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path: root/drivers/clk/h8300/clk-h8s2678.c
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Diffstat (limited to 'drivers/clk/h8300/clk-h8s2678.c')
-rw-r--r--drivers/clk/h8300/clk-h8s2678.c145
1 files changed, 0 insertions, 145 deletions
diff --git a/drivers/clk/h8300/clk-h8s2678.c b/drivers/clk/h8300/clk-h8s2678.c
deleted file mode 100644
index 67c495b67c18..000000000000
--- a/drivers/clk/h8300/clk-h8s2678.c
+++ /dev/null
@@ -1,145 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * H8S2678 clock driver
- *
- * Copyright 2015 Yoshinori Sato <ysato@users.sourceforge.jp>
- */
-
-#include <linux/clk-provider.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/err.h>
-#include <linux/of_address.h>
-#include <linux/slab.h>
-
-static DEFINE_SPINLOCK(clklock);
-
-#define MAX_FREQ 33333333
-#define MIN_FREQ 8000000
-
-struct pll_clock {
- struct clk_hw hw;
- void __iomem *sckcr;
- void __iomem *pllcr;
-};
-
-#define to_pll_clock(_hw) container_of(_hw, struct pll_clock, hw)
-
-static unsigned long pll_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct pll_clock *pll_clock = to_pll_clock(hw);
- int mul = 1 << (readb(pll_clock->pllcr) & 3);
-
- return parent_rate * mul;
-}
-
-static long pll_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
-{
- int i, m = -1;
- long offset[3];
-
- if (rate > MAX_FREQ)
- rate = MAX_FREQ;
- if (rate < MIN_FREQ)
- rate = MIN_FREQ;
-
- for (i = 0; i < 3; i++)
- offset[i] = abs(rate - (*prate * (1 << i)));
- for (i = 0; i < 3; i++)
- if (m < 0)
- m = i;
- else
- m = (offset[i] < offset[m])?i:m;
-
- return *prate * (1 << m);
-}
-
-static int pll_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- int pll;
- unsigned char val;
- unsigned long flags;
- struct pll_clock *pll_clock = to_pll_clock(hw);
-
- pll = ((rate / parent_rate) / 2) & 0x03;
- spin_lock_irqsave(&clklock, flags);
- val = readb(pll_clock->sckcr);
- val |= 0x08;
- writeb(val, pll_clock->sckcr);
- val = readb(pll_clock->pllcr);
- val &= ~0x03;
- val |= pll;
- writeb(val, pll_clock->pllcr);
- spin_unlock_irqrestore(&clklock, flags);
- return 0;
-}
-
-static const struct clk_ops pll_ops = {
- .recalc_rate = pll_recalc_rate,
- .round_rate = pll_round_rate,
- .set_rate = pll_set_rate,
-};
-
-static void __init h8s2678_pll_clk_setup(struct device_node *node)
-{
- unsigned int num_parents;
- const char *clk_name = node->name;
- const char *parent_name;
- struct pll_clock *pll_clock;
- struct clk_init_data init;
- int ret;
-
- num_parents = of_clk_get_parent_count(node);
- if (!num_parents) {
- pr_err("%s: no parent found\n", clk_name);
- return;
- }
-
-
- pll_clock = kzalloc(sizeof(*pll_clock), GFP_KERNEL);
- if (!pll_clock)
- return;
-
- pll_clock->sckcr = of_iomap(node, 0);
- if (pll_clock->sckcr == NULL) {
- pr_err("%s: failed to map divide register\n", clk_name);
- goto free_clock;
- }
-
- pll_clock->pllcr = of_iomap(node, 1);
- if (pll_clock->pllcr == NULL) {
- pr_err("%s: failed to map multiply register\n", clk_name);
- goto unmap_sckcr;
- }
-
- parent_name = of_clk_get_parent_name(node, 0);
- init.name = clk_name;
- init.ops = &pll_ops;
- init.flags = 0;
- init.parent_names = &parent_name;
- init.num_parents = 1;
- pll_clock->hw.init = &init;
-
- ret = clk_hw_register(NULL, &pll_clock->hw);
- if (ret) {
- pr_err("%s: failed to register %s div clock (%d)\n",
- __func__, clk_name, ret);
- goto unmap_pllcr;
- }
-
- of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll_clock->hw);
- return;
-
-unmap_pllcr:
- iounmap(pll_clock->pllcr);
-unmap_sckcr:
- iounmap(pll_clock->sckcr);
-free_clock:
- kfree(pll_clock);
-}
-
-CLK_OF_DECLARE(h8s2678_div_clk, "renesas,h8s2678-pll-clock",
- h8s2678_pll_clk_setup);