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author | Thomas Gleixner | 2017-11-23 16:29:05 +0100 |
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committer | Thomas Gleixner | 2017-11-23 16:29:05 +0100 |
commit | 866c9b94ef968445c52214b3748ecc52a8491bca (patch) | |
tree | 1fd073acb9be8e89e77b35c41e2964ac6feabee6 /drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c | |
parent | timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD (diff) | |
parent | treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts (diff) | |
download | kernel-qcow2-linux-866c9b94ef968445c52214b3748ecc52a8491bca.tar.gz kernel-qcow2-linux-866c9b94ef968445c52214b3748ecc52a8491bca.tar.xz kernel-qcow2-linux-866c9b94ef968445c52214b3748ecc52a8491bca.zip |
Merge tag 'for-linus-timers-conversion-final-v4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into timers/urgent
Pull the last batch of manual timer conversions from Kees Cook:
- final batch of "non trivial" timer conversions (multi-tree dependencies,
things Coccinelle couldn't handle, etc).
- treewide conversions via Coccinelle, in 4 steps:
- DEFINE_TIMER() functions converted to struct timer_list * argument
- init_timer() -> setup_timer()
- setup_timer() -> timer_setup()
- setup_timer() -> timer_setup() (with a single embedded structure)
- deprecated timer API removals (init_timer(), setup_*timer())
- finalization of new API (remove global casts)
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c')
-rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c | 39 |
1 files changed, 29 insertions, 10 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c index 4692e8c345ed..e826da34e919 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c @@ -11,13 +11,16 @@ */ #include <linux/clk-provider.h> +#include <linux/regmap.h> -#include "sun4i_tcon.h" #include "sun4i_hdmi.h" struct sun4i_ddc { struct clk_hw hw; struct sun4i_hdmi *hdmi; + struct regmap_field *reg; + u8 pre_div; + u8 m_offset; }; static inline struct sun4i_ddc *hw_to_ddc(struct clk_hw *hw) @@ -27,6 +30,8 @@ static inline struct sun4i_ddc *hw_to_ddc(struct clk_hw *hw) static unsigned long sun4i_ddc_calc_divider(unsigned long rate, unsigned long parent_rate, + const u8 pre_div, + const u8 m_offset, u8 *m, u8 *n) { unsigned long best_rate = 0; @@ -36,7 +41,8 @@ static unsigned long sun4i_ddc_calc_divider(unsigned long rate, for (_n = 0; _n < 8; _n++) { unsigned long tmp_rate; - tmp_rate = (((parent_rate / 2) / 10) >> _n) / (_m + 1); + tmp_rate = (((parent_rate / pre_div) / 10) >> _n) / + (_m + m_offset); if (tmp_rate > rate) continue; @@ -60,21 +66,25 @@ static unsigned long sun4i_ddc_calc_divider(unsigned long rate, static long sun4i_ddc_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { - return sun4i_ddc_calc_divider(rate, *prate, NULL, NULL); + struct sun4i_ddc *ddc = hw_to_ddc(hw); + + return sun4i_ddc_calc_divider(rate, *prate, ddc->pre_div, + ddc->m_offset, NULL, NULL); } static unsigned long sun4i_ddc_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { struct sun4i_ddc *ddc = hw_to_ddc(hw); - u32 reg; + unsigned int reg; u8 m, n; - reg = readl(ddc->hdmi->base + SUN4I_HDMI_DDC_CLK_REG); - m = (reg >> 3) & 0x7; + regmap_field_read(ddc->reg, ®); + m = (reg >> 3) & 0xf; n = reg & 0x7; - return (((parent_rate / 2) / 10) >> n) / (m + 1); + return (((parent_rate / ddc->pre_div) / 10) >> n) / + (m + ddc->m_offset); } static int sun4i_ddc_set_rate(struct clk_hw *hw, unsigned long rate, @@ -83,10 +93,12 @@ static int sun4i_ddc_set_rate(struct clk_hw *hw, unsigned long rate, struct sun4i_ddc *ddc = hw_to_ddc(hw); u8 div_m, div_n; - sun4i_ddc_calc_divider(rate, parent_rate, &div_m, &div_n); + sun4i_ddc_calc_divider(rate, parent_rate, ddc->pre_div, + ddc->m_offset, &div_m, &div_n); - writel(SUN4I_HDMI_DDC_CLK_M(div_m) | SUN4I_HDMI_DDC_CLK_N(div_n), - ddc->hdmi->base + SUN4I_HDMI_DDC_CLK_REG); + regmap_field_write(ddc->reg, + SUN4I_HDMI_DDC_CLK_M(div_m) | + SUN4I_HDMI_DDC_CLK_N(div_n)); return 0; } @@ -111,6 +123,11 @@ int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *parent) if (!ddc) return -ENOMEM; + ddc->reg = devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->ddc_clk_reg); + if (IS_ERR(ddc->reg)) + return PTR_ERR(ddc->reg); + init.name = "hdmi-ddc"; init.ops = &sun4i_ddc_ops; init.parent_names = &parent_name; @@ -118,6 +135,8 @@ int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *parent) ddc->hdmi = hdmi; ddc->hw.init = &init; + ddc->pre_div = hdmi->variant->ddc_clk_pre_divider; + ddc->m_offset = hdmi->variant->ddc_clk_m_offset; hdmi->ddc_clk = devm_clk_register(hdmi->dev, &ddc->hw); if (IS_ERR(hdmi->ddc_clk)) |