diff options
| author | Manikandan Muralidharan <manikandan.m@microchip.com> | 2026-02-23 15:49:17 +0530 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2026-03-25 12:44:57 +0000 |
| commit | 239cd6a417b989708da4b39a71f925897ec87287 (patch) | |
| tree | f5f25dbbc3f5f6cadf8b437ce819b42c7f482d62 /drivers/mfd | |
| parent | c2b06b133c667f46cc7fe81c7df2b6650c74f9c0 (diff) | |
mfd: atmel-hlcdc: Fetch LVDS PLL clock for LVDS display
The XLCDC IP supports parallel RGB, MIPI DSI and LVDS Display.
The LCD Generic clock (sys_clk) is used for Parallel RGB and MIPI
displays, while the LVDS PLL clock (lvds_pll_clk) is used for LVDS
displays.Since both the clocks cannot co-exist together in the DT
for a given display, this patch tries sys_clk first (RGB/MIPI),
fallback to lvds_pll_clk (LVDS).
Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
Link: https://patch.msgid.link/20260223101920.284697-2-manikandan.m@microchip.com
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/atmel-hlcdc.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/mfd/atmel-hlcdc.c b/drivers/mfd/atmel-hlcdc.c index c3f3d39bf584..0b541c0d3b1b 100644 --- a/drivers/mfd/atmel-hlcdc.c +++ b/drivers/mfd/atmel-hlcdc.c @@ -108,10 +108,19 @@ static int atmel_hlcdc_probe(struct platform_device *pdev) return PTR_ERR(hlcdc->periph_clk); } + /* + * Retrieve one of the primary clocks required for LCD operation: + * prefer sys_clk (for RGB/MIPI), and fall back to lvds_pll_clk + * (for LVDS) if needed. + */ hlcdc->sys_clk = devm_clk_get(dev, "sys_clk"); if (IS_ERR(hlcdc->sys_clk)) { - dev_err(dev, "failed to get system clock\n"); - return PTR_ERR(hlcdc->sys_clk); + hlcdc->sys_clk = NULL; + hlcdc->lvds_pll_clk = devm_clk_get(dev, "lvds_pll_clk"); + if (IS_ERR(hlcdc->lvds_pll_clk)) { + dev_err(dev, "Failed to obtain both the LCDC (generic) and LVDS PLL clocks\n"); + return PTR_ERR(hlcdc->lvds_pll_clk); + } } hlcdc->slow_clk = devm_clk_get(dev, "slow_clk"); |