};
static int samsung_dsim_of_read_u32(const struct device_node *np,
- const char *propname, u32 *out_value)
+ const char *propname, u32 *out_value, bool optional)
{
int ret = of_property_read_u32(np, propname, out_value);
- if (ret < 0)
+ if (ret < 0 && !optional)
pr_err("%pOF: failed to get '%s' property\n", np, propname);
return ret;
u32 lane_polarities[5] = { 0 };
struct device_node *endpoint;
int i, nr_lanes, ret;
+ struct clk *pll_clk;
ret = samsung_dsim_of_read_u32(node, "samsung,pll-clock-frequency",
- &dsi->pll_clk_rate);
- if (ret < 0)
- return ret;
+ &dsi->pll_clk_rate, 1);
+ /* If it doesn't exist, read it from the clock instead of failing */
+ if (ret < 0) {
+ dev_dbg(dev, "Using sclk_mipi for pll clock frequency\n");
+ pll_clk = devm_clk_get(dev, "sclk_mipi");
+ if (!IS_ERR(pll_clk))
+ dsi->pll_clk_rate = clk_get_rate(pll_clk);
+ else
+ return PTR_ERR(pll_clk);
+ }
ret = samsung_dsim_of_read_u32(node, "samsung,burst-clock-frequency",
- &dsi->burst_clk_rate);
+ &dsi->burst_clk_rate, 0);
if (ret < 0)
return ret;
ret = samsung_dsim_of_read_u32(node, "samsung,esc-clock-frequency",
- &dsi->esc_clk_rate);
+ &dsi->esc_clk_rate, 0);
if (ret < 0)
return ret;