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linux/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c
Stephen Boyd 62e59c4e69 clk: Remove io.h from clk-provider.h 
Now that we've gotten rid of clk_readl() we can remove io.h from the
clk-provider header and push out the io.h include to any code that isn't
already including the io.h header but using things like readl/writel,
etc.

Found with this grep:

  git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \
  	xargs git grep -l \
	-e '\<__iowrite32_copy\>' --or \
	-e '\<__ioread32_copy\>' --or \
	-e '\<__iowrite64_copy\>' --or \
	-e '\<ioremap_page_range\>' --or \
	-e '\<ioremap_huge_init\>' --or \
	-e '\<arch_ioremap_pud_supported\>' --or \
	-e '\<arch_ioremap_pmd_supported\>' --or \
	-e '\<devm_ioport_map\>' --or \
	-e '\<devm_ioport_unmap\>' --or \
	-e '\<IOMEM_ERR_PTR\>' --or \
	-e '\<devm_ioremap\>' --or \
	-e '\<devm_ioremap_nocache\>' --or \
	-e '\<devm_ioremap_wc\>' --or \
	-e '\<devm_iounmap\>' --or \
	-e '\<devm_ioremap_release\>' --or \
	-e '\<devm_memremap\>' --or \
	-e '\<devm_memunmap\>' --or \
	-e '\<__devm_memremap_pages\>' --or \
	-e '\<pci_remap_cfgspace\>' --or \
	-e '\<arch_has_dev_port\>' --or \
	-e '\<arch_phys_wc_add\>' --or \
	-e '\<arch_phys_wc_del\>' --or \
	-e '\<memremap\>' --or \
	-e '\<memunmap\>' --or \
	-e '\<arch_io_reserve_memtype_wc\>' --or \
	-e '\<arch_io_free_memtype_wc\>' --or \
	-e '\<__io_aw\>' --or \
	-e '\<__io_pbw\>' --or \
	-e '\<__io_paw\>' --or \
	-e '\<__io_pbr\>' --or \
	-e '\<__io_par\>' --or \
	-e '\<__raw_readb\>' --or \
	-e '\<__raw_readw\>' --or \
	-e '\<__raw_readl\>' --or \
	-e '\<__raw_readq\>' --or \
	-e '\<__raw_writeb\>' --or \
	-e '\<__raw_writew\>' --or \
	-e '\<__raw_writel\>' --or \
	-e '\<__raw_writeq\>' --or \
	-e '\<readb\>' --or \
	-e '\<readw\>' --or \
	-e '\<readl\>' --or \
	-e '\<readq\>' --or \
	-e '\<writeb\>' --or \
	-e '\<writew\>' --or \
	-e '\<writel\>' --or \
	-e '\<writeq\>' --or \
	-e '\<readb_relaxed\>' --or \
	-e '\<readw_relaxed\>' --or \
	-e '\<readl_relaxed\>' --or \
	-e '\<readq_relaxed\>' --or \
	-e '\<writeb_relaxed\>' --or \
	-e '\<writew_relaxed\>' --or \
	-e '\<writel_relaxed\>' --or \
	-e '\<writeq_relaxed\>' --or \
	-e '\<readsb\>' --or \
	-e '\<readsw\>' --or \
	-e '\<readsl\>' --or \
	-e '\<readsq\>' --or \
	-e '\<writesb\>' --or \
	-e '\<writesw\>' --or \
	-e '\<writesl\>' --or \
	-e '\<writesq\>' --or \
	-e '\<inb\>' --or \
	-e '\<inw\>' --or \
	-e '\<inl\>' --or \
	-e '\<outb\>' --or \
	-e '\<outw\>' --or \
	-e '\<outl\>' --or \
	-e '\<inb_p\>' --or \
	-e '\<inw_p\>' --or \
	-e '\<inl_p\>' --or \
	-e '\<outb_p\>' --or \
	-e '\<outw_p\>' --or \
	-e '\<outl_p\>' --or \
	-e '\<insb\>' --or \
	-e '\<insw\>' --or \
	-e '\<insl\>' --or \
	-e '\<outsb\>' --or \
	-e '\<outsw\>' --or \
	-e '\<outsl\>' --or \
	-e '\<insb_p\>' --or \
	-e '\<insw_p\>' --or \
	-e '\<insl_p\>' --or \
	-e '\<outsb_p\>' --or \
	-e '\<outsw_p\>' --or \
	-e '\<outsl_p\>' --or \
	-e '\<ioread8\>' --or \
	-e '\<ioread16\>' --or \
	-e '\<ioread32\>' --or \
	-e '\<ioread64\>' --or \
	-e '\<iowrite8\>' --or \
	-e '\<iowrite16\>' --or \
	-e '\<iowrite32\>' --or \
	-e '\<iowrite64\>' --or \
	-e '\<ioread16be\>' --or \
	-e '\<ioread32be\>' --or \
	-e '\<ioread64be\>' --or \
	-e '\<iowrite16be\>' --or \
	-e '\<iowrite32be\>' --or \
	-e '\<iowrite64be\>' --or \
	-e '\<ioread8_rep\>' --or \
	-e '\<ioread16_rep\>' --or \
	-e '\<ioread32_rep\>' --or \
	-e '\<ioread64_rep\>' --or \
	-e '\<iowrite8_rep\>' --or \
	-e '\<iowrite16_rep\>' --or \
	-e '\<iowrite32_rep\>' --or \
	-e '\<iowrite64_rep\>' --or \
	-e '\<__io_virt\>' --or \
	-e '\<pci_iounmap\>' --or \
	-e '\<virt_to_phys\>' --or \
	-e '\<phys_to_virt\>' --or \
	-e '\<ioremap_uc\>' --or \
	-e '\<ioremap\>' --or \
	-e '\<__ioremap\>' --or \
	-e '\<iounmap\>' --or \
	-e '\<ioremap\>' --or \
	-e '\<ioremap_nocache\>' --or \
	-e '\<ioremap_uc\>' --or \
	-e '\<ioremap_wc\>' --or \
	-e '\<ioremap_wc\>' --or \
	-e '\<ioremap_wt\>' --or \
	-e '\<ioport_map\>' --or \
	-e '\<ioport_unmap\>' --or \
	-e '\<ioport_map\>' --or \
	-e '\<ioport_unmap\>' --or \
	-e '\<xlate_dev_kmem_ptr\>' --or \
	-e '\<xlate_dev_mem_ptr\>' --or \
	-e '\<unxlate_dev_mem_ptr\>' --or \
	-e '\<virt_to_bus\>' --or \
	-e '\<bus_to_virt\>' --or \
	-e '\<memset_io\>' --or \
	-e '\<memcpy_fromio\>' --or \
	-e '\<memcpy_toio\>'

I also reordered a couple includes when they weren't alphabetical and
removed clk.h from kona, replacing it with clk-provider.h because
that driver doesn't use clk consumer APIs.

Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: John Crispin <john@phrozen.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-05-15 13:21:37 -07:00

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/*
* Copyright (C) 2016 Free Electrons
* Copyright (C) 2016 NextThing Co
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
#include <linux/clk-provider.h>
#include <linux/io.h>
#include "sun4i_hdmi.h"
struct sun4i_tmds {
struct clk_hw hw;
struct sun4i_hdmi *hdmi;
u8 div_offset;
};
static inline struct sun4i_tmds *hw_to_tmds(struct clk_hw *hw)
{
return container_of(hw, struct sun4i_tmds, hw);
}
static unsigned long sun4i_tmds_calc_divider(unsigned long rate,
unsigned long parent_rate,
u8 div_offset,
u8 *div,
bool *half)
{
unsigned long best_rate = 0;
u8 best_m = 0, m;
bool is_double = false;
for (m = div_offset ?: 1; m < (16 + div_offset); m++) {
u8 d;
for (d = 1; d < 3; d++) {
unsigned long tmp_rate;
tmp_rate = parent_rate / m / d;
if (tmp_rate > rate)
continue;
if (!best_rate ||
(rate - tmp_rate) < (rate - best_rate)) {
best_rate = tmp_rate;
best_m = m;
is_double = (d == 2) ? true : false;
}
}
}
if (div && half) {
*div = best_m;
*half = is_double;
}
return best_rate;
}
static int sun4i_tmds_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
struct sun4i_tmds *tmds = hw_to_tmds(hw);
struct clk_hw *parent = NULL;
unsigned long best_parent = 0;
unsigned long rate = req->rate;
int best_div = 1, best_half = 1;
int i, j, p;
/*
* We only consider PLL3, since the TCON is very likely to be
* clocked from it, and to have the same rate than our HDMI
* clock, so we should not need to do anything.
*/
for (p = 0; p < clk_hw_get_num_parents(hw); p++) {
parent = clk_hw_get_parent_by_index(hw, p);
if (!parent)
continue;
for (i = 1; i < 3; i++) {
for (j = tmds->div_offset ?: 1;
j < (16 + tmds->div_offset); j++) {
unsigned long ideal = rate * i * j;
unsigned long rounded;
rounded = clk_hw_round_rate(parent, ideal);
if (rounded == ideal) {
best_parent = rounded;
best_half = i;
best_div = j;
goto out;
}
if (!best_parent ||
abs(rate - rounded / i / j) <
abs(rate - best_parent / best_half /
best_div)) {
best_parent = rounded;
best_half = i;
best_div = j;
}
}
}
}
if (!parent)
return -EINVAL;
out:
req->rate = best_parent / best_half / best_div;
req->best_parent_rate = best_parent;
req->best_parent_hw = parent;
return 0;
}
static unsigned long sun4i_tmds_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct sun4i_tmds *tmds = hw_to_tmds(hw);
u32 reg;
reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
if (reg & SUN4I_HDMI_PAD_CTRL1_HALVE_CLK)
parent_rate /= 2;
reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
reg = ((reg >> 4) & 0xf) + tmds->div_offset;
if (!reg)
reg = 1;
return parent_rate / reg;
}
static int sun4i_tmds_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct sun4i_tmds *tmds = hw_to_tmds(hw);
bool half;
u32 reg;
u8 div;
sun4i_tmds_calc_divider(rate, parent_rate, tmds->div_offset,
&div, &half);
reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
reg &= ~SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
if (half)
reg |= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
writel(reg, tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
reg &= ~SUN4I_HDMI_PLL_CTRL_DIV_MASK;
writel(reg | SUN4I_HDMI_PLL_CTRL_DIV(div - tmds->div_offset),
tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
return 0;
}
static u8 sun4i_tmds_get_parent(struct clk_hw *hw)
{
struct sun4i_tmds *tmds = hw_to_tmds(hw);
u32 reg;
reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);
return ((reg & SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK) >>
SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_SHIFT);
}
static int sun4i_tmds_set_parent(struct clk_hw *hw, u8 index)
{
struct sun4i_tmds *tmds = hw_to_tmds(hw);
u32 reg;
if (index > 1)
return -EINVAL;
reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);
reg &= ~SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK;
writel(reg | SUN4I_HDMI_PLL_DBG0_TMDS_PARENT(index),
tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);
return 0;
}
static const struct clk_ops sun4i_tmds_ops = {
.determine_rate = sun4i_tmds_determine_rate,
.recalc_rate = sun4i_tmds_recalc_rate,
.set_rate = sun4i_tmds_set_rate,
.get_parent = sun4i_tmds_get_parent,
.set_parent = sun4i_tmds_set_parent,
};
int sun4i_tmds_create(struct sun4i_hdmi *hdmi)
{
struct clk_init_data init;
struct sun4i_tmds *tmds;
const char *parents[2];
parents[0] = __clk_get_name(hdmi->pll0_clk);
if (!parents[0])
return -ENODEV;
parents[1] = __clk_get_name(hdmi->pll1_clk);
if (!parents[1])
return -ENODEV;
tmds = devm_kzalloc(hdmi->dev, sizeof(*tmds), GFP_KERNEL);
if (!tmds)
return -ENOMEM;
init.name = "hdmi-tmds";
init.ops = &sun4i_tmds_ops;
init.parent_names = parents;
init.num_parents = 2;
init.flags = CLK_SET_RATE_PARENT;
tmds->hdmi = hdmi;
tmds->hw.init = &init;
tmds->div_offset = hdmi->variant->tmds_clk_div_offset;
hdmi->tmds_clk = devm_clk_register(hdmi->dev, &tmds->hw);
if (IS_ERR(hdmi->tmds_clk))
return PTR_ERR(hdmi->tmds_clk);
return 0;
}
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