clk/qcom: apq8016: allow apq8016_clk_init_uart() to be called externally

When U-Boot as running as the first stage bootloader on MSM8916 devices,
early debug UART requires turning on the clocks (for some reason the
pre-loader turns them off?!).

To simplify developing for this platform, allow the
apq8016_clk_init_uart() function to be called externally. Developers can
call this from the serial_msm debug uart driver to configure the clocks
before the driver model is available.

As it is only possible to enable early debug UART in custom builds of
U-Boot, this solution at least gives developers the option.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c
index 9de0ad5ed32d6d15956c07c71b2d368e8be7af2f..e6647f7c41dde84869540ec3f378e8e8f7c9666d 100644 (file)
--- a/drivers/clk/qcom/clock-apq8016.c
+++ b/drivers/clk/qcom/clock-apq8016.c
@@ -103,20 +103,20 @@ static const struct bcr_regs uart2_regs = {
 };
 
 /* UART: 115200 */
-static int clk_init_uart(struct msm_clk_priv *priv)
+int apq8016_clk_init_uart(phys_addr_t base)
 {
        /* Enable AHB clock */
-       clk_enable_vote_clk(priv->base, &gcc_blsp1_ahb_clk);
+       clk_enable_vote_clk(base, &gcc_blsp1_ahb_clk);
 
        /* 7372800 uart block clock @ GPLL0 */
-       clk_rcg_set_rate_mnd(priv->base, &uart2_regs, 1, 144, 15625,
+       clk_rcg_set_rate_mnd(base, &uart2_regs, 1, 144, 15625,
                             CFG_CLK_SRC_GPLL0, 16);
 
        /* Vote for gpll0 clock */
-       clk_enable_gpll0(priv->base, &gpll0_vote_clk);
+       clk_enable_gpll0(base, &gpll0_vote_clk);
 
        /* Enable core clk */
-       clk_enable_cbc(priv->base + BLSP1_UART2_APPS_CBCR);
+       clk_enable_cbc(base + BLSP1_UART2_APPS_CBCR);
 
        return 0;
 }
@@ -133,7 +133,7 @@ static ulong apq8016_clk_set_rate(struct clk *clk, ulong rate)
                return clk_init_sdc(priv, 1, rate);
                break;
        case GCC_BLSP1_UART2_APPS_CLK: /* UART2 */
-               return clk_init_uart(priv);
+               return apq8016_clk_init_uart(priv->base);
                break;
        default:
                return 0;