[U-Boot] [PATCH v3 1/2] clk: at91: enhance the peripheral clock

[Wenyou Yang]

Enhance the peripheral clock to support both at9sam9x5's
and at91rm9200's peripheral clock via the different compatibles.

Signed-off-by: Wenyou Yang <wenyou.y...@atmel.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---

Changes in v3: None
Changes in v2:
 - Use an enum with a descriptive name to denote the clock type.

 drivers/clk/at91/clk-peripheral.c | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/at91/clk-peripheral.c 
b/drivers/clk/at91/clk-peripheral.c
index e1ed447133..62fabe304d 100644
--- a/drivers/clk/at91/clk-peripheral.c
+++ b/drivers/clk/at91/clk-peripheral.c
@@ -16,6 +16,10 @@
 #define PERIPHERAL_ID_MAX      31
 #define PERIPHERAL_MASK(id)    (1 << ((id) & PERIPHERAL_ID_MAX))
 
+enum periph_clk_type {
+       CLK_PERIPH_AT91RM9200 = 0,
+       CLK_PERIPH_AT91SAM9X5,
+};
 /**
  * sam9x5_periph_clk_bind() - for the periph clock driver
  * Recursively bind its children as clk devices.
@@ -28,7 +32,14 @@ static int sam9x5_periph_clk_bind(struct udevice *dev)
 }
 
 static const struct udevice_id sam9x5_periph_clk_match[] = {
-       { .compatible = "atmel,at91sam9x5-clk-peripheral" },
+       {
+               .compatible = "atmel,at91rm9200-clk-peripheral",
+               .data = CLK_PERIPH_AT91RM9200,
+       },
+       {
+               .compatible = "atmel,at91sam9x5-clk-peripheral",
+               .data = CLK_PERIPH_AT91SAM9X5,
+       },
        {}
 };
 
@@ -45,12 +56,24 @@ static int periph_clk_enable(struct clk *clk)
 {
        struct pmc_platdata *plat = dev_get_platdata(clk->dev);
        struct at91_pmc *pmc = plat->reg_base;
+       enum periph_clk_type clk_type;
+       void *addr;
 
        if (clk->id < PERIPHERAL_ID_MIN)
                return -1;
 
-       writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
-       setbits_le32(&pmc->pcr, AT91_PMC_PCR_CMD_WRITE | AT91_PMC_PCR_EN);
+       clk_type = dev_get_driver_data(dev_get_parent(clk->dev));
+       if (clk_type == CLK_PERIPH_AT91RM9200) {
+               addr = &pmc->pcer;
+               if (clk->id > PERIPHERAL_ID_MAX)
+                       addr = &pmc->pcer1;
+
+               setbits_le32(addr, PERIPHERAL_MASK(clk->id));
+       } else {
+               writel(clk->id & AT91_PMC_PCR_PID_MASK, &pmc->pcr);
+               setbits_le32(&pmc->pcr,
+                            AT91_PMC_PCR_CMD_WRITE | AT91_PMC_PCR_EN);
+       }
 
        return 0;
 }
-- 
2.11.0

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