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clk: tegra: Add missing spinlock for hclk and pclk

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The hclk and pclk clocks are controlled by the same register. Hence a lock is
required to avoid corruption.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Reviewed-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Peter De Schrijver 2013-02-07 18:37:35 +02:00 committed by Stephen Warren
parent c64c65d494
commit d076a206b2
2 changed files with 14 additions and 8 deletions
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11
drivers/clk/tegra/clk-tegra20.c
View File

@ -194,6 +194,7 @@ static void __iomem *clk_base;
static void __iomem *pmc_base;
static DEFINE_SPINLOCK(pll_div_lock);
static DEFINE_SPINLOCK(sysrate_lock);
#define TEGRA_INIT_DATA_MUX(_name, _con_id, _dev_id, _parents, _offset, \
_clk_num, _regs, _gate_flags, _clk_id) \
@ -768,19 +769,21 @@ static void tegra20_super_clk_init(void)
/* HCLK */
clk = clk_register_divider(NULL, "hclk_div", "sclk", 0,
clk_base + CLK_SYSTEM_RATE, 4, 2, 0, NULL);
clk_base + CLK_SYSTEM_RATE, 4, 2, 0,
&sysrate_lock);
clk = clk_register_gate(NULL, "hclk", "hclk_div", CLK_SET_RATE_PARENT,
clk_base + CLK_SYSTEM_RATE, 7,
CLK_GATE_SET_TO_DISABLE, NULL);
CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
clk_register_clkdev(clk, "hclk", NULL);
clks[hclk] = clk;
/* PCLK */
clk = clk_register_divider(NULL, "pclk_div", "hclk", 0,
clk_base + CLK_SYSTEM_RATE, 0, 2, 0, NULL);
clk_base + CLK_SYSTEM_RATE, 0, 2, 0,
&sysrate_lock);
clk = clk_register_gate(NULL, "pclk", "pclk_div", CLK_SET_RATE_PARENT,
clk_base + CLK_SYSTEM_RATE, 3,
CLK_GATE_SET_TO_DISABLE, NULL);
CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
clk_register_clkdev(clk, "pclk", NULL);
clks[pclk] = clk;

11
drivers/clk/tegra/clk-tegra30.c
View File

@ -275,6 +275,7 @@ static DEFINE_SPINLOCK(clk_out_lock);
static DEFINE_SPINLOCK(pll_div_lock);
static DEFINE_SPINLOCK(cml_lock);
static DEFINE_SPINLOCK(pll_d_lock);
static DEFINE_SPINLOCK(sysrate_lock);
#define TEGRA_INIT_DATA_MUX(_name, _con_id, _dev_id, _parents, _offset, \
_clk_num, _regs, _gate_flags, _clk_id) \
@ -1348,19 +1349,21 @@ static void __init tegra30_super_clk_init(void)
/* HCLK */
clk = clk_register_divider(NULL, "hclk_div", "sclk", 0,
clk_base + SYSTEM_CLK_RATE, 4, 2, 0, NULL);
clk_base + SYSTEM_CLK_RATE, 4, 2, 0,
&sysrate_lock);
clk = clk_register_gate(NULL, "hclk", "hclk_div", CLK_SET_RATE_PARENT,
clk_base + SYSTEM_CLK_RATE, 7,
CLK_GATE_SET_TO_DISABLE, NULL);
CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
clk_register_clkdev(clk, "hclk", NULL);
clks[hclk] = clk;
/* PCLK */
clk = clk_register_divider(NULL, "pclk_div", "hclk", 0,
clk_base + SYSTEM_CLK_RATE, 0, 2, 0, NULL);
clk_base + SYSTEM_CLK_RATE, 0, 2, 0,
&sysrate_lock);
clk = clk_register_gate(NULL, "pclk", "pclk_div", CLK_SET_RATE_PARENT,
clk_base + SYSTEM_CLK_RATE, 3,
CLK_GATE_SET_TO_DISABLE, NULL);
CLK_GATE_SET_TO_DISABLE, &sysrate_lock);
clk_register_clkdev(clk, "pclk", NULL);
clks[pclk] = clk;