Merge branch 'ep93xx' into for-2.6.36

[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-ep93xx / clock.c

diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index e782af18ffb70f6c133b16b6b22d60addc9f577e..803162492c4a2c923e6d2b5b2f6216985e18b324 100644 (file)
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -97,6 +97,10 @@ static struct clk clk_keypad = {
        .enable_mask    = EP93XX_SYSCON_KEYTCHCLKDIV_KEN,
        .set_rate       = set_keytchclk_rate,
 };
+static struct clk clk_spi = {
+       .parent         = &clk_xtali,
+       .rate           = EP93XX_EXT_CLK_RATE,
+};
 static struct clk clk_pwm = {
        .parent         = &clk_xtali,
        .rate           = EP93XX_EXT_CLK_RATE,
@@ -210,6 +214,7 @@ static struct clk_lookup clocks[] = {
        INIT_CK("ep93xx-ohci",          NULL,           &clk_usb_host),
        INIT_CK("ep93xx-keypad",        NULL,           &clk_keypad),
        INIT_CK("ep93xx-fb",            NULL,           &clk_video),
+       INIT_CK("ep93xx-spi.0",         NULL,           &clk_spi),
        INIT_CK("ep93xx-i2s",           "mclk",         &clk_i2s_mclk),
        INIT_CK("ep93xx-i2s",           "sclk",         &clk_i2s_sclk),
        INIT_CK("ep93xx-i2s",           "lrclk",        &clk_i2s_lrclk),
@@ -538,6 +543,14 @@ static int __init ep93xx_clock_init(void)
        /* Initialize the pll2 derived clocks */
        clk_usb_host.rate = clk_pll2.rate / (((value >> 28) & 0xf) + 1);
 
+       /*
+        * EP93xx SSP clock rate was doubled in version E2. For more information
+        * see:
+        *     http://www.cirrus.com/en/pubs/appNote/AN273REV4.pdf
+        */
+       if (ep93xx_chip_revision() < EP93XX_CHIP_REV_E2)
+               clk_spi.rate /= 2;
+
        pr_info("PLL1 running at %ld MHz, PLL2 at %ld MHz\n",
                clk_pll1.rate / 1000000, clk_pll2.rate / 1000000);
        pr_info("FCLK %ld MHz, HCLK %ld MHz, PCLK %ld MHz\n",