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authorScott Wood <scottwood@freescale.com>2015-09-19 23:29:55 -0500
committerScott Wood <scottwood@freescale.com>2015-10-21 18:05:55 -0500
commit9e19ca2f627e5a6ee7425c48cc30b7356995b691 (patch)
treef76333b0f8c622f5f96e141eced1dedeaee10a89 /drivers/clk/clk-qoriq.c
parent0dfc86b3173feee96f36e71879aa6dd56a4d7925 (diff)
downloadtalos-op-linux-9e19ca2f627e5a6ee7425c48cc30b7356995b691.tar.gz
talos-op-linux-9e19ca2f627e5a6ee7425c48cc30b7356995b691.zip
clk: qoriq: Add ls2080a support.
LS2080A is the first implementation of the chassis 3 clockgen, which has a different register layout than previous chips. It is also little endian, unlike previous chips. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clk-qoriq.c')
-rw-r--r--drivers/clk/clk-qoriq.c77
1 files changed, 68 insertions, 9 deletions
diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
index 06281a362527..8f9c93b9ce21 100644
--- a/drivers/clk/clk-qoriq.c
+++ b/drivers/clk/clk-qoriq.c
@@ -68,7 +68,10 @@ struct clockgen;
* If not set, cmux freq must be >= platform pll/2
*/
#define CG_CMUX_GE_PLAT 1
+
#define CG_PLL_8BIT 2 /* PLLCnGSR[CFG] is 8 bits, not 6 */
+#define CG_VER3 4 /* version 3 cg: reg layout different */
+#define CG_LITTLE_ENDIAN 8
struct clockgen_chipinfo {
const char *compat, *guts_compat;
@@ -94,6 +97,26 @@ struct clockgen {
static struct clockgen clockgen;
+static void cg_out(struct clockgen *cg, u32 val, u32 __iomem *reg)
+{
+ if (cg->info.flags & CG_LITTLE_ENDIAN)
+ iowrite32(val, reg);
+ else
+ iowrite32be(val, reg);
+}
+
+static u32 cg_in(struct clockgen *cg, u32 __iomem *reg)
+{
+ u32 val;
+
+ if (cg->info.flags & CG_LITTLE_ENDIAN)
+ val = ioread32(reg);
+ else
+ val = ioread32be(reg);
+
+ return val;
+}
+
static const struct clockgen_muxinfo p2041_cmux_grp1 = {
{
[0] = { CLKSEL_VALID, CGA_PLL1, PLL_DIV1 },
@@ -429,6 +452,17 @@ static const struct clockgen_chipinfo chipinfo[] = {
.pll_mask = 0x03,
},
{
+ .compat = "fsl,ls2080a-clockgen",
+ .cmux_groups = {
+ &clockgen2_cmux_cga12, &clockgen2_cmux_cgb
+ },
+ .cmux_to_group = {
+ 0, 0, 1, 1, -1
+ },
+ .pll_mask = 0x37,
+ .flags = CG_VER3 | CG_LITTLE_ENDIAN,
+ },
+ {
.compat = "fsl,p2041-clockgen",
.guts_compat = "fsl,qoriq-device-config-1.0",
.init_periph = p2041_init_periph,
@@ -575,7 +609,7 @@ static int mux_set_parent(struct clk_hw *hw, u8 idx)
return -EINVAL;
clksel = hwc->parent_to_clksel[idx];
- iowrite32be((clksel << CLKSEL_SHIFT) & CLKSEL_MASK, hwc->reg);
+ cg_out(hwc->cg, (clksel << CLKSEL_SHIFT) & CLKSEL_MASK, hwc->reg);
return 0;
}
@@ -586,7 +620,7 @@ static u8 mux_get_parent(struct clk_hw *hw)
u32 clksel;
s8 ret;
- clksel = (ioread32be(hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
+ clksel = (cg_in(hwc->cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
ret = hwc->clksel_to_parent[clksel];
if (ret < 0) {
@@ -705,7 +739,7 @@ static struct clk * __init create_one_cmux(struct clockgen *cg, int idx)
* default clksel) may be inappropriately excluded on certain
* chips.
*/
- clksel = (ioread32be(hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
+ clksel = (cg_in(cg, hwc->reg) & CLKSEL_MASK) >> CLKSEL_SHIFT;
div = get_pll_div(cg, hwc, clksel);
if (!div)
return NULL;
@@ -874,13 +908,36 @@ static void __init create_one_pll(struct clockgen *cg, int idx)
if (!(cg->info.pll_mask & (1 << idx)))
return;
- if (idx == PLATFORM_PLL)
- reg = cg->regs + 0xc00;
- else
- reg = cg->regs + 0x800 + 0x20 * (idx - 1);
+ if (cg->info.flags & CG_VER3) {
+ switch (idx) {
+ case PLATFORM_PLL:
+ reg = cg->regs + 0x60080;
+ break;
+ case CGA_PLL1:
+ reg = cg->regs + 0x80;
+ break;
+ case CGA_PLL2:
+ reg = cg->regs + 0xa0;
+ break;
+ case CGB_PLL1:
+ reg = cg->regs + 0x10080;
+ break;
+ case CGB_PLL2:
+ reg = cg->regs + 0x100a0;
+ break;
+ default:
+ WARN_ONCE(1, "index %d\n", idx);
+ return;
+ }
+ } else {
+ if (idx == PLATFORM_PLL)
+ reg = cg->regs + 0xc00;
+ else
+ reg = cg->regs + 0x800 + 0x20 * (idx - 1);
+ }
/* Get the multiple of PLL */
- mult = ioread32be(reg);
+ mult = cg_in(cg, reg);
/* Check if this PLL is disabled */
if (mult & PLL_KILL) {
@@ -888,7 +945,8 @@ static void __init create_one_pll(struct clockgen *cg, int idx)
return;
}
- if ((cg->info.flags & CG_PLL_8BIT) && idx != PLATFORM_PLL)
+ if ((cg->info.flags & CG_VER3) ||
+ ((cg->info.flags & CG_PLL_8BIT) && idx != PLATFORM_PLL))
mult = (mult & GENMASK(8, 1)) >> 1;
else
mult = (mult & GENMASK(6, 1)) >> 1;
@@ -1169,6 +1227,7 @@ err:
CLK_OF_DECLARE(qoriq_clockgen_1, "fsl,qoriq-clockgen-1.0", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_2, "fsl,qoriq-clockgen-2.0", clockgen_init);
CLK_OF_DECLARE(qoriq_clockgen_ls1021a, "fsl,ls1021a-clockgen", clockgen_init);
+CLK_OF_DECLARE(qoriq_clockgen_ls2080a, "fsl,ls2080a-clockgen", clockgen_init);
/* Legacy nodes */
CLK_OF_DECLARE(qoriq_sysclk_1, "fsl,qoriq-sysclk-1.0", sysclk_init);
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