Re: [PATCH 1/1] i2c: qcom-geni: add 32MHz I2C SE clock support for IPQ5424

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Hi Manikanta,

On 9/24/2024 12:20 PM, Manikanta Mylavarapu wrote:
The IPQ5424 I2C SE clock operates at a frequency of 32MHz. Since the
would it be better to say , I2C SE is sourced from 32MHZ ?
existing map table is based on 19.2MHz, this patch incorporate the
based on 19.2MHz. this patch /,/.
clock map table to derive the SCL clock from the 32MHz SE clock.
from the 32MHz Source Clock frequency.
SE = Expand OR  (I2C Serial Engine Controller)

Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@xxxxxxxxxxx>
---
  drivers/i2c/busses/i2c-qcom-geni.c | 11 +++++++++++
  1 file changed, 11 insertions(+)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index 212336f724a6..bbd9ecf09f4b 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -71,6 +71,7 @@ enum geni_i2c_err_code {
#define I2C_AUTO_SUSPEND_DELAY 250
  #define KHZ(freq)		(1000 * freq)
+#define MHZ(freq)		(1000000 * freq)
  #define PACKING_BYTES_PW	4
#define ABORT_TIMEOUT HZ
@@ -152,11 +153,21 @@ static const struct geni_i2c_clk_fld geni_i2c_clk_map[] = {
A thought - Should we rename this appending _19.2M ? In future one or more may come as it evolves speed.
  	{KHZ(1000), 1, 3,  9, 18},
  };
+/* source_clock = 32 MHz */
+static const struct geni_i2c_clk_fld geni_i2c_clk_map_32M[] = {
+	{KHZ(100), 7, 14, 18, 40},
+	{KHZ(400), 4,  3, 11, 20},
+	{KHZ(1000), 4, 3,  6, 15},
+};
+
  static int geni_i2c_clk_map_idx(struct geni_i2c_dev *gi2c)
  {
  	int i;
  	const struct geni_i2c_clk_fld *itr = geni_i2c_clk_map;
+ if (clk_get_rate(gi2c->se.clk) == MHZ(32))
+		itr = geni_i2c_clk_map_32M;
+
  	for (i = 0; i < ARRAY_SIZE(geni_i2c_clk_map); i++, itr++) {
  		if (itr->clk_freq_out == gi2c->clk_freq_out) {
  			gi2c->clk_fld = itr;




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