mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
62e59c4e69
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>
157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2015 Maxime Ripard <maxime.ripard@free-electrons.com>
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/err.h>
|
|
#include <linux/export.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/slab.h>
|
|
|
|
static inline u32 clk_mult_readl(struct clk_multiplier *mult)
|
|
{
|
|
if (mult->flags & CLK_MULTIPLIER_BIG_ENDIAN)
|
|
return ioread32be(mult->reg);
|
|
|
|
return readl(mult->reg);
|
|
}
|
|
|
|
static inline void clk_mult_writel(struct clk_multiplier *mult, u32 val)
|
|
{
|
|
if (mult->flags & CLK_MULTIPLIER_BIG_ENDIAN)
|
|
iowrite32be(val, mult->reg);
|
|
else
|
|
writel(val, mult->reg);
|
|
}
|
|
|
|
static unsigned long __get_mult(struct clk_multiplier *mult,
|
|
unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
if (mult->flags & CLK_MULTIPLIER_ROUND_CLOSEST)
|
|
return DIV_ROUND_CLOSEST(rate, parent_rate);
|
|
|
|
return rate / parent_rate;
|
|
}
|
|
|
|
static unsigned long clk_multiplier_recalc_rate(struct clk_hw *hw,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_multiplier *mult = to_clk_multiplier(hw);
|
|
unsigned long val;
|
|
|
|
val = clk_mult_readl(mult) >> mult->shift;
|
|
val &= GENMASK(mult->width - 1, 0);
|
|
|
|
if (!val && mult->flags & CLK_MULTIPLIER_ZERO_BYPASS)
|
|
val = 1;
|
|
|
|
return parent_rate * val;
|
|
}
|
|
|
|
static bool __is_best_rate(unsigned long rate, unsigned long new,
|
|
unsigned long best, unsigned long flags)
|
|
{
|
|
if (flags & CLK_MULTIPLIER_ROUND_CLOSEST)
|
|
return abs(rate - new) < abs(rate - best);
|
|
|
|
return new >= rate && new < best;
|
|
}
|
|
|
|
static unsigned long __bestmult(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long *best_parent_rate,
|
|
u8 width, unsigned long flags)
|
|
{
|
|
struct clk_multiplier *mult = to_clk_multiplier(hw);
|
|
unsigned long orig_parent_rate = *best_parent_rate;
|
|
unsigned long parent_rate, current_rate, best_rate = ~0;
|
|
unsigned int i, bestmult = 0;
|
|
unsigned int maxmult = (1 << width) - 1;
|
|
|
|
if (!(clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT)) {
|
|
bestmult = rate / orig_parent_rate;
|
|
|
|
/* Make sure we don't end up with a 0 multiplier */
|
|
if ((bestmult == 0) &&
|
|
!(mult->flags & CLK_MULTIPLIER_ZERO_BYPASS))
|
|
bestmult = 1;
|
|
|
|
/* Make sure we don't overflow the multiplier */
|
|
if (bestmult > maxmult)
|
|
bestmult = maxmult;
|
|
|
|
return bestmult;
|
|
}
|
|
|
|
for (i = 1; i < maxmult; i++) {
|
|
if (rate == orig_parent_rate * i) {
|
|
/*
|
|
* This is the best case for us if we have a
|
|
* perfect match without changing the parent
|
|
* rate.
|
|
*/
|
|
*best_parent_rate = orig_parent_rate;
|
|
return i;
|
|
}
|
|
|
|
parent_rate = clk_hw_round_rate(clk_hw_get_parent(hw),
|
|
rate / i);
|
|
current_rate = parent_rate * i;
|
|
|
|
if (__is_best_rate(rate, current_rate, best_rate, flags)) {
|
|
bestmult = i;
|
|
best_rate = current_rate;
|
|
*best_parent_rate = parent_rate;
|
|
}
|
|
}
|
|
|
|
return bestmult;
|
|
}
|
|
|
|
static long clk_multiplier_round_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long *parent_rate)
|
|
{
|
|
struct clk_multiplier *mult = to_clk_multiplier(hw);
|
|
unsigned long factor = __bestmult(hw, rate, parent_rate,
|
|
mult->width, mult->flags);
|
|
|
|
return *parent_rate * factor;
|
|
}
|
|
|
|
static int clk_multiplier_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_multiplier *mult = to_clk_multiplier(hw);
|
|
unsigned long factor = __get_mult(mult, rate, parent_rate);
|
|
unsigned long flags = 0;
|
|
unsigned long val;
|
|
|
|
if (mult->lock)
|
|
spin_lock_irqsave(mult->lock, flags);
|
|
else
|
|
__acquire(mult->lock);
|
|
|
|
val = clk_mult_readl(mult);
|
|
val &= ~GENMASK(mult->width + mult->shift - 1, mult->shift);
|
|
val |= factor << mult->shift;
|
|
clk_mult_writel(mult, val);
|
|
|
|
if (mult->lock)
|
|
spin_unlock_irqrestore(mult->lock, flags);
|
|
else
|
|
__release(mult->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct clk_ops clk_multiplier_ops = {
|
|
.recalc_rate = clk_multiplier_recalc_rate,
|
|
.round_rate = clk_multiplier_round_rate,
|
|
.set_rate = clk_multiplier_set_rate,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_multiplier_ops);
|