clk: samsung: exynos5433: Keep sclk_uart clocks enabled in suspend

Message ID 20180912131641.21688-1-m.szyprowski@samsung.com
State New
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Series
  • clk: samsung: exynos5433: Keep sclk_uart clocks enabled in suspend
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Commit Message

Marek Szyprowski Sept. 12, 2018, 1:16 p.m.
All sclk_uart clocks in TOP CMU have to be kept enabled for suspend/resume
cycle, otherwise TM2(e) boards hangs before entering the suspend mode.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

---
This change was missing in the initial patch, because 'no_console_suspend'
kernel option did almost the same.
---
 drivers/clk/samsung/clk-exynos5433.c | 2 ++
 1 file changed, 2 insertions(+)

-- 
2.17.1

Comments

Sylwester Nawrocki Sept. 12, 2018, 9:02 p.m. | #1
On 09/12/2018 03:16 PM, Marek Szyprowski wrote:
> All sclk_uart clocks in TOP CMU have to be kept enabled for suspend/resume

> cycle, otherwise TM2(e) boards hangs before entering the suspend mode.

> 

> Signed-off-by: Marek Szyprowski<m.szyprowski@samsung.com>


Patch applied, thanks.
Sylwester Nawrocki Sept. 12, 2018, 9:02 p.m. | #2
On 09/12/2018 03:16 PM, Marek Szyprowski wrote:
> All sclk_uart clocks in TOP CMU have to be kept enabled for suspend/resume

> cycle, otherwise TM2(e) boards hangs before entering the suspend mode.

> 

> Signed-off-by: Marek Szyprowski<m.szyprowski@samsung.com>


Patch applied, thanks.

Patch

diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c
index 13384f4911c7..84eac0ce5682 100644
--- a/drivers/clk/samsung/clk-exynos5433.c
+++ b/drivers/clk/samsung/clk-exynos5433.c
@@ -180,6 +180,8 @@  static const unsigned long top_clk_regs[] __initconst = {
 static const struct samsung_clk_reg_dump top_suspend_regs[] = {
 	/* force all aclk clocks enabled */
 	{ ENABLE_ACLK_TOP, 0x67ecffed },
+	/* force all sclk_uart clocks enabled */
+	{ ENABLE_SCLK_TOP_PERIC, 0x38 },
 	/* ISP PLL has to be enabled for suspend: reset value + ENABLE bit */
 	{ ISP_PLL_CON0, 0x85cc0502 },
 	/* ISP PLL has to be enabled for suspend: reset value + ENABLE bit */