diff options
author | David Virag <virag.david003@gmail.com> | 2021-12-06 18:31:18 +0300 |
---|---|---|
committer | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2021-12-20 01:39:01 +0300 |
commit | cfe238e4e7ff1701b010a5ff7c64ae11d53ed8cb (patch) | |
tree | 8c777e697fed30237c081d464025bd5fa3769da2 /drivers/clk/samsung/clk-exynos850.c | |
parent | 77624aa1d81f4036d83d9868053199eacf2ae2ed (diff) | |
download | linux-cfe238e4e7ff1701b010a5ff7c64ae11d53ed8cb.tar.xz |
clk: samsung: Make exynos850_register_cmu shared
Rename exynos850_register_cmu to exynos_arm64_register_cmu and move it
to a new file called "clk-exynos-arm64.c".
This should have no functional changes, but it will allow this code to
be shared between other arm64 Exynos SoCs, like the Exynos7885 and
possibly ExynosAuto V9.
Signed-off-by: David Virag <virag.david003@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211206153124.427102-5-virag.david003@gmail.com
Diffstat (limited to 'drivers/clk/samsung/clk-exynos850.c')
-rw-r--r-- | drivers/clk/samsung/clk-exynos850.c | 88 |
1 files changed, 4 insertions, 84 deletions
diff --git a/drivers/clk/samsung/clk-exynos850.c b/drivers/clk/samsung/clk-exynos850.c index 4799771d09bc..cd9725f1dbf7 100644 --- a/drivers/clk/samsung/clk-exynos850.c +++ b/drivers/clk/samsung/clk-exynos850.c @@ -9,93 +9,13 @@ #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/of.h> -#include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <dt-bindings/clock/exynos850.h> #include "clk.h" - -/* Gate register bits */ -#define GATE_MANUAL BIT(20) -#define GATE_ENABLE_HWACG BIT(28) - -/* Gate register offsets range */ -#define GATE_OFF_START 0x2000 -#define GATE_OFF_END 0x2fff - -/** - * exynos850_init_clocks - Set clocks initial configuration - * @np: CMU device tree node with "reg" property (CMU addr) - * @reg_offs: Register offsets array for clocks to init - * @reg_offs_len: Number of register offsets in reg_offs array - * - * Set manual control mode for all gate clocks. - */ -static void __init exynos850_init_clocks(struct device_node *np, - const unsigned long *reg_offs, size_t reg_offs_len) -{ - void __iomem *reg_base; - size_t i; - - reg_base = of_iomap(np, 0); - if (!reg_base) - panic("%s: failed to map registers\n", __func__); - - for (i = 0; i < reg_offs_len; ++i) { - void __iomem *reg = reg_base + reg_offs[i]; - u32 val; - - /* Modify only gate clock registers */ - if (reg_offs[i] < GATE_OFF_START || reg_offs[i] > GATE_OFF_END) - continue; - - val = readl(reg); - val |= GATE_MANUAL; - val &= ~GATE_ENABLE_HWACG; - writel(val, reg); - } - - iounmap(reg_base); -} - -/** - * exynos850_register_cmu - Register specified Exynos850 CMU domain - * @dev: Device object; may be NULL if this function is not being - * called from platform driver probe function - * @np: CMU device tree node - * @cmu: CMU data - * - * Register specified CMU domain, which includes next steps: - * - * 1. Enable parent clock of @cmu CMU - * 2. Set initial registers configuration for @cmu CMU clocks - * 3. Register @cmu CMU clocks using Samsung clock framework API - */ -static void __init exynos850_register_cmu(struct device *dev, - struct device_node *np, const struct samsung_cmu_info *cmu) -{ - /* Keep CMU parent clock running (needed for CMU registers access) */ - if (cmu->clk_name) { - struct clk *parent_clk; - - if (dev) - parent_clk = clk_get(dev, cmu->clk_name); - else - parent_clk = of_clk_get_by_name(np, cmu->clk_name); - - if (IS_ERR(parent_clk)) { - pr_err("%s: could not find bus clock %s; err = %ld\n", - __func__, cmu->clk_name, PTR_ERR(parent_clk)); - } else { - clk_prepare_enable(parent_clk); - } - } - - exynos850_init_clocks(np, cmu->clk_regs, cmu->nr_clk_regs); - samsung_cmu_register_one(np, cmu); -} +#include "clk-exynos-arm64.h" /* ---- CMU_TOP ------------------------------------------------------------- */ @@ -404,7 +324,7 @@ static const struct samsung_cmu_info top_cmu_info __initconst = { static void __init exynos850_cmu_top_init(struct device_node *np) { - exynos850_register_cmu(NULL, np, &top_cmu_info); + exynos_arm64_register_cmu(NULL, np, &top_cmu_info); } /* Register CMU_TOP early, as it's a dependency for other early domains */ @@ -911,7 +831,7 @@ static const struct samsung_cmu_info peri_cmu_info __initconst = { static void __init exynos850_cmu_peri_init(struct device_node *np) { - exynos850_register_cmu(NULL, np, &peri_cmu_info); + exynos_arm64_register_cmu(NULL, np, &peri_cmu_info); } /* Register CMU_PERI early, as it's needed for MCT timer */ @@ -1098,7 +1018,7 @@ static int __init exynos850_cmu_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; info = of_device_get_match_data(dev); - exynos850_register_cmu(dev, dev->of_node, info); + exynos_arm64_register_cmu(dev, dev->of_node, info); return 0; } |