media: s5p-mfc: Make additional clocks optional
Since the beginning the second clock ('special', 'sclk') was optional and it is not available on some variants of Exynos SoCs (i.e. Exynos5420 with v7 of MFC hardware). However commit1bce6fb3ed
("[media] s5p-mfc: Rework clock handling") made handling of all specified clocks mandatory. This patch restores original behavior of the driver and fixes its operation on Exynos5420 SoCs. Fixes:1bce6fb3ed
("[media] s5p-mfc: Rework clock handling") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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@ -34,6 +34,11 @@ int s5p_mfc_init_pm(struct s5p_mfc_dev *dev)
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for (i = 0; i < pm->num_clocks; i++) {
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pm->clocks[i] = devm_clk_get(pm->device, pm->clk_names[i]);
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if (IS_ERR(pm->clocks[i])) {
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/* additional clocks are optional */
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if (i && PTR_ERR(pm->clocks[i]) == -ENOENT) {
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pm->clocks[i] = NULL;
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continue;
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}
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mfc_err("Failed to get clock: %s\n",
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pm->clk_names[i]);
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return PTR_ERR(pm->clocks[i]);
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