clk: samsung: exynos5250: Add CLK_IGNORE_UNUSED flag for the sysreg clock

commit 2feed5aecf5f367b92bd6b6e92afe9e3de466907 upstream.

The sysreg (system register) generates control signals for various blocks
like disp1blk, i2c, mipi, usb etc. However, it gets disabled as an unused
clock at boot-up. This can lead to failures in operation of above blocks,
because they can not be configured properly if this clock is disabled.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
[t.figa: Updated patch description.]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index 27ffe2fb68cf488cc4b34c080eb9a64ce29ad23b..8f5454cfb54072ab7538ee5a6ae287388c01df28 100644 (file)
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -407,7 +407,8 @@ static struct samsung_gate_clock exynos5250_gate_clks[] __initdata = {
        GATE(hsi2c2, "hsi2c2", "aclk66", GATE_IP_PERIC, 30, 0, 0),
        GATE(hsi2c3, "hsi2c3", "aclk66", GATE_IP_PERIC, 31, 0, 0),
        GATE(chipid, "chipid", "aclk66", GATE_IP_PERIS, 0, 0, 0),
-       GATE(sysreg, "sysreg", "aclk66", GATE_IP_PERIS, 1, 0, 0),
+       GATE(sysreg, "sysreg", "aclk66",
+                       GATE_IP_PERIS, 1, CLK_IGNORE_UNUSED, 0),
        GATE(pmu, "pmu", "aclk66", GATE_IP_PERIS, 2, CLK_IGNORE_UNUSED, 0),
        GATE(tzpc0, "tzpc0", "aclk66", GATE_IP_PERIS, 6, 0, 0),
        GATE(tzpc1, "tzpc1", "aclk66", GATE_IP_PERIS, 7, 0, 0),