100644 --- a/drivers/clk/ti/clk-814x.c +++ b/drivers/clk/ti/clk-814x.c @@ -14,10 +14,14 @@ static struct ti_dt_clk dm814_clks[] = { DT_CLK(NULL, "devosc_ck", "devosc_ck"), DT_CLK(NULL, "mpu_ck", "mpu_ck"), DT_CLK(NULL, "sysclk4_ck", "sysclk4_ck"), + DT_CLK(NULL, "sysclk5_ck", "sysclk5_ck"), DT_CLK(NULL, "sysclk6_ck", "sysclk6_ck"), + DT_CLK(NULL, "sysclk8_ck", "sysclk8_ck"), DT_CLK(NULL, "sysclk10_ck", "sysclk10_ck"), DT_CLK(NULL, "sysclk18_ck", "sysclk18_ck"), DT_CLK(NULL, "timer_sys_ck", "devosc_ck"), + DT_CLK(NULL, "timer1_fck", "timer1_fck"), + DT_CLK(NULL, "timer2_fck", "timer2_fck"), DT_CLK(NULL, "cpsw_125mhz_gclk", "cpsw_125mhz_gclk"), DT_CLK(NULL, "cpsw_cpts_rft_clk", "cpsw_cpts_rft_clk"), { .node_name = NULL }, diff --git a/drivers/clk/ti/dpll3xxx.c b/drivers/clk/ti/dpll3xxx.c index f4dec00fb..cc739291a 100644 --- a/drivers/clk/ti/dpll3xxx.c +++ b/drivers/clk/ti/dpll3xxx.c @@ -305,8 +305,9 @@ static void _lookup_sddiv(struct clk_hw_omap *clk, u8 *sd_div, u16 m, u8 n) static int omap3_noncore_dpll_program(struct clk_hw_omap *clk, u16 freqsel) { struct dpll_data *dd = clk->dpll_data; - u8 dco, sd_div; + u8 dco, sd_div, ai = 0; u32 v; + bool errata_i810; /* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */ _omap3_noncore_dpll_bypass(clk); @@ -350,6 +351,25 @@ static int omap3_noncore_dpll_program(struct clk_hw_omap *clk, u16 freqsel) v |= sd_div << __ffs(dd->sddiv_mask); } + /* + * Errata i810 - DPLL controller can get stuck while transitioning + * to a power saving state. Software must ensure the DPLL can not + * transition to a low power state while changing M/N values. + * Easiest way to accomplish this is to prevent DPLL autoidle + * before doing the M/N re-program. + */ + errata_i810 = ti_clk_get_features()->flags & TI_CLK_ERRATA_I810; + + if (errata_i810) { + ai = omap3_dpll_autoidle_read(clk); + if (ai) { + omap3_dpll_deny_idle(clk); + + /* OCP barrier */ + omap3_dpll_autoidle_read(clk); + } + } + ti_clk_ll_ops->clk_writel(v, dd->mult_div1_reg); /* Set 4X multiplier and low-power mode */ @@ -379,6 +399,9 @@ static int omap3_noncore_dpll_program(struct clk_hw_omap *clk, u16 freqsel) _omap3_noncore_dpll_lock(clk); + if (errata_i810 && ai) + omap3_dpll_allow_idle(clk); + return 0; } @@ -437,7 +460,8 @@ int omap3_noncore_dpll_enable(struct clk_hw *hw) parent = clk_hw_get_parent(hw); - if (clk_hw_get_rate(hw) == clk_get_rate(dd->clk_bypass)) { + if (clk_hw_get_rate(hw) == + clk_hw_get_rate(__clk_get_hw(dd->clk_bypass))) { WARN_ON(parent != __clk_get_hw(dd->clk_bypass)); r = _omap3_noncore_dpll_bypass(clk); } else { |